./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0 --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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:05:25,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:05:25,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:05:25,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:05:25,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:05:25,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:05:25,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:05:25,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:05:25,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:05:25,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:05:25,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:05:25,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:05:25,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:05:25,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:05:25,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:05:25,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:05:25,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:05:25,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:05:25,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:05:25,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:05:25,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:05:25,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:05:25,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:05:25,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:05:25,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:05:25,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:05:25,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:05:25,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:05:25,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:05:25,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:05:25,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:05:25,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:05:25,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:05:25,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:05:25,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:05:25,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:05:25,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:05:25,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:05:25,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:05:25,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:05:25,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:05:25,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:05:25,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:05:25,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:05:25,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:05:25,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:05:25,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:05:25,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:05:25,963 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:05:25,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:05:25,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:05:25,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:05:25,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:05:25,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:05:25,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:05:25,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:05:25,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:05:25,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:05:25,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:05:25,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:05:25,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:05:25,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:05:25,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:05:25,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:05:25,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:05:25,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:05:25,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:05:25,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:05:25,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:05:25,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:05:25,968 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:05:25,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:05:25,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:05:25,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:05:25,969 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_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2021-11-22 15:05:26,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:05:26,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:05:26,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:05:26,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:05:26,238 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:05:26,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2021-11-22 15:05:26,304 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/data/05696a23f/cc539f51718d4bd98ad814607b7cf2e1/FLAG94dcb5e97 [2021-11-22 15:05:26,809 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:05:26,809 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2021-11-22 15:05:26,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/data/05696a23f/cc539f51718d4bd98ad814607b7cf2e1/FLAG94dcb5e97 [2021-11-22 15:05:27,172 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/data/05696a23f/cc539f51718d4bd98ad814607b7cf2e1 [2021-11-22 15:05:27,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:05:27,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:05:27,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:05:27,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:05:27,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:05:27,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78110f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27, skipping insertion in model container [2021-11-22 15:05:27,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:05:27,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:05:27,406 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_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2021-11-22 15:05:27,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:05:27,417 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:05:27,441 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_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2021-11-22 15:05:27,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:05:27,455 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:05:27,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27 WrapperNode [2021-11-22 15:05:27,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:05:27,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:05:27,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:05:27,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:05:27,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,499 INFO L137 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2021-11-22 15:05:27,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:05:27,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:05:27,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:05:27,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:05:27,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:05:27,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:05:27,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:05:27,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:05:27,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (1/1) ... [2021-11-22 15:05:27,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:05:27,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:27,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:05:27,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:05:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:05:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-22 15:05:27,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-22 15:05:27,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-22 15:05:27,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-22 15:05:27,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-22 15:05:27,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-22 15:05:27,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-22 15:05:27,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-22 15:05:27,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:05:27,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:05:27,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:05:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-22 15:05:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-22 15:05:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:05:27,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:05:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:05:27,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:05:27,624 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-22 15:05:27,704 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:05:27,706 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:05:27,995 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:05:28,064 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:05:28,064 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 15:05:28,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:05:28 BoogieIcfgContainer [2021-11-22 15:05:28,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:05:28,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:05:28,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:05:28,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:05:28,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:05:27" (1/3) ... [2021-11-22 15:05:28,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7e5317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:05:28, skipping insertion in model container [2021-11-22 15:05:28,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:27" (2/3) ... [2021-11-22 15:05:28,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7e5317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:05:28, skipping insertion in model container [2021-11-22 15:05:28,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:05:28" (3/3) ... [2021-11-22 15:05:28,080 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2021-11-22 15:05:28,085 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-22 15:05:28,085 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:05:28,086 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:05:28,086 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-22 15:05:28,149 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,149 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,151 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,151 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,151 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,152 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,152 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,152 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,152 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,152 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,152 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,153 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,153 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,153 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,154 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,154 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,156 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,156 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,156 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,156 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,156 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,157 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,157 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,157 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,158 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,158 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,158 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,158 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,158 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,158 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,159 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,159 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,159 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,159 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,163 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,163 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,165 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,166 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,166 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,166 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,166 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,166 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:28,172 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-22 15:05:28,248 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:05:28,254 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 [2021-11-22 15:05:28,255 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-22 15:05:28,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 294 flow [2021-11-22 15:05:28,357 INFO L129 PetriNetUnfolder]: 10/127 cut-off events. [2021-11-22 15:05:28,357 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-22 15:05:28,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 127 events. 10/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2021-11-22 15:05:28,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 131 transitions, 294 flow [2021-11-22 15:05:28,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 114 transitions, 252 flow [2021-11-22 15:05:28,408 INFO L129 PetriNetUnfolder]: 10/113 cut-off events. [2021-11-22 15:05:28,408 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-22 15:05:28,408 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:28,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:28,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1069838279, now seen corresponding path program 1 times [2021-11-22 15:05:28,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:28,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620810572] [2021-11-22 15:05:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:28,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:28,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:28,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620810572] [2021-11-22 15:05:28,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620810572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:28,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:28,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:05:28,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812346753] [2021-11-22 15:05:28,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:28,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:05:28,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:05:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:05:28,735 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 131 [2021-11-22 15:05:28,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:28,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:28,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 131 [2021-11-22 15:05:28,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:28,798 INFO L129 PetriNetUnfolder]: 16/120 cut-off events. [2021-11-22 15:05:28,798 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-22 15:05:28,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 120 events. 16/120 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 18/132 useless extension candidates. Maximal degree in co-relation 98. Up to 25 conditions per place. [2021-11-22 15:05:28,801 INFO L132 encePairwiseOnDemand]: 125/131 looper letters, 12 selfloop transitions, 0 changer transitions 2/108 dead transitions. [2021-11-22 15:05:28,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 264 flow [2021-11-22 15:05:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:05:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-22 15:05:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2021-11-22 15:05:28,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9236641221374046 [2021-11-22 15:05:28,815 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2021-11-22 15:05:28,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2021-11-22 15:05:28,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:28,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2021-11-22 15:05:28,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:28,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:28,829 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:28,831 INFO L186 Difference]: Start difference. First operand has 117 places, 114 transitions, 252 flow. Second operand 2 states and 242 transitions. [2021-11-22 15:05:28,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 264 flow [2021-11-22 15:05:28,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-11-22 15:05:28,840 INFO L242 Difference]: Finished difference. Result has 110 places, 106 transitions, 220 flow [2021-11-22 15:05:28,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2021-11-22 15:05:28,846 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, -7 predicate places. [2021-11-22 15:05:28,846 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 220 flow [2021-11-22 15:05:28,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:28,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:28,847 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:28,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:05:28,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1574494246, now seen corresponding path program 1 times [2021-11-22 15:05:28,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:28,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100166191] [2021-11-22 15:05:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:28,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:29,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100166191] [2021-11-22 15:05:29,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100166191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:29,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:29,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:05:29,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236416399] [2021-11-22 15:05:29,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:29,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:05:29,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:05:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:05:29,125 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2021-11-22 15:05:29,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:29,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:29,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2021-11-22 15:05:29,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:29,320 INFO L129 PetriNetUnfolder]: 23/173 cut-off events. [2021-11-22 15:05:29,320 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-11-22 15:05:29,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 173 events. 23/173 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 225 event pairs, 0 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 231. Up to 36 conditions per place. [2021-11-22 15:05:29,325 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 25 selfloop transitions, 3 changer transitions 5/118 dead transitions. [2021-11-22 15:05:29,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 317 flow [2021-11-22 15:05:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:05:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-22 15:05:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2021-11-22 15:05:29,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8259541984732824 [2021-11-22 15:05:29,335 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2021-11-22 15:05:29,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2021-11-22 15:05:29,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:29,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2021-11-22 15:05:29,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:29,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:29,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:29,346 INFO L186 Difference]: Start difference. First operand has 110 places, 106 transitions, 220 flow. Second operand 5 states and 541 transitions. [2021-11-22 15:05:29,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 317 flow [2021-11-22 15:05:29,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 317 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-22 15:05:29,353 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 247 flow [2021-11-22 15:05:29,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2021-11-22 15:05:29,355 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, -2 predicate places. [2021-11-22 15:05:29,355 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 247 flow [2021-11-22 15:05:29,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:29,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:29,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:29,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:05:29,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash -575216244, now seen corresponding path program 1 times [2021-11-22 15:05:29,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:29,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546956244] [2021-11-22 15:05:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:29,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:29,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546956244] [2021-11-22 15:05:29,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546956244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:29,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:29,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 15:05:29,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118427179] [2021-11-22 15:05:29,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:29,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:05:29,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:29,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:05:29,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:05:29,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:29,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 247 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:29,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:29,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:29,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:30,433 INFO L129 PetriNetUnfolder]: 1599/2767 cut-off events. [2021-11-22 15:05:30,433 INFO L130 PetriNetUnfolder]: For 431/543 co-relation queries the response was YES. [2021-11-22 15:05:30,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5848 conditions, 2767 events. 1599/2767 cut-off events. For 431/543 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15457 event pairs, 316 based on Foata normal form. 0/1969 useless extension candidates. Maximal degree in co-relation 5841. Up to 663 conditions per place. [2021-11-22 15:05:30,481 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 95 selfloop transitions, 11 changer transitions 2/176 dead transitions. [2021-11-22 15:05:30,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 649 flow [2021-11-22 15:05:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:05:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-22 15:05:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 866 transitions. [2021-11-22 15:05:30,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.734520780322307 [2021-11-22 15:05:30,485 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 866 transitions. [2021-11-22 15:05:30,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 866 transitions. [2021-11-22 15:05:30,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:30,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 866 transitions. [2021-11-22 15:05:30,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:30,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:30,496 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:30,496 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 247 flow. Second operand 9 states and 866 transitions. [2021-11-22 15:05:30,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 649 flow [2021-11-22 15:05:30,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 634 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-11-22 15:05:30,509 INFO L242 Difference]: Finished difference. Result has 122 places, 112 transitions, 299 flow [2021-11-22 15:05:30,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=299, PETRI_PLACES=122, PETRI_TRANSITIONS=112} [2021-11-22 15:05:30,512 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 5 predicate places. [2021-11-22 15:05:30,512 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 112 transitions, 299 flow [2021-11-22 15:05:30,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:30,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:30,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:30,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:05:30,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1122247842, now seen corresponding path program 2 times [2021-11-22 15:05:30,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:30,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311387453] [2021-11-22 15:05:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:30,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:30,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311387453] [2021-11-22 15:05:30,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311387453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:30,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:30,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:05:30,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053161342] [2021-11-22 15:05:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:30,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:30,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:30,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:05:30,849 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:30,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 112 transitions, 299 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:30,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:30,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:30,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:31,468 INFO L129 PetriNetUnfolder]: 1474/2634 cut-off events. [2021-11-22 15:05:31,468 INFO L130 PetriNetUnfolder]: For 1455/1530 co-relation queries the response was YES. [2021-11-22 15:05:31,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6486 conditions, 2634 events. 1474/2634 cut-off events. For 1455/1530 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15031 event pairs, 185 based on Foata normal form. 16/2215 useless extension candidates. Maximal degree in co-relation 6477. Up to 1054 conditions per place. [2021-11-22 15:05:31,506 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 81 selfloop transitions, 14 changer transitions 5/168 dead transitions. [2021-11-22 15:05:31,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 168 transitions, 681 flow [2021-11-22 15:05:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:05:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-22 15:05:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 938 transitions. [2021-11-22 15:05:31,511 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.716030534351145 [2021-11-22 15:05:31,511 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 938 transitions. [2021-11-22 15:05:31,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 938 transitions. [2021-11-22 15:05:31,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:31,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 938 transitions. [2021-11-22 15:05:31,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.8) internal successors, (938), 10 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:31,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:31,521 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:31,521 INFO L186 Difference]: Start difference. First operand has 122 places, 112 transitions, 299 flow. Second operand 10 states and 938 transitions. [2021-11-22 15:05:31,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 168 transitions, 681 flow [2021-11-22 15:05:31,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 168 transitions, 668 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-22 15:05:31,539 INFO L242 Difference]: Finished difference. Result has 128 places, 115 transitions, 340 flow [2021-11-22 15:05:31,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=340, PETRI_PLACES=128, PETRI_TRANSITIONS=115} [2021-11-22 15:05:31,541 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 11 predicate places. [2021-11-22 15:05:31,541 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 115 transitions, 340 flow [2021-11-22 15:05:31,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:31,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:31,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:31,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:05:31,543 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2068452710, now seen corresponding path program 1 times [2021-11-22 15:05:31,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:31,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674786383] [2021-11-22 15:05:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:31,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:31,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:31,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674786383] [2021-11-22 15:05:31,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674786383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:31,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:31,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:05:31,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043074755] [2021-11-22 15:05:31,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:31,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:31,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:31,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:05:31,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:31,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 115 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:31,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:31,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:31,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:32,647 INFO L129 PetriNetUnfolder]: 2561/4580 cut-off events. [2021-11-22 15:05:32,647 INFO L130 PetriNetUnfolder]: For 4205/4234 co-relation queries the response was YES. [2021-11-22 15:05:32,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11706 conditions, 4580 events. 2561/4580 cut-off events. For 4205/4234 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 29317 event pairs, 797 based on Foata normal form. 36/3788 useless extension candidates. Maximal degree in co-relation 11695. Up to 1685 conditions per place. [2021-11-22 15:05:32,708 INFO L132 encePairwiseOnDemand]: 119/131 looper letters, 82 selfloop transitions, 16 changer transitions 8/174 dead transitions. [2021-11-22 15:05:32,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 174 transitions, 796 flow [2021-11-22 15:05:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:05:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-22 15:05:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 847 transitions. [2021-11-22 15:05:32,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7184054283290925 [2021-11-22 15:05:32,712 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 847 transitions. [2021-11-22 15:05:32,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 847 transitions. [2021-11-22 15:05:32,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:32,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 847 transitions. [2021-11-22 15:05:32,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.11111111111111) internal successors, (847), 9 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:32,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:32,719 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:32,719 INFO L186 Difference]: Start difference. First operand has 128 places, 115 transitions, 340 flow. Second operand 9 states and 847 transitions. [2021-11-22 15:05:32,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 174 transitions, 796 flow [2021-11-22 15:05:32,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 174 transitions, 764 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-11-22 15:05:32,730 INFO L242 Difference]: Finished difference. Result has 131 places, 122 transitions, 409 flow [2021-11-22 15:05:32,731 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=131, PETRI_TRANSITIONS=122} [2021-11-22 15:05:32,732 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 14 predicate places. [2021-11-22 15:05:32,732 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 122 transitions, 409 flow [2021-11-22 15:05:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:32,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:32,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:32,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:05:32,733 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash 801721472, now seen corresponding path program 2 times [2021-11-22 15:05:32,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:32,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430449082] [2021-11-22 15:05:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:32,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:32,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430449082] [2021-11-22 15:05:32,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430449082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:32,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:32,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:05:32,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489933772] [2021-11-22 15:05:32,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:32,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:32,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:05:32,932 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:32,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 122 transitions, 409 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:32,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:32,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:32,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:33,831 INFO L129 PetriNetUnfolder]: 2517/4412 cut-off events. [2021-11-22 15:05:33,832 INFO L130 PetriNetUnfolder]: For 5995/6042 co-relation queries the response was YES. [2021-11-22 15:05:33,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12578 conditions, 4412 events. 2517/4412 cut-off events. For 5995/6042 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27471 event pairs, 1351 based on Foata normal form. 14/3927 useless extension candidates. Maximal degree in co-relation 12565. Up to 2055 conditions per place. [2021-11-22 15:05:33,884 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 76 selfloop transitions, 14 changer transitions 5/163 dead transitions. [2021-11-22 15:05:33,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 163 transitions, 750 flow [2021-11-22 15:05:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:05:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-22 15:05:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 841 transitions. [2021-11-22 15:05:33,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7133163698049194 [2021-11-22 15:05:33,889 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 841 transitions. [2021-11-22 15:05:33,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 841 transitions. [2021-11-22 15:05:33,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:33,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 841 transitions. [2021-11-22 15:05:33,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.44444444444444) internal successors, (841), 9 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:33,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:33,896 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:33,897 INFO L186 Difference]: Start difference. First operand has 131 places, 122 transitions, 409 flow. Second operand 9 states and 841 transitions. [2021-11-22 15:05:33,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 163 transitions, 750 flow [2021-11-22 15:05:33,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 740 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-22 15:05:33,911 INFO L242 Difference]: Finished difference. Result has 136 places, 122 transitions, 432 flow [2021-11-22 15:05:33,911 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=432, PETRI_PLACES=136, PETRI_TRANSITIONS=122} [2021-11-22 15:05:33,914 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2021-11-22 15:05:33,914 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 122 transitions, 432 flow [2021-11-22 15:05:33,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:33,915 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:33,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:33,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:05:33,916 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash -713874216, now seen corresponding path program 3 times [2021-11-22 15:05:33,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:33,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779864877] [2021-11-22 15:05:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:33,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:34,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:34,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779864877] [2021-11-22 15:05:34,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779864877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:34,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:34,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:05:34,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932225250] [2021-11-22 15:05:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:34,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:34,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:05:34,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:34,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 122 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:34,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:34,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:34,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:35,021 INFO L129 PetriNetUnfolder]: 2462/4241 cut-off events. [2021-11-22 15:05:35,023 INFO L130 PetriNetUnfolder]: For 4868/4917 co-relation queries the response was YES. [2021-11-22 15:05:35,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12343 conditions, 4241 events. 2462/4241 cut-off events. For 4868/4917 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 26097 event pairs, 645 based on Foata normal form. 15/3862 useless extension candidates. Maximal degree in co-relation 12328. Up to 2055 conditions per place. [2021-11-22 15:05:35,072 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 75 selfloop transitions, 11 changer transitions 7/161 dead transitions. [2021-11-22 15:05:35,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 161 transitions, 743 flow [2021-11-22 15:05:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:05:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-22 15:05:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 758 transitions. [2021-11-22 15:05:35,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7232824427480916 [2021-11-22 15:05:35,076 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 758 transitions. [2021-11-22 15:05:35,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 758 transitions. [2021-11-22 15:05:35,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:35,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 758 transitions. [2021-11-22 15:05:35,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.75) internal successors, (758), 8 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:35,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:35,084 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:35,084 INFO L186 Difference]: Start difference. First operand has 136 places, 122 transitions, 432 flow. Second operand 8 states and 758 transitions. [2021-11-22 15:05:35,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 161 transitions, 743 flow [2021-11-22 15:05:35,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 161 transitions, 711 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-11-22 15:05:35,100 INFO L242 Difference]: Finished difference. Result has 135 places, 119 transitions, 394 flow [2021-11-22 15:05:35,101 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=135, PETRI_TRANSITIONS=119} [2021-11-22 15:05:35,102 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 18 predicate places. [2021-11-22 15:05:35,102 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 119 transitions, 394 flow [2021-11-22 15:05:35,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:35,102 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:35,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:35,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:05:35,103 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2039600896, now seen corresponding path program 4 times [2021-11-22 15:05:35,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:35,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776478726] [2021-11-22 15:05:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:35,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:35,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:35,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776478726] [2021-11-22 15:05:35,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776478726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:35,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:35,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:05:35,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026501099] [2021-11-22 15:05:35,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:35,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:35,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:05:35,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:35,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 119 transitions, 394 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:35,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:35,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:35,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:36,133 INFO L129 PetriNetUnfolder]: 2826/4953 cut-off events. [2021-11-22 15:05:36,134 INFO L130 PetriNetUnfolder]: For 5986/5986 co-relation queries the response was YES. [2021-11-22 15:05:36,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13981 conditions, 4953 events. 2826/4953 cut-off events. For 5986/5986 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32204 event pairs, 647 based on Foata normal form. 25/4568 useless extension candidates. Maximal degree in co-relation 13966. Up to 2513 conditions per place. [2021-11-22 15:05:36,192 INFO L132 encePairwiseOnDemand]: 119/131 looper letters, 74 selfloop transitions, 23 changer transitions 1/166 dead transitions. [2021-11-22 15:05:36,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 166 transitions, 843 flow [2021-11-22 15:05:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:05:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-22 15:05:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 831 transitions. [2021-11-22 15:05:36,196 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7048346055979644 [2021-11-22 15:05:36,196 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 831 transitions. [2021-11-22 15:05:36,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 831 transitions. [2021-11-22 15:05:36,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:36,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 831 transitions. [2021-11-22 15:05:36,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.33333333333333) internal successors, (831), 9 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:36,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:36,205 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:36,205 INFO L186 Difference]: Start difference. First operand has 135 places, 119 transitions, 394 flow. Second operand 9 states and 831 transitions. [2021-11-22 15:05:36,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 166 transitions, 843 flow [2021-11-22 15:05:36,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 166 transitions, 793 flow, removed 2 selfloop flow, removed 10 redundant places. [2021-11-22 15:05:36,216 INFO L242 Difference]: Finished difference. Result has 134 places, 129 transitions, 507 flow [2021-11-22 15:05:36,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=507, PETRI_PLACES=134, PETRI_TRANSITIONS=129} [2021-11-22 15:05:36,219 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 17 predicate places. [2021-11-22 15:05:36,219 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 129 transitions, 507 flow [2021-11-22 15:05:36,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:36,220 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:36,220 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:36,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:05:36,221 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash 949990388, now seen corresponding path program 5 times [2021-11-22 15:05:36,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814534720] [2021-11-22 15:05:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:36,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:36,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:36,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814534720] [2021-11-22 15:05:36,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814534720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:36,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:36,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:05:36,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461755500] [2021-11-22 15:05:36,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:36,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:36,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:36,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:05:36,420 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:36,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 129 transitions, 507 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:36,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:36,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:36,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:37,176 INFO L129 PetriNetUnfolder]: 2711/4866 cut-off events. [2021-11-22 15:05:37,176 INFO L130 PetriNetUnfolder]: For 7426/7480 co-relation queries the response was YES. [2021-11-22 15:05:37,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14425 conditions, 4866 events. 2711/4866 cut-off events. For 7426/7480 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31705 event pairs, 664 based on Foata normal form. 35/4673 useless extension candidates. Maximal degree in co-relation 14410. Up to 2002 conditions per place. [2021-11-22 15:05:37,229 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 90 selfloop transitions, 15 changer transitions 3/176 dead transitions. [2021-11-22 15:05:37,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 176 transitions, 890 flow [2021-11-22 15:05:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:05:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-22 15:05:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 758 transitions. [2021-11-22 15:05:37,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7232824427480916 [2021-11-22 15:05:37,233 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 758 transitions. [2021-11-22 15:05:37,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 758 transitions. [2021-11-22 15:05:37,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:37,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 758 transitions. [2021-11-22 15:05:37,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.75) internal successors, (758), 8 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:37,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:37,240 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:37,241 INFO L186 Difference]: Start difference. First operand has 134 places, 129 transitions, 507 flow. Second operand 8 states and 758 transitions. [2021-11-22 15:05:37,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 176 transitions, 890 flow [2021-11-22 15:05:37,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 176 transitions, 871 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-22 15:05:37,254 INFO L242 Difference]: Finished difference. Result has 137 places, 126 transitions, 480 flow [2021-11-22 15:05:37,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=480, PETRI_PLACES=137, PETRI_TRANSITIONS=126} [2021-11-22 15:05:37,255 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 20 predicate places. [2021-11-22 15:05:37,255 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 126 transitions, 480 flow [2021-11-22 15:05:37,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 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) [2021-11-22 15:05:37,256 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:37,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:37,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:05:37,257 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1510429474, now seen corresponding path program 6 times [2021-11-22 15:05:37,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:37,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456810205] [2021-11-22 15:05:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:37,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:37,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:37,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456810205] [2021-11-22 15:05:37,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456810205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:37,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:37,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 15:05:37,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413651904] [2021-11-22 15:05:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:37,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:05:37,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:05:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:05:37,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:37,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 126 transitions, 480 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:37,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:37,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:37,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:38,132 INFO L129 PetriNetUnfolder]: 2207/3726 cut-off events. [2021-11-22 15:05:38,132 INFO L130 PetriNetUnfolder]: For 7483/7524 co-relation queries the response was YES. [2021-11-22 15:05:38,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12374 conditions, 3726 events. 2207/3726 cut-off events. For 7483/7524 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21802 event pairs, 1130 based on Foata normal form. 72/3665 useless extension candidates. Maximal degree in co-relation 12358. Up to 2394 conditions per place. [2021-11-22 15:05:38,227 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 72 selfloop transitions, 12 changer transitions 1/153 dead transitions. [2021-11-22 15:05:38,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 153 transitions, 785 flow [2021-11-22 15:05:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:05:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-22 15:05:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 825 transitions. [2021-11-22 15:05:38,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6997455470737913 [2021-11-22 15:05:38,231 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 825 transitions. [2021-11-22 15:05:38,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 825 transitions. [2021-11-22 15:05:38,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:38,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 825 transitions. [2021-11-22 15:05:38,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.66666666666667) internal successors, (825), 9 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:38,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:38,238 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:38,239 INFO L186 Difference]: Start difference. First operand has 137 places, 126 transitions, 480 flow. Second operand 9 states and 825 transitions. [2021-11-22 15:05:38,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 153 transitions, 785 flow [2021-11-22 15:05:38,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 153 transitions, 737 flow, removed 9 selfloop flow, removed 8 redundant places. [2021-11-22 15:05:38,254 INFO L242 Difference]: Finished difference. Result has 136 places, 125 transitions, 463 flow [2021-11-22 15:05:38,255 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=463, PETRI_PLACES=136, PETRI_TRANSITIONS=125} [2021-11-22 15:05:38,256 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2021-11-22 15:05:38,256 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 125 transitions, 463 flow [2021-11-22 15:05:38,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:38,257 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:38,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:38,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 15:05:38,258 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash 724965322, now seen corresponding path program 1 times [2021-11-22 15:05:38,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:38,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63134118] [2021-11-22 15:05:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:38,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:38,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:38,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63134118] [2021-11-22 15:05:38,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63134118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:38,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207849810] [2021-11-22 15:05:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:38,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:38,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:38,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:38,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:05:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:38,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:05:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:39,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:39,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207849810] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:39,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:05:39,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 20 [2021-11-22 15:05:39,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566842405] [2021-11-22 15:05:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:39,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:39,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-22 15:05:39,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2021-11-22 15:05:39,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 125 transitions, 463 flow. Second operand has 8 states, 8 states have (on average 95.375) internal successors, (763), 8 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:39,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:39,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2021-11-22 15:05:39,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:39,954 INFO L129 PetriNetUnfolder]: 808/1811 cut-off events. [2021-11-22 15:05:39,954 INFO L130 PetriNetUnfolder]: For 3161/3358 co-relation queries the response was YES. [2021-11-22 15:05:39,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5422 conditions, 1811 events. 808/1811 cut-off events. For 3161/3358 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11277 event pairs, 90 based on Foata normal form. 93/1805 useless extension candidates. Maximal degree in co-relation 5408. Up to 547 conditions per place. [2021-11-22 15:05:39,978 INFO L132 encePairwiseOnDemand]: 119/131 looper letters, 89 selfloop transitions, 17 changer transitions 0/186 dead transitions. [2021-11-22 15:05:39,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 186 transitions, 980 flow [2021-11-22 15:05:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:05:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-22 15:05:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 998 transitions. [2021-11-22 15:05:39,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7618320610687023 [2021-11-22 15:05:39,983 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 998 transitions. [2021-11-22 15:05:39,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 998 transitions. [2021-11-22 15:05:39,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:39,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 998 transitions. [2021-11-22 15:05:39,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 99.8) internal successors, (998), 10 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:39,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:39,992 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:39,992 INFO L186 Difference]: Start difference. First operand has 136 places, 125 transitions, 463 flow. Second operand 10 states and 998 transitions. [2021-11-22 15:05:39,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 186 transitions, 980 flow [2021-11-22 15:05:40,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 186 transitions, 944 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-11-22 15:05:40,003 INFO L242 Difference]: Finished difference. Result has 140 places, 132 transitions, 533 flow [2021-11-22 15:05:40,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=533, PETRI_PLACES=140, PETRI_TRANSITIONS=132} [2021-11-22 15:05:40,004 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 23 predicate places. [2021-11-22 15:05:40,005 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 132 transitions, 533 flow [2021-11-22 15:05:40,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.375) internal successors, (763), 8 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:40,005 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:40,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:40,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:40,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-22 15:05:40,222 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 185207622, now seen corresponding path program 2 times [2021-11-22 15:05:40,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:40,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703015802] [2021-11-22 15:05:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:40,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:05:40,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:40,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703015802] [2021-11-22 15:05:40,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703015802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:40,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:40,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:05:40,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303534713] [2021-11-22 15:05:40,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:05:40,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:40,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 132 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:40,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:40,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:40,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:41,132 INFO L129 PetriNetUnfolder]: 2275/3934 cut-off events. [2021-11-22 15:05:41,132 INFO L130 PetriNetUnfolder]: For 8455/8455 co-relation queries the response was YES. [2021-11-22 15:05:41,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13683 conditions, 3934 events. 2275/3934 cut-off events. For 8455/8455 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24141 event pairs, 686 based on Foata normal form. 12/3838 useless extension candidates. Maximal degree in co-relation 13666. Up to 2561 conditions per place. [2021-11-22 15:05:41,188 INFO L132 encePairwiseOnDemand]: 119/131 looper letters, 79 selfloop transitions, 12 changer transitions 8/167 dead transitions. [2021-11-22 15:05:41,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 167 transitions, 927 flow [2021-11-22 15:05:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:05:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-22 15:05:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 828 transitions. [2021-11-22 15:05:41,193 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7022900763358778 [2021-11-22 15:05:41,193 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 828 transitions. [2021-11-22 15:05:41,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 828 transitions. [2021-11-22 15:05:41,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:41,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 828 transitions. [2021-11-22 15:05:41,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:41,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:41,202 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:41,202 INFO L186 Difference]: Start difference. First operand has 140 places, 132 transitions, 533 flow. Second operand 9 states and 828 transitions. [2021-11-22 15:05:41,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 167 transitions, 927 flow [2021-11-22 15:05:41,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 167 transitions, 918 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-22 15:05:41,219 INFO L242 Difference]: Finished difference. Result has 146 places, 134 transitions, 577 flow [2021-11-22 15:05:41,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=577, PETRI_PLACES=146, PETRI_TRANSITIONS=134} [2021-11-22 15:05:41,220 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 29 predicate places. [2021-11-22 15:05:41,221 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 134 transitions, 577 flow [2021-11-22 15:05:41,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:41,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:41,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:41,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:05:41,222 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1199898730, now seen corresponding path program 1 times [2021-11-22 15:05:41,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:41,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503731008] [2021-11-22 15:05:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:41,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:41,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503731008] [2021-11-22 15:05:41,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503731008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496417438] [2021-11-22 15:05:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:41,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:41,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:41,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:05:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:05:41,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:05:42,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:05:42,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496417438] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:42,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:05:42,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 20 [2021-11-22 15:05:42,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435825960] [2021-11-22 15:05:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:42,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:42,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-22 15:05:42,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2021-11-22 15:05:42,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 134 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:42,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:42,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2021-11-22 15:05:42,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:43,156 INFO L129 PetriNetUnfolder]: 1693/3452 cut-off events. [2021-11-22 15:05:43,157 INFO L130 PetriNetUnfolder]: For 8824/9123 co-relation queries the response was YES. [2021-11-22 15:05:43,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11568 conditions, 3452 events. 1693/3452 cut-off events. For 8824/9123 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23426 event pairs, 230 based on Foata normal form. 59/3280 useless extension candidates. Maximal degree in co-relation 11549. Up to 1270 conditions per place. [2021-11-22 15:05:43,223 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 101 selfloop transitions, 18 changer transitions 0/203 dead transitions. [2021-11-22 15:05:43,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 1261 flow [2021-11-22 15:05:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:05:43,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-22 15:05:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 994 transitions. [2021-11-22 15:05:43,230 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7587786259541984 [2021-11-22 15:05:43,230 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 994 transitions. [2021-11-22 15:05:43,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 994 transitions. [2021-11-22 15:05:43,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:43,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 994 transitions. [2021-11-22 15:05:43,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:43,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:43,241 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:43,241 INFO L186 Difference]: Start difference. First operand has 146 places, 134 transitions, 577 flow. Second operand 10 states and 994 transitions. [2021-11-22 15:05:43,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 1261 flow [2021-11-22 15:05:43,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 203 transitions, 1231 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-11-22 15:05:43,256 INFO L242 Difference]: Finished difference. Result has 151 places, 144 transitions, 687 flow [2021-11-22 15:05:43,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=687, PETRI_PLACES=151, PETRI_TRANSITIONS=144} [2021-11-22 15:05:43,258 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 34 predicate places. [2021-11-22 15:05:43,258 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 144 transitions, 687 flow [2021-11-22 15:05:43,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:43,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:43,259 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:43,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:43,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 15:05:43,474 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1190297232, now seen corresponding path program 2 times [2021-11-22 15:05:43,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:43,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204287630] [2021-11-22 15:05:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:43,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:43,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:43,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204287630] [2021-11-22 15:05:43,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204287630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:43,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:43,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:05:43,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330815394] [2021-11-22 15:05:43,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:43,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:05:43,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:05:43,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:05:43,678 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:43,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 144 transitions, 687 flow. Second operand has 8 states, 8 states have (on average 88.5) internal successors, (708), 8 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:43,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:43,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:43,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:44,675 INFO L129 PetriNetUnfolder]: 3169/5254 cut-off events. [2021-11-22 15:05:44,676 INFO L130 PetriNetUnfolder]: For 15827/15859 co-relation queries the response was YES. [2021-11-22 15:05:44,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20638 conditions, 5254 events. 3169/5254 cut-off events. For 15827/15859 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31420 event pairs, 1584 based on Foata normal form. 19/5143 useless extension candidates. Maximal degree in co-relation 20617. Up to 3589 conditions per place. [2021-11-22 15:05:44,767 INFO L132 encePairwiseOnDemand]: 119/131 looper letters, 89 selfloop transitions, 14 changer transitions 12/183 dead transitions. [2021-11-22 15:05:44,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 183 transitions, 1199 flow [2021-11-22 15:05:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:05:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-22 15:05:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 910 transitions. [2021-11-22 15:05:44,770 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6946564885496184 [2021-11-22 15:05:44,770 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 910 transitions. [2021-11-22 15:05:44,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 910 transitions. [2021-11-22 15:05:44,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:44,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 910 transitions. [2021-11-22 15:05:44,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:44,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:44,778 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:44,778 INFO L186 Difference]: Start difference. First operand has 151 places, 144 transitions, 687 flow. Second operand 10 states and 910 transitions. [2021-11-22 15:05:44,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 183 transitions, 1199 flow [2021-11-22 15:05:44,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 183 transitions, 1188 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-11-22 15:05:44,806 INFO L242 Difference]: Finished difference. Result has 158 places, 143 transitions, 712 flow [2021-11-22 15:05:44,806 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=712, PETRI_PLACES=158, PETRI_TRANSITIONS=143} [2021-11-22 15:05:44,807 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 41 predicate places. [2021-11-22 15:05:44,807 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 143 transitions, 712 flow [2021-11-22 15:05:44,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.5) internal successors, (708), 8 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:44,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:44,808 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:44,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:05:44,808 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 800450054, now seen corresponding path program 1 times [2021-11-22 15:05:44,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:44,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157357291] [2021-11-22 15:05:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:44,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:44,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:44,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157357291] [2021-11-22 15:05:44,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157357291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:44,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730398101] [2021-11-22 15:05:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:44,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:44,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:44,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:44,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:05:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:05:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:45,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:45,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730398101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:05:45,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:05:45,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-11-22 15:05:45,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409229506] [2021-11-22 15:05:45,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:05:45,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:05:45,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:45,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:05:45,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:05:45,687 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2021-11-22 15:05:45,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 143 transitions, 712 flow. Second operand has 6 states, 6 states have (on average 104.5) internal successors, (627), 6 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:45,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:45,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2021-11-22 15:05:45,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:46,248 INFO L129 PetriNetUnfolder]: 1497/4347 cut-off events. [2021-11-22 15:05:46,248 INFO L130 PetriNetUnfolder]: For 10726/11217 co-relation queries the response was YES. [2021-11-22 15:05:46,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13801 conditions, 4347 events. 1497/4347 cut-off events. For 10726/11217 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 39044 event pairs, 313 based on Foata normal form. 257/4357 useless extension candidates. Maximal degree in co-relation 13778. Up to 1225 conditions per place. [2021-11-22 15:05:46,328 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 51 selfloop transitions, 29 changer transitions 4/190 dead transitions. [2021-11-22 15:05:46,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 190 transitions, 1193 flow [2021-11-22 15:05:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:05:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-22 15:05:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 657 transitions. [2021-11-22 15:05:46,330 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8358778625954199 [2021-11-22 15:05:46,330 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 657 transitions. [2021-11-22 15:05:46,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 657 transitions. [2021-11-22 15:05:46,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:46,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 657 transitions. [2021-11-22 15:05:46,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:46,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:46,335 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:46,335 INFO L186 Difference]: Start difference. First operand has 158 places, 143 transitions, 712 flow. Second operand 6 states and 657 transitions. [2021-11-22 15:05:46,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 190 transitions, 1193 flow [2021-11-22 15:05:46,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 190 transitions, 1146 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-11-22 15:05:46,353 INFO L242 Difference]: Finished difference. Result has 157 places, 169 transitions, 1085 flow [2021-11-22 15:05:46,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1085, PETRI_PLACES=157, PETRI_TRANSITIONS=169} [2021-11-22 15:05:46,354 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 40 predicate places. [2021-11-22 15:05:46,354 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 169 transitions, 1085 flow [2021-11-22 15:05:46,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.5) internal successors, (627), 6 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:46,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:46,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:46,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:46,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 15:05:46,578 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:46,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1610297928, now seen corresponding path program 2 times [2021-11-22 15:05:46,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:46,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239942070] [2021-11-22 15:05:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:46,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:05:46,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239942070] [2021-11-22 15:05:46,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239942070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855635513] [2021-11-22 15:05:46,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:05:46,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:46,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:46,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:46,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:05:46,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:05:46,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:05:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:05:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:05:47,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:05:47,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855635513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:05:47,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:05:47,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2021-11-22 15:05:47,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687823831] [2021-11-22 15:05:47,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:05:47,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:05:47,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:05:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:05:47,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2021-11-22 15:05:47,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 169 transitions, 1085 flow. Second operand has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:47,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:47,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2021-11-22 15:05:47,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:48,483 INFO L129 PetriNetUnfolder]: 2786/8408 cut-off events. [2021-11-22 15:05:48,484 INFO L130 PetriNetUnfolder]: For 34164/35223 co-relation queries the response was YES. [2021-11-22 15:05:48,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29030 conditions, 8408 events. 2786/8408 cut-off events. For 34164/35223 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 88953 event pairs, 476 based on Foata normal form. 327/8304 useless extension candidates. Maximal degree in co-relation 29005. Up to 2334 conditions per place. [2021-11-22 15:05:48,635 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 62 selfloop transitions, 71 changer transitions 4/243 dead transitions. [2021-11-22 15:05:48,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 243 transitions, 1984 flow [2021-11-22 15:05:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:05:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-22 15:05:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2021-11-22 15:05:48,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429661941112323 [2021-11-22 15:05:48,638 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2021-11-22 15:05:48,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2021-11-22 15:05:48,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:48,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2021-11-22 15:05:48,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:48,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:48,643 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:48,643 INFO L186 Difference]: Start difference. First operand has 157 places, 169 transitions, 1085 flow. Second operand 7 states and 773 transitions. [2021-11-22 15:05:48,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 243 transitions, 1984 flow [2021-11-22 15:05:48,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 243 transitions, 1934 flow, removed 25 selfloop flow, removed 2 redundant places. [2021-11-22 15:05:48,685 INFO L242 Difference]: Finished difference. Result has 163 places, 211 transitions, 1824 flow [2021-11-22 15:05:48,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1824, PETRI_PLACES=163, PETRI_TRANSITIONS=211} [2021-11-22 15:05:48,686 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 46 predicate places. [2021-11-22 15:05:48,686 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 211 transitions, 1824 flow [2021-11-22 15:05:48,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:48,687 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:48,687 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:48,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:48,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 15:05:48,914 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:05:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash -446902032, now seen corresponding path program 3 times [2021-11-22 15:05:48,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:48,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607631579] [2021-11-22 15:05:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:48,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:05:49,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607631579] [2021-11-22 15:05:49,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607631579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:49,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487070568] [2021-11-22 15:05:49,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:05:49,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:49,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:49,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:49,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:05:49,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 15:05:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:05:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:05:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:05:49,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:05:50,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487070568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:05:50,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:05:50,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2021-11-22 15:05:50,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500221031] [2021-11-22 15:05:50,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:05:50,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 15:05:50,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 15:05:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:05:50,273 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:05:50,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 211 transitions, 1824 flow. Second operand has 24 states, 24 states have (on average 88.08333333333333) internal successors, (2114), 24 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:50,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:50,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:05:50,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:01,478 INFO L129 PetriNetUnfolder]: 40001/69802 cut-off events. [2021-11-22 15:06:01,478 INFO L130 PetriNetUnfolder]: For 365907/366247 co-relation queries the response was YES. [2021-11-22 15:06:02,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 298128 conditions, 69802 events. 40001/69802 cut-off events. For 365907/366247 co-relation queries the response was YES. Maximal size of possible extension queue 4132. Compared 685559 event pairs, 7907 based on Foata normal form. 3151/71855 useless extension candidates. Maximal degree in co-relation 298100. Up to 12556 conditions per place. [2021-11-22 15:06:02,517 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 671 selfloop transitions, 142 changer transitions 0/881 dead transitions. [2021-11-22 15:06:02,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 881 transitions, 10719 flow [2021-11-22 15:06:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 15:06:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-22 15:06:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2303 transitions. [2021-11-22 15:06:02,521 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7325063613231552 [2021-11-22 15:06:02,522 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2303 transitions. [2021-11-22 15:06:02,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2303 transitions. [2021-11-22 15:06:02,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:02,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2303 transitions. [2021-11-22 15:06:02,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 95.95833333333333) internal successors, (2303), 24 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:02,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 131.0) internal successors, (3275), 25 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:02,534 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 131.0) internal successors, (3275), 25 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:02,534 INFO L186 Difference]: Start difference. First operand has 163 places, 211 transitions, 1824 flow. Second operand 24 states and 2303 transitions. [2021-11-22 15:06:02,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 881 transitions, 10719 flow [2021-11-22 15:06:03,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 881 transitions, 9995 flow, removed 362 selfloop flow, removed 2 redundant places. [2021-11-22 15:06:03,515 INFO L242 Difference]: Finished difference. Result has 196 places, 302 transitions, 3354 flow [2021-11-22 15:06:03,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3354, PETRI_PLACES=196, PETRI_TRANSITIONS=302} [2021-11-22 15:06:03,517 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 79 predicate places. [2021-11-22 15:06:03,517 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 302 transitions, 3354 flow [2021-11-22 15:06:03,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.08333333333333) internal successors, (2114), 24 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:03,518 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:03,518 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:03,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:06:03,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 15:06:03,746 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:06:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash 694141680, now seen corresponding path program 4 times [2021-11-22 15:06:03,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:03,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478145122] [2021-11-22 15:06:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:03,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:03,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:03,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478145122] [2021-11-22 15:06:03,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478145122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836620299] [2021-11-22 15:06:03,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:06:03,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:03,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:03,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:03,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:06:04,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:06:04,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:06:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:06:04,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:04,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:06:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:05,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836620299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:06:05,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:06:05,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2021-11-22 15:06:05,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552855063] [2021-11-22 15:06:05,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:06:05,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 15:06:05,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:05,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 15:06:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:06:05,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:06:05,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 302 transitions, 3354 flow. Second operand has 24 states, 24 states have (on average 88.0) internal successors, (2112), 24 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:05,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:05,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:06:05,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:30,365 INFO L129 PetriNetUnfolder]: 72262/134504 cut-off events. [2021-11-22 15:06:30,365 INFO L130 PetriNetUnfolder]: For 1080288/1080288 co-relation queries the response was YES. [2021-11-22 15:06:31,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 624897 conditions, 134504 events. 72262/134504 cut-off events. For 1080288/1080288 co-relation queries the response was YES. Maximal size of possible extension queue 9086. Compared 1560551 event pairs, 13386 based on Foata normal form. 3200/136085 useless extension candidates. Maximal degree in co-relation 624856. Up to 28626 conditions per place. [2021-11-22 15:06:32,526 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 771 selfloop transitions, 275 changer transitions 43/1157 dead transitions. [2021-11-22 15:06:32,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1157 transitions, 17050 flow [2021-11-22 15:06:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-22 15:06:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-22 15:06:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2175 transitions. [2021-11-22 15:06:32,535 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7218718884832392 [2021-11-22 15:06:32,535 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2175 transitions. [2021-11-22 15:06:32,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2175 transitions. [2021-11-22 15:06:32,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:32,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2175 transitions. [2021-11-22 15:06:32,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 94.56521739130434) internal successors, (2175), 23 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:32,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 131.0) internal successors, (3144), 24 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:32,551 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 131.0) internal successors, (3144), 24 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:32,552 INFO L186 Difference]: Start difference. First operand has 196 places, 302 transitions, 3354 flow. Second operand 23 states and 2175 transitions. [2021-11-22 15:06:32,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1157 transitions, 17050 flow [2021-11-22 15:06:46,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1157 transitions, 16448 flow, removed 245 selfloop flow, removed 8 redundant places. [2021-11-22 15:06:46,419 INFO L242 Difference]: Finished difference. Result has 219 places, 544 transitions, 7134 flow [2021-11-22 15:06:46,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=3183, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7134, PETRI_PLACES=219, PETRI_TRANSITIONS=544} [2021-11-22 15:06:46,420 INFO L334 CegarLoopForPetriNet]: 117 programPoint places, 102 predicate places. [2021-11-22 15:06:46,420 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 544 transitions, 7134 flow [2021-11-22 15:06:46,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.0) internal successors, (2112), 24 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:46,422 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:46,423 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:46,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-22 15:06:46,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 15:06:46,646 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-22 15:06:46,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:46,646 INFO L85 PathProgramCache]: Analyzing trace with hash -557658312, now seen corresponding path program 5 times [2021-11-22 15:06:46,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:46,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961283064] [2021-11-22 15:06:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:46,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:46,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:46,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961283064] [2021-11-22 15:06:46,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961283064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:46,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235091737] [2021-11-22 15:06:46,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:06:46,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:46,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:46,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:46,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9fcf23b-ad21-4cff-9aaa-9a14fd6f1e57/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:06:46,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-22 15:06:46,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:06:46,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:06:46,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:47,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:06:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:47,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235091737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:06:47,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:06:47,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2021-11-22 15:06:47,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207454734] [2021-11-22 15:06:47,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:06:47,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 15:06:47,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:47,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 15:06:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:06:47,964 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2021-11-22 15:06:47,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 544 transitions, 7134 flow. Second operand has 24 states, 24 states have (on average 87.75) internal successors, (2106), 24 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:47,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:47,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2021-11-22 15:06:47,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand