./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/parallel-misc-2.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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:44:19,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:44:19,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:44:19,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:44:19,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:44:19,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:44:19,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:44:19,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:44:19,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:44:19,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:44:19,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:44:19,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:44:19,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:44:19,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:44:19,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:44:19,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:44:19,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:44:19,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:44:19,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:44:19,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:44:19,665 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:44:19,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:44:19,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:44:19,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:44:19,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:44:19,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:44:19,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:44:19,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:44:19,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:44:19,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:44:19,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:44:19,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:44:19,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:44:19,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:44:19,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:44:19,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:44:19,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:44:19,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:44:19,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:44:19,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:44:19,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:44:19,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:44:19,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:44:19,724 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:44:19,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:44:19,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:44:19,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:44:19,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:44:19,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:44:19,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:44:19,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:44:19,727 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:44:19,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:44:19,728 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:44:19,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:44:19,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:44:19,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:44:19,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:44:19,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:44:19,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:44:19,729 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:44:19,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:44:19,731 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:44:19,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:44:19,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:44:19,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:44:19,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:44:19,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:44:19,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:44:19,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:44:19,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:44:19,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:44:19,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:44:19,733 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:44:19,733 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:44:19,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:44:19,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2022-07-22 21:44:20,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:44:20,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:44:20,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:44:20,034 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:44:20,035 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:44:20,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2022-07-22 21:44:20,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c969156eb/06d3be65dafe41c7a54e9e5d10b5616f/FLAG8af6100de [2022-07-22 21:44:20,585 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:44:20,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2022-07-22 21:44:20,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c969156eb/06d3be65dafe41c7a54e9e5d10b5616f/FLAG8af6100de [2022-07-22 21:44:20,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c969156eb/06d3be65dafe41c7a54e9e5d10b5616f [2022-07-22 21:44:20,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:44:20,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:44:20,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:44:20,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:44:20,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:44:20,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b2dc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20, skipping insertion in model container [2022-07-22 21:44:20,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:44:20,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:44:20,849 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/parallel-misc-2.wvr.c[2554,2567] [2022-07-22 21:44:20,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:44:20,862 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:44:20,884 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/parallel-misc-2.wvr.c[2554,2567] [2022-07-22 21:44:20,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:44:20,896 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:44:20,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20 WrapperNode [2022-07-22 21:44:20,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:44:20,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:44:20,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:44:20,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:44:20,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,946 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-07-22 21:44:20,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:44:20,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:44:20,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:44:20,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:44:20,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:20,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:44:20,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:44:20,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:44:20,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:44:20,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (1/1) ... [2022-07-22 21:44:21,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:44:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:21,024 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) [2022-07-22 21:44:21,042 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 [2022-07-22 21:44:21,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:44:21,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:44:21,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:44:21,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:44:21,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:44:21,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:44:21,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:44:21,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:44:21,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:44:21,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:44:21,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:44:21,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:44:21,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:44:21,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:44:21,090 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:44:21,201 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:44:21,203 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:44:21,447 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:44:21,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:44:21,465 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:44:21,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:44:21 BoogieIcfgContainer [2022-07-22 21:44:21,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:44:21,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:44:21,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:44:21,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:44:21,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:44:20" (1/3) ... [2022-07-22 21:44:21,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e577425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:44:21, skipping insertion in model container [2022-07-22 21:44:21,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:44:20" (2/3) ... [2022-07-22 21:44:21,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e577425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:44:21, skipping insertion in model container [2022-07-22 21:44:21,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:44:21" (3/3) ... [2022-07-22 21:44:21,490 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2022-07-22 21:44:21,495 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:44:21,503 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:44:21,519 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:44:21,519 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:44:21,572 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:44:21,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2022-07-22 21:44:21,694 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2022-07-22 21:44:21,695 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:44:21,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-07-22 21:44:21,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2022-07-22 21:44:21,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2022-07-22 21:44:21,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:44:21,731 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@1b0d763d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c2ce2e7 [2022-07-22 21:44:21,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:44:21,760 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2022-07-22 21:44:21,760 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:44:21,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:21,761 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] [2022-07-22 21:44:21,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash -669652547, now seen corresponding path program 1 times [2022-07-22 21:44:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:21,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662980668] [2022-07-22 21:44:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:21,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:22,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:22,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662980668] [2022-07-22 21:44:22,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662980668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:22,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:22,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:44:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026469070] [2022-07-22 21:44:22,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:22,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:44:22,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:44:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:44:22,100 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 104 [2022-07-22 21:44:22,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:22,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 104 [2022-07-22 21:44:22,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:22,172 INFO L129 PetriNetUnfolder]: 7/96 cut-off events. [2022-07-22 21:44:22,172 INFO L130 PetriNetUnfolder]: For 10/11 co-relation queries the response was YES. [2022-07-22 21:44:22,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 96 events. 7/96 cut-off events. For 10/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 1 based on Foata normal form. 7/96 useless extension candidates. Maximal degree in co-relation 65. Up to 10 conditions per place. [2022-07-22 21:44:22,176 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 6 selfloop transitions, 0 changer transitions 2/89 dead transitions. [2022-07-22 21:44:22,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 202 flow [2022-07-22 21:44:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:44:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:44:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2022-07-22 21:44:22,192 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9423076923076923 [2022-07-22 21:44:22,193 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2022-07-22 21:44:22,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2022-07-22 21:44:22,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:22,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2022-07-22 21:44:22,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,209 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,211 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 2 states and 196 transitions. [2022-07-22 21:44:22,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 202 flow [2022-07-22 21:44:22,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:44:22,220 INFO L242 Difference]: Finished difference. Result has 89 places, 87 transitions, 178 flow [2022-07-22 21:44:22,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2022-07-22 21:44:22,229 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2022-07-22 21:44:22,229 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 178 flow [2022-07-22 21:44:22,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,231 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:22,231 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] [2022-07-22 21:44:22,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:44:22,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1666724900, now seen corresponding path program 1 times [2022-07-22 21:44:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:22,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434977576] [2022-07-22 21:44:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:22,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:22,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434977576] [2022-07-22 21:44:22,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434977576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:22,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:22,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:44:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784788446] [2022-07-22 21:44:22,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:22,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:44:22,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:44:22,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:44:22,456 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-22 21:44:22,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:22,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-22 21:44:22,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:22,579 INFO L129 PetriNetUnfolder]: 21/139 cut-off events. [2022-07-22 21:44:22,579 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-07-22 21:44:22,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 139 events. 21/139 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 0 based on Foata normal form. 1/129 useless extension candidates. Maximal degree in co-relation 184. Up to 31 conditions per place. [2022-07-22 21:44:22,581 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 15 selfloop transitions, 9 changer transitions 4/97 dead transitions. [2022-07-22 21:44:22,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 257 flow [2022-07-22 21:44:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:44:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:44:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 582 transitions. [2022-07-22 21:44:22,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994505494505495 [2022-07-22 21:44:22,586 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 582 transitions. [2022-07-22 21:44:22,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 582 transitions. [2022-07-22 21:44:22,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:22,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 582 transitions. [2022-07-22 21:44:22,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.14285714285714) internal successors, (582), 7 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,592 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,592 INFO L186 Difference]: Start difference. First operand has 89 places, 87 transitions, 178 flow. Second operand 7 states and 582 transitions. [2022-07-22 21:44:22,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 257 flow [2022-07-22 21:44:22,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:44:22,595 INFO L242 Difference]: Finished difference. Result has 96 places, 91 transitions, 225 flow [2022-07-22 21:44:22,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2022-07-22 21:44:22,596 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 4 predicate places. [2022-07-22 21:44:22,596 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 225 flow [2022-07-22 21:44:22,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:22,597 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:22,597 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] [2022-07-22 21:44:22,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:44:22,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:22,598 INFO L85 PathProgramCache]: Analyzing trace with hash 319045297, now seen corresponding path program 1 times [2022-07-22 21:44:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:22,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964653327] [2022-07-22 21:44:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:22,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:22,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:22,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964653327] [2022-07-22 21:44:22,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964653327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:22,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715368740] [2022-07-22 21:44:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:22,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:22,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:22,779 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) [2022-07-22 21:44:22,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:44:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:22,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:44:22,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:23,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:23,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715368740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:23,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:23,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-22 21:44:23,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140637039] [2022-07-22 21:44:23,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:23,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:44:23,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:44:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:44:23,737 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-22 21:44:23,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 225 flow. Second operand has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:23,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:23,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-22 21:44:23,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:24,114 INFO L129 PetriNetUnfolder]: 116/418 cut-off events. [2022-07-22 21:44:24,114 INFO L130 PetriNetUnfolder]: For 55/62 co-relation queries the response was YES. [2022-07-22 21:44:24,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 418 events. 116/418 cut-off events. For 55/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1995 event pairs, 7 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 732. Up to 66 conditions per place. [2022-07-22 21:44:24,120 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 57 selfloop transitions, 14 changer transitions 1/133 dead transitions. [2022-07-22 21:44:24,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 480 flow [2022-07-22 21:44:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:44:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:44:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 763 transitions. [2022-07-22 21:44:24,124 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7336538461538461 [2022-07-22 21:44:24,124 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 763 transitions. [2022-07-22 21:44:24,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 763 transitions. [2022-07-22 21:44:24,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:24,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 763 transitions. [2022-07-22 21:44:24,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.3) internal successors, (763), 10 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,130 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,130 INFO L186 Difference]: Start difference. First operand has 96 places, 91 transitions, 225 flow. Second operand 10 states and 763 transitions. [2022-07-22 21:44:24,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 480 flow [2022-07-22 21:44:24,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 461 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-22 21:44:24,135 INFO L242 Difference]: Finished difference. Result has 103 places, 99 transitions, 290 flow [2022-07-22 21:44:24,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2022-07-22 21:44:24,137 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2022-07-22 21:44:24,137 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 290 flow [2022-07-22 21:44:24,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:24,138 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] [2022-07-22 21:44:24,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:44:24,355 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 [2022-07-22 21:44:24,356 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash -217293375, now seen corresponding path program 2 times [2022-07-22 21:44:24,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:24,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619612781] [2022-07-22 21:44:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:24,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:24,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619612781] [2022-07-22 21:44:24,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619612781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:24,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:24,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:44:24,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792884429] [2022-07-22 21:44:24,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:24,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:44:24,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:44:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:44:24,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-22 21:44:24,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:24,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-22 21:44:24,496 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:24,677 INFO L129 PetriNetUnfolder]: 116/398 cut-off events. [2022-07-22 21:44:24,678 INFO L130 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-07-22 21:44:24,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 398 events. 116/398 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1893 event pairs, 14 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 848. Up to 97 conditions per place. [2022-07-22 21:44:24,681 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 43 selfloop transitions, 16 changer transitions 4/124 dead transitions. [2022-07-22 21:44:24,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 124 transitions, 529 flow [2022-07-22 21:44:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:44:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:44:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2022-07-22 21:44:24,683 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2022-07-22 21:44:24,683 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2022-07-22 21:44:24,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2022-07-22 21:44:24,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:24,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2022-07-22 21:44:24,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,687 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,687 INFO L186 Difference]: Start difference. First operand has 103 places, 99 transitions, 290 flow. Second operand 7 states and 536 transitions. [2022-07-22 21:44:24,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 124 transitions, 529 flow [2022-07-22 21:44:24,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 124 transitions, 523 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:44:24,691 INFO L242 Difference]: Finished difference. Result has 109 places, 105 transitions, 385 flow [2022-07-22 21:44:24,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2022-07-22 21:44:24,692 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 17 predicate places. [2022-07-22 21:44:24,692 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 385 flow [2022-07-22 21:44:24,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,693 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:24,693 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] [2022-07-22 21:44:24,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:44:24,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1113196752, now seen corresponding path program 1 times [2022-07-22 21:44:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:24,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521058032] [2022-07-22 21:44:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:24,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:24,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:24,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521058032] [2022-07-22 21:44:24,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521058032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:24,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:24,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:44:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072601615] [2022-07-22 21:44:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:24,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:44:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:44:24,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:44:24,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-22 21:44:24,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:24,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:24,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-22 21:44:24,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:25,007 INFO L129 PetriNetUnfolder]: 111/390 cut-off events. [2022-07-22 21:44:25,007 INFO L130 PetriNetUnfolder]: For 450/457 co-relation queries the response was YES. [2022-07-22 21:44:25,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 390 events. 111/390 cut-off events. For 450/457 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1815 event pairs, 14 based on Foata normal form. 2/361 useless extension candidates. Maximal degree in co-relation 910. Up to 126 conditions per place. [2022-07-22 21:44:25,011 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 48 selfloop transitions, 12 changer transitions 5/126 dead transitions. [2022-07-22 21:44:25,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 593 flow [2022-07-22 21:44:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:44:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:44:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 537 transitions. [2022-07-22 21:44:25,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7376373626373627 [2022-07-22 21:44:25,014 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 537 transitions. [2022-07-22 21:44:25,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 537 transitions. [2022-07-22 21:44:25,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:25,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 537 transitions. [2022-07-22 21:44:25,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,017 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,018 INFO L186 Difference]: Start difference. First operand has 109 places, 105 transitions, 385 flow. Second operand 7 states and 537 transitions. [2022-07-22 21:44:25,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 593 flow [2022-07-22 21:44:25,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 126 transitions, 585 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:44:25,027 INFO L242 Difference]: Finished difference. Result has 115 places, 105 transitions, 404 flow [2022-07-22 21:44:25,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=115, PETRI_TRANSITIONS=105} [2022-07-22 21:44:25,030 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 23 predicate places. [2022-07-22 21:44:25,030 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 105 transitions, 404 flow [2022-07-22 21:44:25,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:25,031 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] [2022-07-22 21:44:25,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:44:25,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:25,032 INFO L85 PathProgramCache]: Analyzing trace with hash 704217598, now seen corresponding path program 2 times [2022-07-22 21:44:25,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:25,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416538677] [2022-07-22 21:44:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:25,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:25,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:25,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416538677] [2022-07-22 21:44:25,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416538677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:25,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:25,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:44:25,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420922711] [2022-07-22 21:44:25,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:25,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:44:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:44:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:44:25,169 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-22 21:44:25,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 105 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:25,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-22 21:44:25,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:25,341 INFO L129 PetriNetUnfolder]: 106/371 cut-off events. [2022-07-22 21:44:25,342 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-22 21:44:25,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 371 events. 106/371 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1567 event pairs, 17 based on Foata normal form. 4/347 useless extension candidates. Maximal degree in co-relation 907. Up to 75 conditions per place. [2022-07-22 21:44:25,346 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 47 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2022-07-22 21:44:25,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 638 flow [2022-07-22 21:44:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:44:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:44:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 531 transitions. [2022-07-22 21:44:25,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7293956043956044 [2022-07-22 21:44:25,349 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 531 transitions. [2022-07-22 21:44:25,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 531 transitions. [2022-07-22 21:44:25,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:25,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 531 transitions. [2022-07-22 21:44:25,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,352 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,353 INFO L186 Difference]: Start difference. First operand has 115 places, 105 transitions, 404 flow. Second operand 7 states and 531 transitions. [2022-07-22 21:44:25,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 638 flow [2022-07-22 21:44:25,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 124 transitions, 610 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-07-22 21:44:25,358 INFO L242 Difference]: Finished difference. Result has 120 places, 110 transitions, 482 flow [2022-07-22 21:44:25,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=482, PETRI_PLACES=120, PETRI_TRANSITIONS=110} [2022-07-22 21:44:25,359 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2022-07-22 21:44:25,359 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 110 transitions, 482 flow [2022-07-22 21:44:25,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,360 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:25,360 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] [2022-07-22 21:44:25,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:44:25,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash -147861111, now seen corresponding path program 1 times [2022-07-22 21:44:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:25,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068504982] [2022-07-22 21:44:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:25,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:25,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:25,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068504982] [2022-07-22 21:44:25,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068504982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834438102] [2022-07-22 21:44:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:25,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:25,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:25,595 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) [2022-07-22 21:44:25,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:44:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:25,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:44:25,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:25,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:26,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834438102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:26,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:26,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-07-22 21:44:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53825814] [2022-07-22 21:44:26,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:44:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:44:26,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:44:26,503 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2022-07-22 21:44:26,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 110 transitions, 482 flow. Second operand has 20 states, 20 states have (on average 70.25) internal successors, (1405), 20 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:26,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:26,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2022-07-22 21:44:26,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:29,169 INFO L129 PetriNetUnfolder]: 347/929 cut-off events. [2022-07-22 21:44:29,170 INFO L130 PetriNetUnfolder]: For 2692/2692 co-relation queries the response was YES. [2022-07-22 21:44:29,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 929 events. 347/929 cut-off events. For 2692/2692 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5041 event pairs, 10 based on Foata normal form. 44/909 useless extension candidates. Maximal degree in co-relation 2682. Up to 178 conditions per place. [2022-07-22 21:44:29,180 INFO L132 encePairwiseOnDemand]: 88/104 looper letters, 178 selfloop transitions, 87 changer transitions 0/324 dead transitions. [2022-07-22 21:44:29,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 324 transitions, 2285 flow [2022-07-22 21:44:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-22 21:44:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-22 21:44:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3067 transitions. [2022-07-22 21:44:29,188 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7021520146520146 [2022-07-22 21:44:29,189 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3067 transitions. [2022-07-22 21:44:29,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3067 transitions. [2022-07-22 21:44:29,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:29,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3067 transitions. [2022-07-22 21:44:29,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 73.02380952380952) internal successors, (3067), 42 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,207 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,207 INFO L186 Difference]: Start difference. First operand has 120 places, 110 transitions, 482 flow. Second operand 42 states and 3067 transitions. [2022-07-22 21:44:29,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 324 transitions, 2285 flow [2022-07-22 21:44:29,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 324 transitions, 2220 flow, removed 28 selfloop flow, removed 3 redundant places. [2022-07-22 21:44:29,219 INFO L242 Difference]: Finished difference. Result has 189 places, 195 transitions, 1417 flow [2022-07-22 21:44:29,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1417, PETRI_PLACES=189, PETRI_TRANSITIONS=195} [2022-07-22 21:44:29,221 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 97 predicate places. [2022-07-22 21:44:29,221 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 195 transitions, 1417 flow [2022-07-22 21:44:29,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.25) internal successors, (1405), 20 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,222 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:29,222 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:44:29,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:44:29,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-22 21:44:29,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:29,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1821391862, now seen corresponding path program 2 times [2022-07-22 21:44:29,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:29,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680193494] [2022-07-22 21:44:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:29,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:29,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:29,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680193494] [2022-07-22 21:44:29,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680193494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:29,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:29,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:44:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988144688] [2022-07-22 21:44:29,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:44:29,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:44:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:44:29,521 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-22 21:44:29,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 195 transitions, 1417 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:29,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-22 21:44:29,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:29,835 INFO L129 PetriNetUnfolder]: 434/1682 cut-off events. [2022-07-22 21:44:29,835 INFO L130 PetriNetUnfolder]: For 12826/12903 co-relation queries the response was YES. [2022-07-22 21:44:29,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6581 conditions, 1682 events. 434/1682 cut-off events. For 12826/12903 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13422 event pairs, 108 based on Foata normal form. 23/1564 useless extension candidates. Maximal degree in co-relation 6531. Up to 232 conditions per place. [2022-07-22 21:44:29,866 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 28 selfloop transitions, 5 changer transitions 0/212 dead transitions. [2022-07-22 21:44:29,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 212 transitions, 1563 flow [2022-07-22 21:44:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:44:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:44:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2022-07-22 21:44:29,868 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2022-07-22 21:44:29,869 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2022-07-22 21:44:29,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2022-07-22 21:44:29,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:29,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2022-07-22 21:44:29,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,871 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,871 INFO L186 Difference]: Start difference. First operand has 189 places, 195 transitions, 1417 flow. Second operand 4 states and 376 transitions. [2022-07-22 21:44:29,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 212 transitions, 1563 flow [2022-07-22 21:44:29,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 212 transitions, 1476 flow, removed 36 selfloop flow, removed 5 redundant places. [2022-07-22 21:44:29,944 INFO L242 Difference]: Finished difference. Result has 190 places, 198 transitions, 1364 flow [2022-07-22 21:44:29,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1364, PETRI_PLACES=190, PETRI_TRANSITIONS=198} [2022-07-22 21:44:29,947 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 98 predicate places. [2022-07-22 21:44:29,947 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 198 transitions, 1364 flow [2022-07-22 21:44:29,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:29,947 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:29,948 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:44:29,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:44:29,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1384763482, now seen corresponding path program 1 times [2022-07-22 21:44:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:29,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794255517] [2022-07-22 21:44:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:29,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:44:30,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:30,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794255517] [2022-07-22 21:44:30,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794255517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:30,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804899139] [2022-07-22 21:44:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:30,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:30,182 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) [2022-07-22 21:44:30,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:44:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:30,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:44:30,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:44:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:44:31,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804899139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:31,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:31,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-22 21:44:31,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657869544] [2022-07-22 21:44:31,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:31,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:44:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:44:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:44:31,088 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-07-22 21:44:31,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 198 transitions, 1364 flow. Second operand has 18 states, 18 states have (on average 71.22222222222223) internal successors, (1282), 18 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:31,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:31,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-07-22 21:44:31,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:31,963 INFO L129 PetriNetUnfolder]: 828/2406 cut-off events. [2022-07-22 21:44:31,964 INFO L130 PetriNetUnfolder]: For 18550/18603 co-relation queries the response was YES. [2022-07-22 21:44:31,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10323 conditions, 2406 events. 828/2406 cut-off events. For 18550/18603 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18926 event pairs, 65 based on Foata normal form. 15/2264 useless extension candidates. Maximal degree in co-relation 10270. Up to 449 conditions per place. [2022-07-22 21:44:31,998 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 115 selfloop transitions, 63 changer transitions 0/249 dead transitions. [2022-07-22 21:44:31,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 2222 flow [2022-07-22 21:44:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:44:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:44:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 973 transitions. [2022-07-22 21:44:32,001 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7196745562130178 [2022-07-22 21:44:32,001 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 973 transitions. [2022-07-22 21:44:32,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 973 transitions. [2022-07-22 21:44:32,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:32,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 973 transitions. [2022-07-22 21:44:32,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.84615384615384) internal successors, (973), 13 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,008 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,008 INFO L186 Difference]: Start difference. First operand has 190 places, 198 transitions, 1364 flow. Second operand 13 states and 973 transitions. [2022-07-22 21:44:32,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 2222 flow [2022-07-22 21:44:32,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 249 transitions, 2222 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:44:32,072 INFO L242 Difference]: Finished difference. Result has 206 places, 206 transitions, 1660 flow [2022-07-22 21:44:32,073 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1660, PETRI_PLACES=206, PETRI_TRANSITIONS=206} [2022-07-22 21:44:32,074 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 114 predicate places. [2022-07-22 21:44:32,074 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 206 transitions, 1660 flow [2022-07-22 21:44:32,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.22222222222223) internal successors, (1282), 18 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,075 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:32,075 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:44:32,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:44:32,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:32,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash -932018700, now seen corresponding path program 1 times [2022-07-22 21:44:32,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:32,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250265413] [2022-07-22 21:44:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 21:44:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:32,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250265413] [2022-07-22 21:44:32,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250265413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:32,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:32,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:44:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564136300] [2022-07-22 21:44:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:32,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:44:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:44:32,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:44:32,418 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-22 21:44:32,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 206 transitions, 1660 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:32,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-22 21:44:32,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:32,723 INFO L129 PetriNetUnfolder]: 375/1488 cut-off events. [2022-07-22 21:44:32,724 INFO L130 PetriNetUnfolder]: For 11290/11369 co-relation queries the response was YES. [2022-07-22 21:44:32,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5982 conditions, 1488 events. 375/1488 cut-off events. For 11290/11369 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11125 event pairs, 90 based on Foata normal form. 31/1394 useless extension candidates. Maximal degree in co-relation 5925. Up to 235 conditions per place. [2022-07-22 21:44:32,751 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 24 selfloop transitions, 6 changer transitions 0/217 dead transitions. [2022-07-22 21:44:32,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 217 transitions, 1777 flow [2022-07-22 21:44:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:44:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:44:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2022-07-22 21:44:32,753 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8966346153846154 [2022-07-22 21:44:32,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 373 transitions. [2022-07-22 21:44:32,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 373 transitions. [2022-07-22 21:44:32,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:32,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 373 transitions. [2022-07-22 21:44:32,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,756 INFO L186 Difference]: Start difference. First operand has 206 places, 206 transitions, 1660 flow. Second operand 4 states and 373 transitions. [2022-07-22 21:44:32,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 217 transitions, 1777 flow [2022-07-22 21:44:32,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 217 transitions, 1742 flow, removed 1 selfloop flow, removed 7 redundant places. [2022-07-22 21:44:32,804 INFO L242 Difference]: Finished difference. Result has 204 places, 208 transitions, 1659 flow [2022-07-22 21:44:32,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1659, PETRI_PLACES=204, PETRI_TRANSITIONS=208} [2022-07-22 21:44:32,805 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 112 predicate places. [2022-07-22 21:44:32,805 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 208 transitions, 1659 flow [2022-07-22 21:44:32,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,806 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:32,806 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:44:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:44:32,806 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash 591378688, now seen corresponding path program 2 times [2022-07-22 21:44:32,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:32,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803912837] [2022-07-22 21:44:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:32,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:44:32,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:32,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803912837] [2022-07-22 21:44:32,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803912837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:32,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:32,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:44:32,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225203370] [2022-07-22 21:44:32,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:32,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:44:32,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:44:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:44:32,881 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-22 21:44:32,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 208 transitions, 1659 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:32,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:32,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-22 21:44:32,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:33,606 INFO L129 PetriNetUnfolder]: 1011/3594 cut-off events. [2022-07-22 21:44:33,606 INFO L130 PetriNetUnfolder]: For 29453/29537 co-relation queries the response was YES. [2022-07-22 21:44:33,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15601 conditions, 3594 events. 1011/3594 cut-off events. For 29453/29537 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 34512 event pairs, 266 based on Foata normal form. 26/3394 useless extension candidates. Maximal degree in co-relation 15542. Up to 506 conditions per place. [2022-07-22 21:44:33,733 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 29 selfloop transitions, 5 changer transitions 0/226 dead transitions. [2022-07-22 21:44:33,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 226 transitions, 1809 flow [2022-07-22 21:44:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:44:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:44:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2022-07-22 21:44:33,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-07-22 21:44:33,746 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2022-07-22 21:44:33,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2022-07-22 21:44:33,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:33,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2022-07-22 21:44:33,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:33,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:33,749 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:33,749 INFO L186 Difference]: Start difference. First operand has 204 places, 208 transitions, 1659 flow. Second operand 4 states and 377 transitions. [2022-07-22 21:44:33,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 226 transitions, 1809 flow [2022-07-22 21:44:33,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 226 transitions, 1809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:44:33,915 INFO L242 Difference]: Finished difference. Result has 210 places, 211 transitions, 1693 flow [2022-07-22 21:44:33,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1693, PETRI_PLACES=210, PETRI_TRANSITIONS=211} [2022-07-22 21:44:33,916 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 118 predicate places. [2022-07-22 21:44:33,917 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 211 transitions, 1693 flow [2022-07-22 21:44:33,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:33,917 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:33,917 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:44:33,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:44:33,918 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:33,918 INFO L85 PathProgramCache]: Analyzing trace with hash 291710930, now seen corresponding path program 1 times [2022-07-22 21:44:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:33,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979802568] [2022-07-22 21:44:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:34,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:34,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979802568] [2022-07-22 21:44:34,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979802568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:34,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071799033] [2022-07-22 21:44:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:34,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:34,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:34,080 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) [2022-07-22 21:44:34,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:44:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:44:34,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:34,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:34,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071799033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:34,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:34,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-22 21:44:34,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612776426] [2022-07-22 21:44:34,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:34,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:44:34,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:44:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:44:34,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-22 21:44:34,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 211 transitions, 1693 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:34,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:34,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-22 21:44:34,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:35,320 INFO L129 PetriNetUnfolder]: 1003/3973 cut-off events. [2022-07-22 21:44:35,320 INFO L130 PetriNetUnfolder]: For 35812/36067 co-relation queries the response was YES. [2022-07-22 21:44:35,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18085 conditions, 3973 events. 1003/3973 cut-off events. For 35812/36067 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 39168 event pairs, 295 based on Foata normal form. 62/3861 useless extension candidates. Maximal degree in co-relation 18023. Up to 611 conditions per place. [2022-07-22 21:44:35,387 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 36 selfloop transitions, 20 changer transitions 4/246 dead transitions. [2022-07-22 21:44:35,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 246 transitions, 1951 flow [2022-07-22 21:44:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:44:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:44:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 844 transitions. [2022-07-22 21:44:35,390 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8115384615384615 [2022-07-22 21:44:35,390 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 844 transitions. [2022-07-22 21:44:35,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 844 transitions. [2022-07-22 21:44:35,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:35,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 844 transitions. [2022-07-22 21:44:35,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.4) internal successors, (844), 10 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:35,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:35,394 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:35,394 INFO L186 Difference]: Start difference. First operand has 210 places, 211 transitions, 1693 flow. Second operand 10 states and 844 transitions. [2022-07-22 21:44:35,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 246 transitions, 1951 flow [2022-07-22 21:44:35,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 246 transitions, 1951 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:44:35,500 INFO L242 Difference]: Finished difference. Result has 222 places, 222 transitions, 1799 flow [2022-07-22 21:44:35,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1799, PETRI_PLACES=222, PETRI_TRANSITIONS=222} [2022-07-22 21:44:35,501 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 130 predicate places. [2022-07-22 21:44:35,502 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 222 transitions, 1799 flow [2022-07-22 21:44:35,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:35,502 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:35,502 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:44:35,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:44:35,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:35,715 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:35,716 INFO L85 PathProgramCache]: Analyzing trace with hash -398723812, now seen corresponding path program 2 times [2022-07-22 21:44:35,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:35,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514833346] [2022-07-22 21:44:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:35,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514833346] [2022-07-22 21:44:35,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514833346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:35,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462393778] [2022-07-22 21:44:35,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:44:35,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:35,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:35,936 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) [2022-07-22 21:44:35,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:44:36,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:44:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:44:36,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:44:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:36,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:36,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462393778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:36,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:36,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-22 21:44:36,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058118073] [2022-07-22 21:44:36,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:36,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:44:36,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:36,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:44:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:44:36,326 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-22 21:44:36,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 222 transitions, 1799 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:36,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:36,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-22 21:44:36,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:37,821 INFO L129 PetriNetUnfolder]: 1603/6338 cut-off events. [2022-07-22 21:44:37,821 INFO L130 PetriNetUnfolder]: For 61811/62357 co-relation queries the response was YES. [2022-07-22 21:44:37,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30128 conditions, 6338 events. 1603/6338 cut-off events. For 61811/62357 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 67958 event pairs, 372 based on Foata normal form. 113/6203 useless extension candidates. Maximal degree in co-relation 30062. Up to 785 conditions per place. [2022-07-22 21:44:37,901 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 47 selfloop transitions, 35 changer transitions 4/272 dead transitions. [2022-07-22 21:44:37,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 272 transitions, 2228 flow [2022-07-22 21:44:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:44:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:44:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 934 transitions. [2022-07-22 21:44:37,903 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8164335664335665 [2022-07-22 21:44:37,904 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 934 transitions. [2022-07-22 21:44:37,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 934 transitions. [2022-07-22 21:44:37,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:37,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 934 transitions. [2022-07-22 21:44:37,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.9090909090909) internal successors, (934), 11 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:37,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:37,908 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:37,909 INFO L186 Difference]: Start difference. First operand has 222 places, 222 transitions, 1799 flow. Second operand 11 states and 934 transitions. [2022-07-22 21:44:37,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 272 transitions, 2228 flow [2022-07-22 21:44:38,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 272 transitions, 2147 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-07-22 21:44:38,108 INFO L242 Difference]: Finished difference. Result has 228 places, 237 transitions, 1921 flow [2022-07-22 21:44:38,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1921, PETRI_PLACES=228, PETRI_TRANSITIONS=237} [2022-07-22 21:44:38,110 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 136 predicate places. [2022-07-22 21:44:38,110 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 237 transitions, 1921 flow [2022-07-22 21:44:38,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:38,111 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:38,111 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:44:38,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 21:44:38,327 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,SelfDestructingSolverStorable12 [2022-07-22 21:44:38,327 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1128249126, now seen corresponding path program 3 times [2022-07-22 21:44:38,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:38,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320115512] [2022-07-22 21:44:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:38,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:38,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320115512] [2022-07-22 21:44:38,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320115512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:38,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535210757] [2022-07-22 21:44:38,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:44:38,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:38,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:38,486 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) [2022-07-22 21:44:38,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:44:38,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:44:38,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:44:38,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:44:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:38,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:38,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535210757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:38,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:38,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-22 21:44:38,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512474425] [2022-07-22 21:44:38,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:38,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:44:38,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:44:38,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:44:38,942 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-22 21:44:38,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 237 transitions, 1921 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:38,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:38,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-22 21:44:38,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:40,570 INFO L129 PetriNetUnfolder]: 1998/8151 cut-off events. [2022-07-22 21:44:40,571 INFO L130 PetriNetUnfolder]: For 80698/81392 co-relation queries the response was YES. [2022-07-22 21:44:40,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38650 conditions, 8151 events. 1998/8151 cut-off events. For 80698/81392 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 93127 event pairs, 520 based on Foata normal form. 126/7957 useless extension candidates. Maximal degree in co-relation 38582. Up to 1104 conditions per place. [2022-07-22 21:44:40,665 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 72 selfloop transitions, 27 changer transitions 4/289 dead transitions. [2022-07-22 21:44:40,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 289 transitions, 2414 flow [2022-07-22 21:44:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:44:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:44:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-07-22 21:44:40,668 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-07-22 21:44:40,668 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-07-22 21:44:40,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-07-22 21:44:40,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:40,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-07-22 21:44:40,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:40,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:40,673 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:40,673 INFO L186 Difference]: Start difference. First operand has 228 places, 237 transitions, 1921 flow. Second operand 11 states and 931 transitions. [2022-07-22 21:44:40,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 289 transitions, 2414 flow [2022-07-22 21:44:40,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 289 transitions, 2326 flow, removed 34 selfloop flow, removed 6 redundant places. [2022-07-22 21:44:40,941 INFO L242 Difference]: Finished difference. Result has 234 places, 253 transitions, 2060 flow [2022-07-22 21:44:40,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2060, PETRI_PLACES=234, PETRI_TRANSITIONS=253} [2022-07-22 21:44:40,942 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 142 predicate places. [2022-07-22 21:44:40,942 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 253 transitions, 2060 flow [2022-07-22 21:44:40,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:40,943 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:40,943 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:44:40,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:44:41,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:41,169 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:41,169 INFO L85 PathProgramCache]: Analyzing trace with hash 409894142, now seen corresponding path program 1 times [2022-07-22 21:44:41,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:41,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902026019] [2022-07-22 21:44:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:41,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:41,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:41,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902026019] [2022-07-22 21:44:41,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902026019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:41,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:41,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:44:41,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54657727] [2022-07-22 21:44:41,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:41,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:44:41,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:41,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:44:41,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:44:41,294 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-22 21:44:41,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 253 transitions, 2060 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:41,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:41,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-22 21:44:41,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:42,626 INFO L129 PetriNetUnfolder]: 2124/8002 cut-off events. [2022-07-22 21:44:42,626 INFO L130 PetriNetUnfolder]: For 79350/79767 co-relation queries the response was YES. [2022-07-22 21:44:42,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38630 conditions, 8002 events. 2124/8002 cut-off events. For 79350/79767 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 89616 event pairs, 475 based on Foata normal form. 191/7895 useless extension candidates. Maximal degree in co-relation 38560. Up to 1057 conditions per place. [2022-07-22 21:44:42,838 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 80 selfloop transitions, 6 changer transitions 0/296 dead transitions. [2022-07-22 21:44:42,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 296 transitions, 2530 flow [2022-07-22 21:44:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:44:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:44:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2022-07-22 21:44:42,840 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2022-07-22 21:44:42,840 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2022-07-22 21:44:42,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2022-07-22 21:44:42,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:42,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2022-07-22 21:44:42,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:42,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:42,843 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:42,843 INFO L186 Difference]: Start difference. First operand has 234 places, 253 transitions, 2060 flow. Second operand 4 states and 375 transitions. [2022-07-22 21:44:42,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 296 transitions, 2530 flow [2022-07-22 21:44:43,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 296 transitions, 2493 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-22 21:44:43,050 INFO L242 Difference]: Finished difference. Result has 232 places, 253 transitions, 2059 flow [2022-07-22 21:44:43,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2059, PETRI_PLACES=232, PETRI_TRANSITIONS=253} [2022-07-22 21:44:43,051 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 140 predicate places. [2022-07-22 21:44:43,051 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 253 transitions, 2059 flow [2022-07-22 21:44:43,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:43,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:43,052 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:44:43,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:44:43,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:43,053 INFO L85 PathProgramCache]: Analyzing trace with hash 184085024, now seen corresponding path program 4 times [2022-07-22 21:44:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:43,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873604609] [2022-07-22 21:44:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:43,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:43,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873604609] [2022-07-22 21:44:43,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873604609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:43,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67637239] [2022-07-22 21:44:43,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:44:43,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:43,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:43,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:44:43,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:44:43,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:44:43,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:44:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:44:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:43,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:43,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67637239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:43,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:43,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-22 21:44:43,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214423625] [2022-07-22 21:44:43,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:43,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:44:43,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:43,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:44:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:44:43,519 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-22 21:44:43,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 253 transitions, 2059 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:43,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:43,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-22 21:44:43,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:44,865 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([253] L44-->L51: Formula: (= v_~pos~0_23 (+ v_~pos~0_24 1)) InVars {~pos~0=v_~pos~0_24} OutVars{thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_1|, ~pos~0=v_~pos~0_23} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post1, ~pos~0][125], [1259#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), Black: 640#(and (<= (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296)))) (<= (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), Black: 631#true, 1843#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 1586#(< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)), Black: 1826#(and (<= ~i2~0 (+ (* (div (+ (- 1) ~i2~0) 4294967296) 4294967296) 1)) (<= |thread2Thread1of1ForFork1_#t~post4| (* (div |thread2Thread1of1ForFork1_#t~post4| 4294967296) 4294967296)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1270#(and (<= ~i2~0 (* (div ~i2~0 4294967296) 4294967296)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1265#true, Black: 1501#(and (<= ~i2~0 (+ (* (div (+ (- 1) ~i2~0) 4294967296) 4294967296) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 6#L94-4true, 1837#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), Black: 1834#true, 3656#true, Black: 1844#(and (<= ~d2~0 (* (div ~d2~0 256) 256)) (<= 0 ~d2~0)), Black: 1841#true, Black: 3052#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 3053#(<= ~pos~0 (+ (* (div (+ (- 1) ~pos~0) 4294967296) 4294967296) 1)), Black: 3649#true, 131#(<= (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296))), Black: 1166#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1198#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1))), Black: 1208#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1204#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1))), Black: 1212#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 618#true, Black: 1178#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1202#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1186#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), 106#true, Black: 1210#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1196#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1206#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 603#true, Black: 1168#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1162#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 592#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 126#true, Black: 652#(and (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1192#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 264#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod ~i2~0 4294967296) 0)), Black: 594#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 1182#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), 3048#true, Black: 1194#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 650#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1188#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1170#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1176#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1214#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1200#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 645#true, 8#L51true, Black: 1220#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 941#(< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)), Black: 1174#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 59#L70true, Black: 868#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (< (mod (+ 4294967295 ~i2~0) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 2452#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1190#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 608#(<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))), Black: 1172#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 2448#true, Black: 1164#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 610#(and (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0)) (<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296))))), Black: 607#(<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0)), 1849#true, Black: 1257#true, Black: 1260#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), Black: 623#(<= (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296)) (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))), Black: 627#(and (<= (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296)) (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))) (<= (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), 3652#(and (<= (div ~d2~0 256) 0) (<= 1 ~d2~0)), Black: 113#(= (+ (* (- 4294967296) (div ~pos~0 4294967296)) ~pos~0) 0), 636#(<= (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))))]) [2022-07-22 21:44:44,865 INFO L384 tUnfolder$Statistics]: this new event has 96 ancestors and is cut-off event [2022-07-22 21:44:44,865 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-22 21:44:44,866 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-22 21:44:44,866 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-22 21:44:44,999 INFO L129 PetriNetUnfolder]: 1872/7710 cut-off events. [2022-07-22 21:44:44,999 INFO L130 PetriNetUnfolder]: For 79989/80605 co-relation queries the response was YES. [2022-07-22 21:44:45,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37808 conditions, 7710 events. 1872/7710 cut-off events. For 79989/80605 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 87447 event pairs, 541 based on Foata normal form. 126/7500 useless extension candidates. Maximal degree in co-relation 37738. Up to 1226 conditions per place. [2022-07-22 21:44:45,121 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 76 selfloop transitions, 27 changer transitions 4/295 dead transitions. [2022-07-22 21:44:45,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 295 transitions, 2485 flow [2022-07-22 21:44:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:44:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:44:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2022-07-22 21:44:45,124 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2022-07-22 21:44:45,124 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2022-07-22 21:44:45,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2022-07-22 21:44:45,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:45,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2022-07-22 21:44:45,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:45,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:45,129 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:45,129 INFO L186 Difference]: Start difference. First operand has 232 places, 253 transitions, 2059 flow. Second operand 10 states and 843 transitions. [2022-07-22 21:44:45,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 295 transitions, 2485 flow [2022-07-22 21:44:45,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 295 transitions, 2485 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:44:45,330 INFO L242 Difference]: Finished difference. Result has 246 places, 271 transitions, 2289 flow [2022-07-22 21:44:45,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2289, PETRI_PLACES=246, PETRI_TRANSITIONS=271} [2022-07-22 21:44:45,330 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 154 predicate places. [2022-07-22 21:44:45,330 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 271 transitions, 2289 flow [2022-07-22 21:44:45,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:45,331 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:45,332 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:44:45,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 21:44:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:45,557 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1699141446, now seen corresponding path program 5 times [2022-07-22 21:44:45,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:45,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387035439] [2022-07-22 21:44:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:45,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:45,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387035439] [2022-07-22 21:44:45,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387035439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:45,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841881238] [2022-07-22 21:44:45,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:44:45,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:45,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:44:45,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:44:45,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 21:44:45,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:44:45,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:44:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:46,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:46,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841881238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:46,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:46,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-22 21:44:46,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186307089] [2022-07-22 21:44:46,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:46,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:44:46,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:46,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:44:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:44:46,164 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-22 21:44:46,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 271 transitions, 2289 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:46,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:46,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-22 21:44:46,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:48,040 INFO L129 PetriNetUnfolder]: 2333/9545 cut-off events. [2022-07-22 21:44:48,040 INFO L130 PetriNetUnfolder]: For 102247/103107 co-relation queries the response was YES. [2022-07-22 21:44:48,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47581 conditions, 9545 events. 2333/9545 cut-off events. For 102247/103107 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 112166 event pairs, 613 based on Foata normal form. 245/9401 useless extension candidates. Maximal degree in co-relation 47505. Up to 1300 conditions per place. [2022-07-22 21:44:48,165 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 75 selfloop transitions, 61 changer transitions 4/328 dead transitions. [2022-07-22 21:44:48,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 328 transitions, 2918 flow [2022-07-22 21:44:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:44:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:44:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2022-07-22 21:44:48,172 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2022-07-22 21:44:48,172 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2022-07-22 21:44:48,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2022-07-22 21:44:48,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:48,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2022-07-22 21:44:48,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:48,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:48,178 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:48,178 INFO L186 Difference]: Start difference. First operand has 246 places, 271 transitions, 2289 flow. Second operand 11 states and 933 transitions. [2022-07-22 21:44:48,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 328 transitions, 2918 flow [2022-07-22 21:44:48,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 328 transitions, 2883 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-22 21:44:48,587 INFO L242 Difference]: Finished difference. Result has 255 places, 293 transitions, 2698 flow [2022-07-22 21:44:48,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2698, PETRI_PLACES=255, PETRI_TRANSITIONS=293} [2022-07-22 21:44:48,588 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 163 predicate places. [2022-07-22 21:44:48,588 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 293 transitions, 2698 flow [2022-07-22 21:44:48,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:48,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:48,589 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:44:48,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:44:48,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:44:48,800 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash -110206322, now seen corresponding path program 6 times [2022-07-22 21:44:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:48,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119673364] [2022-07-22 21:44:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:48,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119673364] [2022-07-22 21:44:48,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119673364] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162693983] [2022-07-22 21:44:48,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:44:48,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:48,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:48,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:44:49,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:44:49,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:44:49,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:44:49,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:44:49,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:49,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:44:49,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162693983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:49,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:49,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-22 21:44:49,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687820760] [2022-07-22 21:44:49,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:49,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:44:49,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:44:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:44:49,394 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-22 21:44:49,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 293 transitions, 2698 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:49,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:49,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-22 21:44:49,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:51,440 INFO L129 PetriNetUnfolder]: 2497/10270 cut-off events. [2022-07-22 21:44:51,441 INFO L130 PetriNetUnfolder]: For 115350/116438 co-relation queries the response was YES. [2022-07-22 21:44:51,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52490 conditions, 10270 events. 2497/10270 cut-off events. For 115350/116438 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 122677 event pairs, 676 based on Foata normal form. 259/10117 useless extension candidates. Maximal degree in co-relation 52409. Up to 1413 conditions per place. [2022-07-22 21:44:51,565 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 112 selfloop transitions, 39 changer transitions 4/343 dead transitions. [2022-07-22 21:44:51,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 343 transitions, 3327 flow [2022-07-22 21:44:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:44:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:44:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-07-22 21:44:51,567 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-07-22 21:44:51,567 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-07-22 21:44:51,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-07-22 21:44:51,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:51,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-07-22 21:44:51,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:51,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:51,572 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:51,572 INFO L186 Difference]: Start difference. First operand has 255 places, 293 transitions, 2698 flow. Second operand 11 states and 931 transitions. [2022-07-22 21:44:51,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 343 transitions, 3327 flow [2022-07-22 21:44:51,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 343 transitions, 3260 flow, removed 29 selfloop flow, removed 5 redundant places. [2022-07-22 21:44:52,004 INFO L242 Difference]: Finished difference. Result has 263 places, 307 transitions, 2930 flow [2022-07-22 21:44:52,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2930, PETRI_PLACES=263, PETRI_TRANSITIONS=307} [2022-07-22 21:44:52,005 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 171 predicate places. [2022-07-22 21:44:52,005 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 307 transitions, 2930 flow [2022-07-22 21:44:52,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:52,007 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:52,007 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-22 21:44:52,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:44:52,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 21:44:52,215 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:52,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2103120229, now seen corresponding path program 7 times [2022-07-22 21:44:52,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:52,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162027813] [2022-07-22 21:44:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:52,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:52,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162027813] [2022-07-22 21:44:52,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162027813] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864915912] [2022-07-22 21:44:52,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:44:52,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:52,608 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:44:52,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:44:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:52,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 21:44:52,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:53,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:58,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864915912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:58,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:58,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-07-22 21:44:58,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065041397] [2022-07-22 21:44:58,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:58,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 21:44:58,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 21:44:58,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1265, Unknown=1, NotChecked=0, Total=1406 [2022-07-22 21:44:58,678 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-07-22 21:44:58,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 307 transitions, 2930 flow. Second operand has 38 states, 38 states have (on average 65.86842105263158) internal successors, (2503), 38 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:58,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:58,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-07-22 21:44:58,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:02,617 INFO L129 PetriNetUnfolder]: 8004/24504 cut-off events. [2022-07-22 21:46:02,618 INFO L130 PetriNetUnfolder]: For 307428/307620 co-relation queries the response was YES. [2022-07-22 21:46:02,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138898 conditions, 24504 events. 8004/24504 cut-off events. For 307428/307620 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 303650 event pairs, 717 based on Foata normal form. 429/24873 useless extension candidates. Maximal degree in co-relation 138813. Up to 5384 conditions per place. [2022-07-22 21:46:03,093 INFO L132 encePairwiseOnDemand]: 84/104 looper letters, 868 selfloop transitions, 335 changer transitions 0/1266 dead transitions. [2022-07-22 21:46:03,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1266 transitions, 16029 flow [2022-07-22 21:46:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-22 21:46:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-22 21:46:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 6529 transitions. [2022-07-22 21:46:03,109 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.66082995951417 [2022-07-22 21:46:03,110 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 6529 transitions. [2022-07-22 21:46:03,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 6529 transitions. [2022-07-22 21:46:03,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:03,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 6529 transitions. [2022-07-22 21:46:03,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 68.72631578947369) internal successors, (6529), 95 states have internal predecessors, (6529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:03,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 104.0) internal successors, (9984), 96 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:03,307 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 104.0) internal successors, (9984), 96 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:03,308 INFO L186 Difference]: Start difference. First operand has 263 places, 307 transitions, 2930 flow. Second operand 95 states and 6529 transitions. [2022-07-22 21:46:03,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1266 transitions, 16029 flow [2022-07-22 21:46:04,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1266 transitions, 15900 flow, removed 52 selfloop flow, removed 6 redundant places. [2022-07-22 21:46:04,399 INFO L242 Difference]: Finished difference. Result has 389 places, 588 transitions, 7784 flow [2022-07-22 21:46:04,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=7784, PETRI_PLACES=389, PETRI_TRANSITIONS=588} [2022-07-22 21:46:04,400 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 297 predicate places. [2022-07-22 21:46:04,401 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 588 transitions, 7784 flow [2022-07-22 21:46:04,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 65.86842105263158) internal successors, (2503), 38 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:04,401 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:04,402 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-22 21:46:04,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 21:46:04,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:04,602 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash 88614813, now seen corresponding path program 8 times [2022-07-22 21:46:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:04,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35074638] [2022-07-22 21:46:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:04,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:05,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:05,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35074638] [2022-07-22 21:46:05,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35074638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:05,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257511328] [2022-07-22 21:46:05,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:46:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:05,066 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:05,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:46:05,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:46:05,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:05,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 21:46:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:06,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:12,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257511328] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:12,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:12,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 39 [2022-07-22 21:46:12,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479642660] [2022-07-22 21:46:12,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:12,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 21:46:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 21:46:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1317, Unknown=1, NotChecked=0, Total=1482 [2022-07-22 21:46:12,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-07-22 21:46:12,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 588 transitions, 7784 flow. Second operand has 39 states, 39 states have (on average 65.7948717948718) internal successors, (2566), 39 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:12,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:12,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-07-22 21:46:12,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:12,076 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 57 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)