./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G --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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:38:22,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:38:22,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:38:22,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:38:22,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:38:22,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:38:22,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:38:22,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:38:22,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:38:22,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:38:22,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:38:22,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:38:22,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:38:22,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:38:22,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:38:22,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:38:22,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:38:22,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:38:22,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:38:22,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:38:22,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:38:22,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:38:22,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:38:22,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:38:22,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:38:22,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:38:22,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:38:22,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:38:22,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:38:22,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:38:22,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:38:22,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:38:22,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:38:22,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:38:22,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:38:22,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:38:22,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:38:22,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:38:22,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:38:22,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:38:22,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:38:22,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:38:22,722 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:38:22,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:38:22,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:38:22,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:38:22,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:38:22,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:38:22,724 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:38:22,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:38:22,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:38:22,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:38:22,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:38:22,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:38:22,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:38:22,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:38:22,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:38:22,726 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:38:22,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:38:22,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:38:22,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:38:22,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:38:22,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:38:22,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:38:22,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:38:22,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:38:22,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:38:22,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:38:22,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:38:22,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:38:22,736 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:38:22,736 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:38:22,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:38:22,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:38:22,737 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2021-11-23 13:38:22,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:38:23,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:38:23,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:38:23,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:38:23,064 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:38:23,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-11-23 13:38:23,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/data/4dc903351/9b1a9f28275a4622a42b7bc59b06d82a/FLAG5a581985b [2021-11-23 13:38:23,575 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:38:23,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-11-23 13:38:23,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/data/4dc903351/9b1a9f28275a4622a42b7bc59b06d82a/FLAG5a581985b [2021-11-23 13:38:23,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/data/4dc903351/9b1a9f28275a4622a42b7bc59b06d82a [2021-11-23 13:38:23,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:38:23,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:38:23,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:38:23,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:38:23,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:38:23,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:38:23" (1/1) ... [2021-11-23 13:38:23,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b85f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:23, skipping insertion in model container [2021-11-23 13:38:23,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:38:23" (1/1) ... [2021-11-23 13:38:24,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:38:24,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:38:24,169 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2021-11-23 13:38:24,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:38:24,181 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:38:24,202 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2021-11-23 13:38:24,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:38:24,219 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:38:24,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24 WrapperNode [2021-11-23 13:38:24,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:38:24,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:38:24,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:38:24,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:38:24,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,262 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2021-11-23 13:38:24,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:38:24,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:38:24,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:38:24,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:38:24,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:38:24,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:38:24,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:38:24,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:38:24,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (1/1) ... [2021-11-23 13:38:24,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:38:24,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:24,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:38:24,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:38:24,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:38:24,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-23 13:38:24,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-23 13:38:24,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-23 13:38:24,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-23 13:38:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:38:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:38:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:38:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-23 13:38:24,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-23 13:38:24,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:38:24,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:38:24,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:38:24,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:38:24,422 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-23 13:38:24,499 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:38:24,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:38:24,721 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:38:24,768 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:38:24,768 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 13:38:24,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:38:24 BoogieIcfgContainer [2021-11-23 13:38:24,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:38:24,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:38:24,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:38:24,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:38:24,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:38:23" (1/3) ... [2021-11-23 13:38:24,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3663f092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:38:24, skipping insertion in model container [2021-11-23 13:38:24,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:38:24" (2/3) ... [2021-11-23 13:38:24,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3663f092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:38:24, skipping insertion in model container [2021-11-23 13:38:24,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:38:24" (3/3) ... [2021-11-23 13:38:24,781 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2021-11-23 13:38:24,787 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-23 13:38:24,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:38:24,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:38:24,787 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-23 13:38:24,820 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,820 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,821 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,821 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,821 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,822 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,822 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,822 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,822 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,823 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,823 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,823 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,823 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,824 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,824 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,824 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,824 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,825 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,825 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,826 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,826 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,827 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,827 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,827 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,828 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,828 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,828 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,828 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,829 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,829 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,829 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,829 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,830 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,830 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,830 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,831 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,831 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,831 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,831 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,831 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,832 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,832 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,832 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,832 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,833 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,853 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:38:24,858 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-23 13:38:24,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:38:24,938 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:38:24,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 13:38:24,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2021-11-23 13:38:25,017 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-11-23 13:38:25,017 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-23 13:38:25,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-11-23 13:38:25,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2021-11-23 13:38:25,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2021-11-23 13:38:25,068 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2021-11-23 13:38:25,068 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-23 13:38:25,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:25,069 INFO L254 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] [2021-11-23 13:38:25,070 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2021-11-23 13:38:25,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:25,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177924027] [2021-11-23 13:38:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:25,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:25,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:25,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177924027] [2021-11-23 13:38:25,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177924027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:25,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:25,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:38:25,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304711600] [2021-11-23 13:38:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:25,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:38:25,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:38:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:38:25,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2021-11-23 13:38:25,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:25,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:25,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2021-11-23 13:38:25,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:25,545 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2021-11-23 13:38:25,546 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-11-23 13:38:25,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2021-11-23 13:38:25,548 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2021-11-23 13:38:25,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2021-11-23 13:38:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:38:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-23 13:38:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2021-11-23 13:38:25,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2021-11-23 13:38:25,573 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2021-11-23 13:38:25,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2021-11-23 13:38:25,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:25,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2021-11-23 13:38:25,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:25,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:25,587 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:25,590 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2021-11-23 13:38:25,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2021-11-23 13:38:25,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-23 13:38:25,599 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2021-11-23 13:38:25,601 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2021-11-23 13:38:25,605 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2021-11-23 13:38:25,606 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2021-11-23 13:38:25,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:25,606 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:25,607 INFO L254 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] [2021-11-23 13:38:25,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:38:25,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2021-11-23 13:38:25,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:25,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20596868] [2021-11-23 13:38:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:25,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:26,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:26,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20596868] [2021-11-23 13:38:26,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20596868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:26,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:26,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 13:38:26,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354350091] [2021-11-23 13:38:26,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:26,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:38:26,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:26,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:38:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:38:26,516 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-23 13:38:26,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:26,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:26,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-23 13:38:26,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:27,286 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2021-11-23 13:38:27,287 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-11-23 13:38:27,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 955 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2021-11-23 13:38:27,294 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2021-11-23 13:38:27,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2021-11-23 13:38:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:38:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-23 13:38:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2021-11-23 13:38:27,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2021-11-23 13:38:27,307 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2021-11-23 13:38:27,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2021-11-23 13:38:27,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:27,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2021-11-23 13:38:27,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:27,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:27,325 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:27,325 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2021-11-23 13:38:27,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2021-11-23 13:38:27,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-23 13:38:27,334 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2021-11-23 13:38:27,335 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2021-11-23 13:38:27,337 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2021-11-23 13:38:27,337 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2021-11-23 13:38:27,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:27,339 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:27,339 INFO L254 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] [2021-11-23 13:38:27,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:38:27,341 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash -42932599, now seen corresponding path program 2 times [2021-11-23 13:38:27,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:27,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614954393] [2021-11-23 13:38:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:27,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:27,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:27,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614954393] [2021-11-23 13:38:27,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614954393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:27,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:27,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 13:38:27,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374508562] [2021-11-23 13:38:27,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:27,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:38:27,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:38:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:38:27,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-23 13:38:27,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:27,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:27,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-23 13:38:27,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:28,456 INFO L129 PetriNetUnfolder]: 68/263 cut-off events. [2021-11-23 13:38:28,456 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2021-11-23 13:38:28,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 263 events. 68/263 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1086 event pairs, 35 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 530. Up to 102 conditions per place. [2021-11-23 13:38:28,462 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2021-11-23 13:38:28,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2021-11-23 13:38:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:38:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-23 13:38:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-11-23 13:38:28,469 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2021-11-23 13:38:28,470 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-11-23 13:38:28,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-11-23 13:38:28,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:28,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-11-23 13:38:28,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:28,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:28,480 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:28,480 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2021-11-23 13:38:28,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2021-11-23 13:38:28,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-11-23 13:38:28,497 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2021-11-23 13:38:28,497 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2021-11-23 13:38:28,500 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2021-11-23 13:38:28,500 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2021-11-23 13:38:28,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:28,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:28,502 INFO L254 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] [2021-11-23 13:38:28,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:38:28,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash -9274299, now seen corresponding path program 3 times [2021-11-23 13:38:28,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:28,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181533640] [2021-11-23 13:38:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:28,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:28,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:28,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181533640] [2021-11-23 13:38:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181533640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:28,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:28,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 13:38:28,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672403355] [2021-11-23 13:38:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:28,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:38:28,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:38:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:38:28,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-23 13:38:28,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:28,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:28,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-23 13:38:28,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:29,485 INFO L129 PetriNetUnfolder]: 72/296 cut-off events. [2021-11-23 13:38:29,485 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2021-11-23 13:38:29,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 296 events. 72/296 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1335 event pairs, 37 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 652. Up to 105 conditions per place. [2021-11-23 13:38:29,489 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2021-11-23 13:38:29,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2021-11-23 13:38:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:38:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-23 13:38:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2021-11-23 13:38:29,493 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2021-11-23 13:38:29,494 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2021-11-23 13:38:29,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2021-11-23 13:38:29,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:29,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2021-11-23 13:38:29,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:29,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:29,501 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:29,501 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2021-11-23 13:38:29,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2021-11-23 13:38:29,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-11-23 13:38:29,507 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2021-11-23 13:38:29,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2021-11-23 13:38:29,509 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2021-11-23 13:38:29,509 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2021-11-23 13:38:29,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:29,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:29,510 INFO L254 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] [2021-11-23 13:38:29,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:38:29,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash 269524785, now seen corresponding path program 4 times [2021-11-23 13:38:29,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546575548] [2021-11-23 13:38:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:29,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:29,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546575548] [2021-11-23 13:38:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546575548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:29,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:29,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 13:38:29,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992609988] [2021-11-23 13:38:29,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:29,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:38:29,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:38:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:38:29,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-23 13:38:29,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:29,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:29,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-23 13:38:29,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:30,381 INFO L129 PetriNetUnfolder]: 71/297 cut-off events. [2021-11-23 13:38:30,381 INFO L130 PetriNetUnfolder]: For 225/234 co-relation queries the response was YES. [2021-11-23 13:38:30,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 297 events. 71/297 cut-off events. For 225/234 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1363 event pairs, 40 based on Foata normal form. 3/293 useless extension candidates. Maximal degree in co-relation 670. Up to 105 conditions per place. [2021-11-23 13:38:30,387 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2021-11-23 13:38:30,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2021-11-23 13:38:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:38:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-23 13:38:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2021-11-23 13:38:30,391 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2021-11-23 13:38:30,392 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2021-11-23 13:38:30,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2021-11-23 13:38:30,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:30,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2021-11-23 13:38:30,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:30,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:30,402 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:30,402 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2021-11-23 13:38:30,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2021-11-23 13:38:30,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-11-23 13:38:30,412 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2021-11-23 13:38:30,413 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2021-11-23 13:38:30,416 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2021-11-23 13:38:30,416 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2021-11-23 13:38:30,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:30,417 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:30,418 INFO L254 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] [2021-11-23 13:38:30,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:38:30,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1546636013, now seen corresponding path program 5 times [2021-11-23 13:38:30,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:30,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502013353] [2021-11-23 13:38:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:30,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:30,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502013353] [2021-11-23 13:38:30,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502013353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:30,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:30,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 13:38:30,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054279941] [2021-11-23 13:38:30,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:30,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:38:30,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:38:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:38:30,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-23 13:38:30,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:30,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:30,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-23 13:38:30,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:31,288 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2021-11-23 13:38:31,289 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2021-11-23 13:38:31,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1255 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2021-11-23 13:38:31,293 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2021-11-23 13:38:31,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2021-11-23 13:38:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:38:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-23 13:38:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-11-23 13:38:31,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2021-11-23 13:38:31,297 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-11-23 13:38:31,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-11-23 13:38:31,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:31,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-11-23 13:38:31,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:31,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:31,304 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:31,304 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2021-11-23 13:38:31,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2021-11-23 13:38:31,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-11-23 13:38:31,310 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2021-11-23 13:38:31,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2021-11-23 13:38:31,311 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2021-11-23 13:38:31,312 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2021-11-23 13:38:31,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:31,313 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:31,313 INFO L254 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] [2021-11-23 13:38:31,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:38:31,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:31,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2021-11-23 13:38:31,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:31,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251890421] [2021-11-23 13:38:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:31,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:31,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251890421] [2021-11-23 13:38:31,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251890421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:38:31,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:38:31,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 13:38:31,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444028445] [2021-11-23 13:38:31,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:38:31,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:38:31,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:31,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:38:31,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:38:31,678 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-23 13:38:31,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:31,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:31,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-23 13:38:31,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:32,135 INFO L129 PetriNetUnfolder]: 68/250 cut-off events. [2021-11-23 13:38:32,136 INFO L130 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2021-11-23 13:38:32,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 250 events. 68/250 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1003 event pairs, 34 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 620. Up to 105 conditions per place. [2021-11-23 13:38:32,139 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2021-11-23 13:38:32,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2021-11-23 13:38:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:38:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-23 13:38:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2021-11-23 13:38:32,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2021-11-23 13:38:32,143 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2021-11-23 13:38:32,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2021-11-23 13:38:32,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:32,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2021-11-23 13:38:32,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:32,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:32,150 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:32,151 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2021-11-23 13:38:32,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2021-11-23 13:38:32,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-11-23 13:38:32,158 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2021-11-23 13:38:32,158 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2021-11-23 13:38:32,159 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2021-11-23 13:38:32,159 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2021-11-23 13:38:32,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:32,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:32,161 INFO L254 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] [2021-11-23 13:38:32,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:38:32,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash 239848237, now seen corresponding path program 1 times [2021-11-23 13:38:32,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492894942] [2021-11-23 13:38:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:32,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:32,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492894942] [2021-11-23 13:38:32,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492894942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072727283] [2021-11-23 13:38:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:32,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:32,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:32,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:32,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:38:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:32,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:38:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:33,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:34,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072727283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:34,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:34,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-23 13:38:34,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030347684] [2021-11-23 13:38:34,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:34,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 13:38:34,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:34,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 13:38:34,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 13:38:34,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:38:34,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:34,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:34,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:38:34,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:37,855 INFO L129 PetriNetUnfolder]: 218/751 cut-off events. [2021-11-23 13:38:37,855 INFO L130 PetriNetUnfolder]: For 418/418 co-relation queries the response was YES. [2021-11-23 13:38:37,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1646 conditions, 751 events. 218/751 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4497 event pairs, 0 based on Foata normal form. 13/764 useless extension candidates. Maximal degree in co-relation 1625. Up to 114 conditions per place. [2021-11-23 13:38:37,864 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 148 selfloop transitions, 115 changer transitions 19/324 dead transitions. [2021-11-23 13:38:37,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 324 transitions, 1705 flow [2021-11-23 13:38:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-23 13:38:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-11-23 13:38:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3816 transitions. [2021-11-23 13:38:37,879 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6305353602115004 [2021-11-23 13:38:37,879 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3816 transitions. [2021-11-23 13:38:37,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3816 transitions. [2021-11-23 13:38:37,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:37,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3816 transitions. [2021-11-23 13:38:37,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 56.11764705882353) internal successors, (3816), 68 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:37,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 89.0) internal successors, (6141), 69 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:37,915 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 89.0) internal successors, (6141), 69 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:37,915 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 68 states and 3816 transitions. [2021-11-23 13:38:37,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 324 transitions, 1705 flow [2021-11-23 13:38:37,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 324 transitions, 1583 flow, removed 32 selfloop flow, removed 16 redundant places. [2021-11-23 13:38:37,927 INFO L242 Difference]: Finished difference. Result has 183 places, 186 transitions, 967 flow [2021-11-23 13:38:37,927 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=967, PETRI_PLACES=183, PETRI_TRANSITIONS=186} [2021-11-23 13:38:37,930 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 104 predicate places. [2021-11-23 13:38:37,930 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 186 transitions, 967 flow [2021-11-23 13:38:37,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:37,931 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:37,931 INFO L254 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] [2021-11-23 13:38:37,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:38,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 13:38:38,145 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1783548781, now seen corresponding path program 2 times [2021-11-23 13:38:38,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:38,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985943597] [2021-11-23 13:38:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:38,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:38,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985943597] [2021-11-23 13:38:38,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985943597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786453654] [2021-11-23 13:38:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:38:38,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:38,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:38,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:38:38,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:38:38,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:38:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:39,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:40,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786453654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:40,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:40,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-23 13:38:40,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684109936] [2021-11-23 13:38:40,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:40,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 13:38:40,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 13:38:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 13:38:40,177 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:38:40,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 186 transitions, 967 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:40,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:40,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:38:40,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:42,336 INFO L129 PetriNetUnfolder]: 267/949 cut-off events. [2021-11-23 13:38:42,336 INFO L130 PetriNetUnfolder]: For 1397/1397 co-relation queries the response was YES. [2021-11-23 13:38:42,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 949 events. 267/949 cut-off events. For 1397/1397 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6112 event pairs, 28 based on Foata normal form. 2/948 useless extension candidates. Maximal degree in co-relation 2804. Up to 293 conditions per place. [2021-11-23 13:38:42,349 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 117 selfloop transitions, 152 changer transitions 12/323 dead transitions. [2021-11-23 13:38:42,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 323 transitions, 2300 flow [2021-11-23 13:38:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 13:38:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-11-23 13:38:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2561 transitions. [2021-11-23 13:38:42,356 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6255495847581827 [2021-11-23 13:38:42,356 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2561 transitions. [2021-11-23 13:38:42,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2561 transitions. [2021-11-23 13:38:42,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:42,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2561 transitions. [2021-11-23 13:38:42,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.67391304347826) internal successors, (2561), 46 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:42,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:42,380 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:42,380 INFO L186 Difference]: Start difference. First operand has 183 places, 186 transitions, 967 flow. Second operand 46 states and 2561 transitions. [2021-11-23 13:38:42,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 323 transitions, 2300 flow [2021-11-23 13:38:42,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 323 transitions, 2099 flow, removed 85 selfloop flow, removed 12 redundant places. [2021-11-23 13:38:42,409 INFO L242 Difference]: Finished difference. Result has 224 places, 251 transitions, 1670 flow [2021-11-23 13:38:42,410 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1670, PETRI_PLACES=224, PETRI_TRANSITIONS=251} [2021-11-23 13:38:42,411 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 145 predicate places. [2021-11-23 13:38:42,413 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 251 transitions, 1670 flow [2021-11-23 13:38:42,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:42,414 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:42,415 INFO L254 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] [2021-11-23 13:38:42,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:42,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:42,642 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash -32159131, now seen corresponding path program 3 times [2021-11-23 13:38:42,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:42,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319368693] [2021-11-23 13:38:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:42,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:42,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:42,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319368693] [2021-11-23 13:38:42,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319368693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:42,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716561467] [2021-11-23 13:38:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:38:42,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:42,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:42,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:38:43,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:38:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:38:43,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:43,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:44,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716561467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:44,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:44,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-23 13:38:44,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15598887] [2021-11-23 13:38:44,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:44,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 13:38:44,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 13:38:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 13:38:44,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:38:44,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 251 transitions, 1670 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:44,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:44,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:38:44,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:51,163 INFO L129 PetriNetUnfolder]: 460/1625 cut-off events. [2021-11-23 13:38:51,163 INFO L130 PetriNetUnfolder]: For 3329/3331 co-relation queries the response was YES. [2021-11-23 13:38:51,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5455 conditions, 1625 events. 460/1625 cut-off events. For 3329/3331 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12566 event pairs, 2 based on Foata normal form. 4/1615 useless extension candidates. Maximal degree in co-relation 5410. Up to 170 conditions per place. [2021-11-23 13:38:51,187 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 215 selfloop transitions, 361 changer transitions 12/630 dead transitions. [2021-11-23 13:38:51,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 630 transitions, 5354 flow [2021-11-23 13:38:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-23 13:38:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-11-23 13:38:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 6149 transitions. [2021-11-23 13:38:51,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6280898876404495 [2021-11-23 13:38:51,212 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 6149 transitions. [2021-11-23 13:38:51,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 6149 transitions. [2021-11-23 13:38:51,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:51,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 6149 transitions. [2021-11-23 13:38:51,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 55.9) internal successors, (6149), 110 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:51,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 89.0) internal successors, (9879), 111 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:51,280 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 89.0) internal successors, (9879), 111 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:51,280 INFO L186 Difference]: Start difference. First operand has 224 places, 251 transitions, 1670 flow. Second operand 110 states and 6149 transitions. [2021-11-23 13:38:51,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 630 transitions, 5354 flow [2021-11-23 13:38:51,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 630 transitions, 5277 flow, removed 32 selfloop flow, removed 11 redundant places. [2021-11-23 13:38:51,338 INFO L242 Difference]: Finished difference. Result has 343 places, 455 transitions, 4222 flow [2021-11-23 13:38:51,339 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=4222, PETRI_PLACES=343, PETRI_TRANSITIONS=455} [2021-11-23 13:38:51,340 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 264 predicate places. [2021-11-23 13:38:51,340 INFO L470 AbstractCegarLoop]: Abstraction has has 343 places, 455 transitions, 4222 flow [2021-11-23 13:38:51,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:51,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:51,342 INFO L254 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] [2021-11-23 13:38:51,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:51,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:38:51,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:38:51,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:51,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1951911381, now seen corresponding path program 4 times [2021-11-23 13:38:51,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:51,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000338121] [2021-11-23 13:38:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:51,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:51,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:51,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000338121] [2021-11-23 13:38:51,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000338121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:51,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520098063] [2021-11-23 13:38:51,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:38:51,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:51,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:51,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:51,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:38:51,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:38:51,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:51,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:38:51,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:52,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:53,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520098063] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:53,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:53,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-23 13:38:53,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454200807] [2021-11-23 13:38:53,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:53,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 13:38:53,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 13:38:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 13:38:53,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:38:53,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 455 transitions, 4222 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:53,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:38:53,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:38:53,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:38:59,687 INFO L129 PetriNetUnfolder]: 629/2102 cut-off events. [2021-11-23 13:38:59,687 INFO L130 PetriNetUnfolder]: For 18038/18040 co-relation queries the response was YES. [2021-11-23 13:38:59,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9886 conditions, 2102 events. 629/2102 cut-off events. For 18038/18040 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16957 event pairs, 8 based on Foata normal form. 4/2094 useless extension candidates. Maximal degree in co-relation 9819. Up to 250 conditions per place. [2021-11-23 13:38:59,719 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 233 selfloop transitions, 499 changer transitions 12/786 dead transitions. [2021-11-23 13:38:59,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 786 transitions, 9130 flow [2021-11-23 13:38:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-23 13:38:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-11-23 13:38:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 6262 transitions. [2021-11-23 13:38:59,734 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6282102728731942 [2021-11-23 13:38:59,735 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 6262 transitions. [2021-11-23 13:38:59,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 6262 transitions. [2021-11-23 13:38:59,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:38:59,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 6262 transitions. [2021-11-23 13:38:59,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 55.910714285714285) internal successors, (6262), 112 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:59,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:59,772 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:59,773 INFO L186 Difference]: Start difference. First operand has 343 places, 455 transitions, 4222 flow. Second operand 112 states and 6262 transitions. [2021-11-23 13:38:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 786 transitions, 9130 flow [2021-11-23 13:38:59,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 786 transitions, 8444 flow, removed 229 selfloop flow, removed 20 redundant places. [2021-11-23 13:38:59,894 INFO L242 Difference]: Finished difference. Result has 443 places, 621 transitions, 6482 flow [2021-11-23 13:38:59,895 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=6482, PETRI_PLACES=443, PETRI_TRANSITIONS=621} [2021-11-23 13:38:59,896 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 364 predicate places. [2021-11-23 13:38:59,896 INFO L470 AbstractCegarLoop]: Abstraction has has 443 places, 621 transitions, 6482 flow [2021-11-23 13:38:59,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:59,897 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:38:59,897 INFO L254 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] [2021-11-23 13:38:59,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 13:39:00,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 13:39:00,105 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash -493992015, now seen corresponding path program 5 times [2021-11-23 13:39:00,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:00,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209650437] [2021-11-23 13:39:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:00,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:00,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209650437] [2021-11-23 13:39:00,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209650437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:00,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186273646] [2021-11-23 13:39:00,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:39:00,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:00,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:00,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:00,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:39:00,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:39:00,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:39:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:01,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:01,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186273646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:01,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:01,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-23 13:39:01,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337408275] [2021-11-23 13:39:01,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:01,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 13:39:01,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 13:39:01,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 13:39:01,923 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:01,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 621 transitions, 6482 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:01,925 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:01,925 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:01,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:03,711 INFO L129 PetriNetUnfolder]: 629/2125 cut-off events. [2021-11-23 13:39:03,711 INFO L130 PetriNetUnfolder]: For 22349/22349 co-relation queries the response was YES. [2021-11-23 13:39:03,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10926 conditions, 2125 events. 629/2125 cut-off events. For 22349/22349 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17243 event pairs, 57 based on Foata normal form. 2/2120 useless extension candidates. Maximal degree in co-relation 10848. Up to 812 conditions per place. [2021-11-23 13:39:03,752 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 247 selfloop transitions, 370 changer transitions 12/671 dead transitions. [2021-11-23 13:39:03,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 671 transitions, 8301 flow [2021-11-23 13:39:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 13:39:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-23 13:39:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2021-11-23 13:39:03,756 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2021-11-23 13:39:03,756 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2021-11-23 13:39:03,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2021-11-23 13:39:03,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:03,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2021-11-23 13:39:03,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:03,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:03,767 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:03,767 INFO L186 Difference]: Start difference. First operand has 443 places, 621 transitions, 6482 flow. Second operand 33 states and 1827 transitions. [2021-11-23 13:39:03,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 671 transitions, 8301 flow [2021-11-23 13:39:03,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 671 transitions, 7552 flow, removed 195 selfloop flow, removed 49 redundant places. [2021-11-23 13:39:03,963 INFO L242 Difference]: Finished difference. Result has 430 places, 635 transitions, 7043 flow [2021-11-23 13:39:03,964 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=5812, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7043, PETRI_PLACES=430, PETRI_TRANSITIONS=635} [2021-11-23 13:39:03,965 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 351 predicate places. [2021-11-23 13:39:03,965 INFO L470 AbstractCegarLoop]: Abstraction has has 430 places, 635 transitions, 7043 flow [2021-11-23 13:39:03,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:03,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:03,966 INFO L254 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] [2021-11-23 13:39:03,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:04,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:04,182 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1407343839, now seen corresponding path program 6 times [2021-11-23 13:39:04,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:04,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456910912] [2021-11-23 13:39:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:04,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:04,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:04,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456910912] [2021-11-23 13:39:04,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456910912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:04,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256969642] [2021-11-23 13:39:04,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:39:04,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:04,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:04,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:04,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:39:04,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-23 13:39:04,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:04,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:39:04,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:05,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:05,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256969642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:05,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:05,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-23 13:39:05,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432571574] [2021-11-23 13:39:05,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:05,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:05,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:39:05,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:05,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 635 transitions, 7043 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:05,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:05,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:05,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:07,546 INFO L129 PetriNetUnfolder]: 628/2117 cut-off events. [2021-11-23 13:39:07,546 INFO L130 PetriNetUnfolder]: For 19697/19697 co-relation queries the response was YES. [2021-11-23 13:39:07,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11026 conditions, 2117 events. 628/2117 cut-off events. For 19697/19697 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17188 event pairs, 72 based on Foata normal form. 2/2108 useless extension candidates. Maximal degree in co-relation 10943. Up to 853 conditions per place. [2021-11-23 13:39:07,580 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 272 selfloop transitions, 353 changer transitions 12/679 dead transitions. [2021-11-23 13:39:07,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 679 transitions, 8782 flow [2021-11-23 13:39:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:39:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-23 13:39:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1878 transitions. [2021-11-23 13:39:07,583 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6206212822207535 [2021-11-23 13:39:07,583 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1878 transitions. [2021-11-23 13:39:07,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1878 transitions. [2021-11-23 13:39:07,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:07,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1878 transitions. [2021-11-23 13:39:07,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.23529411764706) internal successors, (1878), 34 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:07,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:07,595 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:07,595 INFO L186 Difference]: Start difference. First operand has 430 places, 635 transitions, 7043 flow. Second operand 34 states and 1878 transitions. [2021-11-23 13:39:07,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 679 transitions, 8782 flow [2021-11-23 13:39:07,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 679 transitions, 8428 flow, removed 13 selfloop flow, removed 20 redundant places. [2021-11-23 13:39:07,816 INFO L242 Difference]: Finished difference. Result has 450 places, 645 transitions, 7871 flow [2021-11-23 13:39:07,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6700, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7871, PETRI_PLACES=450, PETRI_TRANSITIONS=645} [2021-11-23 13:39:07,818 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 371 predicate places. [2021-11-23 13:39:07,818 INFO L470 AbstractCegarLoop]: Abstraction has has 450 places, 645 transitions, 7871 flow [2021-11-23 13:39:07,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:07,819 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:07,819 INFO L254 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] [2021-11-23 13:39:07,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:08,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:08,039 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash 472468575, now seen corresponding path program 7 times [2021-11-23 13:39:08,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:08,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629102092] [2021-11-23 13:39:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:08,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:08,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:08,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629102092] [2021-11-23 13:39:08,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629102092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:08,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030522725] [2021-11-23 13:39:08,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:39:08,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:08,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:08,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:08,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:39:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:08,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:39:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:08,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:09,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030522725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:09,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:09,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-23 13:39:09,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214014580] [2021-11-23 13:39:09,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:09,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:09,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:39:09,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:09,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 645 transitions, 7871 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:09,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:09,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:09,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:11,793 INFO L129 PetriNetUnfolder]: 647/2358 cut-off events. [2021-11-23 13:39:11,793 INFO L130 PetriNetUnfolder]: For 23620/23620 co-relation queries the response was YES. [2021-11-23 13:39:11,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12414 conditions, 2358 events. 647/2358 cut-off events. For 23620/23620 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 20216 event pairs, 68 based on Foata normal form. 2/2356 useless extension candidates. Maximal degree in co-relation 12324. Up to 855 conditions per place. [2021-11-23 13:39:11,833 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 267 selfloop transitions, 392 changer transitions 12/713 dead transitions. [2021-11-23 13:39:11,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 713 transitions, 9953 flow [2021-11-23 13:39:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 13:39:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-23 13:39:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2158 transitions. [2021-11-23 13:39:11,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6217228464419475 [2021-11-23 13:39:11,837 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2158 transitions. [2021-11-23 13:39:11,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2158 transitions. [2021-11-23 13:39:11,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:11,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2158 transitions. [2021-11-23 13:39:11,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.333333333333336) internal successors, (2158), 39 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:11,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:11,848 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:11,848 INFO L186 Difference]: Start difference. First operand has 450 places, 645 transitions, 7871 flow. Second operand 39 states and 2158 transitions. [2021-11-23 13:39:11,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 713 transitions, 9953 flow [2021-11-23 13:39:12,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 713 transitions, 9628 flow, removed 15 selfloop flow, removed 18 redundant places. [2021-11-23 13:39:12,042 INFO L242 Difference]: Finished difference. Result has 476 places, 669 transitions, 9228 flow [2021-11-23 13:39:12,043 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=7548, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9228, PETRI_PLACES=476, PETRI_TRANSITIONS=669} [2021-11-23 13:39:12,044 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 397 predicate places. [2021-11-23 13:39:12,044 INFO L470 AbstractCegarLoop]: Abstraction has has 476 places, 669 transitions, 9228 flow [2021-11-23 13:39:12,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:12,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:12,045 INFO L254 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] [2021-11-23 13:39:12,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:12,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 13:39:12,270 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1771949071, now seen corresponding path program 8 times [2021-11-23 13:39:12,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:12,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699724953] [2021-11-23 13:39:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:12,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:12,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:12,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699724953] [2021-11-23 13:39:12,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699724953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:12,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042902999] [2021-11-23 13:39:12,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:39:12,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:12,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:12,508 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:12,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:39:12,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:39:12,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:39:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:13,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:13,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042902999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:13,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:13,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-23 13:39:13,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237724800] [2021-11-23 13:39:13,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:13,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:13,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:39:13,857 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:13,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 669 transitions, 9228 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:13,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:13,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:13,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:15,570 INFO L129 PetriNetUnfolder]: 647/2372 cut-off events. [2021-11-23 13:39:15,570 INFO L130 PetriNetUnfolder]: For 28315/28315 co-relation queries the response was YES. [2021-11-23 13:39:15,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13455 conditions, 2372 events. 647/2372 cut-off events. For 28315/28315 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 20332 event pairs, 84 based on Foata normal form. 2/2359 useless extension candidates. Maximal degree in co-relation 13358. Up to 841 conditions per place. [2021-11-23 13:39:15,601 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 281 selfloop transitions, 378 changer transitions 12/713 dead transitions. [2021-11-23 13:39:15,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 713 transitions, 11046 flow [2021-11-23 13:39:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 13:39:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-23 13:39:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1820 transitions. [2021-11-23 13:39:15,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6196799455226422 [2021-11-23 13:39:15,605 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1820 transitions. [2021-11-23 13:39:15,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1820 transitions. [2021-11-23 13:39:15,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:15,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1820 transitions. [2021-11-23 13:39:15,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.15151515151515) internal successors, (1820), 33 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:15,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:15,614 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:15,614 INFO L186 Difference]: Start difference. First operand has 476 places, 669 transitions, 9228 flow. Second operand 33 states and 1820 transitions. [2021-11-23 13:39:15,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 713 transitions, 11046 flow [2021-11-23 13:39:15,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 713 transitions, 10833 flow, removed 47 selfloop flow, removed 21 redundant places. [2021-11-23 13:39:15,854 INFO L242 Difference]: Finished difference. Result has 492 places, 682 transitions, 10286 flow [2021-11-23 13:39:15,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10286, PETRI_PLACES=492, PETRI_TRANSITIONS=682} [2021-11-23 13:39:15,856 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 413 predicate places. [2021-11-23 13:39:15,857 INFO L470 AbstractCegarLoop]: Abstraction has has 492 places, 682 transitions, 10286 flow [2021-11-23 13:39:15,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:15,857 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:15,857 INFO L254 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] [2021-11-23 13:39:15,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:16,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 13:39:16,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash -486059931, now seen corresponding path program 9 times [2021-11-23 13:39:16,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:16,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430668526] [2021-11-23 13:39:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:16,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:16,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:16,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430668526] [2021-11-23 13:39:16,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430668526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:16,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035249113] [2021-11-23 13:39:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:39:16,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:16,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:16,366 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:16,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:39:16,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:39:16,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:39:16,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:17,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:17,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035249113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:17,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:17,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-23 13:39:17,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192469161] [2021-11-23 13:39:17,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:17,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:17,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:39:17,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:17,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 682 transitions, 10286 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:17,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:17,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:17,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:24,512 INFO L129 PetriNetUnfolder]: 830/2962 cut-off events. [2021-11-23 13:39:24,512 INFO L130 PetriNetUnfolder]: For 37140/37140 co-relation queries the response was YES. [2021-11-23 13:39:24,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17343 conditions, 2962 events. 830/2962 cut-off events. For 37140/37140 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 26674 event pairs, 67 based on Foata normal form. 2/2960 useless extension candidates. Maximal degree in co-relation 17237. Up to 728 conditions per place. [2021-11-23 13:39:24,554 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 268 selfloop transitions, 671 changer transitions 12/993 dead transitions. [2021-11-23 13:39:24,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 993 transitions, 16460 flow [2021-11-23 13:39:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-23 13:39:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-11-23 13:39:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 5860 transitions. [2021-11-23 13:39:24,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6211575153699386 [2021-11-23 13:39:24,563 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 5860 transitions. [2021-11-23 13:39:24,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 5860 transitions. [2021-11-23 13:39:24,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:24,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 5860 transitions. [2021-11-23 13:39:24,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 55.283018867924525) internal successors, (5860), 106 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:24,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 89.0) internal successors, (9523), 107 states have internal predecessors, (9523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:24,591 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 89.0) internal successors, (9523), 107 states have internal predecessors, (9523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:24,593 INFO L186 Difference]: Start difference. First operand has 492 places, 682 transitions, 10286 flow. Second operand 106 states and 5860 transitions. [2021-11-23 13:39:24,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 993 transitions, 16460 flow [2021-11-23 13:39:24,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 993 transitions, 16286 flow, removed 31 selfloop flow, removed 15 redundant places. [2021-11-23 13:39:24,878 INFO L242 Difference]: Finished difference. Result has 587 places, 901 transitions, 15747 flow [2021-11-23 13:39:24,879 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=10164, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=15747, PETRI_PLACES=587, PETRI_TRANSITIONS=901} [2021-11-23 13:39:24,879 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 508 predicate places. [2021-11-23 13:39:24,880 INFO L470 AbstractCegarLoop]: Abstraction has has 587 places, 901 transitions, 15747 flow [2021-11-23 13:39:24,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:24,880 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:24,880 INFO L254 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] [2021-11-23 13:39:24,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:25,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 13:39:25,102 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:25,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:25,102 INFO L85 PathProgramCache]: Analyzing trace with hash 205857195, now seen corresponding path program 10 times [2021-11-23 13:39:25,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:25,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375763620] [2021-11-23 13:39:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:25,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:25,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375763620] [2021-11-23 13:39:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375763620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676549852] [2021-11-23 13:39:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:39:25,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:25,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:25,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:39:25,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:39:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:39:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:25,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676549852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:26,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:26,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-23 13:39:26,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398184449] [2021-11-23 13:39:26,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:26,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:26,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:26,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:39:26,572 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:26,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 901 transitions, 15747 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:26,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:26,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:26,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:28,975 INFO L129 PetriNetUnfolder]: 830/2922 cut-off events. [2021-11-23 13:39:28,975 INFO L130 PetriNetUnfolder]: For 42248/42248 co-relation queries the response was YES. [2021-11-23 13:39:29,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18932 conditions, 2922 events. 830/2922 cut-off events. For 42248/42248 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 26159 event pairs, 90 based on Foata normal form. 2/2906 useless extension candidates. Maximal degree in co-relation 18820. Up to 1105 conditions per place. [2021-11-23 13:39:29,021 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 388 selfloop transitions, 501 changer transitions 12/943 dead transitions. [2021-11-23 13:39:29,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 943 transitions, 18086 flow [2021-11-23 13:39:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 13:39:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-23 13:39:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2041 transitions. [2021-11-23 13:39:29,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6197995748557547 [2021-11-23 13:39:29,025 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2041 transitions. [2021-11-23 13:39:29,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2041 transitions. [2021-11-23 13:39:29,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:29,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2041 transitions. [2021-11-23 13:39:29,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.16216216216216) internal successors, (2041), 37 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:29,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:29,036 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:29,036 INFO L186 Difference]: Start difference. First operand has 587 places, 901 transitions, 15747 flow. Second operand 37 states and 2041 transitions. [2021-11-23 13:39:29,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 943 transitions, 18086 flow [2021-11-23 13:39:29,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 943 transitions, 16459 flow, removed 532 selfloop flow, removed 34 redundant places. [2021-11-23 13:39:29,486 INFO L242 Difference]: Finished difference. Result has 596 places, 911 transitions, 15801 flow [2021-11-23 13:39:29,488 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=14213, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=15801, PETRI_PLACES=596, PETRI_TRANSITIONS=911} [2021-11-23 13:39:29,489 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 517 predicate places. [2021-11-23 13:39:29,489 INFO L470 AbstractCegarLoop]: Abstraction has has 596 places, 911 transitions, 15801 flow [2021-11-23 13:39:29,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:29,489 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:29,490 INFO L254 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] [2021-11-23 13:39:29,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-23 13:39:29,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 13:39:29,718 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash 274486639, now seen corresponding path program 11 times [2021-11-23 13:39:29,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:29,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530007505] [2021-11-23 13:39:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:29,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:30,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:30,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530007505] [2021-11-23 13:39:30,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530007505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:30,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77179580] [2021-11-23 13:39:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:39:30,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:30,007 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:30,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:39:30,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:39:30,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:30,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:39:30,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:30,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:31,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77179580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:31,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:31,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-23 13:39:31,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727277364] [2021-11-23 13:39:31,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:31,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:31,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:31,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:39:31,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:31,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 911 transitions, 15801 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:31,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:31,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:31,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:36,042 INFO L129 PetriNetUnfolder]: 1043/3529 cut-off events. [2021-11-23 13:39:36,042 INFO L130 PetriNetUnfolder]: For 39874/39874 co-relation queries the response was YES. [2021-11-23 13:39:36,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21406 conditions, 3529 events. 1043/3529 cut-off events. For 39874/39874 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 32493 event pairs, 53 based on Foata normal form. 2/3527 useless extension candidates. Maximal degree in co-relation 21286. Up to 800 conditions per place. [2021-11-23 13:39:36,105 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 394 selfloop transitions, 758 changer transitions 12/1206 dead transitions. [2021-11-23 13:39:36,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1206 transitions, 22034 flow [2021-11-23 13:39:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-23 13:39:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-11-23 13:39:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4182 transitions. [2021-11-23 13:39:36,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6349832979046462 [2021-11-23 13:39:36,112 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4182 transitions. [2021-11-23 13:39:36,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4182 transitions. [2021-11-23 13:39:36,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:36,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4182 transitions. [2021-11-23 13:39:36,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 56.513513513513516) internal successors, (4182), 74 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:36,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 89.0) internal successors, (6675), 75 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:36,129 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 89.0) internal successors, (6675), 75 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:36,129 INFO L186 Difference]: Start difference. First operand has 596 places, 911 transitions, 15801 flow. Second operand 74 states and 4182 transitions. [2021-11-23 13:39:36,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1206 transitions, 22034 flow [2021-11-23 13:39:36,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1206 transitions, 21370 flow, removed 17 selfloop flow, removed 23 redundant places. [2021-11-23 13:39:36,540 INFO L242 Difference]: Finished difference. Result has 658 places, 1080 transitions, 20566 flow [2021-11-23 13:39:36,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=15227, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=20566, PETRI_PLACES=658, PETRI_TRANSITIONS=1080} [2021-11-23 13:39:36,542 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 579 predicate places. [2021-11-23 13:39:36,542 INFO L470 AbstractCegarLoop]: Abstraction has has 658 places, 1080 transitions, 20566 flow [2021-11-23 13:39:36,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:36,543 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:36,543 INFO L254 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] [2021-11-23 13:39:36,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 13:39:36,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 13:39:36,750 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:36,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1193864843, now seen corresponding path program 12 times [2021-11-23 13:39:36,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:36,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636894508] [2021-11-23 13:39:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:36,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:36,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:36,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636894508] [2021-11-23 13:39:36,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636894508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:36,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898495139] [2021-11-23 13:39:36,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:39:36,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:36,978 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:37,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:39:37,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-23 13:39:37,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:37,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:39:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:37,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:38,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898495139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:38,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:38,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-23 13:39:38,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100120750] [2021-11-23 13:39:38,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:38,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:38,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:39:38,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:38,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 1080 transitions, 20566 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:38,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:38,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:38,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:41,294 INFO L129 PetriNetUnfolder]: 1041/3501 cut-off events. [2021-11-23 13:39:41,294 INFO L130 PetriNetUnfolder]: For 45387/45399 co-relation queries the response was YES. [2021-11-23 13:39:41,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22811 conditions, 3501 events. 1041/3501 cut-off events. For 45387/45399 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 32069 event pairs, 149 based on Foata normal form. 4/3499 useless extension candidates. Maximal degree in co-relation 22679. Up to 1524 conditions per place. [2021-11-23 13:39:41,515 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 465 selfloop transitions, 590 changer transitions 6/1103 dead transitions. [2021-11-23 13:39:41,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 1103 transitions, 22913 flow [2021-11-23 13:39:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 13:39:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-23 13:39:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2021-11-23 13:39:41,518 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2021-11-23 13:39:41,518 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2021-11-23 13:39:41,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2021-11-23 13:39:41,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:41,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2021-11-23 13:39:41,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:41,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:41,525 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:41,525 INFO L186 Difference]: Start difference. First operand has 658 places, 1080 transitions, 20566 flow. Second operand 33 states and 1827 transitions. [2021-11-23 13:39:41,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 1103 transitions, 22913 flow [2021-11-23 13:39:42,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1103 transitions, 22389 flow, removed 188 selfloop flow, removed 22 redundant places. [2021-11-23 13:39:42,165 INFO L242 Difference]: Finished difference. Result has 657 places, 1082 transitions, 21325 flow [2021-11-23 13:39:42,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=20036, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=585, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21325, PETRI_PLACES=657, PETRI_TRANSITIONS=1082} [2021-11-23 13:39:42,167 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 578 predicate places. [2021-11-23 13:39:42,167 INFO L470 AbstractCegarLoop]: Abstraction has has 657 places, 1082 transitions, 21325 flow [2021-11-23 13:39:42,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:42,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:42,167 INFO L254 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] [2021-11-23 13:39:42,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:42,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:42,368 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:42,368 INFO L85 PathProgramCache]: Analyzing trace with hash 420580843, now seen corresponding path program 1 times [2021-11-23 13:39:42,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:42,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392250500] [2021-11-23 13:39:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:42,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:42,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392250500] [2021-11-23 13:39:42,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392250500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112276695] [2021-11-23 13:39:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:42,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:42,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:42,628 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:42,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:39:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:42,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 13:39:42,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:43,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:43,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112276695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:43,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:43,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2021-11-23 13:39:43,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260049464] [2021-11-23 13:39:43,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:43,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:39:43,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:39:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:39:43,725 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-11-23 13:39:43,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 1082 transitions, 21325 flow. Second operand has 37 states, 37 states have (on average 52.648648648648646) internal successors, (1948), 37 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:43,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:43,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-11-23 13:39:43,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:46,897 INFO L129 PetriNetUnfolder]: 1157/3673 cut-off events. [2021-11-23 13:39:46,897 INFO L130 PetriNetUnfolder]: For 51257/51267 co-relation queries the response was YES. [2021-11-23 13:39:46,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24522 conditions, 3673 events. 1157/3673 cut-off events. For 51257/51267 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 33233 event pairs, 140 based on Foata normal form. 7/3666 useless extension candidates. Maximal degree in co-relation 24391. Up to 1166 conditions per place. [2021-11-23 13:39:46,961 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 474 selfloop transitions, 647 changer transitions 27/1189 dead transitions. [2021-11-23 13:39:46,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1189 transitions, 24597 flow [2021-11-23 13:39:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 13:39:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-11-23 13:39:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3004 transitions. [2021-11-23 13:39:46,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6250520183104453 [2021-11-23 13:39:46,967 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3004 transitions. [2021-11-23 13:39:46,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3004 transitions. [2021-11-23 13:39:46,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:46,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3004 transitions. [2021-11-23 13:39:46,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.629629629629626) internal successors, (3004), 54 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:46,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:46,981 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:46,981 INFO L186 Difference]: Start difference. First operand has 657 places, 1082 transitions, 21325 flow. Second operand 54 states and 3004 transitions. [2021-11-23 13:39:46,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1189 transitions, 24597 flow [2021-11-23 13:39:47,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1189 transitions, 24273 flow, removed 35 selfloop flow, removed 23 redundant places. [2021-11-23 13:39:47,503 INFO L242 Difference]: Finished difference. Result has 695 places, 1082 transitions, 22406 flow [2021-11-23 13:39:47,504 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=21049, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=641, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=22406, PETRI_PLACES=695, PETRI_TRANSITIONS=1082} [2021-11-23 13:39:47,504 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 616 predicate places. [2021-11-23 13:39:47,505 INFO L470 AbstractCegarLoop]: Abstraction has has 695 places, 1082 transitions, 22406 flow [2021-11-23 13:39:47,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.648648648648646) internal successors, (1948), 37 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:47,505 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:47,505 INFO L254 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] [2021-11-23 13:39:47,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:47,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:47,815 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash 587193009, now seen corresponding path program 13 times [2021-11-23 13:39:47,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:47,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907454743] [2021-11-23 13:39:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:47,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:48,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:48,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907454743] [2021-11-23 13:39:48,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907454743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:48,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506376084] [2021-11-23 13:39:48,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:39:48,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:48,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:48,122 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:48,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:39:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:48,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:39:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:48,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:49,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506376084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:49,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:49,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-23 13:39:49,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688026671] [2021-11-23 13:39:49,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:49,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 13:39:49,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 13:39:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:39:49,757 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:39:49,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 1082 transitions, 22406 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:49,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:39:49,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:39:49,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:39:57,994 INFO L129 PetriNetUnfolder]: 1530/4961 cut-off events. [2021-11-23 13:39:57,995 INFO L130 PetriNetUnfolder]: For 85633/85643 co-relation queries the response was YES. [2021-11-23 13:39:58,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36547 conditions, 4961 events. 1530/4961 cut-off events. For 85633/85643 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 48187 event pairs, 109 based on Foata normal form. 58/4999 useless extension candidates. Maximal degree in co-relation 36404. Up to 778 conditions per place. [2021-11-23 13:39:58,093 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 549 selfloop transitions, 1097 changer transitions 31/1720 dead transitions. [2021-11-23 13:39:58,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 797 places, 1720 transitions, 38141 flow [2021-11-23 13:39:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-23 13:39:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-11-23 13:39:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 6660 transitions. [2021-11-23 13:39:58,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6288358039845151 [2021-11-23 13:39:58,102 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 6660 transitions. [2021-11-23 13:39:58,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 6660 transitions. [2021-11-23 13:39:58,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:39:58,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 6660 transitions. [2021-11-23 13:39:58,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 55.96638655462185) internal successors, (6660), 119 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:58,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 89.0) internal successors, (10680), 120 states have internal predecessors, (10680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:58,128 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 89.0) internal successors, (10680), 120 states have internal predecessors, (10680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:58,128 INFO L186 Difference]: Start difference. First operand has 695 places, 1082 transitions, 22406 flow. Second operand 119 states and 6660 transitions. [2021-11-23 13:39:58,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 797 places, 1720 transitions, 38141 flow [2021-11-23 13:39:59,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 1720 transitions, 36191 flow, removed 140 selfloop flow, removed 42 redundant places. [2021-11-23 13:39:59,116 INFO L242 Difference]: Finished difference. Result has 778 places, 1447 transitions, 32528 flow [2021-11-23 13:39:59,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=21157, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=750, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=32528, PETRI_PLACES=778, PETRI_TRANSITIONS=1447} [2021-11-23 13:39:59,118 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 699 predicate places. [2021-11-23 13:39:59,118 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 1447 transitions, 32528 flow [2021-11-23 13:39:59,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:59,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:39:59,119 INFO L254 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] [2021-11-23 13:39:59,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:59,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:59,346 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:39:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:59,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1710333499, now seen corresponding path program 14 times [2021-11-23 13:39:59,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:59,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212736984] [2021-11-23 13:39:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:59,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:59,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212736984] [2021-11-23 13:39:59,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212736984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:59,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333344571] [2021-11-23 13:39:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:39:59,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:59,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:59,705 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:39:59,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:39:59,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:59,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:39:59,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:00,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:01,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333344571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:01,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:01,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-23 13:40:01,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392169134] [2021-11-23 13:40:01,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:01,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 13:40:01,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:01,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 13:40:01,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:40:01,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:40:01,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1447 transitions, 32528 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:01,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:40:01,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:40:01,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:40:17,459 INFO L129 PetriNetUnfolder]: 2707/8385 cut-off events. [2021-11-23 13:40:17,459 INFO L130 PetriNetUnfolder]: For 172560/172572 co-relation queries the response was YES. [2021-11-23 13:40:17,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65724 conditions, 8385 events. 2707/8385 cut-off events. For 172560/172572 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 89516 event pairs, 152 based on Foata normal form. 7/8362 useless extension candidates. Maximal degree in co-relation 65569. Up to 1433 conditions per place. [2021-11-23 13:40:17,671 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 766 selfloop transitions, 2129 changer transitions 12/2950 dead transitions. [2021-11-23 13:40:17,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 2950 transitions, 70848 flow [2021-11-23 13:40:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-23 13:40:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-11-23 13:40:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 10638 transitions. [2021-11-23 13:40:17,684 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6290952099349497 [2021-11-23 13:40:17,684 INFO L72 ComplementDD]: Start complementDD. Operand 190 states and 10638 transitions. [2021-11-23 13:40:17,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 190 states and 10638 transitions. [2021-11-23 13:40:17,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:40:17,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 190 states and 10638 transitions. [2021-11-23 13:40:17,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 191 states, 190 states have (on average 55.98947368421052) internal successors, (10638), 190 states have internal predecessors, (10638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:17,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 191 states, 191 states have (on average 89.0) internal successors, (16999), 191 states have internal predecessors, (16999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:17,724 INFO L81 ComplementDD]: Finished complementDD. Result has 191 states, 191 states have (on average 89.0) internal successors, (16999), 191 states have internal predecessors, (16999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:17,724 INFO L186 Difference]: Start difference. First operand has 778 places, 1447 transitions, 32528 flow. Second operand 190 states and 10638 transitions. [2021-11-23 13:40:17,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 960 places, 2950 transitions, 70848 flow [2021-11-23 13:40:19,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 918 places, 2950 transitions, 68862 flow, removed 437 selfloop flow, removed 42 redundant places. [2021-11-23 13:40:20,003 INFO L242 Difference]: Finished difference. Result has 967 places, 2581 transitions, 64446 flow [2021-11-23 13:40:20,005 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31283, PETRI_DIFFERENCE_MINUEND_PLACES=729, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=190, PETRI_FLOW=64446, PETRI_PLACES=967, PETRI_TRANSITIONS=2581} [2021-11-23 13:40:20,006 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 888 predicate places. [2021-11-23 13:40:20,006 INFO L470 AbstractCegarLoop]: Abstraction has has 967 places, 2581 transitions, 64446 flow [2021-11-23 13:40:20,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:20,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:40:20,007 INFO L254 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] [2021-11-23 13:40:20,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:20,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 13:40:20,222 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:40:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash 670468717, now seen corresponding path program 15 times [2021-11-23 13:40:20,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:20,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629518069] [2021-11-23 13:40:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:20,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:20,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:20,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629518069] [2021-11-23 13:40:20,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629518069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138793301] [2021-11-23 13:40:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:40:20,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:20,554 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:20,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 13:40:20,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 13:40:20,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:20,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:40:20,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:21,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:22,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138793301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:22,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:22,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-23 13:40:22,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144414692] [2021-11-23 13:40:22,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:22,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 13:40:22,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:22,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 13:40:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:40:22,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:40:22,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 967 places, 2581 transitions, 64446 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:22,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:40:22,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:40:22,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:40:55,579 INFO L129 PetriNetUnfolder]: 3917/11968 cut-off events. [2021-11-23 13:40:55,579 INFO L130 PetriNetUnfolder]: For 286515/286531 co-relation queries the response was YES. [2021-11-23 13:40:55,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101264 conditions, 11968 events. 3917/11968 cut-off events. For 286515/286531 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 135906 event pairs, 143 based on Foata normal form. 9/11960 useless extension candidates. Maximal degree in co-relation 101072. Up to 2071 conditions per place. [2021-11-23 13:40:56,032 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 637 selfloop transitions, 3521 changer transitions 13/4214 dead transitions. [2021-11-23 13:40:56,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1258 places, 4214 transitions, 110755 flow [2021-11-23 13:40:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 298 states. [2021-11-23 13:40:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2021-11-23 13:40:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 16573 transitions. [2021-11-23 13:40:56,051 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6248774602217028 [2021-11-23 13:40:56,051 INFO L72 ComplementDD]: Start complementDD. Operand 298 states and 16573 transitions. [2021-11-23 13:40:56,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 298 states and 16573 transitions. [2021-11-23 13:40:56,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:40:56,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 298 states and 16573 transitions. [2021-11-23 13:40:56,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 299 states, 298 states have (on average 55.61409395973154) internal successors, (16573), 298 states have internal predecessors, (16573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:56,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 299 states, 299 states have (on average 89.0) internal successors, (26611), 299 states have internal predecessors, (26611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:56,109 INFO L81 ComplementDD]: Finished complementDD. Result has 299 states, 299 states have (on average 89.0) internal successors, (26611), 299 states have internal predecessors, (26611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:56,109 INFO L186 Difference]: Start difference. First operand has 967 places, 2581 transitions, 64446 flow. Second operand 298 states and 16573 transitions. [2021-11-23 13:40:56,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1258 places, 4214 transitions, 110755 flow [2021-11-23 13:41:00,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1235 places, 4214 transitions, 108875 flow, removed 718 selfloop flow, removed 23 redundant places. [2021-11-23 13:41:00,345 INFO L242 Difference]: Finished difference. Result has 1302 places, 3817 transitions, 105270 flow [2021-11-23 13:41:00,347 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=63258, PETRI_DIFFERENCE_MINUEND_PLACES=938, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=298, PETRI_FLOW=105270, PETRI_PLACES=1302, PETRI_TRANSITIONS=3817} [2021-11-23 13:41:00,347 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1223 predicate places. [2021-11-23 13:41:00,348 INFO L470 AbstractCegarLoop]: Abstraction has has 1302 places, 3817 transitions, 105270 flow [2021-11-23 13:41:00,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:00,348 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:41:00,348 INFO L254 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] [2021-11-23 13:41:00,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:41:00,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 13:41:00,549 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:41:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1524500933, now seen corresponding path program 16 times [2021-11-23 13:41:00,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:00,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826165935] [2021-11-23 13:41:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:00,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:41:00,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:00,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826165935] [2021-11-23 13:41:00,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826165935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:00,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646664927] [2021-11-23 13:41:00,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:41:00,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:00,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:00,845 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:00,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 13:41:00,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:41:00,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:41:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:41:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:41:01,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:41:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646664927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:41:02,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:41:02,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-23 13:41:02,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964586105] [2021-11-23 13:41:02,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:41:02,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 13:41:02,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:02,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 13:41:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:41:02,400 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:41:02,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1302 places, 3817 transitions, 105270 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:02,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:41:02,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:41:02,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:41:26,714 INFO L129 PetriNetUnfolder]: 4226/12663 cut-off events. [2021-11-23 13:41:26,715 INFO L130 PetriNetUnfolder]: For 398891/398903 co-relation queries the response was YES. [2021-11-23 13:41:27,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120563 conditions, 12663 events. 4226/12663 cut-off events. For 398891/398903 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 144158 event pairs, 334 based on Foata normal form. 7/12627 useless extension candidates. Maximal degree in co-relation 120313. Up to 4022 conditions per place. [2021-11-23 13:41:27,512 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1287 selfloop transitions, 2970 changer transitions 12/4312 dead transitions. [2021-11-23 13:41:27,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1402 places, 4312 transitions, 126320 flow [2021-11-23 13:41:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-23 13:41:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-11-23 13:41:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2021-11-23 13:41:27,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2021-11-23 13:41:27,519 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2021-11-23 13:41:27,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2021-11-23 13:41:27,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:41:27,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2021-11-23 13:41:27,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:27,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:27,543 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:27,543 INFO L186 Difference]: Start difference. First operand has 1302 places, 3817 transitions, 105270 flow. Second operand 107 states and 5929 transitions. [2021-11-23 13:41:27,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1402 places, 4312 transitions, 126320 flow [2021-11-23 13:41:35,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1359 places, 4312 transitions, 123457 flow, removed 995 selfloop flow, removed 43 redundant places. [2021-11-23 13:41:35,822 INFO L242 Difference]: Finished difference. Result has 1384 places, 4176 transitions, 121621 flow [2021-11-23 13:41:35,826 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=102676, PETRI_DIFFERENCE_MINUEND_PLACES=1253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=121621, PETRI_PLACES=1384, PETRI_TRANSITIONS=4176} [2021-11-23 13:41:35,827 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1305 predicate places. [2021-11-23 13:41:35,827 INFO L470 AbstractCegarLoop]: Abstraction has has 1384 places, 4176 transitions, 121621 flow [2021-11-23 13:41:35,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:35,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:41:35,828 INFO L254 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] [2021-11-23 13:41:35,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 13:41:36,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:36,038 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:41:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:36,038 INFO L85 PathProgramCache]: Analyzing trace with hash -30530963, now seen corresponding path program 17 times [2021-11-23 13:41:36,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:36,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756358639] [2021-11-23 13:41:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:36,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:41:36,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:36,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756358639] [2021-11-23 13:41:36,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756358639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:36,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953758491] [2021-11-23 13:41:36,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:41:36,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:36,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:36,329 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:36,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 13:41:36,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-23 13:41:36,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:41:36,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:41:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:41:37,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:41:37,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953758491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:41:37,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:41:37,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-23 13:41:37,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548968522] [2021-11-23 13:41:37,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:41:37,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 13:41:37,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 13:41:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:41:37,901 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:41:37,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1384 places, 4176 transitions, 121621 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:37,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:41:37,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:41:37,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:42:06,898 INFO L129 PetriNetUnfolder]: 4798/14085 cut-off events. [2021-11-23 13:42:06,898 INFO L130 PetriNetUnfolder]: For 494452/494464 co-relation queries the response was YES. [2021-11-23 13:42:07,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141811 conditions, 14085 events. 4798/14085 cut-off events. For 494452/494464 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 161555 event pairs, 347 based on Foata normal form. 8/14047 useless extension candidates. Maximal degree in co-relation 141547. Up to 4160 conditions per place. [2021-11-23 13:42:07,745 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1288 selfloop transitions, 3635 changer transitions 15/4981 dead transitions. [2021-11-23 13:42:07,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1499 places, 4981 transitions, 155204 flow [2021-11-23 13:42:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-23 13:42:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-11-23 13:42:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6759 transitions. [2021-11-23 13:42:07,750 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6224903297108123 [2021-11-23 13:42:07,750 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6759 transitions. [2021-11-23 13:42:07,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6759 transitions. [2021-11-23 13:42:07,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:42:07,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6759 transitions. [2021-11-23 13:42:07,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 55.40163934426229) internal successors, (6759), 122 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:07,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:07,766 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:07,767 INFO L186 Difference]: Start difference. First operand has 1384 places, 4176 transitions, 121621 flow. Second operand 122 states and 6759 transitions. [2021-11-23 13:42:07,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1499 places, 4981 transitions, 155204 flow [2021-11-23 13:42:18,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1464 places, 4981 transitions, 154275 flow, removed 125 selfloop flow, removed 35 redundant places. [2021-11-23 13:42:18,432 INFO L242 Difference]: Finished difference. Result has 1493 places, 4850 transitions, 153849 flow [2021-11-23 13:42:18,436 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=120872, PETRI_DIFFERENCE_MINUEND_PLACES=1343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2963, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1042, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=153849, PETRI_PLACES=1493, PETRI_TRANSITIONS=4850} [2021-11-23 13:42:18,437 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1414 predicate places. [2021-11-23 13:42:18,437 INFO L470 AbstractCegarLoop]: Abstraction has has 1493 places, 4850 transitions, 153849 flow [2021-11-23 13:42:18,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:18,438 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:42:18,438 INFO L254 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] [2021-11-23 13:42:18,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:42:18,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:18,650 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 13:42:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash -243325665, now seen corresponding path program 18 times [2021-11-23 13:42:18,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086953777] [2021-11-23 13:42:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:18,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:42:18,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086953777] [2021-11-23 13:42:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086953777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:42:18,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000801335] [2021-11-23 13:42:18,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:42:18,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:18,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:42:18,977 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:42:18,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_573ca833-cc29-453e-bb3c-cc6dd99d122b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 13:42:19,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-23 13:42:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:42:19,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:42:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:42:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:42:19,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:42:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:42:20,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000801335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:42:20,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:42:20,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-23 13:42:20,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723724945] [2021-11-23 13:42:20,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:42:20,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 13:42:20,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 13:42:20,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:42:20,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-23 13:42:20,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1493 places, 4850 transitions, 153849 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:20,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:42:20,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-23 13:42:20,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand