./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:06:48,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:06:48,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:06:48,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:06:48,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:06:48,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:06:48,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:06:48,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:06:48,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:06:48,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:06:48,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:06:48,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:06:48,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:06:48,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:06:48,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:06:48,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:06:48,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:06:48,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:06:48,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:06:48,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:06:48,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:06:48,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:06:48,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:06:48,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:06:48,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:06:48,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:06:48,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:06:48,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:06:48,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:06:48,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:06:48,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:06:48,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:06:48,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:06:48,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:06:48,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:06:48,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:06:48,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:06:48,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:06:48,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:06:48,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:06:48,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:06:48,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:06:48,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:06:48,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:06:48,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:06:48,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:06:48,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:06:48,195 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:06:48,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:06:48,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:06:48,196 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:06:48,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:06:48,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:06:48,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:06:48,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:06:48,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:06:48,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:06:48,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:06:48,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:06:48,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:06:48,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:06:48,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:06:48,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:06:48,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:06:48,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:06:48,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:06:48,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:06:48,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:06:48,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:06:48,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:06:48,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:06:48,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:06:48,200 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:06:48,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:06:48,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:06:48,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:06:48,201 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_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2021-11-20 06:06:48,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:06:48,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:06:48,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:06:48,492 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:06:48,492 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:06:48,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2021-11-20 06:06:48,573 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/data/55231fad4/efab848031984032a49301b1a669f9a7/FLAGd171027d9 [2021-11-20 06:06:49,018 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:06:49,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2021-11-20 06:06:49,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/data/55231fad4/efab848031984032a49301b1a669f9a7/FLAGd171027d9 [2021-11-20 06:06:49,409 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/data/55231fad4/efab848031984032a49301b1a669f9a7 [2021-11-20 06:06:49,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:06:49,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:06:49,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:06:49,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:06:49,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:06:49,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c5f114f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49, skipping insertion in model container [2021-11-20 06:06:49,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:06:49,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:06:49,681 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_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2021-11-20 06:06:49,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:06:49,699 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:06:49,731 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_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2021-11-20 06:06:49,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:06:49,753 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:06:49,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49 WrapperNode [2021-11-20 06:06:49,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:06:49,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:06:49,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:06:49,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:06:49,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,812 INFO L137 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2021-11-20 06:06:49,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:06:49,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:06:49,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:06:49,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:06:49,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:06:49,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:06:49,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:06:49,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:06:49,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (1/1) ... [2021-11-20 06:06:49,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:06:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:49,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:06:49,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:06:49,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:06:49,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 06:06:49,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 06:06:49,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 06:06:49,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 06:06:49,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:06:49,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:06:49,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:06:49,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:06:49,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:06:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:06:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:06:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:06:49,966 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 06:06:50,063 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:06:50,065 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:06:50,554 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:06:50,571 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:06:50,571 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:06:50,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:06:50 BoogieIcfgContainer [2021-11-20 06:06:50,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:06:50,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:06:50,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:06:50,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:06:50,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:06:49" (1/3) ... [2021-11-20 06:06:50,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3c8e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:06:50, skipping insertion in model container [2021-11-20 06:06:50,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:06:49" (2/3) ... [2021-11-20 06:06:50,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3c8e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:06:50, skipping insertion in model container [2021-11-20 06:06:50,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:06:50" (3/3) ... [2021-11-20 06:06:50,591 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2021-11-20 06:06:50,603 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:06:50,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:06:50,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:06:50,604 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:06:50,680 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,681 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,681 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,682 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,682 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,682 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,682 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,683 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,684 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,684 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,684 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,684 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,684 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,685 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,685 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,685 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,705 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,705 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,705 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,705 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,706 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,706 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,706 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,706 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,706 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,707 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,707 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,707 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,707 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,707 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,710 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,711 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,711 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,711 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,711 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,711 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,712 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,712 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,712 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,712 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,712 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,713 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,713 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,713 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,713 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,713 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,714 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,718 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,718 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,719 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,719 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,719 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,719 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,720 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,720 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,720 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,720 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,721 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,721 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,721 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,721 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,721 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,722 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,722 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,722 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,722 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,723 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,724 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,724 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,726 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,726 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,726 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,726 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,726 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,726 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,727 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,727 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,727 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,727 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,727 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,728 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,728 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,728 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,728 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,728 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,728 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,729 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,729 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,729 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,729 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,729 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,730 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,730 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,730 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,730 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,730 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,730 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,731 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,731 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,732 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,733 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,734 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,735 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,735 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,735 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,738 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,738 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,738 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,738 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,739 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,739 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,739 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,739 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,739 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~stop~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,739 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,740 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,743 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,743 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,743 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,743 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,743 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,744 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~stop~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,744 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,744 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,744 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,744 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,745 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:06:50,747 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 06:06:50,800 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:06:50,807 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 [2021-11-20 06:06:50,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 06:06:50,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 246 transitions, 508 flow [2021-11-20 06:06:50,949 INFO L129 PetriNetUnfolder]: 25/244 cut-off events. [2021-11-20 06:06:50,949 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:06:50,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 244 events. 25/244 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 312 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2021-11-20 06:06:50,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 246 transitions, 508 flow [2021-11-20 06:06:50,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 235 transitions, 482 flow [2021-11-20 06:06:51,061 INFO L129 PetriNetUnfolder]: 25/234 cut-off events. [2021-11-20 06:06:51,062 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:06:51,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:51,069 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:51,070 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1238378754, now seen corresponding path program 1 times [2021-11-20 06:06:51,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:51,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934136996] [2021-11-20 06:06:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:51,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:51,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934136996] [2021-11-20 06:06:51,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934136996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:51,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:51,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:06:51,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167069472] [2021-11-20 06:06:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:51,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:06:51,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:06:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:06:51,595 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 246 [2021-11-20 06:06:51,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:51,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:51,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 246 [2021-11-20 06:06:51,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:51,713 INFO L129 PetriNetUnfolder]: 14/224 cut-off events. [2021-11-20 06:06:51,713 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-11-20 06:06:51,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 224 events. 14/224 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 291 event pairs, 0 based on Foata normal form. 13/216 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2021-11-20 06:06:51,720 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 4 selfloop transitions, 0 changer transitions 7/224 dead transitions. [2021-11-20 06:06:51,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 224 transitions, 468 flow [2021-11-20 06:06:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:06:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:06:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2021-11-20 06:06:51,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9654471544715447 [2021-11-20 06:06:51,748 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2021-11-20 06:06:51,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2021-11-20 06:06:51,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:51,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2021-11-20 06:06:51,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:51,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:51,781 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:51,783 INFO L186 Difference]: Start difference. First operand has 217 places, 235 transitions, 482 flow. Second operand 2 states and 475 transitions. [2021-11-20 06:06:51,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 224 transitions, 468 flow [2021-11-20 06:06:51,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:06:51,812 INFO L242 Difference]: Finished difference. Result has 214 places, 217 transitions, 438 flow [2021-11-20 06:06:51,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=438, PETRI_PLACES=214, PETRI_TRANSITIONS=217} [2021-11-20 06:06:51,824 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -3 predicate places. [2021-11-20 06:06:51,825 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 217 transitions, 438 flow [2021-11-20 06:06:51,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:51,826 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:51,826 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:51,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:06:51,827 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1845329235, now seen corresponding path program 1 times [2021-11-20 06:06:51,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:51,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517617618] [2021-11-20 06:06:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:51,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:52,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:52,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517617618] [2021-11-20 06:06:52,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517617618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:52,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:52,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:06:52,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691815807] [2021-11-20 06:06:52,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:52,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:06:52,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:06:52,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:06:52,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2021-11-20 06:06:52,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 217 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:52,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2021-11-20 06:06:52,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:52,189 INFO L129 PetriNetUnfolder]: 26/304 cut-off events. [2021-11-20 06:06:52,189 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-11-20 06:06:52,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 304 events. 26/304 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 685 event pairs, 1 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 333. Up to 14 conditions per place. [2021-11-20 06:06:52,195 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 10 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2021-11-20 06:06:52,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 221 transitions, 473 flow [2021-11-20 06:06:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:06:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-20 06:06:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2021-11-20 06:06:52,200 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9363143631436315 [2021-11-20 06:06:52,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2021-11-20 06:06:52,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2021-11-20 06:06:52,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:52,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2021-11-20 06:06:52,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,212 INFO L186 Difference]: Start difference. First operand has 214 places, 217 transitions, 438 flow. Second operand 3 states and 691 transitions. [2021-11-20 06:06:52,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 221 transitions, 473 flow [2021-11-20 06:06:52,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 221 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:06:52,231 INFO L242 Difference]: Finished difference. Result has 210 places, 217 transitions, 446 flow [2021-11-20 06:06:52,232 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=210, PETRI_TRANSITIONS=217} [2021-11-20 06:06:52,234 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -7 predicate places. [2021-11-20 06:06:52,234 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 446 flow [2021-11-20 06:06:52,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:52,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:52,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:06:52,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash -523798231, now seen corresponding path program 1 times [2021-11-20 06:06:52,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:52,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354980313] [2021-11-20 06:06:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:52,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:52,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354980313] [2021-11-20 06:06:52,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354980313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:52,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:52,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:06:52,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702546763] [2021-11-20 06:06:52,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:52,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:06:52,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:06:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:06:52,425 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-11-20 06:06:52,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 217 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:52,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-11-20 06:06:52,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:52,576 INFO L129 PetriNetUnfolder]: 53/486 cut-off events. [2021-11-20 06:06:52,577 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-11-20 06:06:52,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 486 events. 53/486 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1855 event pairs, 17 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 579. Up to 57 conditions per place. [2021-11-20 06:06:52,582 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 19 selfloop transitions, 2 changer transitions 0/222 dead transitions. [2021-11-20 06:06:52,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 222 transitions, 501 flow [2021-11-20 06:06:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:06:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-20 06:06:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2021-11-20 06:06:52,588 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2021-11-20 06:06:52,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2021-11-20 06:06:52,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2021-11-20 06:06:52,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:52,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2021-11-20 06:06:52,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,614 INFO L186 Difference]: Start difference. First operand has 210 places, 217 transitions, 446 flow. Second operand 3 states and 677 transitions. [2021-11-20 06:06:52,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 222 transitions, 501 flow [2021-11-20 06:06:52,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 222 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-20 06:06:52,621 INFO L242 Difference]: Finished difference. Result has 212 places, 219 transitions, 462 flow [2021-11-20 06:06:52,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=212, PETRI_TRANSITIONS=219} [2021-11-20 06:06:52,624 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -5 predicate places. [2021-11-20 06:06:52,625 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 219 transitions, 462 flow [2021-11-20 06:06:52,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,626 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:52,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:52,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:06:52,627 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash -837697581, now seen corresponding path program 2 times [2021-11-20 06:06:52,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:52,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765993839] [2021-11-20 06:06:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:52,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:52,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:52,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765993839] [2021-11-20 06:06:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765993839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:52,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:06:52,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811674829] [2021-11-20 06:06:52,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:52,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:06:52,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:06:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:06:52,751 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-11-20 06:06:52,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 219 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:52,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-11-20 06:06:52,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:52,877 INFO L129 PetriNetUnfolder]: 47/435 cut-off events. [2021-11-20 06:06:52,877 INFO L130 PetriNetUnfolder]: For 41/42 co-relation queries the response was YES. [2021-11-20 06:06:52,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 435 events. 47/435 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1417 event pairs, 14 based on Foata normal form. 4/400 useless extension candidates. Maximal degree in co-relation 521. Up to 45 conditions per place. [2021-11-20 06:06:52,882 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2021-11-20 06:06:52,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 224 transitions, 525 flow [2021-11-20 06:06:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:06:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-20 06:06:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2021-11-20 06:06:52,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2021-11-20 06:06:52,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2021-11-20 06:06:52,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2021-11-20 06:06:52,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:52,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2021-11-20 06:06:52,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,896 INFO L186 Difference]: Start difference. First operand has 212 places, 219 transitions, 462 flow. Second operand 3 states and 677 transitions. [2021-11-20 06:06:52,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 224 transitions, 525 flow [2021-11-20 06:06:52,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 224 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-20 06:06:52,904 INFO L242 Difference]: Finished difference. Result has 215 places, 221 transitions, 484 flow [2021-11-20 06:06:52,905 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=215, PETRI_TRANSITIONS=221} [2021-11-20 06:06:52,907 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, -2 predicate places. [2021-11-20 06:06:52,907 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 221 transitions, 484 flow [2021-11-20 06:06:52,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:52,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:52,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:52,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:06:52,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash 345914545, now seen corresponding path program 1 times [2021-11-20 06:06:52,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:52,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154365157] [2021-11-20 06:06:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:52,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:53,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:53,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154365157] [2021-11-20 06:06:53,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154365157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:53,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:53,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:06:53,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048695685] [2021-11-20 06:06:53,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:53,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:06:53,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:06:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:06:53,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2021-11-20 06:06:53,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 221 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:53,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2021-11-20 06:06:53,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:53,179 INFO L129 PetriNetUnfolder]: 29/404 cut-off events. [2021-11-20 06:06:53,179 INFO L130 PetriNetUnfolder]: For 30/38 co-relation queries the response was YES. [2021-11-20 06:06:53,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 404 events. 29/404 cut-off events. For 30/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1292 event pairs, 2 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 467. Up to 26 conditions per place. [2021-11-20 06:06:53,183 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 9 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2021-11-20 06:06:53,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 224 transitions, 514 flow [2021-11-20 06:06:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:06:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-20 06:06:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2021-11-20 06:06:53,187 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2021-11-20 06:06:53,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2021-11-20 06:06:53,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2021-11-20 06:06:53,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:53,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2021-11-20 06:06:53,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,195 INFO L186 Difference]: Start difference. First operand has 215 places, 221 transitions, 484 flow. Second operand 3 states and 690 transitions. [2021-11-20 06:06:53,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 224 transitions, 514 flow [2021-11-20 06:06:53,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 224 transitions, 508 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-11-20 06:06:53,203 INFO L242 Difference]: Finished difference. Result has 217 places, 221 transitions, 486 flow [2021-11-20 06:06:53,204 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=486, PETRI_PLACES=217, PETRI_TRANSITIONS=221} [2021-11-20 06:06:53,207 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 0 predicate places. [2021-11-20 06:06:53,207 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 221 transitions, 486 flow [2021-11-20 06:06:53,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,208 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:53,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:53,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:06:53,209 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:53,211 INFO L85 PathProgramCache]: Analyzing trace with hash -118142017, now seen corresponding path program 1 times [2021-11-20 06:06:53,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:53,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181581117] [2021-11-20 06:06:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:53,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:53,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:53,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181581117] [2021-11-20 06:06:53,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181581117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:53,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:53,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:06:53,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703217434] [2021-11-20 06:06:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:53,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:06:53,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:06:53,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:06:53,294 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-11-20 06:06:53,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 221 transitions, 486 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:53,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-11-20 06:06:53,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:53,481 INFO L129 PetriNetUnfolder]: 41/577 cut-off events. [2021-11-20 06:06:53,481 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2021-11-20 06:06:53,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 577 events. 41/577 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2376 event pairs, 8 based on Foata normal form. 0/538 useless extension candidates. Maximal degree in co-relation 697. Up to 23 conditions per place. [2021-11-20 06:06:53,485 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 26 selfloop transitions, 4 changer transitions 0/231 dead transitions. [2021-11-20 06:06:53,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 231 transitions, 576 flow [2021-11-20 06:06:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:06:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-20 06:06:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2021-11-20 06:06:53,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-11-20 06:06:53,489 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2021-11-20 06:06:53,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2021-11-20 06:06:53,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:53,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2021-11-20 06:06:53,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,497 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,497 INFO L186 Difference]: Start difference. First operand has 217 places, 221 transitions, 486 flow. Second operand 4 states and 902 transitions. [2021-11-20 06:06:53,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 231 transitions, 576 flow [2021-11-20 06:06:53,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 231 transitions, 572 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-20 06:06:53,507 INFO L242 Difference]: Finished difference. Result has 220 places, 223 transitions, 508 flow [2021-11-20 06:06:53,507 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=508, PETRI_PLACES=220, PETRI_TRANSITIONS=223} [2021-11-20 06:06:53,510 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 3 predicate places. [2021-11-20 06:06:53,510 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 223 transitions, 508 flow [2021-11-20 06:06:53,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:53,512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:53,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:06:53,512 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash 577100317, now seen corresponding path program 2 times [2021-11-20 06:06:53,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:53,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117039137] [2021-11-20 06:06:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:53,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:53,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:53,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117039137] [2021-11-20 06:06:53,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117039137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:53,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:53,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:06:53,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158736429] [2021-11-20 06:06:53,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:53,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:06:53,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:06:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:06:53,583 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2021-11-20 06:06:53,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 223 transitions, 508 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:53,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2021-11-20 06:06:53,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:53,728 INFO L129 PetriNetUnfolder]: 38/581 cut-off events. [2021-11-20 06:06:53,728 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2021-11-20 06:06:53,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 581 events. 38/581 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2401 event pairs, 8 based on Foata normal form. 3/557 useless extension candidates. Maximal degree in co-relation 713. Up to 23 conditions per place. [2021-11-20 06:06:53,734 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 28 selfloop transitions, 4 changer transitions 0/233 dead transitions. [2021-11-20 06:06:53,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 233 transitions, 606 flow [2021-11-20 06:06:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:06:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-20 06:06:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2021-11-20 06:06:53,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-11-20 06:06:53,739 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2021-11-20 06:06:53,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2021-11-20 06:06:53,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:53,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2021-11-20 06:06:53,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,746 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,746 INFO L186 Difference]: Start difference. First operand has 220 places, 223 transitions, 508 flow. Second operand 4 states and 902 transitions. [2021-11-20 06:06:53,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 233 transitions, 606 flow [2021-11-20 06:06:53,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 233 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-20 06:06:53,756 INFO L242 Difference]: Finished difference. Result has 224 places, 225 transitions, 536 flow [2021-11-20 06:06:53,757 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=536, PETRI_PLACES=224, PETRI_TRANSITIONS=225} [2021-11-20 06:06:53,758 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 7 predicate places. [2021-11-20 06:06:53,758 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 225 transitions, 536 flow [2021-11-20 06:06:53,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:53,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:53,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:53,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:06:53,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1246874527, now seen corresponding path program 1 times [2021-11-20 06:06:53,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:53,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852212557] [2021-11-20 06:06:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:53,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:53,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:53,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852212557] [2021-11-20 06:06:53,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852212557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:53,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:53,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:53,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539521585] [2021-11-20 06:06:53,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:53,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:53,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:54,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:54,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:54,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 225 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:54,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:54,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:54,361 INFO L129 PetriNetUnfolder]: 72/669 cut-off events. [2021-11-20 06:06:54,361 INFO L130 PetriNetUnfolder]: For 66/79 co-relation queries the response was YES. [2021-11-20 06:06:54,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 669 events. 72/669 cut-off events. For 66/79 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3275 event pairs, 27 based on Foata normal form. 1/643 useless extension candidates. Maximal degree in co-relation 988. Up to 185 conditions per place. [2021-11-20 06:06:54,366 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 67 selfloop transitions, 3 changer transitions 22/271 dead transitions. [2021-11-20 06:06:54,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 271 transitions, 821 flow [2021-11-20 06:06:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:06:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-20 06:06:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2446 transitions. [2021-11-20 06:06:54,375 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7648530331457161 [2021-11-20 06:06:54,375 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2446 transitions. [2021-11-20 06:06:54,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2446 transitions. [2021-11-20 06:06:54,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:54,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2446 transitions. [2021-11-20 06:06:54,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,395 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,395 INFO L186 Difference]: Start difference. First operand has 224 places, 225 transitions, 536 flow. Second operand 13 states and 2446 transitions. [2021-11-20 06:06:54,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 271 transitions, 821 flow [2021-11-20 06:06:54,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 271 transitions, 815 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-11-20 06:06:54,403 INFO L242 Difference]: Finished difference. Result has 246 places, 227 transitions, 573 flow [2021-11-20 06:06:54,403 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=573, PETRI_PLACES=246, PETRI_TRANSITIONS=227} [2021-11-20 06:06:54,404 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-11-20 06:06:54,404 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 227 transitions, 573 flow [2021-11-20 06:06:54,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,405 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:54,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:54,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:06:54,406 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:54,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1587805225, now seen corresponding path program 1 times [2021-11-20 06:06:54,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:54,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890271172] [2021-11-20 06:06:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:54,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:54,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:54,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890271172] [2021-11-20 06:06:54,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890271172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:54,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:54,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:54,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658837954] [2021-11-20 06:06:54,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:54,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:54,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:54,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:54,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:54,544 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:54,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 227 transitions, 573 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:54,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:54,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:54,851 INFO L129 PetriNetUnfolder]: 73/665 cut-off events. [2021-11-20 06:06:54,851 INFO L130 PetriNetUnfolder]: For 225/244 co-relation queries the response was YES. [2021-11-20 06:06:54,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 665 events. 73/665 cut-off events. For 225/244 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3238 event pairs, 31 based on Foata normal form. 1/636 useless extension candidates. Maximal degree in co-relation 1154. Up to 211 conditions per place. [2021-11-20 06:06:54,859 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 8 changer transitions 12/252 dead transitions. [2021-11-20 06:06:54,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 252 transitions, 850 flow [2021-11-20 06:06:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:06:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-20 06:06:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2063 transitions. [2021-11-20 06:06:54,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7623798965262379 [2021-11-20 06:06:54,869 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2063 transitions. [2021-11-20 06:06:54,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2063 transitions. [2021-11-20 06:06:54,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:54,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2063 transitions. [2021-11-20 06:06:54,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.54545454545453) internal successors, (2063), 11 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,889 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,889 INFO L186 Difference]: Start difference. First operand has 246 places, 227 transitions, 573 flow. Second operand 11 states and 2063 transitions. [2021-11-20 06:06:54,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 252 transitions, 850 flow [2021-11-20 06:06:54,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 252 transitions, 809 flow, removed 20 selfloop flow, removed 7 redundant places. [2021-11-20 06:06:54,902 INFO L242 Difference]: Finished difference. Result has 249 places, 234 transitions, 637 flow [2021-11-20 06:06:54,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=637, PETRI_PLACES=249, PETRI_TRANSITIONS=234} [2021-11-20 06:06:54,904 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2021-11-20 06:06:54,904 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 234 transitions, 637 flow [2021-11-20 06:06:54,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:54,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:54,906 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:54,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:06:54,906 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash 358324959, now seen corresponding path program 2 times [2021-11-20 06:06:54,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153990370] [2021-11-20 06:06:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:54,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:55,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:55,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153990370] [2021-11-20 06:06:55,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153990370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:55,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:55,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:55,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126215908] [2021-11-20 06:06:55,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:55,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:55,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:55,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:55,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:55,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:55,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 234 transitions, 637 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:55,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:55,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:55,372 INFO L129 PetriNetUnfolder]: 71/667 cut-off events. [2021-11-20 06:06:55,372 INFO L130 PetriNetUnfolder]: For 302/325 co-relation queries the response was YES. [2021-11-20 06:06:55,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 667 events. 71/667 cut-off events. For 302/325 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3294 event pairs, 27 based on Foata normal form. 1/638 useless extension candidates. Maximal degree in co-relation 1221. Up to 183 conditions per place. [2021-11-20 06:06:55,380 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 6 changer transitions 17/274 dead transitions. [2021-11-20 06:06:55,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 274 transitions, 1039 flow [2021-11-20 06:06:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:06:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-20 06:06:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2440 transitions. [2021-11-20 06:06:55,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7629768605378362 [2021-11-20 06:06:55,414 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2440 transitions. [2021-11-20 06:06:55,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2440 transitions. [2021-11-20 06:06:55,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:55,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2440 transitions. [2021-11-20 06:06:55,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.69230769230768) internal successors, (2440), 13 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,435 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,436 INFO L186 Difference]: Start difference. First operand has 249 places, 234 transitions, 637 flow. Second operand 13 states and 2440 transitions. [2021-11-20 06:06:55,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 274 transitions, 1039 flow [2021-11-20 06:06:55,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 274 transitions, 963 flow, removed 38 selfloop flow, removed 5 redundant places. [2021-11-20 06:06:55,448 INFO L242 Difference]: Finished difference. Result has 261 places, 235 transitions, 660 flow [2021-11-20 06:06:55,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=660, PETRI_PLACES=261, PETRI_TRANSITIONS=235} [2021-11-20 06:06:55,449 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 44 predicate places. [2021-11-20 06:06:55,450 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 235 transitions, 660 flow [2021-11-20 06:06:55,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:55,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:55,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:06:55,452 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash -689111047, now seen corresponding path program 3 times [2021-11-20 06:06:55,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:55,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932834630] [2021-11-20 06:06:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:55,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:55,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:55,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932834630] [2021-11-20 06:06:55,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932834630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:55,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:55,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:55,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138884816] [2021-11-20 06:06:55,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:55,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:55,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:55,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:55,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:55,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 235 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:55,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:55,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:55,869 INFO L129 PetriNetUnfolder]: 70/677 cut-off events. [2021-11-20 06:06:55,869 INFO L130 PetriNetUnfolder]: For 413/432 co-relation queries the response was YES. [2021-11-20 06:06:55,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 677 events. 70/677 cut-off events. For 413/432 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3401 event pairs, 24 based on Foata normal form. 1/653 useless extension candidates. Maximal degree in co-relation 1274. Up to 182 conditions per place. [2021-11-20 06:06:55,877 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 6 changer transitions 18/275 dead transitions. [2021-11-20 06:06:55,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 275 transitions, 1078 flow [2021-11-20 06:06:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:06:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-20 06:06:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2442 transitions. [2021-11-20 06:06:55,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7636022514071295 [2021-11-20 06:06:55,887 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2442 transitions. [2021-11-20 06:06:55,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2442 transitions. [2021-11-20 06:06:55,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:55,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2442 transitions. [2021-11-20 06:06:55,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.84615384615384) internal successors, (2442), 13 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,907 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,907 INFO L186 Difference]: Start difference. First operand has 261 places, 235 transitions, 660 flow. Second operand 13 states and 2442 transitions. [2021-11-20 06:06:55,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 275 transitions, 1078 flow [2021-11-20 06:06:55,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 275 transitions, 1044 flow, removed 15 selfloop flow, removed 8 redundant places. [2021-11-20 06:06:55,920 INFO L242 Difference]: Finished difference. Result has 266 places, 235 transitions, 681 flow [2021-11-20 06:06:55,921 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=681, PETRI_PLACES=266, PETRI_TRANSITIONS=235} [2021-11-20 06:06:55,922 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2021-11-20 06:06:55,922 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 235 transitions, 681 flow [2021-11-20 06:06:55,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:55,923 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:55,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:55,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:06:55,924 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash 347393457, now seen corresponding path program 4 times [2021-11-20 06:06:55,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:55,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180427030] [2021-11-20 06:06:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:55,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:56,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:56,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180427030] [2021-11-20 06:06:56,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180427030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:56,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:56,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:56,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448762519] [2021-11-20 06:06:56,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:56,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:56,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:56,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:56,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:56,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 235 transitions, 681 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:56,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:56,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:56,424 INFO L129 PetriNetUnfolder]: 65/675 cut-off events. [2021-11-20 06:06:56,424 INFO L130 PetriNetUnfolder]: For 590/614 co-relation queries the response was YES. [2021-11-20 06:06:56,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 675 events. 65/675 cut-off events. For 590/614 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3400 event pairs, 28 based on Foata normal form. 2/649 useless extension candidates. Maximal degree in co-relation 1308. Up to 216 conditions per place. [2021-11-20 06:06:56,432 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 10 changer transitions 11/255 dead transitions. [2021-11-20 06:06:56,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 255 transitions, 1023 flow [2021-11-20 06:06:56,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:06:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-20 06:06:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2061 transitions. [2021-11-20 06:06:56,441 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.761640798226164 [2021-11-20 06:06:56,441 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2061 transitions. [2021-11-20 06:06:56,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2061 transitions. [2021-11-20 06:06:56,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:56,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2061 transitions. [2021-11-20 06:06:56,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.36363636363637) internal successors, (2061), 11 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,457 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,457 INFO L186 Difference]: Start difference. First operand has 266 places, 235 transitions, 681 flow. Second operand 11 states and 2061 transitions. [2021-11-20 06:06:56,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 255 transitions, 1023 flow [2021-11-20 06:06:56,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 255 transitions, 938 flow, removed 29 selfloop flow, removed 11 redundant places. [2021-11-20 06:06:56,470 INFO L242 Difference]: Finished difference. Result has 265 places, 241 transitions, 757 flow [2021-11-20 06:06:56,471 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=757, PETRI_PLACES=265, PETRI_TRANSITIONS=241} [2021-11-20 06:06:56,472 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 48 predicate places. [2021-11-20 06:06:56,472 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 241 transitions, 757 flow [2021-11-20 06:06:56,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,473 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:56,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:56,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:06:56,473 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:56,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1378763287, now seen corresponding path program 5 times [2021-11-20 06:06:56,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:56,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942744636] [2021-11-20 06:06:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:56,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:56,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:56,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942744636] [2021-11-20 06:06:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942744636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:56,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:56,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:56,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186587268] [2021-11-20 06:06:56,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:56,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:56,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:56,634 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:56,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 241 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:56,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:56,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:56,853 INFO L129 PetriNetUnfolder]: 61/665 cut-off events. [2021-11-20 06:06:56,853 INFO L130 PetriNetUnfolder]: For 493/521 co-relation queries the response was YES. [2021-11-20 06:06:56,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 665 events. 61/665 cut-off events. For 493/521 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3337 event pairs, 25 based on Foata normal form. 4/643 useless extension candidates. Maximal degree in co-relation 1245. Up to 207 conditions per place. [2021-11-20 06:06:56,860 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 3 changer transitions 20/255 dead transitions. [2021-11-20 06:06:56,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 255 transitions, 1011 flow [2021-11-20 06:06:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:06:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-20 06:06:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2242 transitions. [2021-11-20 06:06:56,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7594850948509485 [2021-11-20 06:06:56,868 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2242 transitions. [2021-11-20 06:06:56,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2242 transitions. [2021-11-20 06:06:56,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:56,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2242 transitions. [2021-11-20 06:06:56,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.83333333333334) internal successors, (2242), 12 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,884 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,885 INFO L186 Difference]: Start difference. First operand has 265 places, 241 transitions, 757 flow. Second operand 12 states and 2242 transitions. [2021-11-20 06:06:56,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 255 transitions, 1011 flow [2021-11-20 06:06:56,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 255 transitions, 962 flow, removed 21 selfloop flow, removed 5 redundant places. [2021-11-20 06:06:56,896 INFO L242 Difference]: Finished difference. Result has 272 places, 234 transitions, 673 flow [2021-11-20 06:06:56,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=673, PETRI_PLACES=272, PETRI_TRANSITIONS=234} [2021-11-20 06:06:56,898 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 55 predicate places. [2021-11-20 06:06:56,898 INFO L470 AbstractCegarLoop]: Abstraction has has 272 places, 234 transitions, 673 flow [2021-11-20 06:06:56,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:56,899 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:56,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:56,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:06:56,900 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash -42250989, now seen corresponding path program 6 times [2021-11-20 06:06:56,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:56,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276327320] [2021-11-20 06:06:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:56,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:57,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:57,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276327320] [2021-11-20 06:06:57,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276327320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:57,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:57,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:57,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232854555] [2021-11-20 06:06:57,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:57,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:57,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:57,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:57,067 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:57,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 234 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:57,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:57,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:57,322 INFO L129 PetriNetUnfolder]: 54/590 cut-off events. [2021-11-20 06:06:57,322 INFO L130 PetriNetUnfolder]: For 304/323 co-relation queries the response was YES. [2021-11-20 06:06:57,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 590 events. 54/590 cut-off events. For 304/323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2675 event pairs, 24 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1027. Up to 176 conditions per place. [2021-11-20 06:06:57,328 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 45 selfloop transitions, 2 changer transitions 21/244 dead transitions. [2021-11-20 06:06:57,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 244 transitions, 859 flow [2021-11-20 06:06:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:06:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-20 06:06:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2238 transitions. [2021-11-20 06:06:57,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.758130081300813 [2021-11-20 06:06:57,336 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2238 transitions. [2021-11-20 06:06:57,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2238 transitions. [2021-11-20 06:06:57,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:57,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2238 transitions. [2021-11-20 06:06:57,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.5) internal successors, (2238), 12 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,347 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,347 INFO L186 Difference]: Start difference. First operand has 272 places, 234 transitions, 673 flow. Second operand 12 states and 2238 transitions. [2021-11-20 06:06:57,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 244 transitions, 859 flow [2021-11-20 06:06:57,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 244 transitions, 789 flow, removed 19 selfloop flow, removed 18 redundant places. [2021-11-20 06:06:57,356 INFO L242 Difference]: Finished difference. Result has 257 places, 223 transitions, 561 flow [2021-11-20 06:06:57,357 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=561, PETRI_PLACES=257, PETRI_TRANSITIONS=223} [2021-11-20 06:06:57,357 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 40 predicate places. [2021-11-20 06:06:57,357 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 223 transitions, 561 flow [2021-11-20 06:06:57,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,358 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:57,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:57,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:06:57,359 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:57,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1569864439, now seen corresponding path program 2 times [2021-11-20 06:06:57,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:57,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220796859] [2021-11-20 06:06:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:57,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:57,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220796859] [2021-11-20 06:06:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220796859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:57,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:57,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:57,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569325610] [2021-11-20 06:06:57,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:57,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:57,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:57,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:57,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:57,464 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:57,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 223 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:57,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:57,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:57,726 INFO L129 PetriNetUnfolder]: 57/598 cut-off events. [2021-11-20 06:06:57,727 INFO L130 PetriNetUnfolder]: For 161/174 co-relation queries the response was YES. [2021-11-20 06:06:57,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 598 events. 57/598 cut-off events. For 161/174 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2704 event pairs, 19 based on Foata normal form. 1/575 useless extension candidates. Maximal degree in co-relation 976. Up to 164 conditions per place. [2021-11-20 06:06:57,732 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 50 selfloop transitions, 8 changer transitions 16/250 dead transitions. [2021-11-20 06:06:57,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 250 transitions, 816 flow [2021-11-20 06:06:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:06:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-20 06:06:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2066 transitions. [2021-11-20 06:06:57,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7634885439763488 [2021-11-20 06:06:57,737 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2066 transitions. [2021-11-20 06:06:57,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2066 transitions. [2021-11-20 06:06:57,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:57,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2066 transitions. [2021-11-20 06:06:57,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,750 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,750 INFO L186 Difference]: Start difference. First operand has 257 places, 223 transitions, 561 flow. Second operand 11 states and 2066 transitions. [2021-11-20 06:06:57,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 250 transitions, 816 flow [2021-11-20 06:06:57,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 250 transitions, 768 flow, removed 17 selfloop flow, removed 12 redundant places. [2021-11-20 06:06:57,759 INFO L242 Difference]: Finished difference. Result has 247 places, 229 transitions, 598 flow [2021-11-20 06:06:57,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=598, PETRI_PLACES=247, PETRI_TRANSITIONS=229} [2021-11-20 06:06:57,760 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2021-11-20 06:06:57,760 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 229 transitions, 598 flow [2021-11-20 06:06:57,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,761 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:57,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:57,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:06:57,762 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1125693919, now seen corresponding path program 3 times [2021-11-20 06:06:57,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:57,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552686727] [2021-11-20 06:06:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:57,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:57,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552686727] [2021-11-20 06:06:57,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552686727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:57,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:57,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:57,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499043626] [2021-11-20 06:06:57,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:57,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:57,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:57,886 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:57,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 229 transitions, 598 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:57,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:57,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:57,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:58,138 INFO L129 PetriNetUnfolder]: 55/596 cut-off events. [2021-11-20 06:06:58,139 INFO L130 PetriNetUnfolder]: For 195/212 co-relation queries the response was YES. [2021-11-20 06:06:58,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 596 events. 55/596 cut-off events. For 195/212 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2719 event pairs, 15 based on Foata normal form. 1/573 useless extension candidates. Maximal degree in co-relation 1018. Up to 136 conditions per place. [2021-11-20 06:06:58,146 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 67 selfloop transitions, 6 changer transitions 23/272 dead transitions. [2021-11-20 06:06:58,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 272 transitions, 978 flow [2021-11-20 06:06:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:06:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-20 06:06:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2443 transitions. [2021-11-20 06:06:58,152 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7639149468417761 [2021-11-20 06:06:58,152 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2443 transitions. [2021-11-20 06:06:58,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2443 transitions. [2021-11-20 06:06:58,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:58,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2443 transitions. [2021-11-20 06:06:58,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.92307692307693) internal successors, (2443), 13 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,168 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,168 INFO L186 Difference]: Start difference. First operand has 247 places, 229 transitions, 598 flow. Second operand 13 states and 2443 transitions. [2021-11-20 06:06:58,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 272 transitions, 978 flow [2021-11-20 06:06:58,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 272 transitions, 928 flow, removed 20 selfloop flow, removed 6 redundant places. [2021-11-20 06:06:58,179 INFO L242 Difference]: Finished difference. Result has 257 places, 229 transitions, 614 flow [2021-11-20 06:06:58,180 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=614, PETRI_PLACES=257, PETRI_TRANSITIONS=229} [2021-11-20 06:06:58,180 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 40 predicate places. [2021-11-20 06:06:58,181 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 229 transitions, 614 flow [2021-11-20 06:06:58,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:58,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:58,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:06:58,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:58,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:58,183 INFO L85 PathProgramCache]: Analyzing trace with hash 472326137, now seen corresponding path program 4 times [2021-11-20 06:06:58,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:58,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554618328] [2021-11-20 06:06:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:58,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:58,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:58,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554618328] [2021-11-20 06:06:58,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554618328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:58,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:58,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:58,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342454001] [2021-11-20 06:06:58,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:58,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:58,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:58,329 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:58,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 229 transitions, 614 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:58,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:58,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:58,632 INFO L129 PetriNetUnfolder]: 52/595 cut-off events. [2021-11-20 06:06:58,632 INFO L130 PetriNetUnfolder]: For 285/302 co-relation queries the response was YES. [2021-11-20 06:06:58,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 595 events. 52/595 cut-off events. For 285/302 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2737 event pairs, 13 based on Foata normal form. 1/574 useless extension candidates. Maximal degree in co-relation 1025. Up to 162 conditions per place. [2021-11-20 06:06:58,639 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 53 selfloop transitions, 10 changer transitions 16/255 dead transitions. [2021-11-20 06:06:58,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 255 transitions, 933 flow [2021-11-20 06:06:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:06:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-20 06:06:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2245 transitions. [2021-11-20 06:06:58,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7605013550135501 [2021-11-20 06:06:58,645 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2245 transitions. [2021-11-20 06:06:58,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2245 transitions. [2021-11-20 06:06:58,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:58,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2245 transitions. [2021-11-20 06:06:58,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.08333333333334) internal successors, (2245), 12 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,659 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,660 INFO L186 Difference]: Start difference. First operand has 257 places, 229 transitions, 614 flow. Second operand 12 states and 2245 transitions. [2021-11-20 06:06:58,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 255 transitions, 933 flow [2021-11-20 06:06:58,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 255 transitions, 868 flow, removed 18 selfloop flow, removed 11 redundant places. [2021-11-20 06:06:58,670 INFO L242 Difference]: Finished difference. Result has 256 places, 235 transitions, 676 flow [2021-11-20 06:06:58,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=676, PETRI_PLACES=256, PETRI_TRANSITIONS=235} [2021-11-20 06:06:58,672 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 39 predicate places. [2021-11-20 06:06:58,672 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 235 transitions, 676 flow [2021-11-20 06:06:58,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,673 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:58,673 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:58,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:06:58,673 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1860783933, now seen corresponding path program 5 times [2021-11-20 06:06:58,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:58,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118062560] [2021-11-20 06:06:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:58,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:58,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:58,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118062560] [2021-11-20 06:06:58,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118062560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:58,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:58,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:58,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713596850] [2021-11-20 06:06:58,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:58,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:58,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:58,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:58,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:58,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:58,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 235 transitions, 676 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:58,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:58,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:58,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:59,085 INFO L129 PetriNetUnfolder]: 47/584 cut-off events. [2021-11-20 06:06:59,086 INFO L130 PetriNetUnfolder]: For 262/291 co-relation queries the response was YES. [2021-11-20 06:06:59,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 584 events. 47/584 cut-off events. For 262/291 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2646 event pairs, 13 based on Foata normal form. 3/565 useless extension candidates. Maximal degree in co-relation 1001. Up to 162 conditions per place. [2021-11-20 06:06:59,092 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 50 selfloop transitions, 3 changer transitions 22/251 dead transitions. [2021-11-20 06:06:59,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 251 transitions, 912 flow [2021-11-20 06:06:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:06:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-20 06:06:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2060 transitions. [2021-11-20 06:06:59,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7612712490761271 [2021-11-20 06:06:59,098 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2060 transitions. [2021-11-20 06:06:59,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2060 transitions. [2021-11-20 06:06:59,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:59,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2060 transitions. [2021-11-20 06:06:59,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.27272727272728) internal successors, (2060), 11 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,112 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,112 INFO L186 Difference]: Start difference. First operand has 256 places, 235 transitions, 676 flow. Second operand 11 states and 2060 transitions. [2021-11-20 06:06:59,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 251 transitions, 912 flow [2021-11-20 06:06:59,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 251 transitions, 892 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-11-20 06:06:59,123 INFO L242 Difference]: Finished difference. Result has 262 places, 228 transitions, 613 flow [2021-11-20 06:06:59,124 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=613, PETRI_PLACES=262, PETRI_TRANSITIONS=228} [2021-11-20 06:06:59,125 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 45 predicate places. [2021-11-20 06:06:59,125 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 228 transitions, 613 flow [2021-11-20 06:06:59,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,126 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:59,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:59,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:06:59,127 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash -892634575, now seen corresponding path program 6 times [2021-11-20 06:06:59,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:59,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604474404] [2021-11-20 06:06:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:59,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:59,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:59,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604474404] [2021-11-20 06:06:59,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604474404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:59,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:59,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:06:59,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784577468] [2021-11-20 06:06:59,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:59,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:06:59,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:59,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:06:59,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:59,252 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2021-11-20 06:06:59,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 228 transitions, 613 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:06:59,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2021-11-20 06:06:59,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:06:59,538 INFO L129 PetriNetUnfolder]: 41/518 cut-off events. [2021-11-20 06:06:59,538 INFO L130 PetriNetUnfolder]: For 184/194 co-relation queries the response was YES. [2021-11-20 06:06:59,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 518 events. 41/518 cut-off events. For 184/194 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2063 event pairs, 12 based on Foata normal form. 1/498 useless extension candidates. Maximal degree in co-relation 828. Up to 129 conditions per place. [2021-11-20 06:06:59,544 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 38 selfloop transitions, 0 changer transitions 37/242 dead transitions. [2021-11-20 06:06:59,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 242 transitions, 809 flow [2021-11-20 06:06:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:06:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-20 06:06:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2239 transitions. [2021-11-20 06:06:59,550 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7584688346883469 [2021-11-20 06:06:59,550 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2239 transitions. [2021-11-20 06:06:59,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2239 transitions. [2021-11-20 06:06:59,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:06:59,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2239 transitions. [2021-11-20 06:06:59,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.58333333333334) internal successors, (2239), 12 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,564 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,564 INFO L186 Difference]: Start difference. First operand has 262 places, 228 transitions, 613 flow. Second operand 12 states and 2239 transitions. [2021-11-20 06:06:59,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 242 transitions, 809 flow [2021-11-20 06:06:59,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 242 transitions, 739 flow, removed 17 selfloop flow, removed 17 redundant places. [2021-11-20 06:06:59,573 INFO L242 Difference]: Finished difference. Result has 248 places, 205 transitions, 442 flow [2021-11-20 06:06:59,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=248, PETRI_TRANSITIONS=205} [2021-11-20 06:06:59,575 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2021-11-20 06:06:59,575 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 205 transitions, 442 flow [2021-11-20 06:06:59,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:06:59,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:06:59,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:59,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:06:59,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:06:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 46791359, now seen corresponding path program 1 times [2021-11-20 06:06:59,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:59,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105758725] [2021-11-20 06:06:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:59,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:00,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:00,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105758725] [2021-11-20 06:07:00,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105758725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:00,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:00,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-20 06:07:00,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409054410] [2021-11-20 06:07:00,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:00,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:07:00,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:00,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:07:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:07:00,209 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-11-20 06:07:00,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 205 transitions, 442 flow. Second operand has 21 states, 21 states have (on average 161.57142857142858) internal successors, (3393), 21 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:00,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:00,214 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-11-20 06:07:00,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:02,047 INFO L129 PetriNetUnfolder]: 197/1694 cut-off events. [2021-11-20 06:07:02,048 INFO L130 PetriNetUnfolder]: For 84/87 co-relation queries the response was YES. [2021-11-20 06:07:02,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1694 events. 197/1694 cut-off events. For 84/87 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12164 event pairs, 38 based on Foata normal form. 4/1573 useless extension candidates. Maximal degree in co-relation 2470. Up to 127 conditions per place. [2021-11-20 06:07:02,062 INFO L132 encePairwiseOnDemand]: 217/246 looper letters, 152 selfloop transitions, 37 changer transitions 13/341 dead transitions. [2021-11-20 06:07:02,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 341 transitions, 1158 flow [2021-11-20 06:07:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:07:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-20 06:07:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4655 transitions. [2021-11-20 06:07:02,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6758130081300813 [2021-11-20 06:07:02,071 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4655 transitions. [2021-11-20 06:07:02,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4655 transitions. [2021-11-20 06:07:02,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:02,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4655 transitions. [2021-11-20 06:07:02,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 166.25) internal successors, (4655), 28 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:02,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:02,122 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:02,122 INFO L186 Difference]: Start difference. First operand has 248 places, 205 transitions, 442 flow. Second operand 28 states and 4655 transitions. [2021-11-20 06:07:02,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 341 transitions, 1158 flow [2021-11-20 06:07:02,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 341 transitions, 1124 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-11-20 06:07:02,131 INFO L242 Difference]: Finished difference. Result has 251 places, 230 transitions, 641 flow [2021-11-20 06:07:02,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=641, PETRI_PLACES=251, PETRI_TRANSITIONS=230} [2021-11-20 06:07:02,132 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 34 predicate places. [2021-11-20 06:07:02,133 INFO L470 AbstractCegarLoop]: Abstraction has has 251 places, 230 transitions, 641 flow [2021-11-20 06:07:02,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 161.57142857142858) internal successors, (3393), 21 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:02,134 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:02,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:02,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:07:02,135 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1289123226, now seen corresponding path program 1 times [2021-11-20 06:07:02,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:02,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589031540] [2021-11-20 06:07:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:02,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:02,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:02,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589031540] [2021-11-20 06:07:02,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589031540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:02,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856280996] [2021-11-20 06:07:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:02,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:02,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:02,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:02,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:07:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:02,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:07:02,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:03,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:04,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856280996] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:04,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:04,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2021-11-20 06:07:04,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695758535] [2021-11-20 06:07:04,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:04,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:07:04,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:07:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:07:04,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-11-20 06:07:04,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 230 transitions, 641 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:04,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:04,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-11-20 06:07:04,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:05,063 INFO L129 PetriNetUnfolder]: 206/1858 cut-off events. [2021-11-20 06:07:05,064 INFO L130 PetriNetUnfolder]: For 650/658 co-relation queries the response was YES. [2021-11-20 06:07:05,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 1858 events. 206/1858 cut-off events. For 650/658 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 13952 event pairs, 81 based on Foata normal form. 6/1719 useless extension candidates. Maximal degree in co-relation 3076. Up to 224 conditions per place. [2021-11-20 06:07:05,088 INFO L132 encePairwiseOnDemand]: 226/246 looper letters, 145 selfloop transitions, 22 changer transitions 7/313 dead transitions. [2021-11-20 06:07:05,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 313 transitions, 1238 flow [2021-11-20 06:07:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:07:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 06:07:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3341 transitions. [2021-11-20 06:07:05,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6790650406504065 [2021-11-20 06:07:05,098 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3341 transitions. [2021-11-20 06:07:05,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3341 transitions. [2021-11-20 06:07:05,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:05,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3341 transitions. [2021-11-20 06:07:05,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 167.05) internal successors, (3341), 20 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:05,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:05,122 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:05,123 INFO L186 Difference]: Start difference. First operand has 251 places, 230 transitions, 641 flow. Second operand 20 states and 3341 transitions. [2021-11-20 06:07:05,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 313 transitions, 1238 flow [2021-11-20 06:07:05,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 313 transitions, 1206 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-11-20 06:07:05,136 INFO L242 Difference]: Finished difference. Result has 266 places, 236 transitions, 725 flow [2021-11-20 06:07:05,137 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=725, PETRI_PLACES=266, PETRI_TRANSITIONS=236} [2021-11-20 06:07:05,138 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2021-11-20 06:07:05,138 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 236 transitions, 725 flow [2021-11-20 06:07:05,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:05,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:05,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:05,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:05,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:05,354 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:05,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1113965941, now seen corresponding path program 1 times [2021-11-20 06:07:05,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:05,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288943109] [2021-11-20 06:07:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:05,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:05,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288943109] [2021-11-20 06:07:05,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288943109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696721886] [2021-11-20 06:07:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:05,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:05,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:05,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:05,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:07:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:07:05,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:06,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:07,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696721886] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:07,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:07,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2021-11-20 06:07:07,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732755957] [2021-11-20 06:07:07,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:07,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:07:07,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:07,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:07:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:07:07,177 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2021-11-20 06:07:07,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 236 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:07,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:07,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2021-11-20 06:07:07,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:08,269 INFO L129 PetriNetUnfolder]: 269/2431 cut-off events. [2021-11-20 06:07:08,270 INFO L130 PetriNetUnfolder]: For 1252/1270 co-relation queries the response was YES. [2021-11-20 06:07:08,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4217 conditions, 2431 events. 269/2431 cut-off events. For 1252/1270 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 20072 event pairs, 111 based on Foata normal form. 6/2242 useless extension candidates. Maximal degree in co-relation 4182. Up to 410 conditions per place. [2021-11-20 06:07:08,300 INFO L132 encePairwiseOnDemand]: 229/246 looper letters, 152 selfloop transitions, 23 changer transitions 11/325 dead transitions. [2021-11-20 06:07:08,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 325 transitions, 1399 flow [2021-11-20 06:07:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:07:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 06:07:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2021-11-20 06:07:08,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6836043360433605 [2021-11-20 06:07:08,307 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2021-11-20 06:07:08,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2021-11-20 06:07:08,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:08,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2021-11-20 06:07:08,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.16666666666666) internal successors, (3027), 18 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:08,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:08,390 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:08,390 INFO L186 Difference]: Start difference. First operand has 266 places, 236 transitions, 725 flow. Second operand 18 states and 3027 transitions. [2021-11-20 06:07:08,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 325 transitions, 1399 flow [2021-11-20 06:07:08,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 325 transitions, 1338 flow, removed 20 selfloop flow, removed 11 redundant places. [2021-11-20 06:07:08,409 INFO L242 Difference]: Finished difference. Result has 276 places, 240 transitions, 791 flow [2021-11-20 06:07:08,409 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=791, PETRI_PLACES=276, PETRI_TRANSITIONS=240} [2021-11-20 06:07:08,410 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 59 predicate places. [2021-11-20 06:07:08,410 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 240 transitions, 791 flow [2021-11-20 06:07:08,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:08,412 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:08,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:08,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:08,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:08,640 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash -447164831, now seen corresponding path program 2 times [2021-11-20 06:07:08,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:08,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869180877] [2021-11-20 06:07:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:08,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:08,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:08,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869180877] [2021-11-20 06:07:08,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869180877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:08,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364519759] [2021-11-20 06:07:08,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:07:08,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:08,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:08,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:08,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:07:08,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 06:07:08,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:07:08,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:07:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:07:09,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:09,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364519759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:09,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:07:09,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2021-11-20 06:07:09,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206474920] [2021-11-20 06:07:09,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:09,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:07:09,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:09,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:07:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:07:09,781 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 246 [2021-11-20 06:07:09,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 240 transitions, 791 flow. Second operand has 12 states, 12 states have (on average 180.66666666666666) internal successors, (2168), 12 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:09,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:09,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 246 [2021-11-20 06:07:09,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:10,720 INFO L129 PetriNetUnfolder]: 248/2642 cut-off events. [2021-11-20 06:07:10,720 INFO L130 PetriNetUnfolder]: For 1558/1604 co-relation queries the response was YES. [2021-11-20 06:07:10,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4677 conditions, 2642 events. 248/2642 cut-off events. For 1558/1604 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 22520 event pairs, 101 based on Foata normal form. 22/2483 useless extension candidates. Maximal degree in co-relation 4637. Up to 495 conditions per place. [2021-11-20 06:07:10,747 INFO L132 encePairwiseOnDemand]: 233/246 looper letters, 83 selfloop transitions, 4 changer transitions 18/276 dead transitions. [2021-11-20 06:07:10,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 276 transitions, 1135 flow [2021-11-20 06:07:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:07:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 06:07:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2558 transitions. [2021-11-20 06:07:10,752 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2021-11-20 06:07:10,752 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2558 transitions. [2021-11-20 06:07:10,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2558 transitions. [2021-11-20 06:07:10,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:10,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2558 transitions. [2021-11-20 06:07:10,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 182.71428571428572) internal successors, (2558), 14 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:10,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:10,763 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:10,763 INFO L186 Difference]: Start difference. First operand has 276 places, 240 transitions, 791 flow. Second operand 14 states and 2558 transitions. [2021-11-20 06:07:10,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 276 transitions, 1135 flow [2021-11-20 06:07:10,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 276 transitions, 1082 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-11-20 06:07:10,781 INFO L242 Difference]: Finished difference. Result has 288 places, 240 transitions, 796 flow [2021-11-20 06:07:10,781 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=796, PETRI_PLACES=288, PETRI_TRANSITIONS=240} [2021-11-20 06:07:10,782 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 71 predicate places. [2021-11-20 06:07:10,782 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 240 transitions, 796 flow [2021-11-20 06:07:10,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.66666666666666) internal successors, (2168), 12 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:10,782 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:10,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:10,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:11,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:11,003 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1283940024, now seen corresponding path program 1 times [2021-11-20 06:07:11,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:11,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439822402] [2021-11-20 06:07:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:11,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:11,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:11,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439822402] [2021-11-20 06:07:11,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439822402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:11,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:11,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:07:11,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145517485] [2021-11-20 06:07:11,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:11,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:07:11,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:07:11,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:07:11,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-11-20 06:07:11,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 240 transitions, 796 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:11,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:11,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-11-20 06:07:11,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:11,524 INFO L129 PetriNetUnfolder]: 215/1678 cut-off events. [2021-11-20 06:07:11,524 INFO L130 PetriNetUnfolder]: For 2045/2078 co-relation queries the response was YES. [2021-11-20 06:07:11,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3108 conditions, 1678 events. 215/1678 cut-off events. For 2045/2078 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 11938 event pairs, 136 based on Foata normal form. 0/1531 useless extension candidates. Maximal degree in co-relation 3061. Up to 321 conditions per place. [2021-11-20 06:07:11,550 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 73 selfloop transitions, 12 changer transitions 4/257 dead transitions. [2021-11-20 06:07:11,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 257 transitions, 1045 flow [2021-11-20 06:07:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:07:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-20 06:07:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1985 transitions. [2021-11-20 06:07:11,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2021-11-20 06:07:11,563 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1985 transitions. [2021-11-20 06:07:11,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1985 transitions. [2021-11-20 06:07:11,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:11,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1985 transitions. [2021-11-20 06:07:11,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.5) internal successors, (1985), 10 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:11,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:11,581 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:11,581 INFO L186 Difference]: Start difference. First operand has 288 places, 240 transitions, 796 flow. Second operand 10 states and 1985 transitions. [2021-11-20 06:07:11,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 257 transitions, 1045 flow [2021-11-20 06:07:11,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 257 transitions, 1011 flow, removed 13 selfloop flow, removed 13 redundant places. [2021-11-20 06:07:11,605 INFO L242 Difference]: Finished difference. Result has 274 places, 236 transitions, 774 flow [2021-11-20 06:07:11,605 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=774, PETRI_PLACES=274, PETRI_TRANSITIONS=236} [2021-11-20 06:07:11,606 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 57 predicate places. [2021-11-20 06:07:11,606 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 236 transitions, 774 flow [2021-11-20 06:07:11,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:11,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:11,607 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:11,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:07:11,607 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1777435984, now seen corresponding path program 1 times [2021-11-20 06:07:11,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:11,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686326784] [2021-11-20 06:07:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:11,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:11,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:11,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686326784] [2021-11-20 06:07:11,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686326784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:11,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:11,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:07:11,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412742219] [2021-11-20 06:07:11,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:11,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:07:11,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:07:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:07:11,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-11-20 06:07:11,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 236 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:11,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:11,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-11-20 06:07:11,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:12,180 INFO L129 PetriNetUnfolder]: 272/1644 cut-off events. [2021-11-20 06:07:12,184 INFO L130 PetriNetUnfolder]: For 1527/1551 co-relation queries the response was YES. [2021-11-20 06:07:12,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 1644 events. 272/1644 cut-off events. For 1527/1551 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 10939 event pairs, 139 based on Foata normal form. 8/1515 useless extension candidates. Maximal degree in co-relation 2924. Up to 430 conditions per place. [2021-11-20 06:07:12,211 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 45 selfloop transitions, 8 changer transitions 34/251 dead transitions. [2021-11-20 06:07:12,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 251 transitions, 993 flow [2021-11-20 06:07:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:07:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-20 06:07:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1983 transitions. [2021-11-20 06:07:12,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8060975609756098 [2021-11-20 06:07:12,221 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1983 transitions. [2021-11-20 06:07:12,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1983 transitions. [2021-11-20 06:07:12,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:12,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1983 transitions. [2021-11-20 06:07:12,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:12,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:12,231 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:12,232 INFO L186 Difference]: Start difference. First operand has 274 places, 236 transitions, 774 flow. Second operand 10 states and 1983 transitions. [2021-11-20 06:07:12,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 251 transitions, 993 flow [2021-11-20 06:07:12,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 251 transitions, 968 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-11-20 06:07:12,247 INFO L242 Difference]: Finished difference. Result has 276 places, 215 transitions, 628 flow [2021-11-20 06:07:12,248 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=628, PETRI_PLACES=276, PETRI_TRANSITIONS=215} [2021-11-20 06:07:12,248 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 59 predicate places. [2021-11-20 06:07:12,249 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 215 transitions, 628 flow [2021-11-20 06:07:12,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:12,249 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:12,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:12,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 06:07:12,250 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:12,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1921923888, now seen corresponding path program 1 times [2021-11-20 06:07:12,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:12,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20792284] [2021-11-20 06:07:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:12,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:12,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20792284] [2021-11-20 06:07:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20792284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185800403] [2021-11-20 06:07:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:12,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:12,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:12,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:12,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:07:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:12,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:07:12,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:13,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:14,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185800403] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:14,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2021-11-20 06:07:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545154957] [2021-11-20 06:07:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:07:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:07:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:07:14,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2021-11-20 06:07:14,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 215 transitions, 628 flow. Second operand has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:14,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:14,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2021-11-20 06:07:14,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:14,690 INFO L129 PetriNetUnfolder]: 251/1472 cut-off events. [2021-11-20 06:07:14,690 INFO L130 PetriNetUnfolder]: For 1090/1101 co-relation queries the response was YES. [2021-11-20 06:07:14,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1472 events. 251/1472 cut-off events. For 1090/1101 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9675 event pairs, 51 based on Foata normal form. 9/1375 useless extension candidates. Maximal degree in co-relation 2553. Up to 147 conditions per place. [2021-11-20 06:07:14,714 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 70 selfloop transitions, 15 changer transitions 0/247 dead transitions. [2021-11-20 06:07:14,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 247 transitions, 949 flow [2021-11-20 06:07:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:07:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 06:07:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2725 transitions. [2021-11-20 06:07:14,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7912311265969802 [2021-11-20 06:07:14,723 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2725 transitions. [2021-11-20 06:07:14,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2725 transitions. [2021-11-20 06:07:14,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:14,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2725 transitions. [2021-11-20 06:07:14,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.64285714285714) internal successors, (2725), 14 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:14,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:14,736 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:14,737 INFO L186 Difference]: Start difference. First operand has 276 places, 215 transitions, 628 flow. Second operand 14 states and 2725 transitions. [2021-11-20 06:07:14,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 247 transitions, 949 flow [2021-11-20 06:07:14,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 247 transitions, 839 flow, removed 30 selfloop flow, removed 25 redundant places. [2021-11-20 06:07:14,751 INFO L242 Difference]: Finished difference. Result has 246 places, 219 transitions, 599 flow [2021-11-20 06:07:14,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=599, PETRI_PLACES=246, PETRI_TRANSITIONS=219} [2021-11-20 06:07:14,754 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-11-20 06:07:14,754 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 219 transitions, 599 flow [2021-11-20 06:07:14,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:14,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:14,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:14,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 06:07:14,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:07:14,972 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:14,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:14,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1696586148, now seen corresponding path program 1 times [2021-11-20 06:07:14,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:14,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571035241] [2021-11-20 06:07:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:14,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:07:15,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571035241] [2021-11-20 06:07:15,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571035241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:15,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:15,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:07:15,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398738818] [2021-11-20 06:07:15,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:15,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:07:15,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:15,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:07:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:07:15,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-11-20 06:07:15,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 219 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:15,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-11-20 06:07:15,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:15,422 INFO L129 PetriNetUnfolder]: 118/871 cut-off events. [2021-11-20 06:07:15,422 INFO L130 PetriNetUnfolder]: For 412/448 co-relation queries the response was YES. [2021-11-20 06:07:15,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 871 events. 118/871 cut-off events. For 412/448 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4454 event pairs, 66 based on Foata normal form. 22/823 useless extension candidates. Maximal degree in co-relation 1476. Up to 174 conditions per place. [2021-11-20 06:07:15,433 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 59 selfloop transitions, 8 changer transitions 3/236 dead transitions. [2021-11-20 06:07:15,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 236 transitions, 810 flow [2021-11-20 06:07:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:07:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-20 06:07:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1591 transitions. [2021-11-20 06:07:15,445 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8084349593495935 [2021-11-20 06:07:15,445 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1591 transitions. [2021-11-20 06:07:15,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1591 transitions. [2021-11-20 06:07:15,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:15,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1591 transitions. [2021-11-20 06:07:15,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.875) internal successors, (1591), 8 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,486 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,486 INFO L186 Difference]: Start difference. First operand has 246 places, 219 transitions, 599 flow. Second operand 8 states and 1591 transitions. [2021-11-20 06:07:15,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 236 transitions, 810 flow [2021-11-20 06:07:15,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 236 transitions, 788 flow, removed 1 selfloop flow, removed 9 redundant places. [2021-11-20 06:07:15,497 INFO L242 Difference]: Finished difference. Result has 247 places, 221 transitions, 613 flow [2021-11-20 06:07:15,497 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=247, PETRI_TRANSITIONS=221} [2021-11-20 06:07:15,498 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2021-11-20 06:07:15,498 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 221 transitions, 613 flow [2021-11-20 06:07:15,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,499 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:15,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:15,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 06:07:15,500 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:15,501 INFO L85 PathProgramCache]: Analyzing trace with hash 944121436, now seen corresponding path program 1 times [2021-11-20 06:07:15,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:15,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430518315] [2021-11-20 06:07:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:15,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:07:15,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:15,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430518315] [2021-11-20 06:07:15,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430518315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:15,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:15,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:07:15,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563373304] [2021-11-20 06:07:15,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:15,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:07:15,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:07:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:07:15,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2021-11-20 06:07:15,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 221 transitions, 613 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:15,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2021-11-20 06:07:15,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:15,812 INFO L129 PetriNetUnfolder]: 137/851 cut-off events. [2021-11-20 06:07:15,813 INFO L130 PetriNetUnfolder]: For 413/417 co-relation queries the response was YES. [2021-11-20 06:07:15,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 851 events. 137/851 cut-off events. For 413/417 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4085 event pairs, 66 based on Foata normal form. 9/806 useless extension candidates. Maximal degree in co-relation 1483. Up to 225 conditions per place. [2021-11-20 06:07:15,821 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 46 selfloop transitions, 6 changer transitions 13/229 dead transitions. [2021-11-20 06:07:15,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 229 transitions, 763 flow [2021-11-20 06:07:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:07:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-20 06:07:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1588 transitions. [2021-11-20 06:07:15,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2021-11-20 06:07:15,825 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1588 transitions. [2021-11-20 06:07:15,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1588 transitions. [2021-11-20 06:07:15,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:15,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1588 transitions. [2021-11-20 06:07:15,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.5) internal successors, (1588), 8 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,833 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,833 INFO L186 Difference]: Start difference. First operand has 247 places, 221 transitions, 613 flow. Second operand 8 states and 1588 transitions. [2021-11-20 06:07:15,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 229 transitions, 763 flow [2021-11-20 06:07:15,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 229 transitions, 748 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-20 06:07:15,841 INFO L242 Difference]: Finished difference. Result has 248 places, 214 transitions, 563 flow [2021-11-20 06:07:15,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=563, PETRI_PLACES=248, PETRI_TRANSITIONS=214} [2021-11-20 06:07:15,842 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2021-11-20 06:07:15,842 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 214 transitions, 563 flow [2021-11-20 06:07:15,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:15,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:15,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:15,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 06:07:15,844 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash 506138029, now seen corresponding path program 1 times [2021-11-20 06:07:15,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:15,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340713654] [2021-11-20 06:07:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:15,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:07:16,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:16,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340713654] [2021-11-20 06:07:16,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340713654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:16,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948614712] [2021-11-20 06:07:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:16,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:16,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:16,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:16,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:07:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:16,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:07:16,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:07:16,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:07:17,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948614712] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:17,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:17,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2021-11-20 06:07:17,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621748506] [2021-11-20 06:07:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:17,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:07:17,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:07:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:07:17,450 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2021-11-20 06:07:17,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 214 transitions, 563 flow. Second operand has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:17,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:17,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2021-11-20 06:07:17,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:17,843 INFO L129 PetriNetUnfolder]: 103/789 cut-off events. [2021-11-20 06:07:17,844 INFO L130 PetriNetUnfolder]: For 352/373 co-relation queries the response was YES. [2021-11-20 06:07:17,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 789 events. 103/789 cut-off events. For 352/373 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3894 event pairs, 44 based on Foata normal form. 23/760 useless extension candidates. Maximal degree in co-relation 1318. Up to 115 conditions per place. [2021-11-20 06:07:17,852 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 49 selfloop transitions, 13 changer transitions 0/224 dead transitions. [2021-11-20 06:07:17,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 224 transitions, 737 flow [2021-11-20 06:07:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:07:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-20 06:07:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2513 transitions. [2021-11-20 06:07:17,858 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7858036272670419 [2021-11-20 06:07:17,859 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2513 transitions. [2021-11-20 06:07:17,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2513 transitions. [2021-11-20 06:07:17,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:17,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2513 transitions. [2021-11-20 06:07:17,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.30769230769232) internal successors, (2513), 13 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:17,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:17,871 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:17,872 INFO L186 Difference]: Start difference. First operand has 248 places, 214 transitions, 563 flow. Second operand 13 states and 2513 transitions. [2021-11-20 06:07:17,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 224 transitions, 737 flow [2021-11-20 06:07:17,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 224 transitions, 704 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-11-20 06:07:17,880 INFO L242 Difference]: Finished difference. Result has 246 places, 215 transitions, 576 flow [2021-11-20 06:07:17,880 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=576, PETRI_PLACES=246, PETRI_TRANSITIONS=215} [2021-11-20 06:07:17,884 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2021-11-20 06:07:17,885 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 215 transitions, 576 flow [2021-11-20 06:07:17,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:17,885 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:17,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:17,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:18,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:07:18,108 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1167166316, now seen corresponding path program 1 times [2021-11-20 06:07:18,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524793088] [2021-11-20 06:07:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:18,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:18,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524793088] [2021-11-20 06:07:18,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524793088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237641266] [2021-11-20 06:07:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:18,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:18,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:18,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:18,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:07:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:07:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:20,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:21,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237641266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:21,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:07:21,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2021-11-20 06:07:21,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955344625] [2021-11-20 06:07:21,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:21,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 06:07:21,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 06:07:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 06:07:21,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 246 [2021-11-20 06:07:22,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 215 transitions, 576 flow. Second operand has 43 states, 43 states have (on average 160.2093023255814) internal successors, (6889), 43 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:22,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:22,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 246 [2021-11-20 06:07:22,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:23,998 INFO L129 PetriNetUnfolder]: 197/1898 cut-off events. [2021-11-20 06:07:23,998 INFO L130 PetriNetUnfolder]: For 629/722 co-relation queries the response was YES. [2021-11-20 06:07:24,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 1898 events. 197/1898 cut-off events. For 629/722 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 14024 event pairs, 77 based on Foata normal form. 91/1914 useless extension candidates. Maximal degree in co-relation 3229. Up to 186 conditions per place. [2021-11-20 06:07:24,010 INFO L132 encePairwiseOnDemand]: 224/246 looper letters, 158 selfloop transitions, 35 changer transitions 15/345 dead transitions. [2021-11-20 06:07:24,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 345 transitions, 1414 flow [2021-11-20 06:07:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:07:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-20 06:07:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5055 transitions. [2021-11-20 06:07:24,019 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6628638867033831 [2021-11-20 06:07:24,019 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5055 transitions. [2021-11-20 06:07:24,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5055 transitions. [2021-11-20 06:07:24,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:24,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5055 transitions. [2021-11-20 06:07:24,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 163.06451612903226) internal successors, (5055), 31 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:24,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 246.0) internal successors, (7872), 32 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:24,039 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 246.0) internal successors, (7872), 32 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:24,040 INFO L186 Difference]: Start difference. First operand has 246 places, 215 transitions, 576 flow. Second operand 31 states and 5055 transitions. [2021-11-20 06:07:24,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 345 transitions, 1414 flow [2021-11-20 06:07:24,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 345 transitions, 1379 flow, removed 0 selfloop flow, removed 11 redundant places. [2021-11-20 06:07:24,050 INFO L242 Difference]: Finished difference. Result has 276 places, 236 transitions, 763 flow [2021-11-20 06:07:24,050 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=763, PETRI_PLACES=276, PETRI_TRANSITIONS=236} [2021-11-20 06:07:24,051 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 59 predicate places. [2021-11-20 06:07:24,051 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 236 transitions, 763 flow [2021-11-20 06:07:24,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 160.2093023255814) internal successors, (6889), 43 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:24,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:24,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:24,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:24,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:24,267 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1120686906, now seen corresponding path program 1 times [2021-11-20 06:07:24,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915862191] [2021-11-20 06:07:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:24,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:24,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915862191] [2021-11-20 06:07:24,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915862191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:24,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629750555] [2021-11-20 06:07:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:24,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:24,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:24,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:24,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:07:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:24,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 06:07:24,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:24,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:07:25,120 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:07:25,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 06:07:25,704 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 06:07:25,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-11-20 06:07:25,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:07:25,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:07:26,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 06:07:26,320 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:07:26,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-20 06:07:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:07:26,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:27,946 WARN L838 $PredicateComparison]: unable to prove that (forall ((~get1~0.base Int) (|ULTIMATE.start_main_#t~pre23#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre23#1|)))) (let ((.cse1 (select .cse3 ~get1~0.base)) (.cse0 (select .cse3 c_~get2~0.base))) (or (not (= (select .cse0 c_~get2~0.offset) (select .cse1 c_~get1~0.offset))) (let ((.cse2 (* c_thread1Thread1of1ForFork0_~i~0 4))) (= (select .cse1 (+ c_~get1~0.offset .cse2)) (select .cse0 (+ c_~get2~0.offset .cse2)))))))) is different from false [2021-11-20 06:07:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:28,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629750555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:28,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:07:28,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 10] total 45 [2021-11-20 06:07:28,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605913374] [2021-11-20 06:07:28,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:28,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 06:07:28,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 06:07:28,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1705, Unknown=1, NotChecked=84, Total=1980 [2021-11-20 06:07:28,213 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 246 [2021-11-20 06:07:28,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 236 transitions, 763 flow. Second operand has 45 states, 45 states have (on average 154.66666666666666) internal successors, (6960), 45 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:28,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:28,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 246 [2021-11-20 06:07:28,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:36,493 INFO L129 PetriNetUnfolder]: 9398/24776 cut-off events. [2021-11-20 06:07:36,493 INFO L130 PetriNetUnfolder]: For 5691/5781 co-relation queries the response was YES. [2021-11-20 06:07:36,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47602 conditions, 24776 events. 9398/24776 cut-off events. For 5691/5781 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 276874 event pairs, 2090 based on Foata normal form. 2/23440 useless extension candidates. Maximal degree in co-relation 47565. Up to 4311 conditions per place. [2021-11-20 06:07:36,812 INFO L132 encePairwiseOnDemand]: 213/246 looper letters, 337 selfloop transitions, 86 changer transitions 0/559 dead transitions. [2021-11-20 06:07:36,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 559 transitions, 2408 flow [2021-11-20 06:07:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 06:07:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-20 06:07:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 7049 transitions. [2021-11-20 06:07:36,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6512379896526238 [2021-11-20 06:07:36,823 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 7049 transitions. [2021-11-20 06:07:36,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 7049 transitions. [2021-11-20 06:07:36,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:36,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 7049 transitions. [2021-11-20 06:07:36,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 160.20454545454547) internal successors, (7049), 44 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:36,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 246.0) internal successors, (11070), 45 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:36,856 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 246.0) internal successors, (11070), 45 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:36,856 INFO L186 Difference]: Start difference. First operand has 276 places, 236 transitions, 763 flow. Second operand 44 states and 7049 transitions. [2021-11-20 06:07:36,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 559 transitions, 2408 flow [2021-11-20 06:07:36,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 559 transitions, 2375 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-11-20 06:07:36,899 INFO L242 Difference]: Finished difference. Result has 333 places, 302 transitions, 1290 flow [2021-11-20 06:07:36,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1290, PETRI_PLACES=333, PETRI_TRANSITIONS=302} [2021-11-20 06:07:36,900 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 116 predicate places. [2021-11-20 06:07:36,901 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 302 transitions, 1290 flow [2021-11-20 06:07:36,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 154.66666666666666) internal successors, (6960), 45 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:36,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:36,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:36,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:37,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:37,116 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash -569889506, now seen corresponding path program 1 times [2021-11-20 06:07:37,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:37,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679514453] [2021-11-20 06:07:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:37,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:37,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679514453] [2021-11-20 06:07:37,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679514453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:07:37,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25903992] [2021-11-20 06:07:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:37,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:37,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:37,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:37,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:07:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:37,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 06:07:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:37,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:07:37,704 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:07:37,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 06:07:37,876 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 06:07:37,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-20 06:07:38,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:07:38,706 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-20 06:07:38,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2021-11-20 06:07:38,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 06:07:39,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 06:07:39,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 06:07:39,740 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:07:39,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-20 06:07:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:39,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:41,345 WARN L838 $PredicateComparison]: unable to prove that (forall ((~get2~0.base Int) (|ULTIMATE.start_main_#t~pre23#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre23#1|)))) (let ((.cse2 (select .cse3 ~get2~0.base)) (.cse0 (select .cse3 c_~get1~0.base))) (or (not (let ((.cse1 (* c_thread1Thread1of1ForFork0_~i~0 4))) (= (select .cse0 (+ c_~get1~0.offset .cse1)) (select .cse2 (+ c_~get2~0.offset .cse1))))) (= (select .cse2 c_~get2~0.offset) (select .cse0 c_~get1~0.offset)))))) is different from false [2021-11-20 06:07:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:41,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25903992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:41,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:07:41,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 10] total 50 [2021-11-20 06:07:41,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356876445] [2021-11-20 06:07:41,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:41,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 06:07:41,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 06:07:41,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2164, Unknown=1, NotChecked=94, Total=2450 [2021-11-20 06:07:41,550 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 246 [2021-11-20 06:07:41,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 302 transitions, 1290 flow. Second operand has 50 states, 50 states have (on average 155.32) internal successors, (7766), 50 states have internal predecessors, (7766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:41,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:41,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 246 [2021-11-20 06:07:41,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:07:53,867 INFO L129 PetriNetUnfolder]: 15481/37040 cut-off events. [2021-11-20 06:07:53,868 INFO L130 PetriNetUnfolder]: For 48559/48751 co-relation queries the response was YES. [2021-11-20 06:07:54,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98190 conditions, 37040 events. 15481/37040 cut-off events. For 48559/48751 co-relation queries the response was YES. Maximal size of possible extension queue 1438. Compared 420860 event pairs, 4247 based on Foata normal form. 126/36468 useless extension candidates. Maximal degree in co-relation 98131. Up to 5818 conditions per place. [2021-11-20 06:07:54,530 INFO L132 encePairwiseOnDemand]: 207/246 looper letters, 416 selfloop transitions, 171 changer transitions 0/724 dead transitions. [2021-11-20 06:07:54,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 724 transitions, 4593 flow [2021-11-20 06:07:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 06:07:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-20 06:07:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7728 transitions. [2021-11-20 06:07:54,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2021-11-20 06:07:54,542 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7728 transitions. [2021-11-20 06:07:54,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7728 transitions. [2021-11-20 06:07:54,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:07:54,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7728 transitions. [2021-11-20 06:07:54,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 161.0) internal successors, (7728), 48 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:54,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 246.0) internal successors, (12054), 49 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:54,576 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 246.0) internal successors, (12054), 49 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:54,577 INFO L186 Difference]: Start difference. First operand has 333 places, 302 transitions, 1290 flow. Second operand 48 states and 7728 transitions. [2021-11-20 06:07:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 724 transitions, 4593 flow [2021-11-20 06:07:55,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 724 transitions, 4554 flow, removed 0 selfloop flow, removed 17 redundant places. [2021-11-20 06:07:55,443 INFO L242 Difference]: Finished difference. Result has 383 places, 419 transitions, 2660 flow [2021-11-20 06:07:55,444 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2660, PETRI_PLACES=383, PETRI_TRANSITIONS=419} [2021-11-20 06:07:55,444 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 166 predicate places. [2021-11-20 06:07:55,444 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 419 transitions, 2660 flow [2021-11-20 06:07:55,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 155.32) internal successors, (7766), 50 states have internal predecessors, (7766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:55,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:07:55,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:55,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 06:07:55,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:55,671 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:07:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:55,671 INFO L85 PathProgramCache]: Analyzing trace with hash -798932080, now seen corresponding path program 2 times [2021-11-20 06:07:55,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:55,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108580732] [2021-11-20 06:07:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:55,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:56,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:56,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108580732] [2021-11-20 06:07:56,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108580732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:56,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:56,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-20 06:07:56,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274146307] [2021-11-20 06:07:56,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:56,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:07:56,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:56,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:07:56,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:07:56,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2021-11-20 06:07:56,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 419 transitions, 2660 flow. Second operand has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:56,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:07:56,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2021-11-20 06:07:56,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:08:09,871 INFO L129 PetriNetUnfolder]: 18702/48201 cut-off events. [2021-11-20 06:08:09,872 INFO L130 PetriNetUnfolder]: For 109386/109641 co-relation queries the response was YES. [2021-11-20 06:08:10,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141036 conditions, 48201 events. 18702/48201 cut-off events. For 109386/109641 co-relation queries the response was YES. Maximal size of possible extension queue 1874. Compared 594331 event pairs, 8789 based on Foata normal form. 55/47123 useless extension candidates. Maximal degree in co-relation 140957. Up to 11348 conditions per place. [2021-11-20 06:08:10,950 INFO L132 encePairwiseOnDemand]: 217/246 looper letters, 372 selfloop transitions, 93 changer transitions 0/635 dead transitions. [2021-11-20 06:08:10,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 635 transitions, 5014 flow [2021-11-20 06:08:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:08:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-20 06:08:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3814 transitions. [2021-11-20 06:08:10,957 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7382888114595432 [2021-11-20 06:08:10,958 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3814 transitions. [2021-11-20 06:08:10,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3814 transitions. [2021-11-20 06:08:10,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:08:10,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3814 transitions. [2021-11-20 06:08:10,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.61904761904762) internal successors, (3814), 21 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:10,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 246.0) internal successors, (5412), 22 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:10,973 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 246.0) internal successors, (5412), 22 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:10,974 INFO L186 Difference]: Start difference. First operand has 383 places, 419 transitions, 2660 flow. Second operand 21 states and 3814 transitions. [2021-11-20 06:08:10,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 635 transitions, 5014 flow [2021-11-20 06:08:14,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 635 transitions, 4778 flow, removed 57 selfloop flow, removed 21 redundant places. [2021-11-20 06:08:14,804 INFO L242 Difference]: Finished difference. Result has 392 places, 450 transitions, 3036 flow [2021-11-20 06:08:14,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3036, PETRI_PLACES=392, PETRI_TRANSITIONS=450} [2021-11-20 06:08:14,805 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 175 predicate places. [2021-11-20 06:08:14,805 INFO L470 AbstractCegarLoop]: Abstraction has has 392 places, 450 transitions, 3036 flow [2021-11-20 06:08:14,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:14,806 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:08:14,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:14,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:08:14,806 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:08:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash -353935500, now seen corresponding path program 3 times [2021-11-20 06:08:14,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:14,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946612956] [2021-11-20 06:08:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:14,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:08:15,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:15,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946612956] [2021-11-20 06:08:15,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946612956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:15,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480397768] [2021-11-20 06:08:15,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:08:15,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:15,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:15,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:15,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:08:15,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:08:15,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:15,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 06:08:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:16,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:08:16,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:08:16,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:08:17,089 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:08:17,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-20 06:08:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:08:17,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:19,744 WARN L838 $PredicateComparison]: unable to prove that (forall ((~get1~0.base Int) (|ULTIMATE.start_main_#t~pre23#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre23#1|)))) (let ((.cse1 (select .cse3 ~get1~0.base)) (.cse0 (select .cse3 c_~get2~0.base))) (or (not (= (select .cse0 c_~get2~0.offset) (select .cse1 c_~get1~0.offset))) (let ((.cse2 (* c_thread1Thread1of1ForFork0_~i~0 4))) (= (select .cse1 (+ c_~get1~0.offset .cse2)) (select .cse0 (+ c_~get2~0.offset .cse2)))))))) is different from false [2021-11-20 06:08:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:08:19,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480397768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:19,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:08:19,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 10] total 46 [2021-11-20 06:08:19,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380611699] [2021-11-20 06:08:19,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:19,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 06:08:19,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 06:08:19,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1777, Unknown=2, NotChecked=86, Total=2070 [2021-11-20 06:08:19,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 246 [2021-11-20 06:08:19,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 450 transitions, 3036 flow. Second operand has 46 states, 46 states have (on average 157.43478260869566) internal successors, (7242), 46 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:19,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:08:19,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 246 [2021-11-20 06:08:19,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:08:39,599 INFO L129 PetriNetUnfolder]: 20242/51376 cut-off events. [2021-11-20 06:08:39,599 INFO L130 PetriNetUnfolder]: For 145896/146223 co-relation queries the response was YES. [2021-11-20 06:08:40,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155943 conditions, 51376 events. 20242/51376 cut-off events. For 145896/146223 co-relation queries the response was YES. Maximal size of possible extension queue 2018. Compared 632420 event pairs, 7762 based on Foata normal form. 169/50256 useless extension candidates. Maximal degree in co-relation 155854. Up to 10368 conditions per place. [2021-11-20 06:08:40,893 INFO L132 encePairwiseOnDemand]: 207/246 looper letters, 409 selfloop transitions, 252 changer transitions 0/800 dead transitions. [2021-11-20 06:08:40,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 800 transitions, 6843 flow [2021-11-20 06:08:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 06:08:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-20 06:08:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6865 transitions. [2021-11-20 06:08:40,905 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6644405729771583 [2021-11-20 06:08:40,905 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6865 transitions. [2021-11-20 06:08:40,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6865 transitions. [2021-11-20 06:08:40,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:08:40,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6865 transitions. [2021-11-20 06:08:40,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 163.45238095238096) internal successors, (6865), 42 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:40,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 246.0) internal successors, (10578), 43 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:40,935 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 246.0) internal successors, (10578), 43 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:40,936 INFO L186 Difference]: Start difference. First operand has 392 places, 450 transitions, 3036 flow. Second operand 42 states and 6865 transitions. [2021-11-20 06:08:40,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 800 transitions, 6843 flow [2021-11-20 06:08:45,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 800 transitions, 6660 flow, removed 58 selfloop flow, removed 9 redundant places. [2021-11-20 06:08:45,945 INFO L242 Difference]: Finished difference. Result has 438 places, 547 transitions, 4707 flow [2021-11-20 06:08:45,946 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4707, PETRI_PLACES=438, PETRI_TRANSITIONS=547} [2021-11-20 06:08:45,947 INFO L334 CegarLoopForPetriNet]: 217 programPoint places, 221 predicate places. [2021-11-20 06:08:45,947 INFO L470 AbstractCegarLoop]: Abstraction has has 438 places, 547 transitions, 4707 flow [2021-11-20 06:08:45,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 157.43478260869566) internal successors, (7242), 46 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:45,949 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:08:45,949 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:45,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:46,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:46,176 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:08:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash 876253992, now seen corresponding path program 4 times [2021-11-20 06:08:46,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:46,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51846503] [2021-11-20 06:08:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:46,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:08:46,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51846503] [2021-11-20 06:08:46,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51846503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530364310] [2021-11-20 06:08:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:08:46,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:46,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:46,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49d14a3c-c440-4fe8-a263-52c5bb3ae2e8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:08:46,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:08:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:46,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 06:08:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:47,518 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:08:47,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-20 06:08:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:08:47,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:47,928 INFO L354 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2021-11-20 06:08:47,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2021-11-20 06:08:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:08:48,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530364310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:48,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:08:48,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 9] total 29 [2021-11-20 06:08:48,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552841893] [2021-11-20 06:08:48,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:48,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:08:48,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:08:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:08:48,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2021-11-20 06:08:48,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 547 transitions, 4707 flow. Second operand has 29 states, 29 states have (on average 174.3448275862069) internal successors, (5056), 29 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:48,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:08:48,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2021-11-20 06:08:48,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand