./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/security.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/security.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 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:16:16,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:16:16,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:16:16,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:16:16,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:16:16,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:16:16,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:16:16,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:16:16,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:16:16,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:16:16,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:16:16,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:16:16,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:16:16,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:16:16,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:16:16,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:16:16,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:16:16,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:16:16,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:16:16,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:16:16,570 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:16:16,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:16:16,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:16:16,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:16:16,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:16:16,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:16:16,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:16:16,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:16:16,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:16:16,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:16:16,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:16:16,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:16:16,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:16:16,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:16:16,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:16:16,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:16:16,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:16:16,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:16:16,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:16:16,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:16:16,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:16:16,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:16:16,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:16:16,636 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:16:16,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:16:16,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:16:16,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:16:16,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:16:16,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:16:16,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:16:16,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:16:16,640 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:16:16,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:16:16,641 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:16:16,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:16:16,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:16:16,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:16:16,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:16:16,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:16:16,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:16:16,642 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:16:16,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:16:16,642 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:16:16,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:16:16,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:16:16,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:16:16,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:16:16,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:16:16,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:16:16,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:16:16,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:16:16,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:16:16,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:16:16,644 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:16:16,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:16:16,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:16:16,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 [2022-07-21 09:16:16,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:16:16,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:16:16,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:16:16,999 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:16:16,999 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:16:17,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/security.wvr.c [2022-07-21 09:16:17,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7dd5f18/4805301f7fa94dec804c9532ebb190e2/FLAGb10625444 [2022-07-21 09:16:17,529 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:16:17,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/security.wvr.c [2022-07-21 09:16:17,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7dd5f18/4805301f7fa94dec804c9532ebb190e2/FLAGb10625444 [2022-07-21 09:16:18,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7dd5f18/4805301f7fa94dec804c9532ebb190e2 [2022-07-21 09:16:18,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:16:18,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:16:18,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:16:18,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:16:18,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:16:18,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69abb04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18, skipping insertion in model container [2022-07-21 09:16:18,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:16:18,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:16:18,198 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/security.wvr.c[1931,1944] [2022-07-21 09:16:18,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:16:18,206 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:16:18,226 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/security.wvr.c[1931,1944] [2022-07-21 09:16:18,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:16:18,258 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:16:18,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18 WrapperNode [2022-07-21 09:16:18,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:16:18,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:16:18,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:16:18,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:16:18,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,291 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-07-21 09:16:18,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:16:18,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:16:18,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:16:18,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:16:18,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:16:18,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:16:18,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:16:18,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:16:18,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (1/1) ... [2022-07-21 09:16:18,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:16:18,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:18,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:16:18,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:16:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:16:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:16:18,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:16:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:16:18,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:16:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:16:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:16:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:16:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:16:18,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:16:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:16:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:16:18,390 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:16:18,459 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:16:18,460 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:16:18,663 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:16:18,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:16:18,669 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 09:16:18,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:16:18 BoogieIcfgContainer [2022-07-21 09:16:18,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:16:18,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:16:18,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:16:18,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:16:18,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:16:18" (1/3) ... [2022-07-21 09:16:18,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2ebc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:16:18, skipping insertion in model container [2022-07-21 09:16:18,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:18" (2/3) ... [2022-07-21 09:16:18,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2ebc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:16:18, skipping insertion in model container [2022-07-21 09:16:18,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:16:18" (3/3) ... [2022-07-21 09:16:18,689 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2022-07-21 09:16:18,697 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:16:18,705 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:16:18,705 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:16:18,705 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:16:18,773 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:16:18,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 178 flow [2022-07-21 09:16:18,889 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2022-07-21 09:16:18,889 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:16:18,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 3/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2022-07-21 09:16:18,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 81 transitions, 178 flow [2022-07-21 09:16:18,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 70 transitions, 152 flow [2022-07-21 09:16:18,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:16:18,922 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@3c011926, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23bf313b [2022-07-21 09:16:18,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:16:18,949 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2022-07-21 09:16:18,950 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:16:18,950 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:18,951 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:18,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:18,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1803071327, now seen corresponding path program 1 times [2022-07-21 09:16:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:18,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152497299] [2022-07-21 09:16:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:18,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:19,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152497299] [2022-07-21 09:16:19,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152497299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:19,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:19,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:19,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390186965] [2022-07-21 09:16:19,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:19,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:19,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:19,535 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:19,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 152 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:19,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:19,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:19,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:19,959 INFO L129 PetriNetUnfolder]: 32/219 cut-off events. [2022-07-21 09:16:19,959 INFO L130 PetriNetUnfolder]: For 57/60 co-relation queries the response was YES. [2022-07-21 09:16:19,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 219 events. 32/219 cut-off events. For 57/60 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 902 event pairs, 11 based on Foata normal form. 5/213 useless extension candidates. Maximal degree in co-relation 170. Up to 47 conditions per place. [2022-07-21 09:16:19,962 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 34 selfloop transitions, 2 changer transitions 24/106 dead transitions. [2022-07-21 09:16:19,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 377 flow [2022-07-21 09:16:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:16:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:16:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 906 transitions. [2022-07-21 09:16:19,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.745679012345679 [2022-07-21 09:16:19,980 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 906 transitions. [2022-07-21 09:16:19,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 906 transitions. [2022-07-21 09:16:19,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:19,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 906 transitions. [2022-07-21 09:16:19,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.4) internal successors, (906), 15 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:19,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:19,998 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:19,999 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 152 flow. Second operand 15 states and 906 transitions. [2022-07-21 09:16:20,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 377 flow [2022-07-21 09:16:20,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 347 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:16:20,006 INFO L242 Difference]: Finished difference. Result has 95 places, 69 transitions, 175 flow [2022-07-21 09:16:20,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=175, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2022-07-21 09:16:20,011 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-07-21 09:16:20,012 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 175 flow [2022-07-21 09:16:20,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,012 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:20,013 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:16:20,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2123246751, now seen corresponding path program 2 times [2022-07-21 09:16:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:20,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595759688] [2022-07-21 09:16:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:20,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:20,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595759688] [2022-07-21 09:16:20,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595759688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:20,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:20,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:20,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894615340] [2022-07-21 09:16:20,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:20,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:20,252 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:20,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 175 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:20,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:20,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:20,594 INFO L129 PetriNetUnfolder]: 28/247 cut-off events. [2022-07-21 09:16:20,594 INFO L130 PetriNetUnfolder]: For 136/137 co-relation queries the response was YES. [2022-07-21 09:16:20,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 247 events. 28/247 cut-off events. For 136/137 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1140 event pairs, 11 based on Foata normal form. 2/240 useless extension candidates. Maximal degree in co-relation 459. Up to 47 conditions per place. [2022-07-21 09:16:20,596 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 49 selfloop transitions, 7 changer transitions 12/114 dead transitions. [2022-07-21 09:16:20,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 114 transitions, 513 flow [2022-07-21 09:16:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:16:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:16:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2022-07-21 09:16:20,599 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2022-07-21 09:16:20,599 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2022-07-21 09:16:20,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2022-07-21 09:16:20,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:20,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2022-07-21 09:16:20,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,605 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,605 INFO L186 Difference]: Start difference. First operand has 95 places, 69 transitions, 175 flow. Second operand 14 states and 854 transitions. [2022-07-21 09:16:20,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 114 transitions, 513 flow [2022-07-21 09:16:20,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 420 flow, removed 46 selfloop flow, removed 10 redundant places. [2022-07-21 09:16:20,610 INFO L242 Difference]: Finished difference. Result has 98 places, 75 transitions, 225 flow [2022-07-21 09:16:20,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=225, PETRI_PLACES=98, PETRI_TRANSITIONS=75} [2022-07-21 09:16:20,611 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2022-07-21 09:16:20,612 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 75 transitions, 225 flow [2022-07-21 09:16:20,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,612 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:20,612 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:20,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:16:20,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:20,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1598753897, now seen corresponding path program 3 times [2022-07-21 09:16:20,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:20,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928915245] [2022-07-21 09:16:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:20,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:20,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928915245] [2022-07-21 09:16:20,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928915245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:20,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:20,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926899838] [2022-07-21 09:16:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:20,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:20,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:20,750 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:20,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 75 transitions, 225 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:20,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:20,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:20,922 INFO L129 PetriNetUnfolder]: 27/233 cut-off events. [2022-07-21 09:16:20,923 INFO L130 PetriNetUnfolder]: For 192/193 co-relation queries the response was YES. [2022-07-21 09:16:20,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 233 events. 27/233 cut-off events. For 192/193 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1054 event pairs, 4 based on Foata normal form. 1/225 useless extension candidates. Maximal degree in co-relation 467. Up to 40 conditions per place. [2022-07-21 09:16:20,926 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 32 selfloop transitions, 10 changer transitions 8/96 dead transitions. [2022-07-21 09:16:20,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 96 transitions, 433 flow [2022-07-21 09:16:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 545 transitions. [2022-07-21 09:16:20,929 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.747599451303155 [2022-07-21 09:16:20,929 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 545 transitions. [2022-07-21 09:16:20,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 545 transitions. [2022-07-21 09:16:20,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:20,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 545 transitions. [2022-07-21 09:16:20,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.55555555555556) internal successors, (545), 9 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,933 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,934 INFO L186 Difference]: Start difference. First operand has 98 places, 75 transitions, 225 flow. Second operand 9 states and 545 transitions. [2022-07-21 09:16:20,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 96 transitions, 433 flow [2022-07-21 09:16:20,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 96 transitions, 413 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-21 09:16:20,941 INFO L242 Difference]: Finished difference. Result has 99 places, 75 transitions, 246 flow [2022-07-21 09:16:20,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=246, PETRI_PLACES=99, PETRI_TRANSITIONS=75} [2022-07-21 09:16:20,943 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2022-07-21 09:16:20,943 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 75 transitions, 246 flow [2022-07-21 09:16:20,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:20,944 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:20,944 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:16:20,945 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash 606748351, now seen corresponding path program 4 times [2022-07-21 09:16:20,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:20,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215816484] [2022-07-21 09:16:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:20,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:21,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215816484] [2022-07-21 09:16:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215816484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:21,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:21,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:21,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710108486] [2022-07-21 09:16:21,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:21,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:21,123 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:21,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 75 transitions, 246 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:21,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:21,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:21,298 INFO L129 PetriNetUnfolder]: 27/245 cut-off events. [2022-07-21 09:16:21,298 INFO L130 PetriNetUnfolder]: For 333/337 co-relation queries the response was YES. [2022-07-21 09:16:21,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 245 events. 27/245 cut-off events. For 333/337 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1136 event pairs, 16 based on Foata normal form. 4/238 useless extension candidates. Maximal degree in co-relation 516. Up to 47 conditions per place. [2022-07-21 09:16:21,300 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 42 selfloop transitions, 3 changer transitions 9/100 dead transitions. [2022-07-21 09:16:21,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 469 flow [2022-07-21 09:16:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 558 transitions. [2022-07-21 09:16:21,302 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7654320987654321 [2022-07-21 09:16:21,302 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 558 transitions. [2022-07-21 09:16:21,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 558 transitions. [2022-07-21 09:16:21,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:21,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 558 transitions. [2022-07-21 09:16:21,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.0) internal successors, (558), 9 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,315 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,315 INFO L186 Difference]: Start difference. First operand has 99 places, 75 transitions, 246 flow. Second operand 9 states and 558 transitions. [2022-07-21 09:16:21,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 469 flow [2022-07-21 09:16:21,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 100 transitions, 419 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-07-21 09:16:21,322 INFO L242 Difference]: Finished difference. Result has 102 places, 76 transitions, 252 flow [2022-07-21 09:16:21,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=102, PETRI_TRANSITIONS=76} [2022-07-21 09:16:21,324 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2022-07-21 09:16:21,324 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 76 transitions, 252 flow [2022-07-21 09:16:21,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,325 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:21,327 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:21,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:16:21,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:21,329 INFO L85 PathProgramCache]: Analyzing trace with hash 39404075, now seen corresponding path program 5 times [2022-07-21 09:16:21,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:21,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788080680] [2022-07-21 09:16:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:21,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:21,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788080680] [2022-07-21 09:16:21,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788080680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:21,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:21,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111851229] [2022-07-21 09:16:21,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:21,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:21,477 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:21,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 76 transitions, 252 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:21,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:21,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:21,666 INFO L129 PetriNetUnfolder]: 25/259 cut-off events. [2022-07-21 09:16:21,666 INFO L130 PetriNetUnfolder]: For 308/310 co-relation queries the response was YES. [2022-07-21 09:16:21,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 259 events. 25/259 cut-off events. For 308/310 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1277 event pairs, 6 based on Foata normal form. 1/250 useless extension candidates. Maximal degree in co-relation 534. Up to 63 conditions per place. [2022-07-21 09:16:21,668 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 38 selfloop transitions, 9 changer transitions 8/101 dead transitions. [2022-07-21 09:16:21,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 101 transitions, 504 flow [2022-07-21 09:16:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2022-07-21 09:16:21,670 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2022-07-21 09:16:21,670 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2022-07-21 09:16:21,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2022-07-21 09:16:21,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:21,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2022-07-21 09:16:21,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,674 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,674 INFO L186 Difference]: Start difference. First operand has 102 places, 76 transitions, 252 flow. Second operand 9 states and 549 transitions. [2022-07-21 09:16:21,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 101 transitions, 504 flow [2022-07-21 09:16:21,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 101 transitions, 475 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-07-21 09:16:21,678 INFO L242 Difference]: Finished difference. Result has 106 places, 78 transitions, 299 flow [2022-07-21 09:16:21,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=299, PETRI_PLACES=106, PETRI_TRANSITIONS=78} [2022-07-21 09:16:21,679 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 32 predicate places. [2022-07-21 09:16:21,679 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 78 transitions, 299 flow [2022-07-21 09:16:21,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:21,680 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:16:21,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1222135401, now seen corresponding path program 6 times [2022-07-21 09:16:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465052932] [2022-07-21 09:16:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465052932] [2022-07-21 09:16:21,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465052932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:21,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:21,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:21,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095040555] [2022-07-21 09:16:21,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:21,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:21,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:21,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:21,792 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:21,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 78 transitions, 299 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:21,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:21,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:21,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:22,024 INFO L129 PetriNetUnfolder]: 24/247 cut-off events. [2022-07-21 09:16:22,025 INFO L130 PetriNetUnfolder]: For 460/465 co-relation queries the response was YES. [2022-07-21 09:16:22,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 247 events. 24/247 cut-off events. For 460/465 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1182 event pairs, 16 based on Foata normal form. 3/241 useless extension candidates. Maximal degree in co-relation 546. Up to 47 conditions per place. [2022-07-21 09:16:22,026 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 31 selfloop transitions, 2 changer transitions 25/104 dead transitions. [2022-07-21 09:16:22,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 104 transitions, 538 flow [2022-07-21 09:16:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:16:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:16:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 842 transitions. [2022-07-21 09:16:22,029 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7425044091710759 [2022-07-21 09:16:22,029 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 842 transitions. [2022-07-21 09:16:22,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 842 transitions. [2022-07-21 09:16:22,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:22,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 842 transitions. [2022-07-21 09:16:22,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,034 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,034 INFO L186 Difference]: Start difference. First operand has 106 places, 78 transitions, 299 flow. Second operand 14 states and 842 transitions. [2022-07-21 09:16:22,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 104 transitions, 538 flow [2022-07-21 09:16:22,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 104 transitions, 502 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-21 09:16:22,038 INFO L242 Difference]: Finished difference. Result has 118 places, 71 transitions, 228 flow [2022-07-21 09:16:22,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=228, PETRI_PLACES=118, PETRI_TRANSITIONS=71} [2022-07-21 09:16:22,039 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 44 predicate places. [2022-07-21 09:16:22,039 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 71 transitions, 228 flow [2022-07-21 09:16:22,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,040 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:22,040 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:22,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:16:22,041 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:22,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2131364533, now seen corresponding path program 7 times [2022-07-21 09:16:22,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:22,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953407114] [2022-07-21 09:16:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:22,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:22,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:22,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953407114] [2022-07-21 09:16:22,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953407114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:22,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:22,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:22,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980713105] [2022-07-21 09:16:22,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:22,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:22,190 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:22,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 71 transitions, 228 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:22,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:22,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:22,376 INFO L129 PetriNetUnfolder]: 20/214 cut-off events. [2022-07-21 09:16:22,377 INFO L130 PetriNetUnfolder]: For 353/353 co-relation queries the response was YES. [2022-07-21 09:16:22,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 214 events. 20/214 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 911 event pairs, 4 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 487. Up to 30 conditions per place. [2022-07-21 09:16:22,379 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 45 selfloop transitions, 5 changer transitions 8/104 dead transitions. [2022-07-21 09:16:22,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 104 transitions, 532 flow [2022-07-21 09:16:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 560 transitions. [2022-07-21 09:16:22,381 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7681755829903978 [2022-07-21 09:16:22,381 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 560 transitions. [2022-07-21 09:16:22,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 560 transitions. [2022-07-21 09:16:22,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:22,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 560 transitions. [2022-07-21 09:16:22,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.22222222222222) internal successors, (560), 9 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,385 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,385 INFO L186 Difference]: Start difference. First operand has 118 places, 71 transitions, 228 flow. Second operand 9 states and 560 transitions. [2022-07-21 09:16:22,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 104 transitions, 532 flow [2022-07-21 09:16:22,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 104 transitions, 429 flow, removed 50 selfloop flow, removed 14 redundant places. [2022-07-21 09:16:22,388 INFO L242 Difference]: Finished difference. Result has 100 places, 73 transitions, 240 flow [2022-07-21 09:16:22,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=240, PETRI_PLACES=100, PETRI_TRANSITIONS=73} [2022-07-21 09:16:22,389 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 26 predicate places. [2022-07-21 09:16:22,390 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 73 transitions, 240 flow [2022-07-21 09:16:22,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,390 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:22,390 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:22,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:16:22,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash -702033037, now seen corresponding path program 8 times [2022-07-21 09:16:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:22,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100134916] [2022-07-21 09:16:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:22,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:22,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:22,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100134916] [2022-07-21 09:16:22,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100134916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:22,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:22,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:22,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494350234] [2022-07-21 09:16:22,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:22,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:22,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:22,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:22,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:22,504 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:22,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 73 transitions, 240 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:22,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:22,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:22,637 INFO L129 PetriNetUnfolder]: 17/185 cut-off events. [2022-07-21 09:16:22,638 INFO L130 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-07-21 09:16:22,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 185 events. 17/185 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 673 event pairs, 4 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 386. Up to 30 conditions per place. [2022-07-21 09:16:22,639 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 31 selfloop transitions, 5 changer transitions 9/91 dead transitions. [2022-07-21 09:16:22,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 91 transitions, 402 flow [2022-07-21 09:16:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 547 transitions. [2022-07-21 09:16:22,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7503429355281207 [2022-07-21 09:16:22,642 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 547 transitions. [2022-07-21 09:16:22,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 547 transitions. [2022-07-21 09:16:22,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:22,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 547 transitions. [2022-07-21 09:16:22,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.77777777777778) internal successors, (547), 9 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,645 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,645 INFO L186 Difference]: Start difference. First operand has 100 places, 73 transitions, 240 flow. Second operand 9 states and 547 transitions. [2022-07-21 09:16:22,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 91 transitions, 402 flow [2022-07-21 09:16:22,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 91 transitions, 377 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-21 09:16:22,649 INFO L242 Difference]: Finished difference. Result has 105 places, 72 transitions, 237 flow [2022-07-21 09:16:22,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=237, PETRI_PLACES=105, PETRI_TRANSITIONS=72} [2022-07-21 09:16:22,652 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 31 predicate places. [2022-07-21 09:16:22,652 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 72 transitions, 237 flow [2022-07-21 09:16:22,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,653 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:22,653 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:22,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:16:22,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1379725623, now seen corresponding path program 9 times [2022-07-21 09:16:22,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:22,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953193993] [2022-07-21 09:16:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:22,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:22,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:22,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953193993] [2022-07-21 09:16:22,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953193993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:22,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:22,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:22,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209456409] [2022-07-21 09:16:22,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:22,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:22,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:22,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:22,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 72 transitions, 237 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:22,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:22,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:22,981 INFO L129 PetriNetUnfolder]: 15/160 cut-off events. [2022-07-21 09:16:22,981 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-21 09:16:22,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 160 events. 15/160 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 514 event pairs, 2 based on Foata normal form. 1/155 useless extension candidates. Maximal degree in co-relation 336. Up to 30 conditions per place. [2022-07-21 09:16:22,982 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 31 selfloop transitions, 2 changer transitions 11/90 dead transitions. [2022-07-21 09:16:22,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 90 transitions, 406 flow [2022-07-21 09:16:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2022-07-21 09:16:22,985 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2022-07-21 09:16:22,985 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2022-07-21 09:16:22,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2022-07-21 09:16:22,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:22,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2022-07-21 09:16:22,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,989 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,989 INFO L186 Difference]: Start difference. First operand has 105 places, 72 transitions, 237 flow. Second operand 9 states and 548 transitions. [2022-07-21 09:16:22,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 90 transitions, 406 flow [2022-07-21 09:16:22,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 90 transitions, 355 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-07-21 09:16:22,992 INFO L242 Difference]: Finished difference. Result has 101 places, 69 transitions, 189 flow [2022-07-21 09:16:22,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=189, PETRI_PLACES=101, PETRI_TRANSITIONS=69} [2022-07-21 09:16:22,993 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 27 predicate places. [2022-07-21 09:16:22,993 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 69 transitions, 189 flow [2022-07-21 09:16:22,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:22,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:22,994 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:22,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:16:22,994 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1892410847, now seen corresponding path program 10 times [2022-07-21 09:16:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812513891] [2022-07-21 09:16:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:23,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:23,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812513891] [2022-07-21 09:16:23,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812513891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:23,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:23,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:16:23,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833624936] [2022-07-21 09:16:23,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:23,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:16:23,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:16:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:16:23,135 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2022-07-21 09:16:23,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 69 transitions, 189 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:23,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2022-07-21 09:16:23,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:23,268 INFO L129 PetriNetUnfolder]: 15/134 cut-off events. [2022-07-21 09:16:23,268 INFO L130 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2022-07-21 09:16:23,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 134 events. 15/134 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 352 event pairs, 2 based on Foata normal form. 1/129 useless extension candidates. Maximal degree in co-relation 263. Up to 23 conditions per place. [2022-07-21 09:16:23,269 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 24 selfloop transitions, 3 changer transitions 10/83 dead transitions. [2022-07-21 09:16:23,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 83 transitions, 318 flow [2022-07-21 09:16:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 542 transitions. [2022-07-21 09:16:23,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7434842249657064 [2022-07-21 09:16:23,273 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 542 transitions. [2022-07-21 09:16:23,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 542 transitions. [2022-07-21 09:16:23,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:23,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 542 transitions. [2022-07-21 09:16:23,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.22222222222222) internal successors, (542), 9 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,287 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,288 INFO L186 Difference]: Start difference. First operand has 101 places, 69 transitions, 189 flow. Second operand 9 states and 542 transitions. [2022-07-21 09:16:23,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 83 transitions, 318 flow [2022-07-21 09:16:23,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 286 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-07-21 09:16:23,290 INFO L242 Difference]: Finished difference. Result has 95 places, 67 transitions, 160 flow [2022-07-21 09:16:23,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2022-07-21 09:16:23,291 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-07-21 09:16:23,292 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 160 flow [2022-07-21 09:16:23,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,292 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:23,292 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:16:23,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 499925854, now seen corresponding path program 1 times [2022-07-21 09:16:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:23,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816626681] [2022-07-21 09:16:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:23,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:23,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:23,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816626681] [2022-07-21 09:16:23,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816626681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:23,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:23,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735073502] [2022-07-21 09:16:23,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:23,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:23,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 160 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:23,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:23,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:23,717 INFO L129 PetriNetUnfolder]: 23/163 cut-off events. [2022-07-21 09:16:23,717 INFO L130 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-07-21 09:16:23,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 163 events. 23/163 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 504 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 318. Up to 19 conditions per place. [2022-07-21 09:16:23,718 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 32 selfloop transitions, 3 changer transitions 20/99 dead transitions. [2022-07-21 09:16:23,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 412 flow [2022-07-21 09:16:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:16:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:16:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 813 transitions. [2022-07-21 09:16:23,721 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.716931216931217 [2022-07-21 09:16:23,721 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 813 transitions. [2022-07-21 09:16:23,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 813 transitions. [2022-07-21 09:16:23,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:23,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 813 transitions. [2022-07-21 09:16:23,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,726 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,726 INFO L186 Difference]: Start difference. First operand has 95 places, 67 transitions, 160 flow. Second operand 14 states and 813 transitions. [2022-07-21 09:16:23,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 412 flow [2022-07-21 09:16:23,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 348 flow, removed 20 selfloop flow, removed 9 redundant places. [2022-07-21 09:16:23,729 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 174 flow [2022-07-21 09:16:23,729 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=174, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-07-21 09:16:23,729 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2022-07-21 09:16:23,730 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 174 flow [2022-07-21 09:16:23,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:23,730 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:16:23,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1637742648, now seen corresponding path program 2 times [2022-07-21 09:16:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035938567] [2022-07-21 09:16:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035938567] [2022-07-21 09:16:23,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035938567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:23,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:23,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732666751] [2022-07-21 09:16:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:23,849 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:23,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 174 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:23,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:23,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:23,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:24,120 INFO L129 PetriNetUnfolder]: 23/221 cut-off events. [2022-07-21 09:16:24,120 INFO L130 PetriNetUnfolder]: For 115/116 co-relation queries the response was YES. [2022-07-21 09:16:24,121 INFO L84 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 221 events. 23/221 cut-off events. For 115/116 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 914 event pairs, 8 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 472. Up to 35 conditions per place. [2022-07-21 09:16:24,122 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 48 selfloop transitions, 7 changer transitions 14/113 dead transitions. [2022-07-21 09:16:24,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 113 transitions, 524 flow [2022-07-21 09:16:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:16:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:16:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 935 transitions. [2022-07-21 09:16:24,124 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7214506172839507 [2022-07-21 09:16:24,124 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 935 transitions. [2022-07-21 09:16:24,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 935 transitions. [2022-07-21 09:16:24,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:24,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 935 transitions. [2022-07-21 09:16:24,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.4375) internal successors, (935), 16 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,129 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,129 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 174 flow. Second operand 16 states and 935 transitions. [2022-07-21 09:16:24,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 113 transitions, 524 flow [2022-07-21 09:16:24,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 113 transitions, 422 flow, removed 40 selfloop flow, removed 12 redundant places. [2022-07-21 09:16:24,132 INFO L242 Difference]: Finished difference. Result has 104 places, 73 transitions, 232 flow [2022-07-21 09:16:24,132 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=232, PETRI_PLACES=104, PETRI_TRANSITIONS=73} [2022-07-21 09:16:24,133 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2022-07-21 09:16:24,133 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 73 transitions, 232 flow [2022-07-21 09:16:24,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:24,134 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:24,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 09:16:24,134 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:24,134 INFO L85 PathProgramCache]: Analyzing trace with hash -980388572, now seen corresponding path program 3 times [2022-07-21 09:16:24,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:24,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781838805] [2022-07-21 09:16:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:24,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:24,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:24,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781838805] [2022-07-21 09:16:24,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781838805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:24,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:24,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918929376] [2022-07-21 09:16:24,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:24,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:24,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 73 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:24,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:24,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:24,438 INFO L129 PetriNetUnfolder]: 23/222 cut-off events. [2022-07-21 09:16:24,439 INFO L130 PetriNetUnfolder]: For 197/200 co-relation queries the response was YES. [2022-07-21 09:16:24,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 222 events. 23/222 cut-off events. For 197/200 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 914 event pairs, 7 based on Foata normal form. 3/213 useless extension candidates. Maximal degree in co-relation 506. Up to 29 conditions per place. [2022-07-21 09:16:24,441 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 41 selfloop transitions, 5 changer transitions 11/101 dead transitions. [2022-07-21 09:16:24,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 501 flow [2022-07-21 09:16:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 591 transitions. [2022-07-21 09:16:24,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7296296296296296 [2022-07-21 09:16:24,443 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 591 transitions. [2022-07-21 09:16:24,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 591 transitions. [2022-07-21 09:16:24,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:24,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 591 transitions. [2022-07-21 09:16:24,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.1) internal successors, (591), 10 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:24,446 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:24,446 INFO L186 Difference]: Start difference. First operand has 104 places, 73 transitions, 232 flow. Second operand 10 states and 591 transitions. [2022-07-21 09:16:24,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 501 flow [2022-07-21 09:16:24,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 101 transitions, 457 flow, removed 22 selfloop flow, removed 8 redundant places. [2022-07-21 09:16:24,449 INFO L242 Difference]: Finished difference. Result has 105 places, 76 transitions, 265 flow [2022-07-21 09:16:24,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=265, PETRI_PLACES=105, PETRI_TRANSITIONS=76} [2022-07-21 09:16:24,450 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 31 predicate places. [2022-07-21 09:16:24,450 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 76 transitions, 265 flow [2022-07-21 09:16:24,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,450 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:24,451 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:24,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 09:16:24,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1469204850, now seen corresponding path program 4 times [2022-07-21 09:16:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599340965] [2022-07-21 09:16:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:24,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599340965] [2022-07-21 09:16:24,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599340965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:24,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:24,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294250722] [2022-07-21 09:16:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:24,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:24,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:24,555 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:24,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 76 transitions, 265 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:24,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:24,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:24,869 INFO L129 PetriNetUnfolder]: 24/337 cut-off events. [2022-07-21 09:16:24,870 INFO L130 PetriNetUnfolder]: For 330/333 co-relation queries the response was YES. [2022-07-21 09:16:24,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 337 events. 24/337 cut-off events. For 330/333 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1932 event pairs, 4 based on Foata normal form. 5/334 useless extension candidates. Maximal degree in co-relation 762. Up to 57 conditions per place. [2022-07-21 09:16:24,872 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 58 selfloop transitions, 12 changer transitions 15/129 dead transitions. [2022-07-21 09:16:24,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 129 transitions, 709 flow [2022-07-21 09:16:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:16:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:16:24,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 883 transitions. [2022-07-21 09:16:24,874 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7267489711934156 [2022-07-21 09:16:24,874 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 883 transitions. [2022-07-21 09:16:24,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 883 transitions. [2022-07-21 09:16:24,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:24,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 883 transitions. [2022-07-21 09:16:24,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.86666666666667) internal successors, (883), 15 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,878 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,878 INFO L186 Difference]: Start difference. First operand has 105 places, 76 transitions, 265 flow. Second operand 15 states and 883 transitions. [2022-07-21 09:16:24,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 129 transitions, 709 flow [2022-07-21 09:16:24,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 129 transitions, 666 flow, removed 20 selfloop flow, removed 5 redundant places. [2022-07-21 09:16:24,882 INFO L242 Difference]: Finished difference. Result has 122 places, 84 transitions, 395 flow [2022-07-21 09:16:24,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=395, PETRI_PLACES=122, PETRI_TRANSITIONS=84} [2022-07-21 09:16:24,883 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 48 predicate places. [2022-07-21 09:16:24,883 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 84 transitions, 395 flow [2022-07-21 09:16:24,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,884 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:24,884 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:24,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:16:24,884 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash -944383944, now seen corresponding path program 5 times [2022-07-21 09:16:24,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:24,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131881794] [2022-07-21 09:16:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:24,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:24,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:24,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131881794] [2022-07-21 09:16:24,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131881794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:24,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:24,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:24,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053978745] [2022-07-21 09:16:24,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:24,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:24,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:24,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:24,997 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:24,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 84 transitions, 395 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:24,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:24,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:24,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:25,299 INFO L129 PetriNetUnfolder]: 20/344 cut-off events. [2022-07-21 09:16:25,299 INFO L130 PetriNetUnfolder]: For 614/621 co-relation queries the response was YES. [2022-07-21 09:16:25,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 344 events. 20/344 cut-off events. For 614/621 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2032 event pairs, 6 based on Foata normal form. 4/340 useless extension candidates. Maximal degree in co-relation 879. Up to 52 conditions per place. [2022-07-21 09:16:25,301 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 61 selfloop transitions, 15 changer transitions 13/133 dead transitions. [2022-07-21 09:16:25,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 133 transitions, 851 flow [2022-07-21 09:16:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:16:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:16:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 945 transitions. [2022-07-21 09:16:25,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2022-07-21 09:16:25,304 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 945 transitions. [2022-07-21 09:16:25,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 945 transitions. [2022-07-21 09:16:25,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:25,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 945 transitions. [2022-07-21 09:16:25,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0625) internal successors, (945), 16 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,308 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,308 INFO L186 Difference]: Start difference. First operand has 122 places, 84 transitions, 395 flow. Second operand 16 states and 945 transitions. [2022-07-21 09:16:25,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 133 transitions, 851 flow [2022-07-21 09:16:25,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 133 transitions, 771 flow, removed 39 selfloop flow, removed 7 redundant places. [2022-07-21 09:16:25,314 INFO L242 Difference]: Finished difference. Result has 136 places, 88 transitions, 490 flow [2022-07-21 09:16:25,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=490, PETRI_PLACES=136, PETRI_TRANSITIONS=88} [2022-07-21 09:16:25,315 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 62 predicate places. [2022-07-21 09:16:25,315 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 88 transitions, 490 flow [2022-07-21 09:16:25,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,315 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:25,316 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:25,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:16:25,316 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1243082400, now seen corresponding path program 6 times [2022-07-21 09:16:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:25,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275510976] [2022-07-21 09:16:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:25,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:25,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275510976] [2022-07-21 09:16:25,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275510976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:25,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:25,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43371638] [2022-07-21 09:16:25,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:25,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:25,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:25,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:25,415 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:25,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 88 transitions, 490 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:25,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:25,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:25,607 INFO L129 PetriNetUnfolder]: 18/317 cut-off events. [2022-07-21 09:16:25,607 INFO L130 PetriNetUnfolder]: For 824/831 co-relation queries the response was YES. [2022-07-21 09:16:25,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 317 events. 18/317 cut-off events. For 824/831 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1770 event pairs, 4 based on Foata normal form. 4/315 useless extension candidates. Maximal degree in co-relation 865. Up to 87 conditions per place. [2022-07-21 09:16:25,609 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 50 selfloop transitions, 8 changer transitions 11/113 dead transitions. [2022-07-21 09:16:25,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 113 transitions, 803 flow [2022-07-21 09:16:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 592 transitions. [2022-07-21 09:16:25,611 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7308641975308642 [2022-07-21 09:16:25,611 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 592 transitions. [2022-07-21 09:16:25,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 592 transitions. [2022-07-21 09:16:25,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:25,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 592 transitions. [2022-07-21 09:16:25,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.2) internal successors, (592), 10 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:25,614 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:25,614 INFO L186 Difference]: Start difference. First operand has 136 places, 88 transitions, 490 flow. Second operand 10 states and 592 transitions. [2022-07-21 09:16:25,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 113 transitions, 803 flow [2022-07-21 09:16:25,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 113 transitions, 742 flow, removed 22 selfloop flow, removed 9 redundant places. [2022-07-21 09:16:25,620 INFO L242 Difference]: Finished difference. Result has 136 places, 88 transitions, 482 flow [2022-07-21 09:16:25,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=482, PETRI_PLACES=136, PETRI_TRANSITIONS=88} [2022-07-21 09:16:25,621 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 62 predicate places. [2022-07-21 09:16:25,621 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 88 transitions, 482 flow [2022-07-21 09:16:25,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:25,622 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:25,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 09:16:25,622 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:25,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1453765160, now seen corresponding path program 7 times [2022-07-21 09:16:25,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428429091] [2022-07-21 09:16:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428429091] [2022-07-21 09:16:25,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428429091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:25,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:25,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:25,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281335897] [2022-07-21 09:16:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:25,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:25,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:25,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:25,733 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:25,734 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 88 transitions, 482 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:25,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:25,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:25,963 INFO L129 PetriNetUnfolder]: 15/325 cut-off events. [2022-07-21 09:16:25,964 INFO L130 PetriNetUnfolder]: For 775/777 co-relation queries the response was YES. [2022-07-21 09:16:25,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 325 events. 15/325 cut-off events. For 775/777 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1865 event pairs, 6 based on Foata normal form. 3/320 useless extension candidates. Maximal degree in co-relation 852. Up to 57 conditions per place. [2022-07-21 09:16:25,966 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 66 selfloop transitions, 10 changer transitions 7/127 dead transitions. [2022-07-21 09:16:25,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 127 transitions, 862 flow [2022-07-21 09:16:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 610 transitions. [2022-07-21 09:16:25,968 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2022-07-21 09:16:25,968 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 610 transitions. [2022-07-21 09:16:25,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 610 transitions. [2022-07-21 09:16:25,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:25,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 610 transitions. [2022-07-21 09:16:25,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:25,971 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:25,972 INFO L186 Difference]: Start difference. First operand has 136 places, 88 transitions, 482 flow. Second operand 10 states and 610 transitions. [2022-07-21 09:16:25,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 127 transitions, 862 flow [2022-07-21 09:16:25,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 127 transitions, 789 flow, removed 26 selfloop flow, removed 10 redundant places. [2022-07-21 09:16:25,978 INFO L242 Difference]: Finished difference. Result has 138 places, 91 transitions, 534 flow [2022-07-21 09:16:25,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=534, PETRI_PLACES=138, PETRI_TRANSITIONS=91} [2022-07-21 09:16:25,979 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 64 predicate places. [2022-07-21 09:16:25,979 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 91 transitions, 534 flow [2022-07-21 09:16:25,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,979 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:25,979 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:25,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 09:16:25,980 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1774556640, now seen corresponding path program 8 times [2022-07-21 09:16:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:25,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507286021] [2022-07-21 09:16:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:25,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:26,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:26,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507286021] [2022-07-21 09:16:26,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507286021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:26,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:26,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856853204] [2022-07-21 09:16:26,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:26,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:26,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:26,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 91 transitions, 534 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:26,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:26,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:26,333 INFO L129 PetriNetUnfolder]: 14/301 cut-off events. [2022-07-21 09:16:26,333 INFO L130 PetriNetUnfolder]: For 715/717 co-relation queries the response was YES. [2022-07-21 09:16:26,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 301 events. 14/301 cut-off events. For 715/717 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1664 event pairs, 2 based on Foata normal form. 5/301 useless extension candidates. Maximal degree in co-relation 809. Up to 72 conditions per place. [2022-07-21 09:16:26,335 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 37 selfloop transitions, 6 changer transitions 30/117 dead transitions. [2022-07-21 09:16:26,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 117 transitions, 856 flow [2022-07-21 09:16:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:16:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:16:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 865 transitions. [2022-07-21 09:16:26,337 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7119341563786008 [2022-07-21 09:16:26,337 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 865 transitions. [2022-07-21 09:16:26,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 865 transitions. [2022-07-21 09:16:26,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:26,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 865 transitions. [2022-07-21 09:16:26,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 57.666666666666664) internal successors, (865), 15 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,341 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,341 INFO L186 Difference]: Start difference. First operand has 138 places, 91 transitions, 534 flow. Second operand 15 states and 865 transitions. [2022-07-21 09:16:26,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 117 transitions, 856 flow [2022-07-21 09:16:26,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 117 transitions, 820 flow, removed 15 selfloop flow, removed 5 redundant places. [2022-07-21 09:16:26,348 INFO L242 Difference]: Finished difference. Result has 152 places, 82 transitions, 411 flow [2022-07-21 09:16:26,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=411, PETRI_PLACES=152, PETRI_TRANSITIONS=82} [2022-07-21 09:16:26,349 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 78 predicate places. [2022-07-21 09:16:26,349 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 82 transitions, 411 flow [2022-07-21 09:16:26,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,349 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:26,350 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:26,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 09:16:26,350 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash -128760964, now seen corresponding path program 9 times [2022-07-21 09:16:26,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:26,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409754838] [2022-07-21 09:16:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:26,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409754838] [2022-07-21 09:16:26,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409754838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:26,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:26,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:26,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165591466] [2022-07-21 09:16:26,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:26,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:26,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:26,456 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:26,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 82 transitions, 411 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:26,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:26,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:26,667 INFO L129 PetriNetUnfolder]: 11/220 cut-off events. [2022-07-21 09:16:26,668 INFO L130 PetriNetUnfolder]: For 558/563 co-relation queries the response was YES. [2022-07-21 09:16:26,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 220 events. 11/220 cut-off events. For 558/563 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 938 event pairs, 0 based on Foata normal form. 4/217 useless extension candidates. Maximal degree in co-relation 588. Up to 39 conditions per place. [2022-07-21 09:16:26,670 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 39 selfloop transitions, 7 changer transitions 10/100 dead transitions. [2022-07-21 09:16:26,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 100 transitions, 642 flow [2022-07-21 09:16:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2022-07-21 09:16:26,671 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2022-07-21 09:16:26,671 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2022-07-21 09:16:26,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2022-07-21 09:16:26,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:26,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2022-07-21 09:16:26,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:26,676 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:26,676 INFO L186 Difference]: Start difference. First operand has 152 places, 82 transitions, 411 flow. Second operand 10 states and 590 transitions. [2022-07-21 09:16:26,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 100 transitions, 642 flow [2022-07-21 09:16:26,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 100 transitions, 552 flow, removed 38 selfloop flow, removed 17 redundant places. [2022-07-21 09:16:26,681 INFO L242 Difference]: Finished difference. Result has 132 places, 81 transitions, 373 flow [2022-07-21 09:16:26,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=373, PETRI_PLACES=132, PETRI_TRANSITIONS=81} [2022-07-21 09:16:26,682 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 58 predicate places. [2022-07-21 09:16:26,682 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 81 transitions, 373 flow [2022-07-21 09:16:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:26,682 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:26,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:16:26,683 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash -608837740, now seen corresponding path program 10 times [2022-07-21 09:16:26,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:26,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378413288] [2022-07-21 09:16:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:26,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:26,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:26,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378413288] [2022-07-21 09:16:26,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378413288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:26,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:26,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920940927] [2022-07-21 09:16:26,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:26,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:26,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:26,797 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:26,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 81 transitions, 373 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:26,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:26,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:26,986 INFO L129 PetriNetUnfolder]: 9/195 cut-off events. [2022-07-21 09:16:26,986 INFO L130 PetriNetUnfolder]: For 338/341 co-relation queries the response was YES. [2022-07-21 09:16:26,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 195 events. 9/195 cut-off events. For 338/341 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 742 event pairs, 0 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 475. Up to 39 conditions per place. [2022-07-21 09:16:26,988 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 39 selfloop transitions, 4 changer transitions 12/99 dead transitions. [2022-07-21 09:16:26,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 99 transitions, 577 flow [2022-07-21 09:16:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 591 transitions. [2022-07-21 09:16:26,993 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7296296296296296 [2022-07-21 09:16:26,993 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 591 transitions. [2022-07-21 09:16:26,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 591 transitions. [2022-07-21 09:16:26,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:26,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 591 transitions. [2022-07-21 09:16:26,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.1) internal successors, (591), 10 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:26,996 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:26,996 INFO L186 Difference]: Start difference. First operand has 132 places, 81 transitions, 373 flow. Second operand 10 states and 591 transitions. [2022-07-21 09:16:26,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 99 transitions, 577 flow [2022-07-21 09:16:26,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 99 transitions, 515 flow, removed 14 selfloop flow, removed 13 redundant places. [2022-07-21 09:16:27,000 INFO L242 Difference]: Finished difference. Result has 128 places, 78 transitions, 313 flow [2022-07-21 09:16:27,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=313, PETRI_PLACES=128, PETRI_TRANSITIONS=78} [2022-07-21 09:16:27,001 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 54 predicate places. [2022-07-21 09:16:27,001 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 78 transitions, 313 flow [2022-07-21 09:16:27,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,002 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:27,002 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:27,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:16:27,002 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1443359976, now seen corresponding path program 11 times [2022-07-21 09:16:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638338014] [2022-07-21 09:16:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:27,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:27,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:27,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638338014] [2022-07-21 09:16:27,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638338014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:27,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:27,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:27,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222794923] [2022-07-21 09:16:27,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:27,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:27,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:27,112 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:27,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 78 transitions, 313 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:27,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:27,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:27,338 INFO L129 PetriNetUnfolder]: 9/161 cut-off events. [2022-07-21 09:16:27,338 INFO L130 PetriNetUnfolder]: For 226/228 co-relation queries the response was YES. [2022-07-21 09:16:27,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 161 events. 9/161 cut-off events. For 226/228 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 520 event pairs, 4 based on Foata normal form. 4/160 useless extension candidates. Maximal degree in co-relation 382. Up to 26 conditions per place. [2022-07-21 09:16:27,339 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 24 selfloop transitions, 1 changer transitions 30/97 dead transitions. [2022-07-21 09:16:27,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 97 transitions, 514 flow [2022-07-21 09:16:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:16:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:16:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 918 transitions. [2022-07-21 09:16:27,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2022-07-21 09:16:27,342 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 918 transitions. [2022-07-21 09:16:27,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 918 transitions. [2022-07-21 09:16:27,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:27,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 918 transitions. [2022-07-21 09:16:27,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.375) internal successors, (918), 16 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,346 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,346 INFO L186 Difference]: Start difference. First operand has 128 places, 78 transitions, 313 flow. Second operand 16 states and 918 transitions. [2022-07-21 09:16:27,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 97 transitions, 514 flow [2022-07-21 09:16:27,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 97 transitions, 463 flow, removed 14 selfloop flow, removed 13 redundant places. [2022-07-21 09:16:27,349 INFO L242 Difference]: Finished difference. Result has 129 places, 65 transitions, 186 flow [2022-07-21 09:16:27,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=186, PETRI_PLACES=129, PETRI_TRANSITIONS=65} [2022-07-21 09:16:27,350 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 55 predicate places. [2022-07-21 09:16:27,350 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 65 transitions, 186 flow [2022-07-21 09:16:27,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,351 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:27,351 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:27,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 09:16:27,351 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash 451166386, now seen corresponding path program 12 times [2022-07-21 09:16:27,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:27,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678166144] [2022-07-21 09:16:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:27,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:27,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:27,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678166144] [2022-07-21 09:16:27,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678166144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:27,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:27,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319935403] [2022-07-21 09:16:27,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:27,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:27,477 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:27,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 65 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:27,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:27,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:27,650 INFO L129 PetriNetUnfolder]: 7/128 cut-off events. [2022-07-21 09:16:27,651 INFO L130 PetriNetUnfolder]: For 115/116 co-relation queries the response was YES. [2022-07-21 09:16:27,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 128 events. 7/128 cut-off events. For 115/116 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 287 event pairs, 0 based on Foata normal form. 2/129 useless extension candidates. Maximal degree in co-relation 280. Up to 17 conditions per place. [2022-07-21 09:16:27,652 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 30 selfloop transitions, 5 changer transitions 6/83 dead transitions. [2022-07-21 09:16:27,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 83 transitions, 365 flow [2022-07-21 09:16:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 582 transitions. [2022-07-21 09:16:27,653 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7185185185185186 [2022-07-21 09:16:27,653 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 582 transitions. [2022-07-21 09:16:27,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 582 transitions. [2022-07-21 09:16:27,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:27,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 582 transitions. [2022-07-21 09:16:27,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.2) internal successors, (582), 10 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:27,656 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:27,656 INFO L186 Difference]: Start difference. First operand has 129 places, 65 transitions, 186 flow. Second operand 10 states and 582 transitions. [2022-07-21 09:16:27,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 83 transitions, 365 flow [2022-07-21 09:16:27,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 288 flow, removed 34 selfloop flow, removed 18 redundant places. [2022-07-21 09:16:27,658 INFO L242 Difference]: Finished difference. Result has 97 places, 67 transitions, 189 flow [2022-07-21 09:16:27,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=189, PETRI_PLACES=97, PETRI_TRANSITIONS=67} [2022-07-21 09:16:27,659 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2022-07-21 09:16:27,659 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 67 transitions, 189 flow [2022-07-21 09:16:27,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:27,660 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:27,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 09:16:27,660 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1759837642, now seen corresponding path program 13 times [2022-07-21 09:16:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:27,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586394418] [2022-07-21 09:16:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:27,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:27,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586394418] [2022-07-21 09:16:27,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586394418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:27,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:27,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:27,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149143865] [2022-07-21 09:16:27,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:27,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:27,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:27,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:27,774 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:27,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 67 transitions, 189 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:27,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:27,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:27,958 INFO L129 PetriNetUnfolder]: 5/130 cut-off events. [2022-07-21 09:16:27,958 INFO L130 PetriNetUnfolder]: For 51/52 co-relation queries the response was YES. [2022-07-21 09:16:27,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 130 events. 5/130 cut-off events. For 51/52 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 318 event pairs, 0 based on Foata normal form. 1/129 useless extension candidates. Maximal degree in co-relation 264. Up to 21 conditions per place. [2022-07-21 09:16:27,959 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 25 selfloop transitions, 5 changer transitions 11/83 dead transitions. [2022-07-21 09:16:27,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 83 transitions, 358 flow [2022-07-21 09:16:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 579 transitions. [2022-07-21 09:16:27,964 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7148148148148148 [2022-07-21 09:16:27,964 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 579 transitions. [2022-07-21 09:16:27,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 579 transitions. [2022-07-21 09:16:27,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:27,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 579 transitions. [2022-07-21 09:16:27,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.9) internal successors, (579), 10 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:27,967 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:27,967 INFO L186 Difference]: Start difference. First operand has 97 places, 67 transitions, 189 flow. Second operand 10 states and 579 transitions. [2022-07-21 09:16:27,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 83 transitions, 358 flow [2022-07-21 09:16:27,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 83 transitions, 336 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-07-21 09:16:27,972 INFO L242 Difference]: Finished difference. Result has 103 places, 67 transitions, 201 flow [2022-07-21 09:16:27,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=201, PETRI_PLACES=103, PETRI_TRANSITIONS=67} [2022-07-21 09:16:27,972 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 29 predicate places. [2022-07-21 09:16:27,972 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 67 transitions, 201 flow [2022-07-21 09:16:27,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:27,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:27,973 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:27,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 09:16:27,973 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:27,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:27,974 INFO L85 PathProgramCache]: Analyzing trace with hash 425023720, now seen corresponding path program 14 times [2022-07-21 09:16:27,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:27,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798380761] [2022-07-21 09:16:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:27,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:28,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:28,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798380761] [2022-07-21 09:16:28,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798380761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:28,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:28,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:28,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901301481] [2022-07-21 09:16:28,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:28,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:28,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:28,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:28,098 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:28,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 67 transitions, 201 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:28,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:28,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:28,261 INFO L129 PetriNetUnfolder]: 6/156 cut-off events. [2022-07-21 09:16:28,262 INFO L130 PetriNetUnfolder]: For 119/120 co-relation queries the response was YES. [2022-07-21 09:16:28,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 156 events. 6/156 cut-off events. For 119/120 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 484 event pairs, 3 based on Foata normal form. 2/156 useless extension candidates. Maximal degree in co-relation 340. Up to 20 conditions per place. [2022-07-21 09:16:28,263 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 36 selfloop transitions, 6 changer transitions 7/91 dead transitions. [2022-07-21 09:16:28,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 91 transitions, 414 flow [2022-07-21 09:16:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2022-07-21 09:16:28,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7271604938271605 [2022-07-21 09:16:28,268 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2022-07-21 09:16:28,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2022-07-21 09:16:28,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:28,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2022-07-21 09:16:28,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:28,273 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:28,273 INFO L186 Difference]: Start difference. First operand has 103 places, 67 transitions, 201 flow. Second operand 10 states and 589 transitions. [2022-07-21 09:16:28,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 91 transitions, 414 flow [2022-07-21 09:16:28,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 91 transitions, 369 flow, removed 15 selfloop flow, removed 8 redundant places. [2022-07-21 09:16:28,276 INFO L242 Difference]: Finished difference. Result has 106 places, 70 transitions, 238 flow [2022-07-21 09:16:28,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=238, PETRI_PLACES=106, PETRI_TRANSITIONS=70} [2022-07-21 09:16:28,277 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 32 predicate places. [2022-07-21 09:16:28,277 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 70 transitions, 238 flow [2022-07-21 09:16:28,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,277 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:28,278 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:28,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 09:16:28,278 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash -936834938, now seen corresponding path program 15 times [2022-07-21 09:16:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:28,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173166256] [2022-07-21 09:16:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:28,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:28,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173166256] [2022-07-21 09:16:28,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173166256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:28,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:28,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:28,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205329969] [2022-07-21 09:16:28,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:28,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:28,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:28,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:28,403 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:28,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 70 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:28,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:28,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:28,587 INFO L129 PetriNetUnfolder]: 4/157 cut-off events. [2022-07-21 09:16:28,588 INFO L130 PetriNetUnfolder]: For 137/140 co-relation queries the response was YES. [2022-07-21 09:16:28,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 157 events. 4/157 cut-off events. For 137/140 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 507 event pairs, 3 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 354. Up to 20 conditions per place. [2022-07-21 09:16:28,589 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 30 selfloop transitions, 5 changer transitions 11/88 dead transitions. [2022-07-21 09:16:28,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 88 transitions, 428 flow [2022-07-21 09:16:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 584 transitions. [2022-07-21 09:16:28,590 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7209876543209877 [2022-07-21 09:16:28,590 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 584 transitions. [2022-07-21 09:16:28,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 584 transitions. [2022-07-21 09:16:28,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:28,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 584 transitions. [2022-07-21 09:16:28,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.4) internal successors, (584), 10 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:28,597 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:28,597 INFO L186 Difference]: Start difference. First operand has 106 places, 70 transitions, 238 flow. Second operand 10 states and 584 transitions. [2022-07-21 09:16:28,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 88 transitions, 428 flow [2022-07-21 09:16:28,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 88 transitions, 403 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-21 09:16:28,600 INFO L242 Difference]: Finished difference. Result has 113 places, 71 transitions, 262 flow [2022-07-21 09:16:28,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=262, PETRI_PLACES=113, PETRI_TRANSITIONS=71} [2022-07-21 09:16:28,601 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2022-07-21 09:16:28,601 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 71 transitions, 262 flow [2022-07-21 09:16:28,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:28,602 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:28,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 09:16:28,602 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2008951810, now seen corresponding path program 16 times [2022-07-21 09:16:28,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:28,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871705071] [2022-07-21 09:16:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:28,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:28,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:28,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871705071] [2022-07-21 09:16:28,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871705071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:28,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:28,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:28,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224936849] [2022-07-21 09:16:28,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:28,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:28,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:28,730 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:28,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 71 transitions, 262 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:28,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:28,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:28,910 INFO L129 PetriNetUnfolder]: 2/170 cut-off events. [2022-07-21 09:16:28,910 INFO L130 PetriNetUnfolder]: For 188/191 co-relation queries the response was YES. [2022-07-21 09:16:28,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 170 events. 2/170 cut-off events. For 188/191 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 603 event pairs, 0 based on Foata normal form. 1/169 useless extension candidates. Maximal degree in co-relation 385. Up to 27 conditions per place. [2022-07-21 09:16:28,911 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 36 selfloop transitions, 8 changer transitions 9/95 dead transitions. [2022-07-21 09:16:28,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 95 transitions, 486 flow [2022-07-21 09:16:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2022-07-21 09:16:28,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2022-07-21 09:16:28,913 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2022-07-21 09:16:28,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2022-07-21 09:16:28,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:28,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2022-07-21 09:16:28,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:28,916 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:28,916 INFO L186 Difference]: Start difference. First operand has 113 places, 71 transitions, 262 flow. Second operand 10 states and 590 transitions. [2022-07-21 09:16:28,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 95 transitions, 486 flow [2022-07-21 09:16:28,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 95 transitions, 454 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-07-21 09:16:28,921 INFO L242 Difference]: Finished difference. Result has 118 places, 74 transitions, 316 flow [2022-07-21 09:16:28,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=316, PETRI_PLACES=118, PETRI_TRANSITIONS=74} [2022-07-21 09:16:28,922 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 44 predicate places. [2022-07-21 09:16:28,922 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 74 transitions, 316 flow [2022-07-21 09:16:28,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:28,923 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:28,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 09:16:28,923 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 635828710, now seen corresponding path program 17 times [2022-07-21 09:16:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:28,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329052426] [2022-07-21 09:16:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:28,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:29,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:29,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329052426] [2022-07-21 09:16:29,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329052426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:29,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:29,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:29,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12224608] [2022-07-21 09:16:29,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:29,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:29,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:29,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:29,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:29,043 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:29,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 74 transitions, 316 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:29,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:29,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:29,231 INFO L129 PetriNetUnfolder]: 2/155 cut-off events. [2022-07-21 09:16:29,231 INFO L130 PetriNetUnfolder]: For 260/269 co-relation queries the response was YES. [2022-07-21 09:16:29,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 155 events. 2/155 cut-off events. For 260/269 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 498 event pairs, 1 based on Foata normal form. 4/156 useless extension candidates. Maximal degree in co-relation 375. Up to 26 conditions per place. [2022-07-21 09:16:29,232 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 31 selfloop transitions, 4 changer transitions 12/89 dead transitions. [2022-07-21 09:16:29,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 89 transitions, 484 flow [2022-07-21 09:16:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 584 transitions. [2022-07-21 09:16:29,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7209876543209877 [2022-07-21 09:16:29,234 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 584 transitions. [2022-07-21 09:16:29,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 584 transitions. [2022-07-21 09:16:29,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:29,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 584 transitions. [2022-07-21 09:16:29,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.4) internal successors, (584), 10 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:29,237 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:29,237 INFO L186 Difference]: Start difference. First operand has 118 places, 74 transitions, 316 flow. Second operand 10 states and 584 transitions. [2022-07-21 09:16:29,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 89 transitions, 484 flow [2022-07-21 09:16:29,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 89 transitions, 454 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-07-21 09:16:29,240 INFO L242 Difference]: Finished difference. Result has 123 places, 71 transitions, 275 flow [2022-07-21 09:16:29,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=275, PETRI_PLACES=123, PETRI_TRANSITIONS=71} [2022-07-21 09:16:29,241 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 49 predicate places. [2022-07-21 09:16:29,241 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 71 transitions, 275 flow [2022-07-21 09:16:29,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:29,242 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:29,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 09:16:29,242 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash 519427062, now seen corresponding path program 18 times [2022-07-21 09:16:29,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:29,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232990420] [2022-07-21 09:16:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:29,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:29,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:29,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232990420] [2022-07-21 09:16:29,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232990420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:29,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:29,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104836115] [2022-07-21 09:16:29,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:29,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:29,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:29,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 71 transitions, 275 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:29,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:29,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:29,512 INFO L129 PetriNetUnfolder]: 2/126 cut-off events. [2022-07-21 09:16:29,512 INFO L130 PetriNetUnfolder]: For 148/155 co-relation queries the response was YES. [2022-07-21 09:16:29,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 126 events. 2/126 cut-off events. For 148/155 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 294 event pairs, 1 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 289. Up to 23 conditions per place. [2022-07-21 09:16:29,513 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 21 selfloop transitions, 3 changer transitions 13/79 dead transitions. [2022-07-21 09:16:29,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 79 transitions, 390 flow [2022-07-21 09:16:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 576 transitions. [2022-07-21 09:16:29,514 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2022-07-21 09:16:29,515 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 576 transitions. [2022-07-21 09:16:29,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 576 transitions. [2022-07-21 09:16:29,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:29,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 576 transitions. [2022-07-21 09:16:29,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.6) internal successors, (576), 10 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:29,517 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:29,518 INFO L186 Difference]: Start difference. First operand has 123 places, 71 transitions, 275 flow. Second operand 10 states and 576 transitions. [2022-07-21 09:16:29,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 79 transitions, 390 flow [2022-07-21 09:16:29,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 79 transitions, 351 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-07-21 09:16:29,521 INFO L242 Difference]: Finished difference. Result has 115 places, 66 transitions, 202 flow [2022-07-21 09:16:29,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=202, PETRI_PLACES=115, PETRI_TRANSITIONS=66} [2022-07-21 09:16:29,521 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2022-07-21 09:16:29,521 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 66 transitions, 202 flow [2022-07-21 09:16:29,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,522 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:29,522 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:29,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 09:16:29,522 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash 263507622, now seen corresponding path program 19 times [2022-07-21 09:16:29,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:29,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220576727] [2022-07-21 09:16:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:29,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:29,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:29,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220576727] [2022-07-21 09:16:29,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220576727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:29,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:29,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:29,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325588699] [2022-07-21 09:16:29,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:29,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:29,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:29,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:29,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 66 transitions, 202 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:29,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:29,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:29,776 INFO L129 PetriNetUnfolder]: 2/91 cut-off events. [2022-07-21 09:16:29,776 INFO L130 PetriNetUnfolder]: For 68/70 co-relation queries the response was YES. [2022-07-21 09:16:29,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 91 events. 2/91 cut-off events. For 68/70 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 191. Up to 11 conditions per place. [2022-07-21 09:16:29,777 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 19 selfloop transitions, 5 changer transitions 9/75 dead transitions. [2022-07-21 09:16:29,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 75 transitions, 318 flow [2022-07-21 09:16:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 573 transitions. [2022-07-21 09:16:29,778 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7074074074074074 [2022-07-21 09:16:29,778 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 573 transitions. [2022-07-21 09:16:29,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 573 transitions. [2022-07-21 09:16:29,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:29,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 573 transitions. [2022-07-21 09:16:29,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:29,781 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:29,781 INFO L186 Difference]: Start difference. First operand has 115 places, 66 transitions, 202 flow. Second operand 10 states and 573 transitions. [2022-07-21 09:16:29,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 75 transitions, 318 flow [2022-07-21 09:16:29,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 75 transitions, 269 flow, removed 14 selfloop flow, removed 16 redundant places. [2022-07-21 09:16:29,783 INFO L242 Difference]: Finished difference. Result has 102 places, 65 transitions, 181 flow [2022-07-21 09:16:29,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=181, PETRI_PLACES=102, PETRI_TRANSITIONS=65} [2022-07-21 09:16:29,785 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2022-07-21 09:16:29,785 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 65 transitions, 181 flow [2022-07-21 09:16:29,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,786 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:29,786 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:29,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 09:16:29,786 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1160016076, now seen corresponding path program 20 times [2022-07-21 09:16:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:29,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956481826] [2022-07-21 09:16:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:29,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:29,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956481826] [2022-07-21 09:16:29,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956481826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:29,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:29,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:16:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639672947] [2022-07-21 09:16:29,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:29,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:16:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:29,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:16:29,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:16:29,891 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-07-21 09:16:29,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 65 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:29,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-07-21 09:16:29,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:30,015 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2022-07-21 09:16:30,015 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-07-21 09:16:30,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 69 events. 2/69 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 135. Up to 11 conditions per place. [2022-07-21 09:16:30,016 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2022-07-21 09:16:30,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 64 transitions, 236 flow [2022-07-21 09:16:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:16:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:16:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 565 transitions. [2022-07-21 09:16:30,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2022-07-21 09:16:30,017 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 565 transitions. [2022-07-21 09:16:30,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 565 transitions. [2022-07-21 09:16:30,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:30,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 565 transitions. [2022-07-21 09:16:30,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:30,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:30,019 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 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) [2022-07-21 09:16:30,019 INFO L186 Difference]: Start difference. First operand has 102 places, 65 transitions, 181 flow. Second operand 10 states and 565 transitions. [2022-07-21 09:16:30,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 64 transitions, 236 flow [2022-07-21 09:16:30,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 64 transitions, 205 flow, removed 5 selfloop flow, removed 11 redundant places. [2022-07-21 09:16:30,020 INFO L242 Difference]: Finished difference. Result has 93 places, 0 transitions, 0 flow [2022-07-21 09:16:30,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=93, PETRI_TRANSITIONS=0} [2022-07-21 09:16:30,022 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2022-07-21 09:16:30,022 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 0 transitions, 0 flow [2022-07-21 09:16:30,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:30,025 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-21 09:16:30,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-21 09:16:30,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-21 09:16:30,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 09:16:30,027 INFO L356 BasicCegarLoop]: Path program histogram: [20, 10] [2022-07-21 09:16:30,030 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-21 09:16:30,030 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 09:16:30,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 09:16:30 BasicIcfg [2022-07-21 09:16:30,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 09:16:30,036 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 09:16:30,036 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 09:16:30,036 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 09:16:30,036 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:16:18" (3/4) ... [2022-07-21 09:16:30,038 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 09:16:30,044 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-07-21 09:16:30,044 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-07-21 09:16:30,048 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-07-21 09:16:30,048 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-21 09:16:30,049 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 09:16:30,049 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 09:16:30,077 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 09:16:30,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 09:16:30,079 INFO L158 Benchmark]: Toolchain (without parser) took 12038.50ms. Allocated memory was 50.3MB in the beginning and 130.0MB in the end (delta: 79.7MB). Free memory was 27.6MB in the beginning and 52.5MB in the end (delta: -24.9MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. [2022-07-21 09:16:30,079 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 50.3MB. Free memory was 31.8MB in the beginning and 31.8MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 09:16:30,079 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.66ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.4MB in the beginning and 44.1MB in the end (delta: -16.6MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2022-07-21 09:16:30,079 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.76ms. Allocated memory is still 60.8MB. Free memory was 44.1MB in the beginning and 42.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 09:16:30,080 INFO L158 Benchmark]: Boogie Preprocessor took 17.97ms. Allocated memory is still 60.8MB. Free memory was 42.6MB in the beginning and 41.6MB in the end (delta: 991.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 09:16:30,080 INFO L158 Benchmark]: RCFGBuilder took 370.23ms. Allocated memory is still 60.8MB. Free memory was 41.4MB in the beginning and 30.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 09:16:30,080 INFO L158 Benchmark]: TraceAbstraction took 11352.51ms. Allocated memory was 60.8MB in the beginning and 130.0MB in the end (delta: 69.2MB). Free memory was 29.7MB in the beginning and 55.6MB in the end (delta: -26.0MB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. [2022-07-21 09:16:30,081 INFO L158 Benchmark]: Witness Printer took 42.18ms. Allocated memory is still 130.0MB. Free memory was 55.6MB in the beginning and 52.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 09:16:30,082 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 50.3MB. Free memory was 31.8MB in the beginning and 31.8MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.66ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.4MB in the beginning and 44.1MB in the end (delta: -16.6MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.76ms. Allocated memory is still 60.8MB. Free memory was 44.1MB in the beginning and 42.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 17.97ms. Allocated memory is still 60.8MB. Free memory was 42.6MB in the beginning and 41.6MB in the end (delta: 991.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 370.23ms. Allocated memory is still 60.8MB. Free memory was 41.4MB in the beginning and 30.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 11352.51ms. Allocated memory was 60.8MB in the beginning and 130.0MB in the end (delta: 69.2MB). Free memory was 29.7MB in the beginning and 55.6MB in the end (delta: -26.0MB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. * Witness Printer took 42.18ms. Allocated memory is still 130.0MB. Free memory was 55.6MB in the beginning and 52.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 101 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.2s, OverallIterations: 30, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1703 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1703 mSDsluCounter, 3790 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4361 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3850 IncrementalHoareTripleChecker+Invalid, 3869 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 686 mSDtfsCounter, 3850 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 517 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=534occurred in iteration=17, InterpolantAutomatonStates: 338, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 1860 NumberOfCodeBlocks, 1860 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1830 ConstructedInterpolants, 0 QuantifiedInterpolants, 12009 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 30 InterpolantComputations, 30 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-21 09:16:30,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE