./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-5.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/unroll-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:18:23,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:18:23,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:18:23,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:18:23,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:18:23,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:18:23,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:18:23,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:18:23,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:18:23,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:18:23,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:18:23,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:18:23,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:18:23,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:18:23,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:18:23,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:18:23,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:18:23,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:18:23,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:18:23,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:18:23,654 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:18:23,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:18:23,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:18:23,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:18:23,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:18:23,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:18:23,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:18:23,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:18:23,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:18:23,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:18:23,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:18:23,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:18:23,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:18:23,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:18:23,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:18:23,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:18:23,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:18:23,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:18:23,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:18:23,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:18:23,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:18:23,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:18:23,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:18:23,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:18:23,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:18:23,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:18:23,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:18:23,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:18:23,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:18:23,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:18:23,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:18:23,723 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:18:23,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:18:23,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:18:23,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:18:23,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:18:23,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:18:23,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:18:23,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:18:23,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:18:23,726 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:18:23,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:18:23,726 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:18:23,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:18:23,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:18:23,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:18:23,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:18:23,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:18:23,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:18:23,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:18:23,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:18:23,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:18:23,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:18:23,729 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:18:23,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:18:23,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:18:23,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e [2022-07-21 09:18:24,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:18:24,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:18:24,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:18:24,076 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:18:24,077 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:18:24,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-5.wvr.c [2022-07-21 09:18:24,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd51d9f5/daf8ea4b6bc94605a6326a1ebba0d46a/FLAG7a96cfe61 [2022-07-21 09:18:24,638 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:18:24,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-5.wvr.c [2022-07-21 09:18:24,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd51d9f5/daf8ea4b6bc94605a6326a1ebba0d46a/FLAG7a96cfe61 [2022-07-21 09:18:25,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd51d9f5/daf8ea4b6bc94605a6326a1ebba0d46a [2022-07-21 09:18:25,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:18:25,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:18:25,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:18:25,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:18:25,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:18:25,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@120824f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25, skipping insertion in model container [2022-07-21 09:18:25,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:18:25,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:18:25,283 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/unroll-5.wvr.c[2644,2657] [2022-07-21 09:18:25,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:18:25,301 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:18:25,323 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/unroll-5.wvr.c[2644,2657] [2022-07-21 09:18:25,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:18:25,339 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:18:25,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25 WrapperNode [2022-07-21 09:18:25,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:18:25,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:18:25,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:18:25,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:18:25,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,384 INFO L137 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 164 [2022-07-21 09:18:25,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:18:25,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:18:25,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:18:25,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:18:25,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:18:25,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:18:25,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:18:25,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:18:25,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (1/1) ... [2022-07-21 09:18:25,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:18:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:25,456 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 09:18:25,458 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 09:18:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:18:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:18:25,486 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:18:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:18:25,486 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:18:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:18:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:18:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:18:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:18:25,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:18:25,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:18:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:18:25,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:18:25,490 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 09:18:25,564 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:18:25,566 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:18:25,858 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:18:25,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:18:25,868 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:18:25,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:18:25 BoogieIcfgContainer [2022-07-21 09:18:25,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:18:25,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:18:25,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:18:25,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:18:25,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:18:25" (1/3) ... [2022-07-21 09:18:25,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18496782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:18:25, skipping insertion in model container [2022-07-21 09:18:25,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:18:25" (2/3) ... [2022-07-21 09:18:25,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18496782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:18:25, skipping insertion in model container [2022-07-21 09:18:25,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:18:25" (3/3) ... [2022-07-21 09:18:25,877 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2022-07-21 09:18:25,882 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:18:25,890 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:18:25,891 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:18:25,891 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:18:25,975 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:18:26,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 213 transitions, 442 flow [2022-07-21 09:18:26,151 INFO L129 PetriNetUnfolder]: 17/211 cut-off events. [2022-07-21 09:18:26,152 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:18:26,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 211 events. 17/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 180 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-07-21 09:18:26,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 213 transitions, 442 flow [2022-07-21 09:18:26,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 202 transitions, 416 flow [2022-07-21 09:18:26,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:18:26,198 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@3477c7af, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ef9b297 [2022-07-21 09:18:26,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:18:26,247 INFO L129 PetriNetUnfolder]: 13/155 cut-off events. [2022-07-21 09:18:26,247 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:18:26,253 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:26,254 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:26,254 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 09:18:26,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:26,259 INFO L85 PathProgramCache]: Analyzing trace with hash 720137412, now seen corresponding path program 1 times [2022-07-21 09:18:26,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:26,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90742842] [2022-07-21 09:18:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:26,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:26,550 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 09:18:26,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:26,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90742842] [2022-07-21 09:18:26,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90742842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:26,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:26,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:18:26,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310256557] [2022-07-21 09:18:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:26,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:18:26,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:26,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:18:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:18:26,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 213 [2022-07-21 09:18:26,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 202 transitions, 416 flow. Second operand has 2 states, 2 states have (on average 196.5) internal successors, (393), 2 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:26,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:26,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 213 [2022-07-21 09:18:26,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:26,680 INFO L129 PetriNetUnfolder]: 3/188 cut-off events. [2022-07-21 09:18:26,680 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 09:18:26,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 188 events. 3/188 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 143 event pairs, 0 based on Foata normal form. 17/191 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-07-21 09:18:26,685 INFO L132 encePairwiseOnDemand]: 199/213 looper letters, 4 selfloop transitions, 0 changer transitions 5/188 dead transitions. [2022-07-21 09:18:26,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 188 transitions, 396 flow [2022-07-21 09:18:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:18:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:18:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 406 transitions. [2022-07-21 09:18:26,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9530516431924883 [2022-07-21 09:18:26,706 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 406 transitions. [2022-07-21 09:18:26,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 406 transitions. [2022-07-21 09:18:26,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:26,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 406 transitions. [2022-07-21 09:18:26,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 203.0) internal successors, (406), 2 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:26,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:26,726 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:26,728 INFO L186 Difference]: Start difference. First operand has 192 places, 202 transitions, 416 flow. Second operand 2 states and 406 transitions. [2022-07-21 09:18:26,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 188 transitions, 396 flow [2022-07-21 09:18:26,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 188 transitions, 388 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:18:26,738 INFO L242 Difference]: Finished difference. Result has 189 places, 183 transitions, 370 flow [2022-07-21 09:18:26,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=370, PETRI_PLACES=189, PETRI_TRANSITIONS=183} [2022-07-21 09:18:26,744 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, -3 predicate places. [2022-07-21 09:18:26,744 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 183 transitions, 370 flow [2022-07-21 09:18:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 196.5) internal successors, (393), 2 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:26,745 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:26,745 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:18:26,746 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 09:18:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:26,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1342985173, now seen corresponding path program 1 times [2022-07-21 09:18:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:26,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711369879] [2022-07-21 09:18:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:27,039 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 09:18:27,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:27,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711369879] [2022-07-21 09:18:27,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711369879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:27,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:27,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:18:27,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360134244] [2022-07-21 09:18:27,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:27,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:18:27,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:18:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:18:27,044 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 213 [2022-07-21 09:18:27,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 183 transitions, 370 flow. Second operand has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:27,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:27,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 213 [2022-07-21 09:18:27,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:27,370 INFO L129 PetriNetUnfolder]: 145/908 cut-off events. [2022-07-21 09:18:27,371 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-07-21 09:18:27,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 908 events. 145/908 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5127 event pairs, 47 based on Foata normal form. 1/844 useless extension candidates. Maximal degree in co-relation 1233. Up to 160 conditions per place. [2022-07-21 09:18:27,378 INFO L132 encePairwiseOnDemand]: 206/213 looper letters, 71 selfloop transitions, 5 changer transitions 4/219 dead transitions. [2022-07-21 09:18:27,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 219 transitions, 607 flow [2022-07-21 09:18:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:18:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:18:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 975 transitions. [2022-07-21 09:18:27,383 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7629107981220657 [2022-07-21 09:18:27,383 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 975 transitions. [2022-07-21 09:18:27,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 975 transitions. [2022-07-21 09:18:27,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:27,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 975 transitions. [2022-07-21 09:18:27,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.5) internal successors, (975), 6 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:27,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:27,392 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:27,392 INFO L186 Difference]: Start difference. First operand has 189 places, 183 transitions, 370 flow. Second operand 6 states and 975 transitions. [2022-07-21 09:18:27,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 219 transitions, 607 flow [2022-07-21 09:18:27,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 219 transitions, 607 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:18:27,401 INFO L242 Difference]: Finished difference. Result has 192 places, 186 transitions, 399 flow [2022-07-21 09:18:27,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=192, PETRI_TRANSITIONS=186} [2022-07-21 09:18:27,402 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 0 predicate places. [2022-07-21 09:18:27,402 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 186 transitions, 399 flow [2022-07-21 09:18:27,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:27,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:27,404 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:27,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:18:27,404 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 09:18:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:27,405 INFO L85 PathProgramCache]: Analyzing trace with hash 390201706, now seen corresponding path program 1 times [2022-07-21 09:18:27,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:27,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480326002] [2022-07-21 09:18:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:27,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:27,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480326002] [2022-07-21 09:18:27,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480326002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832870350] [2022-07-21 09:18:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:27,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:27,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:27,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:18:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:27,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:18:27,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:27,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:27,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832870350] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:27,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:18:27,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-21 09:18:27,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532455615] [2022-07-21 09:18:27,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:27,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:18:27,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:27,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:18:27,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:18:27,954 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 213 [2022-07-21 09:18:27,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 186 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:27,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:27,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 213 [2022-07-21 09:18:27,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:28,110 INFO L129 PetriNetUnfolder]: 129/938 cut-off events. [2022-07-21 09:18:28,111 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-21 09:18:28,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 938 events. 129/938 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4925 event pairs, 8 based on Foata normal form. 0/826 useless extension candidates. Maximal degree in co-relation 1226. Up to 175 conditions per place. [2022-07-21 09:18:28,117 INFO L132 encePairwiseOnDemand]: 208/213 looper letters, 28 selfloop transitions, 5 changer transitions 1/198 dead transitions. [2022-07-21 09:18:28,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 198 transitions, 495 flow [2022-07-21 09:18:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:18:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:18:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2022-07-21 09:18:28,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8673708920187794 [2022-07-21 09:18:28,120 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2022-07-21 09:18:28,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2022-07-21 09:18:28,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:28,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2022-07-21 09:18:28,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,125 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,125 INFO L186 Difference]: Start difference. First operand has 192 places, 186 transitions, 399 flow. Second operand 4 states and 739 transitions. [2022-07-21 09:18:28,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 198 transitions, 495 flow [2022-07-21 09:18:28,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 198 transitions, 491 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:18:28,130 INFO L242 Difference]: Finished difference. Result has 194 places, 190 transitions, 431 flow [2022-07-21 09:18:28,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=431, PETRI_PLACES=194, PETRI_TRANSITIONS=190} [2022-07-21 09:18:28,131 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 2 predicate places. [2022-07-21 09:18:28,131 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 190 transitions, 431 flow [2022-07-21 09:18:28,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,132 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:28,132 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:28,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:28,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:28,357 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 09:18:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1929753824, now seen corresponding path program 2 times [2022-07-21 09:18:28,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:28,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824743801] [2022-07-21 09:18:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:28,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:28,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:28,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824743801] [2022-07-21 09:18:28,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824743801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:28,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:28,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:18:28,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618235573] [2022-07-21 09:18:28,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:28,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:18:28,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:28,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:18:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:18:28,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 213 [2022-07-21 09:18:28,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 190 transitions, 431 flow. Second operand has 4 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:28,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 213 [2022-07-21 09:18:28,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:28,654 INFO L129 PetriNetUnfolder]: 144/1030 cut-off events. [2022-07-21 09:18:28,654 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-21 09:18:28,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1030 events. 144/1030 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 5422 event pairs, 54 based on Foata normal form. 2/969 useless extension candidates. Maximal degree in co-relation 1504. Up to 221 conditions per place. [2022-07-21 09:18:28,660 INFO L132 encePairwiseOnDemand]: 207/213 looper letters, 31 selfloop transitions, 6 changer transitions 0/201 dead transitions. [2022-07-21 09:18:28,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 201 transitions, 546 flow [2022-07-21 09:18:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:18:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:18:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 913 transitions. [2022-07-21 09:18:28,663 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8572769953051643 [2022-07-21 09:18:28,663 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 913 transitions. [2022-07-21 09:18:28,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 913 transitions. [2022-07-21 09:18:28,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:28,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 913 transitions. [2022-07-21 09:18:28,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,669 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,670 INFO L186 Difference]: Start difference. First operand has 194 places, 190 transitions, 431 flow. Second operand 5 states and 913 transitions. [2022-07-21 09:18:28,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 201 transitions, 546 flow [2022-07-21 09:18:28,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 201 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:18:28,674 INFO L242 Difference]: Finished difference. Result has 200 places, 192 transitions, 466 flow [2022-07-21 09:18:28,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=466, PETRI_PLACES=200, PETRI_TRANSITIONS=192} [2022-07-21 09:18:28,676 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 8 predicate places. [2022-07-21 09:18:28,676 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 192 transitions, 466 flow [2022-07-21 09:18:28,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:28,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:28,677 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:28,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:18:28,677 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 09:18:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:28,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1356815304, now seen corresponding path program 3 times [2022-07-21 09:18:28,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:28,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992489583] [2022-07-21 09:18:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:28,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:28,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:28,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992489583] [2022-07-21 09:18:28,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992489583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:28,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003456554] [2022-07-21 09:18:28,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:18:28,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:28,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:28,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:18:28,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-21 09:18:28,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:18:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:29,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:18:29,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003456554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:29,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:18:29,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2022-07-21 09:18:29,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132295942] [2022-07-21 09:18:29,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:29,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:18:29,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:18:29,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:18:29,045 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 213 [2022-07-21 09:18:29,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 192 transitions, 466 flow. Second operand has 8 states, 8 states have (on average 155.125) internal successors, (1241), 8 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:29,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 213 [2022-07-21 09:18:29,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:29,403 INFO L129 PetriNetUnfolder]: 44/714 cut-off events. [2022-07-21 09:18:29,403 INFO L130 PetriNetUnfolder]: For 86/88 co-relation queries the response was YES. [2022-07-21 09:18:29,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 714 events. 44/714 cut-off events. For 86/88 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3109 event pairs, 26 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 963. Up to 110 conditions per place. [2022-07-21 09:18:29,407 INFO L132 encePairwiseOnDemand]: 201/213 looper letters, 35 selfloop transitions, 11 changer transitions 0/196 dead transitions. [2022-07-21 09:18:29,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 196 transitions, 566 flow [2022-07-21 09:18:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:18:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:18:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1708 transitions. [2022-07-21 09:18:29,412 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7289799402475459 [2022-07-21 09:18:29,412 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1708 transitions. [2022-07-21 09:18:29,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1708 transitions. [2022-07-21 09:18:29,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:29,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1708 transitions. [2022-07-21 09:18:29,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 213.0) internal successors, (2556), 12 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,421 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 213.0) internal successors, (2556), 12 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,422 INFO L186 Difference]: Start difference. First operand has 200 places, 192 transitions, 466 flow. Second operand 11 states and 1708 transitions. [2022-07-21 09:18:29,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 196 transitions, 566 flow [2022-07-21 09:18:29,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 196 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:18:29,426 INFO L242 Difference]: Finished difference. Result has 209 places, 193 transitions, 489 flow [2022-07-21 09:18:29,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=489, PETRI_PLACES=209, PETRI_TRANSITIONS=193} [2022-07-21 09:18:29,428 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 17 predicate places. [2022-07-21 09:18:29,428 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 193 transitions, 489 flow [2022-07-21 09:18:29,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 155.125) internal successors, (1241), 8 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,429 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:29,429 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:29,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:29,654 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 09:18:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash -463950498, now seen corresponding path program 1 times [2022-07-21 09:18:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:29,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200457817] [2022-07-21 09:18:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:29,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:29,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200457817] [2022-07-21 09:18:29,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200457817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:29,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:29,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:18:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416584443] [2022-07-21 09:18:29,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:18:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:18:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:18:29,741 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 213 [2022-07-21 09:18:29,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 193 transitions, 489 flow. Second operand has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:29,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 213 [2022-07-21 09:18:29,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:29,962 INFO L129 PetriNetUnfolder]: 222/1393 cut-off events. [2022-07-21 09:18:29,962 INFO L130 PetriNetUnfolder]: For 485/486 co-relation queries the response was YES. [2022-07-21 09:18:29,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2265 conditions, 1393 events. 222/1393 cut-off events. For 485/486 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 8255 event pairs, 74 based on Foata normal form. 4/1309 useless extension candidates. Maximal degree in co-relation 2253. Up to 234 conditions per place. [2022-07-21 09:18:29,972 INFO L132 encePairwiseOnDemand]: 205/213 looper letters, 59 selfloop transitions, 10 changer transitions 2/233 dead transitions. [2022-07-21 09:18:29,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 233 transitions, 793 flow [2022-07-21 09:18:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:18:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:18:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 927 transitions. [2022-07-21 09:18:29,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8704225352112676 [2022-07-21 09:18:29,975 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 927 transitions. [2022-07-21 09:18:29,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 927 transitions. [2022-07-21 09:18:29,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:29,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 927 transitions. [2022-07-21 09:18:29,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.4) internal successors, (927), 5 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,980 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,980 INFO L186 Difference]: Start difference. First operand has 209 places, 193 transitions, 489 flow. Second operand 5 states and 927 transitions. [2022-07-21 09:18:29,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 233 transitions, 793 flow [2022-07-21 09:18:29,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 233 transitions, 773 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-21 09:18:29,986 INFO L242 Difference]: Finished difference. Result has 207 places, 202 transitions, 569 flow [2022-07-21 09:18:29,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=569, PETRI_PLACES=207, PETRI_TRANSITIONS=202} [2022-07-21 09:18:29,987 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 15 predicate places. [2022-07-21 09:18:29,988 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 202 transitions, 569 flow [2022-07-21 09:18:29,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:29,988 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:29,988 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:18:29,989 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 09:18:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1423408680, now seen corresponding path program 2 times [2022-07-21 09:18:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:29,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546121137] [2022-07-21 09:18:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:30,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:30,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546121137] [2022-07-21 09:18:30,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546121137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614317712] [2022-07-21 09:18:30,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:18:30,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:30,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:30,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:30,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:18:30,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:18:30,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:18:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:30,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:30,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614317712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:30,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:30,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-21 09:18:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378768081] [2022-07-21 09:18:30,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:30,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:18:30,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:18:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:18:30,441 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 213 [2022-07-21 09:18:30,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 202 transitions, 569 flow. Second operand has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:30,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:30,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 213 [2022-07-21 09:18:30,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:30,695 INFO L129 PetriNetUnfolder]: 219/1468 cut-off events. [2022-07-21 09:18:30,695 INFO L130 PetriNetUnfolder]: For 793/793 co-relation queries the response was YES. [2022-07-21 09:18:30,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2515 conditions, 1468 events. 219/1468 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 8867 event pairs, 87 based on Foata normal form. 9/1386 useless extension candidates. Maximal degree in co-relation 2500. Up to 284 conditions per place. [2022-07-21 09:18:30,706 INFO L132 encePairwiseOnDemand]: 205/213 looper letters, 52 selfloop transitions, 20 changer transitions 4/238 dead transitions. [2022-07-21 09:18:30,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 238 transitions, 887 flow [2022-07-21 09:18:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:18:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:18:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1276 transitions. [2022-07-21 09:18:30,709 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8558014755197854 [2022-07-21 09:18:30,710 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1276 transitions. [2022-07-21 09:18:30,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1276 transitions. [2022-07-21 09:18:30,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:30,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1276 transitions. [2022-07-21 09:18:30,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:30,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:30,731 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:30,731 INFO L186 Difference]: Start difference. First operand has 207 places, 202 transitions, 569 flow. Second operand 7 states and 1276 transitions. [2022-07-21 09:18:30,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 238 transitions, 887 flow [2022-07-21 09:18:30,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 238 transitions, 877 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-07-21 09:18:30,737 INFO L242 Difference]: Finished difference. Result has 218 places, 210 transitions, 710 flow [2022-07-21 09:18:30,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=218, PETRI_TRANSITIONS=210} [2022-07-21 09:18:30,739 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 26 predicate places. [2022-07-21 09:18:30,739 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 210 transitions, 710 flow [2022-07-21 09:18:30,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:30,740 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:30,740 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:30,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:30,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:30,956 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 09:18:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:30,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1110356942, now seen corresponding path program 1 times [2022-07-21 09:18:30,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890583440] [2022-07-21 09:18:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:30,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:31,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:31,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890583440] [2022-07-21 09:18:31,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890583440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:31,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:31,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:18:31,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613216987] [2022-07-21 09:18:31,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:31,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:18:31,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:18:31,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:18:31,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 213 [2022-07-21 09:18:31,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 210 transitions, 710 flow. Second operand has 6 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:31,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 213 [2022-07-21 09:18:31,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:31,449 INFO L129 PetriNetUnfolder]: 259/1806 cut-off events. [2022-07-21 09:18:31,449 INFO L130 PetriNetUnfolder]: For 1666/1666 co-relation queries the response was YES. [2022-07-21 09:18:31,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3286 conditions, 1806 events. 259/1806 cut-off events. For 1666/1666 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 11937 event pairs, 55 based on Foata normal form. 12/1704 useless extension candidates. Maximal degree in co-relation 3266. Up to 317 conditions per place. [2022-07-21 09:18:31,462 INFO L132 encePairwiseOnDemand]: 206/213 looper letters, 62 selfloop transitions, 18 changer transitions 0/242 dead transitions. [2022-07-21 09:18:31,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 242 transitions, 1015 flow [2022-07-21 09:18:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:18:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:18:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1277 transitions. [2022-07-21 09:18:31,465 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8564721663313213 [2022-07-21 09:18:31,465 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1277 transitions. [2022-07-21 09:18:31,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1277 transitions. [2022-07-21 09:18:31,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:31,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1277 transitions. [2022-07-21 09:18:31,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.42857142857142) internal successors, (1277), 7 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,472 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,473 INFO L186 Difference]: Start difference. First operand has 218 places, 210 transitions, 710 flow. Second operand 7 states and 1277 transitions. [2022-07-21 09:18:31,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 242 transitions, 1015 flow [2022-07-21 09:18:31,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 242 transitions, 987 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-07-21 09:18:31,480 INFO L242 Difference]: Finished difference. Result has 224 places, 214 transitions, 781 flow [2022-07-21 09:18:31,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=781, PETRI_PLACES=224, PETRI_TRANSITIONS=214} [2022-07-21 09:18:31,484 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 32 predicate places. [2022-07-21 09:18:31,484 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 214 transitions, 781 flow [2022-07-21 09:18:31,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,485 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:31,485 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:31,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:18:31,485 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 09:18:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash 627297006, now seen corresponding path program 2 times [2022-07-21 09:18:31,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:31,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949424123] [2022-07-21 09:18:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:31,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949424123] [2022-07-21 09:18:31,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949424123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:31,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:31,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:18:31,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106971330] [2022-07-21 09:18:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:31,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:18:31,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:18:31,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:18:31,589 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 213 [2022-07-21 09:18:31,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 214 transitions, 781 flow. Second operand has 4 states, 4 states have (on average 186.75) internal successors, (747), 4 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:31,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 213 [2022-07-21 09:18:31,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:31,764 INFO L129 PetriNetUnfolder]: 87/1068 cut-off events. [2022-07-21 09:18:31,764 INFO L130 PetriNetUnfolder]: For 1155/1168 co-relation queries the response was YES. [2022-07-21 09:18:31,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1845 conditions, 1068 events. 87/1068 cut-off events. For 1155/1168 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5771 event pairs, 21 based on Foata normal form. 17/1010 useless extension candidates. Maximal degree in co-relation 1822. Up to 94 conditions per place. [2022-07-21 09:18:31,773 INFO L132 encePairwiseOnDemand]: 207/213 looper letters, 31 selfloop transitions, 13 changer transitions 1/225 dead transitions. [2022-07-21 09:18:31,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 225 transitions, 928 flow [2022-07-21 09:18:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:18:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:18:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 946 transitions. [2022-07-21 09:18:31,776 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.888262910798122 [2022-07-21 09:18:31,776 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 946 transitions. [2022-07-21 09:18:31,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 946 transitions. [2022-07-21 09:18:31,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:31,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 946 transitions. [2022-07-21 09:18:31,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,782 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,782 INFO L186 Difference]: Start difference. First operand has 224 places, 214 transitions, 781 flow. Second operand 5 states and 946 transitions. [2022-07-21 09:18:31,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 225 transitions, 928 flow [2022-07-21 09:18:31,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 225 transitions, 893 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-21 09:18:31,789 INFO L242 Difference]: Finished difference. Result has 227 places, 215 transitions, 802 flow [2022-07-21 09:18:31,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=802, PETRI_PLACES=227, PETRI_TRANSITIONS=215} [2022-07-21 09:18:31,791 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 35 predicate places. [2022-07-21 09:18:31,791 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 215 transitions, 802 flow [2022-07-21 09:18:31,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.75) internal successors, (747), 4 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,792 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:31,792 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:31,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:18:31,792 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 09:18:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1537540866, now seen corresponding path program 3 times [2022-07-21 09:18:31,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:31,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375942480] [2022-07-21 09:18:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:31,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:31,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:31,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375942480] [2022-07-21 09:18:31,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375942480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:31,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:31,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:18:31,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575816570] [2022-07-21 09:18:31,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:31,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:18:31,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:18:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:18:31,913 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 213 [2022-07-21 09:18:31,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 215 transitions, 802 flow. Second operand has 6 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:31,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:31,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 213 [2022-07-21 09:18:31,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:32,213 INFO L129 PetriNetUnfolder]: 238/1654 cut-off events. [2022-07-21 09:18:32,213 INFO L130 PetriNetUnfolder]: For 2256/2256 co-relation queries the response was YES. [2022-07-21 09:18:32,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3197 conditions, 1654 events. 238/1654 cut-off events. For 2256/2256 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 9952 event pairs, 73 based on Foata normal form. 12/1563 useless extension candidates. Maximal degree in co-relation 3174. Up to 246 conditions per place. [2022-07-21 09:18:32,228 INFO L132 encePairwiseOnDemand]: 206/213 looper letters, 67 selfloop transitions, 20 changer transitions 4/253 dead transitions. [2022-07-21 09:18:32,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 253 transitions, 1144 flow [2022-07-21 09:18:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:18:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:18:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1108 transitions. [2022-07-21 09:18:32,232 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.86697965571205 [2022-07-21 09:18:32,232 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1108 transitions. [2022-07-21 09:18:32,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1108 transitions. [2022-07-21 09:18:32,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:32,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1108 transitions. [2022-07-21 09:18:32,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.66666666666666) internal successors, (1108), 6 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:32,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:32,238 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:32,238 INFO L186 Difference]: Start difference. First operand has 227 places, 215 transitions, 802 flow. Second operand 6 states and 1108 transitions. [2022-07-21 09:18:32,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 253 transitions, 1144 flow [2022-07-21 09:18:32,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 253 transitions, 1118 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-21 09:18:32,248 INFO L242 Difference]: Finished difference. Result has 231 places, 216 transitions, 836 flow [2022-07-21 09:18:32,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=836, PETRI_PLACES=231, PETRI_TRANSITIONS=216} [2022-07-21 09:18:32,249 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 39 predicate places. [2022-07-21 09:18:32,249 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 216 transitions, 836 flow [2022-07-21 09:18:32,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:32,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:32,250 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:18:32,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:18:32,251 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 09:18:32,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash 748042741, now seen corresponding path program 1 times [2022-07-21 09:18:32,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:32,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72377235] [2022-07-21 09:18:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:32,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:32,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:32,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72377235] [2022-07-21 09:18:32,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72377235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:32,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915093842] [2022-07-21 09:18:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:32,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:32,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:32,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:18:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 09:18:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:32,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:18:32,816 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:18:32,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:18:33,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 09:18:33,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:18:33,794 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:18:33,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-21 09:18:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:34,880 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:18:34,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2022-07-21 09:18:34,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-21 09:18:36,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:18:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:36,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915093842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:36,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:36,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 25, 25] total 50 [2022-07-21 09:18:36,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493732660] [2022-07-21 09:18:36,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:36,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 09:18:36,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 09:18:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2276, Unknown=14, NotChecked=0, Total=2450 [2022-07-21 09:18:36,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 213 [2022-07-21 09:18:36,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 216 transitions, 836 flow. Second operand has 50 states, 50 states have (on average 86.72) internal successors, (4336), 50 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:36,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:36,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 213 [2022-07-21 09:18:36,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:49,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:00,925 INFO L129 PetriNetUnfolder]: 10893/24056 cut-off events. [2022-07-21 09:19:00,926 INFO L130 PetriNetUnfolder]: For 30461/30738 co-relation queries the response was YES. [2022-07-21 09:19:01,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56452 conditions, 24056 events. 10893/24056 cut-off events. For 30461/30738 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 219250 event pairs, 520 based on Foata normal form. 620/23330 useless extension candidates. Maximal degree in co-relation 56428. Up to 3712 conditions per place. [2022-07-21 09:19:01,206 INFO L132 encePairwiseOnDemand]: 149/213 looper letters, 1019 selfloop transitions, 391 changer transitions 273/1764 dead transitions. [2022-07-21 09:19:01,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1764 transitions, 8939 flow [2022-07-21 09:19:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-07-21 09:19:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2022-07-21 09:19:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 14262 transitions. [2022-07-21 09:19:01,237 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42921632358252076 [2022-07-21 09:19:01,237 INFO L72 ComplementDD]: Start complementDD. Operand 156 states and 14262 transitions. [2022-07-21 09:19:01,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 156 states and 14262 transitions. [2022-07-21 09:19:01,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:01,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 156 states and 14262 transitions. [2022-07-21 09:19:01,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 157 states, 156 states have (on average 91.42307692307692) internal successors, (14262), 156 states have internal predecessors, (14262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:01,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 157 states, 157 states have (on average 213.0) internal successors, (33441), 157 states have internal predecessors, (33441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:01,348 INFO L81 ComplementDD]: Finished complementDD. Result has 157 states, 157 states have (on average 213.0) internal successors, (33441), 157 states have internal predecessors, (33441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:01,349 INFO L186 Difference]: Start difference. First operand has 231 places, 216 transitions, 836 flow. Second operand 156 states and 14262 transitions. [2022-07-21 09:19:01,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1764 transitions, 8939 flow [2022-07-21 09:19:01,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1764 transitions, 8702 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-07-21 09:19:01,411 INFO L242 Difference]: Finished difference. Result has 471 places, 568 transitions, 4010 flow [2022-07-21 09:19:01,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=156, PETRI_FLOW=4010, PETRI_PLACES=471, PETRI_TRANSITIONS=568} [2022-07-21 09:19:01,412 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 279 predicate places. [2022-07-21 09:19:01,413 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 568 transitions, 4010 flow [2022-07-21 09:19:01,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 86.72) internal successors, (4336), 50 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:01,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:01,414 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:19:01,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:01,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:01,640 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 09:19:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1449282348, now seen corresponding path program 2 times [2022-07-21 09:19:01,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264365374] [2022-07-21 09:19:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:01,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:19:11,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:11,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264365374] [2022-07-21 09:19:11,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264365374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:11,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723845292] [2022-07-21 09:19:11,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:19:11,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:11,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:11,664 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:11,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:19:11,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:19:11,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 09:19:11,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:17,217 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:19:17,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-21 09:19:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:19:17,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:18,633 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:19:18,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 09:19:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:19:19,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723845292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:19,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:19,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 55 [2022-07-21 09:19:19,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067142698] [2022-07-21 09:19:19,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:19,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-21 09:19:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-21 09:19:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2762, Unknown=3, NotChecked=0, Total=2970 [2022-07-21 09:19:19,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 213 [2022-07-21 09:19:19,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 568 transitions, 4010 flow. Second operand has 55 states, 55 states have (on average 81.32727272727273) internal successors, (4473), 55 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:19,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:19,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 213 [2022-07-21 09:19:19,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:38,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:44,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:56,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:59,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:20:15,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:21:37,050 INFO L129 PetriNetUnfolder]: 53291/98904 cut-off events. [2022-07-21 09:21:37,050 INFO L130 PetriNetUnfolder]: For 908120/908128 co-relation queries the response was YES. [2022-07-21 09:21:39,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 406493 conditions, 98904 events. 53291/98904 cut-off events. For 908120/908128 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 923569 event pairs, 5140 based on Foata normal form. 10/96404 useless extension candidates. Maximal degree in co-relation 406380. Up to 17405 conditions per place. [2022-07-21 09:21:40,259 INFO L132 encePairwiseOnDemand]: 146/213 looper letters, 4291 selfloop transitions, 1172 changer transitions 354/5886 dead transitions. [2022-07-21 09:21:40,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 5886 transitions, 63872 flow [2022-07-21 09:21:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2022-07-21 09:21:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2022-07-21 09:21:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 25977 transitions. [2022-07-21 09:21:40,305 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42346439749608766 [2022-07-21 09:21:40,305 INFO L72 ComplementDD]: Start complementDD. Operand 288 states and 25977 transitions. [2022-07-21 09:21:40,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 288 states and 25977 transitions. [2022-07-21 09:21:40,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:40,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 288 states and 25977 transitions. [2022-07-21 09:21:40,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 289 states, 288 states have (on average 90.19791666666667) internal successors, (25977), 288 states have internal predecessors, (25977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:40,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 289 states, 289 states have (on average 213.0) internal successors, (61557), 289 states have internal predecessors, (61557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:40,466 INFO L81 ComplementDD]: Finished complementDD. Result has 289 states, 289 states have (on average 213.0) internal successors, (61557), 289 states have internal predecessors, (61557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:40,467 INFO L186 Difference]: Start difference. First operand has 471 places, 568 transitions, 4010 flow. Second operand 288 states and 25977 transitions. [2022-07-21 09:21:40,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 5886 transitions, 63872 flow [2022-07-21 09:21:45,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 5886 transitions, 62374 flow, removed 641 selfloop flow, removed 24 redundant places. [2022-07-21 09:21:45,227 INFO L242 Difference]: Finished difference. Result has 908 places, 1845 transitions, 18847 flow [2022-07-21 09:21:45,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=288, PETRI_FLOW=18847, PETRI_PLACES=908, PETRI_TRANSITIONS=1845} [2022-07-21 09:21:45,229 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 716 predicate places. [2022-07-21 09:21:45,229 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 1845 transitions, 18847 flow [2022-07-21 09:21:45,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 81.32727272727273) internal successors, (4473), 55 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:45,230 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:45,230 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:21:45,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:45,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 09:21:45,444 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 09:21:45,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:45,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1713828176, now seen corresponding path program 3 times [2022-07-21 09:21:45,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:45,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208341025] [2022-07-21 09:21:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:45,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:21:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208341025] [2022-07-21 09:21:45,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208341025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516157997] [2022-07-21 09:21:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:21:45,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:45,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:45,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:21:46,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:21:46,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:21:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:21:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:47,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:21:47,172 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:21:47,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-07-21 09:21:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:47,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:47,570 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:21:47,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 09:21:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:48,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516157997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:48,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:48,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 25, 20] total 49 [2022-07-21 09:21:48,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204546350] [2022-07-21 09:21:48,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:48,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 09:21:48,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 09:21:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 09:21:48,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 213 [2022-07-21 09:21:48,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 1845 transitions, 18847 flow. Second operand has 49 states, 49 states have (on average 91.04081632653062) internal successors, (4461), 49 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:48,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:48,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 213 [2022-07-21 09:21:48,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand