./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-commit-1.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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:10:34,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:10:34,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:10:34,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:10:34,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:10:34,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:10:34,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:10:34,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:10:34,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:10:34,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:10:34,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:10:34,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:10:34,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:10:34,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:10:34,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:10:34,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:10:34,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:10:34,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:10:34,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:10:34,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:10:34,611 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:10:34,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:10:34,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:10:34,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:10:34,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:10:34,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:10:34,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:10:34,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:10:34,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:10:34,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:10:34,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:10:34,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:10:34,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:10:34,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:10:34,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:10:34,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:10:34,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:10:34,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:10:34,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:10:34,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:10:34,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:10:34,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:10:34,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:10:34,637 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:10:34,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:10:34,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:10:34,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:10:34,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:10:34,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:10:34,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:10:34,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:10:34,639 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:10:34,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:10:34,640 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:10:34,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:10:34,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:10:34,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:10:34,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:10:34,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:10:34,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:10:34,641 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:10:34,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:10:34,642 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:10:34,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:10:34,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:10:34,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:10:34,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:10:34,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:10:34,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:10:34,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:10:34,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:10:34,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:10:34,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:10:34,644 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:10:34,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:10:34,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:10:34,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 [2022-07-13 22:10:34,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:10:34,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:10:34,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:10:34,820 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:10:34,820 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:10:34,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-07-13 22:10:34,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52154f7d6/fadd2d1e606d4b1ea762a1a5a30a271f/FLAGf789a6edb [2022-07-13 22:10:35,207 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:10:35,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-07-13 22:10:35,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52154f7d6/fadd2d1e606d4b1ea762a1a5a30a271f/FLAGf789a6edb [2022-07-13 22:10:35,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52154f7d6/fadd2d1e606d4b1ea762a1a5a30a271f [2022-07-13 22:10:35,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:10:35,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:10:35,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:10:35,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:10:35,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:10:35,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1125370d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35, skipping insertion in model container [2022-07-13 22:10:35,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:10:35,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:10:35,434 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-commit-1.wvr.c[4604,4617] [2022-07-13 22:10:35,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:10:35,445 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:10:35,462 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-commit-1.wvr.c[4604,4617] [2022-07-13 22:10:35,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:10:35,474 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:10:35,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35 WrapperNode [2022-07-13 22:10:35,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:10:35,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:10:35,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:10:35,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:10:35,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,524 INFO L137 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 333 [2022-07-13 22:10:35,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:10:35,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:10:35,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:10:35,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:10:35,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:10:35,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:10:35,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:10:35,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:10:35,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (1/1) ... [2022-07-13 22:10:35,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:10:35,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:35,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:10:35,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:10:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:10:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:10:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:10:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:10:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:10:35,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:10:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:10:35,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:10:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:10:35,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:10:35,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:10:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:10:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:10:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:10:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:10:35,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:10:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:10:35,660 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:10:35,725 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:10:35,727 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:10:36,075 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:10:36,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:10:36,230 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-13 22:10:36,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:10:36 BoogieIcfgContainer [2022-07-13 22:10:36,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:10:36,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:10:36,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:10:36,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:10:36,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:10:35" (1/3) ... [2022-07-13 22:10:36,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc8c439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:10:36, skipping insertion in model container [2022-07-13 22:10:36,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:35" (2/3) ... [2022-07-13 22:10:36,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc8c439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:10:36, skipping insertion in model container [2022-07-13 22:10:36,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:10:36" (3/3) ... [2022-07-13 22:10:36,243 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2022-07-13 22:10:36,247 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:10:36,253 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:10:36,253 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:10:36,253 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:10:36,313 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 22:10:36,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 254 transitions, 532 flow [2022-07-13 22:10:36,472 INFO L129 PetriNetUnfolder]: 19/251 cut-off events. [2022-07-13 22:10:36,473 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:10:36,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 251 events. 19/251 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2022-07-13 22:10:36,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 254 transitions, 532 flow [2022-07-13 22:10:36,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 240 transitions, 498 flow [2022-07-13 22:10:36,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:10:36,504 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@4d9433f8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c08355a [2022-07-13 22:10:36,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 22:10:36,542 INFO L129 PetriNetUnfolder]: 19/239 cut-off events. [2022-07-13 22:10:36,542 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:10:36,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:36,543 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:36,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:36,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1728033997, now seen corresponding path program 1 times [2022-07-13 22:10:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:36,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246523897] [2022-07-13 22:10:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:36,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:36,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:36,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246523897] [2022-07-13 22:10:36,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246523897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:36,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:36,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:10:36,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150889472] [2022-07-13 22:10:36,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:36,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:10:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:10:36,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:10:36,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 254 [2022-07-13 22:10:36,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 240 transitions, 498 flow. Second operand has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:36,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:36,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 254 [2022-07-13 22:10:36,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:36,902 INFO L129 PetriNetUnfolder]: 66/311 cut-off events. [2022-07-13 22:10:36,902 INFO L130 PetriNetUnfolder]: For 34/35 co-relation queries the response was YES. [2022-07-13 22:10:36,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 311 events. 66/311 cut-off events. For 34/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 446 event pairs, 31 based on Foata normal form. 42/332 useless extension candidates. Maximal degree in co-relation 251. Up to 99 conditions per place. [2022-07-13 22:10:36,906 INFO L132 encePairwiseOnDemand]: 241/254 looper letters, 14 selfloop transitions, 0 changer transitions 7/227 dead transitions. [2022-07-13 22:10:36,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 227 transitions, 500 flow [2022-07-13 22:10:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:10:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:10:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 479 transitions. [2022-07-13 22:10:36,921 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9429133858267716 [2022-07-13 22:10:36,922 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 479 transitions. [2022-07-13 22:10:36,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 479 transitions. [2022-07-13 22:10:36,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:36,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 479 transitions. [2022-07-13 22:10:36,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:36,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:36,937 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:36,938 INFO L186 Difference]: Start difference. First operand has 231 places, 240 transitions, 498 flow. Second operand 2 states and 479 transitions. [2022-07-13 22:10:36,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 227 transitions, 500 flow [2022-07-13 22:10:36,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 227 transitions, 488 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:10:36,946 INFO L242 Difference]: Finished difference. Result has 226 places, 220 transitions, 446 flow [2022-07-13 22:10:36,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=446, PETRI_PLACES=226, PETRI_TRANSITIONS=220} [2022-07-13 22:10:36,951 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -5 predicate places. [2022-07-13 22:10:36,951 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 220 transitions, 446 flow [2022-07-13 22:10:36,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:36,952 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:36,952 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:36,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:10:36,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:36,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1182409905, now seen corresponding path program 1 times [2022-07-13 22:10:36,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:36,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722163534] [2022-07-13 22:10:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:36,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:37,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:37,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722163534] [2022-07-13 22:10:37,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722163534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:37,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:37,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:10:37,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563945866] [2022-07-13 22:10:37,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:37,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:10:37,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:10:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:10:37,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 254 [2022-07-13 22:10:37,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 220 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:37,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 254 [2022-07-13 22:10:37,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:37,420 INFO L129 PetriNetUnfolder]: 79/371 cut-off events. [2022-07-13 22:10:37,420 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-13 22:10:37,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 371 events. 79/371 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 754 event pairs, 8 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 539. Up to 115 conditions per place. [2022-07-13 22:10:37,424 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 48 selfloop transitions, 4 changer transitions 4/232 dead transitions. [2022-07-13 22:10:37,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 232 transitions, 587 flow [2022-07-13 22:10:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:10:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:10:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2022-07-13 22:10:37,427 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7889763779527559 [2022-07-13 22:10:37,427 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2022-07-13 22:10:37,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2022-07-13 22:10:37,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:37,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2022-07-13 22:10:37,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,433 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,434 INFO L186 Difference]: Start difference. First operand has 226 places, 220 transitions, 446 flow. Second operand 5 states and 1002 transitions. [2022-07-13 22:10:37,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 232 transitions, 587 flow [2022-07-13 22:10:37,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 232 transitions, 587 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:10:37,442 INFO L242 Difference]: Finished difference. Result has 226 places, 223 transitions, 476 flow [2022-07-13 22:10:37,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=226, PETRI_TRANSITIONS=223} [2022-07-13 22:10:37,443 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -5 predicate places. [2022-07-13 22:10:37,444 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 223 transitions, 476 flow [2022-07-13 22:10:37,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,445 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:37,445 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:37,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:10:37,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash 811659123, now seen corresponding path program 1 times [2022-07-13 22:10:37,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:37,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610912473] [2022-07-13 22:10:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:37,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:37,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610912473] [2022-07-13 22:10:37,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610912473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:37,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:37,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:10:37,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660018742] [2022-07-13 22:10:37,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:37,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:10:37,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:37,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:10:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:10:37,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-13 22:10:37,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 223 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:37,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-13 22:10:37,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:37,778 INFO L129 PetriNetUnfolder]: 83/511 cut-off events. [2022-07-13 22:10:37,779 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-13 22:10:37,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 511 events. 83/511 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1273 event pairs, 36 based on Foata normal form. 13/495 useless extension candidates. Maximal degree in co-relation 794. Up to 145 conditions per place. [2022-07-13 22:10:37,781 INFO L132 encePairwiseOnDemand]: 242/254 looper letters, 51 selfloop transitions, 8 changer transitions 32/259 dead transitions. [2022-07-13 22:10:37,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 259 transitions, 739 flow [2022-07-13 22:10:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:10:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:10:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1783 transitions. [2022-07-13 22:10:37,785 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7799650043744532 [2022-07-13 22:10:37,785 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1783 transitions. [2022-07-13 22:10:37,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1783 transitions. [2022-07-13 22:10:37,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:37,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1783 transitions. [2022-07-13 22:10:37,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.11111111111111) internal successors, (1783), 9 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,792 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,792 INFO L186 Difference]: Start difference. First operand has 226 places, 223 transitions, 476 flow. Second operand 9 states and 1783 transitions. [2022-07-13 22:10:37,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 259 transitions, 739 flow [2022-07-13 22:10:37,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 259 transitions, 730 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 22:10:37,797 INFO L242 Difference]: Finished difference. Result has 231 places, 224 transitions, 502 flow [2022-07-13 22:10:37,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=502, PETRI_PLACES=231, PETRI_TRANSITIONS=224} [2022-07-13 22:10:37,798 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 0 predicate places. [2022-07-13 22:10:37,798 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 224 transitions, 502 flow [2022-07-13 22:10:37,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:37,799 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:37,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:10:37,800 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1273864345, now seen corresponding path program 1 times [2022-07-13 22:10:37,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:37,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038330770] [2022-07-13 22:10:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:37,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:10:37,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:37,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038330770] [2022-07-13 22:10:37,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038330770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:37,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:37,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:10:37,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198101582] [2022-07-13 22:10:37,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:37,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:10:37,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:37,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:10:37,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:10:37,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-13 22:10:37,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 224 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:37,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:37,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-13 22:10:37,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:38,006 INFO L129 PetriNetUnfolder]: 84/434 cut-off events. [2022-07-13 22:10:38,006 INFO L130 PetriNetUnfolder]: For 88/89 co-relation queries the response was YES. [2022-07-13 22:10:38,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 434 events. 84/434 cut-off events. For 88/89 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1118 event pairs, 40 based on Foata normal form. 12/416 useless extension candidates. Maximal degree in co-relation 699. Up to 104 conditions per place. [2022-07-13 22:10:38,008 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 26 selfloop transitions, 6 changer transitions 0/232 dead transitions. [2022-07-13 22:10:38,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 232 transitions, 593 flow [2022-07-13 22:10:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:10:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:10:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-07-13 22:10:38,011 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8927165354330708 [2022-07-13 22:10:38,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-07-13 22:10:38,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-07-13 22:10:38,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:38,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-07-13 22:10:38,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,015 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,015 INFO L186 Difference]: Start difference. First operand has 231 places, 224 transitions, 502 flow. Second operand 4 states and 907 transitions. [2022-07-13 22:10:38,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 232 transitions, 593 flow [2022-07-13 22:10:38,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 232 transitions, 579 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-13 22:10:38,019 INFO L242 Difference]: Finished difference. Result has 228 places, 224 transitions, 504 flow [2022-07-13 22:10:38,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=504, PETRI_PLACES=228, PETRI_TRANSITIONS=224} [2022-07-13 22:10:38,020 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -3 predicate places. [2022-07-13 22:10:38,020 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 224 transitions, 504 flow [2022-07-13 22:10:38,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,021 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:38,021 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:38,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:10:38,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:38,022 INFO L85 PathProgramCache]: Analyzing trace with hash 642704095, now seen corresponding path program 1 times [2022-07-13 22:10:38,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532057679] [2022-07-13 22:10:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:38,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:10:38,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532057679] [2022-07-13 22:10:38,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532057679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:38,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:38,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:10:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354418967] [2022-07-13 22:10:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:10:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:10:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:10:38,174 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-13 22:10:38,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 224 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:38,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-13 22:10:38,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:38,251 INFO L129 PetriNetUnfolder]: 96/423 cut-off events. [2022-07-13 22:10:38,251 INFO L130 PetriNetUnfolder]: For 124/125 co-relation queries the response was YES. [2022-07-13 22:10:38,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 423 events. 96/423 cut-off events. For 124/125 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1109 event pairs, 18 based on Foata normal form. 8/413 useless extension candidates. Maximal degree in co-relation 747. Up to 107 conditions per place. [2022-07-13 22:10:38,254 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 24 selfloop transitions, 6 changer transitions 3/233 dead transitions. [2022-07-13 22:10:38,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 599 flow [2022-07-13 22:10:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:10:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:10:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2022-07-13 22:10:38,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8956692913385826 [2022-07-13 22:10:38,256 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2022-07-13 22:10:38,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2022-07-13 22:10:38,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:38,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2022-07-13 22:10:38,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,260 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,260 INFO L186 Difference]: Start difference. First operand has 228 places, 224 transitions, 504 flow. Second operand 4 states and 910 transitions. [2022-07-13 22:10:38,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 599 flow [2022-07-13 22:10:38,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 233 transitions, 589 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:10:38,264 INFO L242 Difference]: Finished difference. Result has 230 places, 224 transitions, 510 flow [2022-07-13 22:10:38,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=510, PETRI_PLACES=230, PETRI_TRANSITIONS=224} [2022-07-13 22:10:38,266 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -1 predicate places. [2022-07-13 22:10:38,266 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 224 transitions, 510 flow [2022-07-13 22:10:38,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:38,267 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:38,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:10:38,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1052780232, now seen corresponding path program 1 times [2022-07-13 22:10:38,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:38,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619840040] [2022-07-13 22:10:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:10:38,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619840040] [2022-07-13 22:10:38,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619840040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:38,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:38,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:10:38,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630026340] [2022-07-13 22:10:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:38,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:10:38,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:10:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:10:38,363 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-13 22:10:38,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 224 transitions, 510 flow. Second operand has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:38,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-13 22:10:38,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:38,542 INFO L129 PetriNetUnfolder]: 121/551 cut-off events. [2022-07-13 22:10:38,543 INFO L130 PetriNetUnfolder]: For 162/164 co-relation queries the response was YES. [2022-07-13 22:10:38,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 551 events. 121/551 cut-off events. For 162/164 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1666 event pairs, 73 based on Foata normal form. 7/530 useless extension candidates. Maximal degree in co-relation 1057. Up to 168 conditions per place. [2022-07-13 22:10:38,545 INFO L132 encePairwiseOnDemand]: 244/254 looper letters, 52 selfloop transitions, 8 changer transitions 25/253 dead transitions. [2022-07-13 22:10:38,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 253 transitions, 758 flow [2022-07-13 22:10:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:10:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:10:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1774 transitions. [2022-07-13 22:10:38,548 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7760279965004374 [2022-07-13 22:10:38,549 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1774 transitions. [2022-07-13 22:10:38,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1774 transitions. [2022-07-13 22:10:38,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:38,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1774 transitions. [2022-07-13 22:10:38,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.11111111111111) internal successors, (1774), 9 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,556 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,556 INFO L186 Difference]: Start difference. First operand has 230 places, 224 transitions, 510 flow. Second operand 9 states and 1774 transitions. [2022-07-13 22:10:38,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 253 transitions, 758 flow [2022-07-13 22:10:38,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 253 transitions, 748 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:10:38,561 INFO L242 Difference]: Finished difference. Result has 238 places, 225 transitions, 528 flow [2022-07-13 22:10:38,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=238, PETRI_TRANSITIONS=225} [2022-07-13 22:10:38,564 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 7 predicate places. [2022-07-13 22:10:38,564 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 225 transitions, 528 flow [2022-07-13 22:10:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,565 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:38,565 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:38,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:10:38,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1352398940, now seen corresponding path program 1 times [2022-07-13 22:10:38,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437489344] [2022-07-13 22:10:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:10:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437489344] [2022-07-13 22:10:38,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437489344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:38,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:38,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:10:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244948463] [2022-07-13 22:10:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:38,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:10:38,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:10:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:10:38,651 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-13 22:10:38,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 225 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:38,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-13 22:10:38,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:38,808 INFO L129 PetriNetUnfolder]: 101/483 cut-off events. [2022-07-13 22:10:38,808 INFO L130 PetriNetUnfolder]: For 159/161 co-relation queries the response was YES. [2022-07-13 22:10:38,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 483 events. 101/483 cut-off events. For 159/161 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1332 event pairs, 60 based on Foata normal form. 4/465 useless extension candidates. Maximal degree in co-relation 923. Up to 165 conditions per place. [2022-07-13 22:10:38,811 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 55 selfloop transitions, 6 changer transitions 9/238 dead transitions. [2022-07-13 22:10:38,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 238 transitions, 706 flow [2022-07-13 22:10:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:10:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:10:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1382 transitions. [2022-07-13 22:10:38,813 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772778402699663 [2022-07-13 22:10:38,813 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1382 transitions. [2022-07-13 22:10:38,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1382 transitions. [2022-07-13 22:10:38,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:38,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1382 transitions. [2022-07-13 22:10:38,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.42857142857142) internal successors, (1382), 7 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,819 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,819 INFO L186 Difference]: Start difference. First operand has 238 places, 225 transitions, 528 flow. Second operand 7 states and 1382 transitions. [2022-07-13 22:10:38,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 238 transitions, 706 flow [2022-07-13 22:10:38,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 238 transitions, 688 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-13 22:10:38,823 INFO L242 Difference]: Finished difference. Result has 238 places, 226 transitions, 532 flow [2022-07-13 22:10:38,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=532, PETRI_PLACES=238, PETRI_TRANSITIONS=226} [2022-07-13 22:10:38,824 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 7 predicate places. [2022-07-13 22:10:38,824 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 226 transitions, 532 flow [2022-07-13 22:10:38,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,825 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:38,825 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:38,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:10:38,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:38,826 INFO L85 PathProgramCache]: Analyzing trace with hash -879290637, now seen corresponding path program 1 times [2022-07-13 22:10:38,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:38,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143913886] [2022-07-13 22:10:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:38,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:10:38,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:38,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143913886] [2022-07-13 22:10:38,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143913886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:38,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:38,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:10:38,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827610614] [2022-07-13 22:10:38,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:38,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:10:38,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:10:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:10:38,988 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-13 22:10:38,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 226 transitions, 532 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:38,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:38,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-13 22:10:38,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:39,053 INFO L129 PetriNetUnfolder]: 52/372 cut-off events. [2022-07-13 22:10:39,053 INFO L130 PetriNetUnfolder]: For 110/114 co-relation queries the response was YES. [2022-07-13 22:10:39,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 372 events. 52/372 cut-off events. For 110/114 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 690 event pairs, 20 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 584. Up to 84 conditions per place. [2022-07-13 22:10:39,055 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 19 selfloop transitions, 6 changer transitions 3/230 dead transitions. [2022-07-13 22:10:39,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 230 transitions, 601 flow [2022-07-13 22:10:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:10:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:10:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2022-07-13 22:10:39,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8963254593175853 [2022-07-13 22:10:39,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2022-07-13 22:10:39,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2022-07-13 22:10:39,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:39,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2022-07-13 22:10:39,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,059 INFO L186 Difference]: Start difference. First operand has 238 places, 226 transitions, 532 flow. Second operand 3 states and 683 transitions. [2022-07-13 22:10:39,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 230 transitions, 601 flow [2022-07-13 22:10:39,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 230 transitions, 589 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-13 22:10:39,063 INFO L242 Difference]: Finished difference. Result has 235 places, 227 transitions, 546 flow [2022-07-13 22:10:39,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=546, PETRI_PLACES=235, PETRI_TRANSITIONS=227} [2022-07-13 22:10:39,065 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 4 predicate places. [2022-07-13 22:10:39,065 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 227 transitions, 546 flow [2022-07-13 22:10:39,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:39,066 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:39,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:10:39,066 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:39,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1058869021, now seen corresponding path program 1 times [2022-07-13 22:10:39,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:39,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306693022] [2022-07-13 22:10:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:39,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:10:39,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306693022] [2022-07-13 22:10:39,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306693022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:39,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:39,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:10:39,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386611704] [2022-07-13 22:10:39,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:39,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:10:39,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:10:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:10:39,181 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 254 [2022-07-13 22:10:39,182 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 227 transitions, 546 flow. Second operand has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:39,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 254 [2022-07-13 22:10:39,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:39,291 INFO L129 PetriNetUnfolder]: 134/666 cut-off events. [2022-07-13 22:10:39,291 INFO L130 PetriNetUnfolder]: For 352/371 co-relation queries the response was YES. [2022-07-13 22:10:39,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 666 events. 134/666 cut-off events. For 352/371 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2551 event pairs, 35 based on Foata normal form. 8/626 useless extension candidates. Maximal degree in co-relation 1220. Up to 100 conditions per place. [2022-07-13 22:10:39,294 INFO L132 encePairwiseOnDemand]: 249/254 looper letters, 35 selfloop transitions, 9 changer transitions 0/249 dead transitions. [2022-07-13 22:10:39,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 249 transitions, 728 flow [2022-07-13 22:10:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:10:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:10:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2022-07-13 22:10:39,297 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9133858267716536 [2022-07-13 22:10:39,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2022-07-13 22:10:39,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2022-07-13 22:10:39,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:39,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2022-07-13 22:10:39,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,300 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,300 INFO L186 Difference]: Start difference. First operand has 235 places, 227 transitions, 546 flow. Second operand 4 states and 928 transitions. [2022-07-13 22:10:39,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 249 transitions, 728 flow [2022-07-13 22:10:39,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 249 transitions, 722 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:10:39,304 INFO L242 Difference]: Finished difference. Result has 239 places, 233 transitions, 613 flow [2022-07-13 22:10:39,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=613, PETRI_PLACES=239, PETRI_TRANSITIONS=233} [2022-07-13 22:10:39,305 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 8 predicate places. [2022-07-13 22:10:39,305 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 233 transitions, 613 flow [2022-07-13 22:10:39,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,306 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:39,306 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:10:39,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:39,307 INFO L85 PathProgramCache]: Analyzing trace with hash 505081247, now seen corresponding path program 1 times [2022-07-13 22:10:39,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:39,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760972348] [2022-07-13 22:10:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:39,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:10:39,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760972348] [2022-07-13 22:10:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760972348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491416959] [2022-07-13 22:10:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:39,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:39,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:39,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:10:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:10:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:10:39,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:10:40,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491416959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:40,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:40,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:10:40,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154883233] [2022-07-13 22:10:40,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:40,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:10:40,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:10:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:10:40,039 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-13 22:10:40,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 233 transitions, 613 flow. Second operand has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:40,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:40,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-13 22:10:40,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:40,465 INFO L129 PetriNetUnfolder]: 138/847 cut-off events. [2022-07-13 22:10:40,465 INFO L130 PetriNetUnfolder]: For 700/714 co-relation queries the response was YES. [2022-07-13 22:10:40,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 847 events. 138/847 cut-off events. For 700/714 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3213 event pairs, 63 based on Foata normal form. 1/785 useless extension candidates. Maximal degree in co-relation 1700. Up to 246 conditions per place. [2022-07-13 22:10:40,470 INFO L132 encePairwiseOnDemand]: 235/254 looper letters, 58 selfloop transitions, 20 changer transitions 41/282 dead transitions. [2022-07-13 22:10:40,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 282 transitions, 1001 flow [2022-07-13 22:10:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 22:10:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-13 22:10:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3217 transitions. [2022-07-13 22:10:40,475 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7450208429828624 [2022-07-13 22:10:40,475 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3217 transitions. [2022-07-13 22:10:40,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3217 transitions. [2022-07-13 22:10:40,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:40,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3217 transitions. [2022-07-13 22:10:40,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 189.23529411764707) internal successors, (3217), 17 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:40,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 254.0) internal successors, (4572), 18 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:40,486 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 254.0) internal successors, (4572), 18 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:40,486 INFO L186 Difference]: Start difference. First operand has 239 places, 233 transitions, 613 flow. Second operand 17 states and 3217 transitions. [2022-07-13 22:10:40,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 282 transitions, 1001 flow [2022-07-13 22:10:40,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 282 transitions, 977 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-13 22:10:40,491 INFO L242 Difference]: Finished difference. Result has 261 places, 237 transitions, 671 flow [2022-07-13 22:10:40,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=671, PETRI_PLACES=261, PETRI_TRANSITIONS=237} [2022-07-13 22:10:40,492 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 30 predicate places. [2022-07-13 22:10:40,492 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 237 transitions, 671 flow [2022-07-13 22:10:40,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:40,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:40,494 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:40,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:40,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 22:10:40,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:40,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1762191461, now seen corresponding path program 2 times [2022-07-13 22:10:40,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:40,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128236327] [2022-07-13 22:10:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:40,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:10:40,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:40,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128236327] [2022-07-13 22:10:40,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128236327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:40,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447106161] [2022-07-13 22:10:40,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:10:40,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:40,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:40,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:10:40,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:10:40,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:40,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 22:10:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:10:41,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:10:41,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447106161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:41,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:41,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:10:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632436334] [2022-07-13 22:10:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:41,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:10:41,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:10:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:10:41,439 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-13 22:10:41,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 237 transitions, 671 flow. Second operand has 19 states, 19 states have (on average 187.47368421052633) internal successors, (3562), 19 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:41,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:41,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-13 22:10:41,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:41,878 INFO L129 PetriNetUnfolder]: 168/965 cut-off events. [2022-07-13 22:10:41,878 INFO L130 PetriNetUnfolder]: For 825/841 co-relation queries the response was YES. [2022-07-13 22:10:41,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 965 events. 168/965 cut-off events. For 825/841 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4414 event pairs, 70 based on Foata normal form. 39/927 useless extension candidates. Maximal degree in co-relation 1995. Up to 234 conditions per place. [2022-07-13 22:10:41,883 INFO L132 encePairwiseOnDemand]: 236/254 looper letters, 61 selfloop transitions, 21 changer transitions 42/287 dead transitions. [2022-07-13 22:10:41,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 287 transitions, 1135 flow [2022-07-13 22:10:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:10:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:10:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3030 transitions. [2022-07-13 22:10:41,888 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7455708661417323 [2022-07-13 22:10:41,888 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3030 transitions. [2022-07-13 22:10:41,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3030 transitions. [2022-07-13 22:10:41,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:41,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3030 transitions. [2022-07-13 22:10:41,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 189.375) internal successors, (3030), 16 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:41,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:41,898 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:41,899 INFO L186 Difference]: Start difference. First operand has 261 places, 237 transitions, 671 flow. Second operand 16 states and 3030 transitions. [2022-07-13 22:10:41,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 287 transitions, 1135 flow [2022-07-13 22:10:41,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 287 transitions, 1081 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-13 22:10:41,904 INFO L242 Difference]: Finished difference. Result has 269 places, 241 transitions, 720 flow [2022-07-13 22:10:41,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=720, PETRI_PLACES=269, PETRI_TRANSITIONS=241} [2022-07-13 22:10:41,904 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 38 predicate places. [2022-07-13 22:10:41,904 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 241 transitions, 720 flow [2022-07-13 22:10:41,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.47368421052633) internal successors, (3562), 19 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:41,905 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:41,906 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:41,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:42,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 22:10:42,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:10:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash 642213491, now seen corresponding path program 3 times [2022-07-13 22:10:42,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:42,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522887357] [2022-07-13 22:10:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:42,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:46,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522887357] [2022-07-13 22:10:46,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522887357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:46,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107681009] [2022-07-13 22:10:46,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:10:46,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:46,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:46,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:46,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:10:46,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:10:46,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:46,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-13 22:10:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 22:10:48,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:12,698 INFO L356 Elim1Store]: treesize reduction 97, result has 81.5 percent of original size [2022-07-13 22:11:12,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 128 treesize of output 453 [2022-07-13 22:11:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 22:11:15,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107681009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:15,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:15,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 17, 15] total 75 [2022-07-13 22:11:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970228577] [2022-07-13 22:11:15,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:15,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-13 22:11:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-13 22:11:15,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=5072, Unknown=13, NotChecked=0, Total=5550 [2022-07-13 22:11:15,043 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 254 [2022-07-13 22:11:15,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 241 transitions, 720 flow. Second operand has 75 states, 75 states have (on average 105.8) internal successors, (7935), 75 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:15,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:15,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 254 [2022-07-13 22:11:15,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:23,951 INFO L129 PetriNetUnfolder]: 403/1559 cut-off events. [2022-07-13 22:11:23,951 INFO L130 PetriNetUnfolder]: For 1499/1515 co-relation queries the response was YES. [2022-07-13 22:11:23,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3815 conditions, 1559 events. 403/1559 cut-off events. For 1499/1515 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7962 event pairs, 68 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 3790. Up to 524 conditions per place. [2022-07-13 22:11:23,962 INFO L132 encePairwiseOnDemand]: 191/254 looper letters, 249 selfloop transitions, 131 changer transitions 36/504 dead transitions. [2022-07-13 22:11:23,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 504 transitions, 2409 flow [2022-07-13 22:11:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-13 22:11:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2022-07-13 22:11:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 11816 transitions. [2022-07-13 22:11:23,978 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.41167862866699184 [2022-07-13 22:11:23,979 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 11816 transitions. [2022-07-13 22:11:23,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 11816 transitions. [2022-07-13 22:11:23,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:23,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 11816 transitions. [2022-07-13 22:11:24,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 104.56637168141593) internal successors, (11816), 113 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:24,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 254.0) internal successors, (28956), 114 states have internal predecessors, (28956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:24,041 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 254.0) internal successors, (28956), 114 states have internal predecessors, (28956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:24,041 INFO L186 Difference]: Start difference. First operand has 269 places, 241 transitions, 720 flow. Second operand 113 states and 11816 transitions. [2022-07-13 22:11:24,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 504 transitions, 2409 flow [2022-07-13 22:11:24,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 504 transitions, 2305 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-07-13 22:11:24,052 INFO L242 Difference]: Finished difference. Result has 397 places, 349 transitions, 1528 flow [2022-07-13 22:11:24,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=1528, PETRI_PLACES=397, PETRI_TRANSITIONS=349} [2022-07-13 22:11:24,053 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 166 predicate places. [2022-07-13 22:11:24,053 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 349 transitions, 1528 flow [2022-07-13 22:11:24,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 105.8) internal successors, (7935), 75 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:24,055 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:24,055 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:24,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 22:11:24,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:24,273 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:11:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:24,274 INFO L85 PathProgramCache]: Analyzing trace with hash 329244297, now seen corresponding path program 4 times [2022-07-13 22:11:24,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:24,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131209536] [2022-07-13 22:11:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:24,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:11:24,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:24,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131209536] [2022-07-13 22:11:24,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131209536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:24,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246001611] [2022-07-13 22:11:24,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:11:24,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:24,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:24,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:11:24,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:11:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:24,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:11:24,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:11:24,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:11:25,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246001611] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:25,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:25,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-13 22:11:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476377172] [2022-07-13 22:11:25,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:25,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 22:11:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 22:11:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-07-13 22:11:25,087 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-13 22:11:25,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 349 transitions, 1528 flow. Second operand has 28 states, 28 states have (on average 187.14285714285714) internal successors, (5240), 28 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:25,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:25,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-13 22:11:25,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:25,778 INFO L129 PetriNetUnfolder]: 173/1156 cut-off events. [2022-07-13 22:11:25,778 INFO L130 PetriNetUnfolder]: For 1152/1166 co-relation queries the response was YES. [2022-07-13 22:11:25,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2694 conditions, 1156 events. 173/1156 cut-off events. For 1152/1166 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5226 event pairs, 47 based on Foata normal form. 11/1103 useless extension candidates. Maximal degree in co-relation 2643. Up to 271 conditions per place. [2022-07-13 22:11:25,807 INFO L132 encePairwiseOnDemand]: 230/254 looper letters, 73 selfloop transitions, 25 changer transitions 129/390 dead transitions. [2022-07-13 22:11:25,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 390 transitions, 2128 flow [2022-07-13 22:11:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 22:11:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-13 22:11:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4514 transitions. [2022-07-13 22:11:25,812 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.740485564304462 [2022-07-13 22:11:25,812 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4514 transitions. [2022-07-13 22:11:25,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4514 transitions. [2022-07-13 22:11:25,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:25,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4514 transitions. [2022-07-13 22:11:25,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 188.08333333333334) internal successors, (4514), 24 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:25,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:25,823 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:25,823 INFO L186 Difference]: Start difference. First operand has 397 places, 349 transitions, 1528 flow. Second operand 24 states and 4514 transitions. [2022-07-13 22:11:25,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 390 transitions, 2128 flow [2022-07-13 22:11:25,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 390 transitions, 1979 flow, removed 55 selfloop flow, removed 14 redundant places. [2022-07-13 22:11:25,832 INFO L242 Difference]: Finished difference. Result has 407 places, 256 transitions, 953 flow [2022-07-13 22:11:25,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=953, PETRI_PLACES=407, PETRI_TRANSITIONS=256} [2022-07-13 22:11:25,833 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 176 predicate places. [2022-07-13 22:11:25,833 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 256 transitions, 953 flow [2022-07-13 22:11:25,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 187.14285714285714) internal successors, (5240), 28 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:25,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:25,835 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:25,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 22:11:26,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:26,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:11:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 60836953, now seen corresponding path program 5 times [2022-07-13 22:11:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34011015] [2022-07-13 22:11:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 22:11:26,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34011015] [2022-07-13 22:11:26,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34011015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:11:26,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:11:26,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:11:26,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162098985] [2022-07-13 22:11:26,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:11:26,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:11:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:11:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:11:26,170 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 254 [2022-07-13 22:11:26,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 256 transitions, 953 flow. Second operand has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:26,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:26,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 254 [2022-07-13 22:11:26,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:26,409 INFO L129 PetriNetUnfolder]: 337/1352 cut-off events. [2022-07-13 22:11:26,409 INFO L130 PetriNetUnfolder]: For 2093/2109 co-relation queries the response was YES. [2022-07-13 22:11:26,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 1352 events. 337/1352 cut-off events. For 2093/2109 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7178 event pairs, 79 based on Foata normal form. 33/1309 useless extension candidates. Maximal degree in co-relation 3414. Up to 207 conditions per place. [2022-07-13 22:11:26,420 INFO L132 encePairwiseOnDemand]: 251/254 looper letters, 61 selfloop transitions, 6 changer transitions 0/284 dead transitions. [2022-07-13 22:11:26,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 284 transitions, 1280 flow [2022-07-13 22:11:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:11:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:11:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2022-07-13 22:11:26,421 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9133858267716536 [2022-07-13 22:11:26,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2022-07-13 22:11:26,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2022-07-13 22:11:26,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:26,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2022-07-13 22:11:26,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:26,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:26,424 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:26,424 INFO L186 Difference]: Start difference. First operand has 407 places, 256 transitions, 953 flow. Second operand 4 states and 928 transitions. [2022-07-13 22:11:26,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 284 transitions, 1280 flow [2022-07-13 22:11:26,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 284 transitions, 1126 flow, removed 49 selfloop flow, removed 43 redundant places. [2022-07-13 22:11:26,433 INFO L242 Difference]: Finished difference. Result has 278 places, 254 transitions, 830 flow [2022-07-13 22:11:26,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=830, PETRI_PLACES=278, PETRI_TRANSITIONS=254} [2022-07-13 22:11:26,434 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 47 predicate places. [2022-07-13 22:11:26,434 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 254 transitions, 830 flow [2022-07-13 22:11:26,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:26,435 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:26,435 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:26,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 22:11:26,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:11:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1601424871, now seen corresponding path program 6 times [2022-07-13 22:11:26,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223306360] [2022-07-13 22:11:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:26,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 22:11:26,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:26,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223306360] [2022-07-13 22:11:26,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223306360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:26,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63656867] [2022-07-13 22:11:26,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:11:26,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:26,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:26,575 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) [2022-07-13 22:11:26,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:11:26,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 22:11:26,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:11:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-13 22:11:26,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 22:11:27,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63656867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:27,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:27,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-07-13 22:11:27,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088607642] [2022-07-13 22:11:27,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:27,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:11:27,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:27,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:11:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:11:27,179 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-13 22:11:27,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 254 transitions, 830 flow. Second operand has 8 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:27,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:27,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-13 22:11:27,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:27,246 INFO L129 PetriNetUnfolder]: 14/351 cut-off events. [2022-07-13 22:11:27,246 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-13 22:11:27,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 351 events. 14/351 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 453 event pairs, 6 based on Foata normal form. 11/353 useless extension candidates. Maximal degree in co-relation 578. Up to 47 conditions per place. [2022-07-13 22:11:27,248 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 23 selfloop transitions, 9 changer transitions 0/246 dead transitions. [2022-07-13 22:11:27,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 246 transitions, 828 flow [2022-07-13 22:11:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:11:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:11:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1338 transitions. [2022-07-13 22:11:27,249 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8779527559055118 [2022-07-13 22:11:27,249 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1338 transitions. [2022-07-13 22:11:27,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1338 transitions. [2022-07-13 22:11:27,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:27,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1338 transitions. [2022-07-13 22:11:27,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:27,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:27,255 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:27,255 INFO L186 Difference]: Start difference. First operand has 278 places, 254 transitions, 830 flow. Second operand 6 states and 1338 transitions. [2022-07-13 22:11:27,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 246 transitions, 828 flow [2022-07-13 22:11:27,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 246 transitions, 777 flow, removed 2 selfloop flow, removed 9 redundant places. [2022-07-13 22:11:27,259 INFO L242 Difference]: Finished difference. Result has 274 places, 244 transitions, 725 flow [2022-07-13 22:11:27,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=725, PETRI_PLACES=274, PETRI_TRANSITIONS=244} [2022-07-13 22:11:27,260 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 43 predicate places. [2022-07-13 22:11:27,260 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 244 transitions, 725 flow [2022-07-13 22:11:27,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:27,261 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:27,261 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:27,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:27,478 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,SelfDestructingSolverStorable14 [2022-07-13 22:11:27,479 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:11:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1127042464, now seen corresponding path program 7 times [2022-07-13 22:11:27,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:27,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464317323] [2022-07-13 22:11:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:27,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 22:11:27,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:27,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464317323] [2022-07-13 22:11:27,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464317323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:27,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516642323] [2022-07-13 22:11:27,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:11:27,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:27,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:27,637 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) [2022-07-13 22:11:27,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:11:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:11:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 22:11:27,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 22:11:28,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516642323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:28,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:28,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2022-07-13 22:11:28,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304493534] [2022-07-13 22:11:28,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:28,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 22:11:28,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 22:11:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-07-13 22:11:28,155 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 254 [2022-07-13 22:11:28,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 244 transitions, 725 flow. Second operand has 28 states, 28 states have (on average 184.64285714285714) internal successors, (5170), 28 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:28,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:28,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 254 [2022-07-13 22:11:28,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:29,361 INFO L129 PetriNetUnfolder]: 34/848 cut-off events. [2022-07-13 22:11:29,361 INFO L130 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2022-07-13 22:11:29,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 848 events. 34/848 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3457 event pairs, 20 based on Foata normal form. 3/804 useless extension candidates. Maximal degree in co-relation 1448. Up to 58 conditions per place. [2022-07-13 22:11:29,365 INFO L132 encePairwiseOnDemand]: 223/254 looper letters, 73 selfloop transitions, 30 changer transitions 113/375 dead transitions. [2022-07-13 22:11:29,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 375 transitions, 1680 flow [2022-07-13 22:11:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-13 22:11:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-13 22:11:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 10761 transitions. [2022-07-13 22:11:29,380 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7180701988522621 [2022-07-13 22:11:29,381 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 10761 transitions. [2022-07-13 22:11:29,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 10761 transitions. [2022-07-13 22:11:29,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:29,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 10761 transitions. [2022-07-13 22:11:29,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 182.38983050847457) internal successors, (10761), 59 states have internal predecessors, (10761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:29,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 254.0) internal successors, (15240), 60 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:29,413 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 254.0) internal successors, (15240), 60 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:29,414 INFO L186 Difference]: Start difference. First operand has 274 places, 244 transitions, 725 flow. Second operand 59 states and 10761 transitions. [2022-07-13 22:11:29,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 375 transitions, 1680 flow [2022-07-13 22:11:29,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 375 transitions, 1643 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-13 22:11:29,421 INFO L242 Difference]: Finished difference. Result has 359 places, 252 transitions, 898 flow [2022-07-13 22:11:29,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=898, PETRI_PLACES=359, PETRI_TRANSITIONS=252} [2022-07-13 22:11:29,422 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 128 predicate places. [2022-07-13 22:11:29,423 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 252 transitions, 898 flow [2022-07-13 22:11:29,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 184.64285714285714) internal successors, (5170), 28 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:29,424 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:29,424 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:29,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:29,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 22:11:29,642 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:11:29,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash -429007627, now seen corresponding path program 8 times [2022-07-13 22:11:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:29,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087441380] [2022-07-13 22:11:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:29,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 22:11:29,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087441380] [2022-07-13 22:11:29,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087441380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:29,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479968793] [2022-07-13 22:11:29,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:11:29,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:29,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:29,884 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) [2022-07-13 22:11:29,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:11:30,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:11:30,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:11:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 22:11:30,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 22:11:30,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479968793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:30,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:30,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-13 22:11:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478471194] [2022-07-13 22:11:30,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:30,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 22:11:30,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 22:11:30,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-07-13 22:11:30,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 254 [2022-07-13 22:11:30,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 252 transitions, 898 flow. Second operand has 28 states, 28 states have (on average 185.5) internal successors, (5194), 28 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:30,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:30,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 254 [2022-07-13 22:11:30,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:31,326 INFO L129 PetriNetUnfolder]: 21/576 cut-off events. [2022-07-13 22:11:31,326 INFO L130 PetriNetUnfolder]: For 425/425 co-relation queries the response was YES. [2022-07-13 22:11:31,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 576 events. 21/576 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1529 event pairs, 14 based on Foata normal form. 3/554 useless extension candidates. Maximal degree in co-relation 1129. Up to 64 conditions per place. [2022-07-13 22:11:31,329 INFO L132 encePairwiseOnDemand]: 230/254 looper letters, 60 selfloop transitions, 40 changer transitions 48/309 dead transitions. [2022-07-13 22:11:31,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 309 transitions, 1503 flow [2022-07-13 22:11:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 22:11:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-13 22:11:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5729 transitions. [2022-07-13 22:11:31,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7275844551689103 [2022-07-13 22:11:31,335 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5729 transitions. [2022-07-13 22:11:31,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5729 transitions. [2022-07-13 22:11:31,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:31,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5729 transitions. [2022-07-13 22:11:31,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 184.80645161290323) internal successors, (5729), 31 states have internal predecessors, (5729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:31,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 254.0) internal successors, (8128), 32 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:31,345 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 254.0) internal successors, (8128), 32 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:31,345 INFO L186 Difference]: Start difference. First operand has 359 places, 252 transitions, 898 flow. Second operand 31 states and 5729 transitions. [2022-07-13 22:11:31,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 309 transitions, 1503 flow [2022-07-13 22:11:31,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 309 transitions, 1310 flow, removed 71 selfloop flow, removed 43 redundant places. [2022-07-13 22:11:31,351 INFO L242 Difference]: Finished difference. Result has 325 places, 256 transitions, 910 flow [2022-07-13 22:11:31,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=910, PETRI_PLACES=325, PETRI_TRANSITIONS=256} [2022-07-13 22:11:31,352 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 94 predicate places. [2022-07-13 22:11:31,352 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 256 transitions, 910 flow [2022-07-13 22:11:31,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 185.5) internal successors, (5194), 28 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:31,353 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:31,353 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:31,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:31,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:31,571 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:11:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1560661591, now seen corresponding path program 9 times [2022-07-13 22:11:31,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:31,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820565754] [2022-07-13 22:11:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:31,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:40,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:40,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820565754] [2022-07-13 22:11:40,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820565754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:40,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468705476] [2022-07-13 22:11:40,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:11:40,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:40,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:40,087 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) [2022-07-13 22:11:40,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:11:40,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 22:11:40,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:40,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 153 conjunts are in the unsatisfiable core [2022-07-13 22:11:40,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:52,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:11:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:11:52,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:11:52,643 INFO L356 Elim1Store]: treesize reduction 422, result has 34.1 percent of original size [2022-07-13 22:11:52,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 160 treesize of output 249 [2022-07-13 22:11:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-13 22:11:52,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:06,421 INFO L356 Elim1Store]: treesize reduction 577, result has 74.2 percent of original size [2022-07-13 22:12:06,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 291 treesize of output 1714