./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3.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_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/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_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/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_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/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 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:30:38,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:30:38,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:30:39,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:30:39,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:30:39,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:30:39,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:30:39,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:30:39,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:30:39,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:30:39,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:30:39,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:30:39,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:30:39,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:30:39,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:30:39,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:30:39,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:30:39,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:30:39,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:30:39,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:30:39,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:30:39,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:30:39,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:30:39,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:30:39,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:30:39,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:30:39,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:30:39,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:30:39,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:30:39,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:30:39,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:30:39,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:30:39,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:30:39,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:30:39,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:30:39,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:30:39,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:30:39,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:30:39,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:30:39,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:30:39,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:30:39,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:30:39,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:30:39,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:30:39,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:30:39,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:30:39,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:30:39,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:30:39,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:30:39,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:30:39,124 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:30:39,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:30:39,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:30:39,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:30:39,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:30:39,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:30:39,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:30:39,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:30:39,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:30:39,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:30:39,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:30:39,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:30:39,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:30:39,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:30:39,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:30:39,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:30:39,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:30:39,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:30:39,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:30:39,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:30:39,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:30:39,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:30:39,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:30:39,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:30:39,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:30:39,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:30:39,131 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_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 [2021-11-20 06:30:39,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:30:39,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:30:39,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:30:39,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:30:39,468 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:30:39,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-11-20 06:30:39,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/data/7a7eadc1a/a62bd813f24841f1a105c2a51f0fa7f3/FLAGc63a18708 [2021-11-20 06:30:39,977 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:30:39,977 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-11-20 06:30:40,000 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/data/7a7eadc1a/a62bd813f24841f1a105c2a51f0fa7f3/FLAGc63a18708 [2021-11-20 06:30:40,361 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/data/7a7eadc1a/a62bd813f24841f1a105c2a51f0fa7f3 [2021-11-20 06:30:40,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:30:40,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:30:40,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:30:40,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:30:40,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:30:40,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5da4c795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40, skipping insertion in model container [2021-11-20 06:30:40,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:30:40,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:30:40,594 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_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2021-11-20 06:30:40,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:30:40,607 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:30:40,635 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_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2021-11-20 06:30:40,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:30:40,651 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:30:40,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40 WrapperNode [2021-11-20 06:30:40,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:30:40,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:30:40,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:30:40,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:30:40,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,704 INFO L137 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2021-11-20 06:30:40,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:30:40,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:30:40,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:30:40,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:30:40,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:30:40,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:30:40,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:30:40,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:30:40,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (1/1) ... [2021-11-20 06:30:40,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:30:40,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:30:40,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:30:40,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:30:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:30:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 06:30:40,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 06:30:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 06:30:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 06:30:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-20 06:30:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-20 06:30:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-20 06:30:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-20 06:30:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:30:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-11-20 06:30:40,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-11-20 06:30:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-11-20 06:30:40,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-11-20 06:30:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:30:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:30:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:30:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:30:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:30:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:30:40,882 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 06:30:41,004 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:30:41,006 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:30:41,297 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:30:41,308 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:30:41,308 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 06:30:41,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:30:41 BoogieIcfgContainer [2021-11-20 06:30:41,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:30:41,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:30:41,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:30:41,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:30:41,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:30:40" (1/3) ... [2021-11-20 06:30:41,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2ce8e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:30:41, skipping insertion in model container [2021-11-20 06:30:41,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:30:40" (2/3) ... [2021-11-20 06:30:41,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2ce8e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:30:41, skipping insertion in model container [2021-11-20 06:30:41,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:30:41" (3/3) ... [2021-11-20 06:30:41,320 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2021-11-20 06:30:41,326 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:30:41,326 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:30:41,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:30:41,326 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:30:41,367 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,369 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,369 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,369 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,369 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,370 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,370 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,370 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,371 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,371 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,371 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,372 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,372 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,372 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,373 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,373 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,373 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,374 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,374 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,374 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,374 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,378 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,381 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,381 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,382 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,383 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,384 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,384 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,386 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,387 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:30:41,410 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-11-20 06:30:41,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:30:41,503 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 06:30:41,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-20 06:30:41,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2021-11-20 06:30:41,688 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2021-11-20 06:30:41,689 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-20 06:30:41,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2021-11-20 06:30:41,696 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2021-11-20 06:30:41,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2021-11-20 06:30:41,814 INFO L129 PetriNetUnfolder]: 14/145 cut-off events. [2021-11-20 06:30:41,814 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-20 06:30:41,815 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:30:41,816 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] [2021-11-20 06:30:41,817 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:30:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1565365569, now seen corresponding path program 1 times [2021-11-20 06:30:41,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:41,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265702094] [2021-11-20 06:30:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:41,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:42,204 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 06:30:42,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265702094] [2021-11-20 06:30:42,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265702094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:42,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:42,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:30:42,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841815340] [2021-11-20 06:30:42,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:42,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:30:42,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:30:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:30:42,282 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 169 [2021-11-20 06:30:42,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 328 flow. Second operand has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 06:30:42,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:30:42,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 169 [2021-11-20 06:30:42,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:30:42,389 INFO L129 PetriNetUnfolder]: 6/138 cut-off events. [2021-11-20 06:30:42,390 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-11-20 06:30:42,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 138 events. 6/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 38/168 useless extension candidates. Maximal degree in co-relation 119. Up to 13 conditions per place. [2021-11-20 06:30:42,395 INFO L132 encePairwiseOnDemand]: 161/169 looper letters, 12 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2021-11-20 06:30:42,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 336 flow [2021-11-20 06:30:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:30:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:30:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 316 transitions. [2021-11-20 06:30:42,419 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9349112426035503 [2021-11-20 06:30:42,427 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 316 transitions. [2021-11-20 06:30:42,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 316 transitions. [2021-11-20 06:30:42,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:30:42,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 316 transitions. [2021-11-20 06:30:42,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 06:30:42,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 06:30:42,452 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 06:30:42,454 INFO L186 Difference]: Start difference. First operand has 151 places, 146 transitions, 328 flow. Second operand 2 states and 316 transitions. [2021-11-20 06:30:42,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 336 flow [2021-11-20 06:30:42,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2021-11-20 06:30:42,474 INFO L242 Difference]: Finished difference. Result has 140 places, 136 transitions, 284 flow [2021-11-20 06:30:42,477 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2021-11-20 06:30:42,482 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -11 predicate places. [2021-11-20 06:30:42,482 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 284 flow [2021-11-20 06:30:42,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 06:30:42,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:30:42,483 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] [2021-11-20 06:30:42,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:30:42,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:30:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash -616084000, now seen corresponding path program 1 times [2021-11-20 06:30:42,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:42,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344314113] [2021-11-20 06:30:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:42,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:43,501 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 06:30:43,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344314113] [2021-11-20 06:30:43,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344314113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:43,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:43,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:30:43,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047035886] [2021-11-20 06:30:43,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:43,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:30:43,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:30:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:30:43,508 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2021-11-20 06:30:43,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 06:30:43,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:30:43,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2021-11-20 06:30:43,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:30:47,619 INFO L129 PetriNetUnfolder]: 13855/19795 cut-off events. [2021-11-20 06:30:47,619 INFO L130 PetriNetUnfolder]: For 728/910 co-relation queries the response was YES. [2021-11-20 06:30:47,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37315 conditions, 19795 events. 13855/19795 cut-off events. For 728/910 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 113714 event pairs, 8389 based on Foata normal form. 1/13760 useless extension candidates. Maximal degree in co-relation 37312. Up to 10952 conditions per place. [2021-11-20 06:30:47,887 INFO L132 encePairwiseOnDemand]: 157/169 looper letters, 69 selfloop transitions, 9 changer transitions 4/168 dead transitions. [2021-11-20 06:30:47,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 523 flow [2021-11-20 06:30:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:30:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 06:30:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 839 transitions. [2021-11-20 06:30:47,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7092138630600169 [2021-11-20 06:30:47,893 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 839 transitions. [2021-11-20 06:30:47,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 839 transitions. [2021-11-20 06:30:47,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:30:47,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 839 transitions. [2021-11-20 06:30:47,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.85714285714286) internal successors, (839), 7 states have internal predecessors, (839), 0 states have call successors, (0), 0 states 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 06:30:47,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 06:30:47,904 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 06:30:47,904 INFO L186 Difference]: Start difference. First operand has 140 places, 136 transitions, 284 flow. Second operand 7 states and 839 transitions. [2021-11-20 06:30:47,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 523 flow [2021-11-20 06:30:47,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:30:47,911 INFO L242 Difference]: Finished difference. Result has 147 places, 142 transitions, 339 flow [2021-11-20 06:30:47,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2021-11-20 06:30:47,913 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2021-11-20 06:30:47,913 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 339 flow [2021-11-20 06:30:47,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 06:30:47,914 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:30:47,915 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:47,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:30:47,915 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:30:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1758121540, now seen corresponding path program 1 times [2021-11-20 06:30:47,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:47,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593737425] [2021-11-20 06:30:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:47,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:48,400 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 06:30:48,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:48,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593737425] [2021-11-20 06:30:48,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593737425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:48,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:48,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:30:48,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243988794] [2021-11-20 06:30:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:48,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:30:48,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:30:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:30:48,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-11-20 06:30:48,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:30:48,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:30:48,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-11-20 06:30:48,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:30:51,506 INFO L129 PetriNetUnfolder]: 13532/20062 cut-off events. [2021-11-20 06:30:51,507 INFO L130 PetriNetUnfolder]: For 4486/4730 co-relation queries the response was YES. [2021-11-20 06:30:51,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44924 conditions, 20062 events. 13532/20062 cut-off events. For 4486/4730 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 124546 event pairs, 1500 based on Foata normal form. 2/14619 useless extension candidates. Maximal degree in co-relation 44917. Up to 10954 conditions per place. [2021-11-20 06:30:51,728 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 84 selfloop transitions, 17 changer transitions 1/186 dead transitions. [2021-11-20 06:30:51,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 186 transitions, 665 flow [2021-11-20 06:30:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:30:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:30:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 740 transitions. [2021-11-20 06:30:51,734 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7297830374753451 [2021-11-20 06:30:51,734 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 740 transitions. [2021-11-20 06:30:51,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 740 transitions. [2021-11-20 06:30:51,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:30:51,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 740 transitions. [2021-11-20 06:30:51,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 06:30:51,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:30:51,742 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:30:51,742 INFO L186 Difference]: Start difference. First operand has 147 places, 142 transitions, 339 flow. Second operand 6 states and 740 transitions. [2021-11-20 06:30:51,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 186 transitions, 665 flow [2021-11-20 06:30:51,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 186 transitions, 644 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-11-20 06:30:51,759 INFO L242 Difference]: Finished difference. Result has 147 places, 150 transitions, 411 flow [2021-11-20 06:30:51,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=147, PETRI_TRANSITIONS=150} [2021-11-20 06:30:51,762 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2021-11-20 06:30:51,763 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 150 transitions, 411 flow [2021-11-20 06:30:51,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:30:51,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:30:51,768 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] [2021-11-20 06:30:51,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:30:51,769 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:30:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash 793584122, now seen corresponding path program 2 times [2021-11-20 06:30:51,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:51,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271627080] [2021-11-20 06:30:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:51,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:52,276 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 06:30:52,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:52,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271627080] [2021-11-20 06:30:52,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271627080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:52,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:52,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:30:52,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739964186] [2021-11-20 06:30:52,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:52,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:30:52,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:30:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:30:52,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-11-20 06:30:52,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 150 transitions, 411 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:30:52,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:30:52,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-11-20 06:30:52,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:30:54,777 INFO L129 PetriNetUnfolder]: 11953/17302 cut-off events. [2021-11-20 06:30:54,778 INFO L130 PetriNetUnfolder]: For 10725/10823 co-relation queries the response was YES. [2021-11-20 06:30:54,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43498 conditions, 17302 events. 11953/17302 cut-off events. For 10725/10823 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 99102 event pairs, 6295 based on Foata normal form. 242/13506 useless extension candidates. Maximal degree in co-relation 43491. Up to 10239 conditions per place. [2021-11-20 06:30:55,082 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 86 selfloop transitions, 19 changer transitions 1/190 dead transitions. [2021-11-20 06:30:55,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 190 transitions, 741 flow [2021-11-20 06:30:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:30:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:30:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2021-11-20 06:30:55,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2021-11-20 06:30:55,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2021-11-20 06:30:55,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2021-11-20 06:30:55,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:30:55,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2021-11-20 06:30:55,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 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 06:30:55,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:30:55,095 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:30:55,095 INFO L186 Difference]: Start difference. First operand has 147 places, 150 transitions, 411 flow. Second operand 6 states and 738 transitions. [2021-11-20 06:30:55,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 190 transitions, 741 flow [2021-11-20 06:30:55,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 190 transitions, 707 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:30:55,116 INFO L242 Difference]: Finished difference. Result has 150 places, 154 transitions, 464 flow [2021-11-20 06:30:55,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=464, PETRI_PLACES=150, PETRI_TRANSITIONS=154} [2021-11-20 06:30:55,118 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -1 predicate places. [2021-11-20 06:30:55,118 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 154 transitions, 464 flow [2021-11-20 06:30:55,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:30:55,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:30:55,119 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] [2021-11-20 06:30:55,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:30:55,120 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:30:55,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash 564301324, now seen corresponding path program 1 times [2021-11-20 06:30:55,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:55,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006475065] [2021-11-20 06:30:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:55,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:55,528 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 06:30:55,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:55,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006475065] [2021-11-20 06:30:55,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006475065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:55,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:55,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:30:55,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228318202] [2021-11-20 06:30:55,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:55,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:30:55,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:30:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:30:55,532 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-11-20 06:30:55,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 154 transitions, 464 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:30:55,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:30:55,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-11-20 06:30:55,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:30:57,743 INFO L129 PetriNetUnfolder]: 11708/17023 cut-off events. [2021-11-20 06:30:57,744 INFO L130 PetriNetUnfolder]: For 13788/13887 co-relation queries the response was YES. [2021-11-20 06:30:57,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46592 conditions, 17023 events. 11708/17023 cut-off events. For 13788/13887 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 98298 event pairs, 4241 based on Foata normal form. 0/13355 useless extension candidates. Maximal degree in co-relation 46583. Up to 10239 conditions per place. [2021-11-20 06:30:57,908 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 92 selfloop transitions, 33 changer transitions 1/210 dead transitions. [2021-11-20 06:30:57,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 210 transitions, 976 flow [2021-11-20 06:30:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:30:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:30:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 740 transitions. [2021-11-20 06:30:57,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7297830374753451 [2021-11-20 06:30:57,912 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 740 transitions. [2021-11-20 06:30:57,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 740 transitions. [2021-11-20 06:30:57,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:30:57,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 740 transitions. [2021-11-20 06:30:57,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 06:30:57,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:30:57,922 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:30:57,922 INFO L186 Difference]: Start difference. First operand has 150 places, 154 transitions, 464 flow. Second operand 6 states and 740 transitions. [2021-11-20 06:30:57,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 210 transitions, 976 flow [2021-11-20 06:30:57,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 210 transitions, 931 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-11-20 06:30:57,948 INFO L242 Difference]: Finished difference. Result has 154 places, 170 transitions, 650 flow [2021-11-20 06:30:57,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=650, PETRI_PLACES=154, PETRI_TRANSITIONS=170} [2021-11-20 06:30:57,952 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 3 predicate places. [2021-11-20 06:30:57,952 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 170 transitions, 650 flow [2021-11-20 06:30:57,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:30:57,953 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:30:57,953 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] [2021-11-20 06:30:57,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:30:57,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:30:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2100731144, now seen corresponding path program 1 times [2021-11-20 06:30:57,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:57,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584697319] [2021-11-20 06:30:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:57,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:58,439 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 06:30:58,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:58,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584697319] [2021-11-20 06:30:58,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584697319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:58,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:58,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:30:58,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738164219] [2021-11-20 06:30:58,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:58,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:30:58,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:30:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:30:58,443 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-11-20 06:30:58,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 170 transitions, 650 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:30:58,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:30:58,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-11-20 06:30:58,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:31:00,797 INFO L129 PetriNetUnfolder]: 11519/17815 cut-off events. [2021-11-20 06:31:00,797 INFO L130 PetriNetUnfolder]: For 20383/20535 co-relation queries the response was YES. [2021-11-20 06:31:00,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51539 conditions, 17815 events. 11519/17815 cut-off events. For 20383/20535 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 117689 event pairs, 2574 based on Foata normal form. 0/15978 useless extension candidates. Maximal degree in co-relation 51528. Up to 10239 conditions per place. [2021-11-20 06:31:01,007 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 96 selfloop transitions, 61 changer transitions 1/242 dead transitions. [2021-11-20 06:31:01,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 242 transitions, 1414 flow [2021-11-20 06:31:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:31:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:31:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 740 transitions. [2021-11-20 06:31:01,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7297830374753451 [2021-11-20 06:31:01,016 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 740 transitions. [2021-11-20 06:31:01,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 740 transitions. [2021-11-20 06:31:01,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:31:01,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 740 transitions. [2021-11-20 06:31:01,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 06:31:01,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:31:01,024 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:31:01,025 INFO L186 Difference]: Start difference. First operand has 154 places, 170 transitions, 650 flow. Second operand 6 states and 740 transitions. [2021-11-20 06:31:01,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 242 transitions, 1414 flow [2021-11-20 06:31:01,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 242 transitions, 1353 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-11-20 06:31:01,050 INFO L242 Difference]: Finished difference. Result has 158 places, 200 transitions, 1064 flow [2021-11-20 06:31:01,050 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1064, PETRI_PLACES=158, PETRI_TRANSITIONS=200} [2021-11-20 06:31:01,054 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 7 predicate places. [2021-11-20 06:31:01,054 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 200 transitions, 1064 flow [2021-11-20 06:31:01,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:31:01,055 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:31:01,055 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] [2021-11-20 06:31:01,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:31:01,056 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:31:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:01,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1363181104, now seen corresponding path program 2 times [2021-11-20 06:31:01,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:01,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847118244] [2021-11-20 06:31:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:01,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:01,493 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 06:31:01,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:01,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847118244] [2021-11-20 06:31:01,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847118244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:31:01,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:31:01,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:31:01,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858628878] [2021-11-20 06:31:01,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:31:01,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:31:01,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:31:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:31:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:31:01,499 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-11-20 06:31:01,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 200 transitions, 1064 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:31:01,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:31:01,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-11-20 06:31:01,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:31:03,780 INFO L129 PetriNetUnfolder]: 10456/15109 cut-off events. [2021-11-20 06:31:03,780 INFO L130 PetriNetUnfolder]: For 22692/22849 co-relation queries the response was YES. [2021-11-20 06:31:03,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48255 conditions, 15109 events. 10456/15109 cut-off events. For 22692/22849 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 84754 event pairs, 4444 based on Foata normal form. 236/14493 useless extension candidates. Maximal degree in co-relation 48242. Up to 9750 conditions per place. [2021-11-20 06:31:03,920 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 98 selfloop transitions, 65 changer transitions 1/248 dead transitions. [2021-11-20 06:31:03,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 248 transitions, 1620 flow [2021-11-20 06:31:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:31:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:31:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2021-11-20 06:31:03,924 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2021-11-20 06:31:03,924 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2021-11-20 06:31:03,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2021-11-20 06:31:03,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:31:03,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2021-11-20 06:31:03,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 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 06:31:03,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:31:03,935 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 06:31:03,936 INFO L186 Difference]: Start difference. First operand has 158 places, 200 transitions, 1064 flow. Second operand 6 states and 738 transitions. [2021-11-20 06:31:03,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 248 transitions, 1620 flow [2021-11-20 06:31:03,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 248 transitions, 1555 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-11-20 06:31:03,973 INFO L242 Difference]: Finished difference. Result has 162 places, 206 transitions, 1258 flow [2021-11-20 06:31:03,974 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1258, PETRI_PLACES=162, PETRI_TRANSITIONS=206} [2021-11-20 06:31:03,975 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 11 predicate places. [2021-11-20 06:31:03,975 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 206 transitions, 1258 flow [2021-11-20 06:31:03,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 06:31:03,976 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:31:03,976 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] [2021-11-20 06:31:03,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:31:03,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:31:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1405767594, now seen corresponding path program 1 times [2021-11-20 06:31:03,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:03,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7180782] [2021-11-20 06:31:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:03,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:04,335 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 06:31:04,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7180782] [2021-11-20 06:31:04,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7180782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:31:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944100418] [2021-11-20 06:31:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:04,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:04,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:04,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:31:04,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:31:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:04,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:31:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:32:26,696 WARN L227 SmtUtils]: Spent 1.21m on a formula simplification. DAG size of input: 10359 DAG size of output: 2073 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:32:35,654 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 06:32:35,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:36,240 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 06:32:36,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944100418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:36,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:32:36,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-11-20 06:32:36,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74408812] [2021-11-20 06:32:36,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:36,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:32:36,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:32:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:32:36,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-11-20 06:32:36,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 206 transitions, 1258 flow. Second operand has 14 states, 14 states have (on average 111.71428571428571) internal successors, (1564), 14 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states 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 06:32:36,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:32:36,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-11-20 06:32:36,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:32:40,287 INFO L129 PetriNetUnfolder]: 21485/30717 cut-off events. [2021-11-20 06:32:40,287 INFO L130 PetriNetUnfolder]: For 41091/41264 co-relation queries the response was YES. [2021-11-20 06:32:40,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92778 conditions, 30717 events. 21485/30717 cut-off events. For 41091/41264 co-relation queries the response was YES. Maximal size of possible extension queue 1751. Compared 192672 event pairs, 2473 based on Foata normal form. 754/30830 useless extension candidates. Maximal degree in co-relation 92763. Up to 8300 conditions per place. [2021-11-20 06:32:40,577 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 219 selfloop transitions, 74 changer transitions 2/379 dead transitions. [2021-11-20 06:32:40,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 379 transitions, 2482 flow [2021-11-20 06:32:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:32:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 06:32:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1723 transitions. [2021-11-20 06:32:40,583 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7282333051563821 [2021-11-20 06:32:40,584 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1723 transitions. [2021-11-20 06:32:40,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1723 transitions. [2021-11-20 06:32:40,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:32:40,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1723 transitions. [2021-11-20 06:32:40,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.07142857142857) internal successors, (1723), 14 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states 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 06:32:40,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states 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 06:32:40,599 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states 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 06:32:40,599 INFO L186 Difference]: Start difference. First operand has 162 places, 206 transitions, 1258 flow. Second operand 14 states and 1723 transitions. [2021-11-20 06:32:40,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 379 transitions, 2482 flow [2021-11-20 06:32:40,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 379 transitions, 2387 flow, removed 18 selfloop flow, removed 3 redundant places. [2021-11-20 06:32:40,713 INFO L242 Difference]: Finished difference. Result has 181 places, 214 transitions, 1483 flow [2021-11-20 06:32:40,713 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1483, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2021-11-20 06:32:40,714 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 30 predicate places. [2021-11-20 06:32:40,714 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 1483 flow [2021-11-20 06:32:40,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 111.71428571428571) internal successors, (1564), 14 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states 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 06:32:40,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:32:40,716 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] [2021-11-20 06:32:40,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:32:40,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:40,936 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:32:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1333412910, now seen corresponding path program 1 times [2021-11-20 06:32:40,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:40,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070085121] [2021-11-20 06:32:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:40,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:41,296 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 06:32:41,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070085121] [2021-11-20 06:32:41,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070085121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:32:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839580798] [2021-11-20 06:32:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:41,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:41,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:32:41,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:32:41,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:32:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:32:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:32:42,067 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 06:32:42,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:43,278 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 06:32:43,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839580798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:43,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:32:43,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-11-20 06:32:43,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883858537] [2021-11-20 06:32:43,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:43,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:32:43,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:32:43,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:32:43,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-11-20 06:32:43,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 1483 flow. Second operand has 14 states, 14 states have (on average 111.5) internal successors, (1561), 14 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 06:32:43,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:32:43,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-11-20 06:32:43,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:32:52,855 INFO L129 PetriNetUnfolder]: 58020/82648 cut-off events. [2021-11-20 06:32:52,855 INFO L130 PetriNetUnfolder]: For 169097/169377 co-relation queries the response was YES. [2021-11-20 06:32:53,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 274983 conditions, 82648 events. 58020/82648 cut-off events. For 169097/169377 co-relation queries the response was YES. Maximal size of possible extension queue 4131. Compared 584709 event pairs, 9396 based on Foata normal form. 2163/82281 useless extension candidates. Maximal degree in co-relation 274960. Up to 23704 conditions per place. [2021-11-20 06:32:53,864 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 297 selfloop transitions, 76 changer transitions 2/459 dead transitions. [2021-11-20 06:32:53,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 459 transitions, 3635 flow [2021-11-20 06:32:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:32:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 06:32:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1725 transitions. [2021-11-20 06:32:53,871 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7290786136939983 [2021-11-20 06:32:53,871 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1725 transitions. [2021-11-20 06:32:53,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1725 transitions. [2021-11-20 06:32:53,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:32:53,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1725 transitions. [2021-11-20 06:32:53,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.21428571428571) internal successors, (1725), 14 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states 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 06:32:53,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states 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 06:32:53,885 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states 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 06:32:53,885 INFO L186 Difference]: Start difference. First operand has 181 places, 214 transitions, 1483 flow. Second operand 14 states and 1725 transitions. [2021-11-20 06:32:53,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 459 transitions, 3635 flow [2021-11-20 06:32:59,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 459 transitions, 3573 flow, removed 28 selfloop flow, removed 3 redundant places. [2021-11-20 06:32:59,296 INFO L242 Difference]: Finished difference. Result has 198 places, 228 transitions, 1794 flow [2021-11-20 06:32:59,296 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1794, PETRI_PLACES=198, PETRI_TRANSITIONS=228} [2021-11-20 06:32:59,297 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 47 predicate places. [2021-11-20 06:32:59,297 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 228 transitions, 1794 flow [2021-11-20 06:32:59,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 111.5) internal successors, (1561), 14 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 06:32:59,298 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:32:59,299 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] [2021-11-20 06:32:59,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:32:59,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7c4ead-a66b-4cb7-ba09-36c4f83b14fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:32:59,513 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-20 06:32:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2102032506, now seen corresponding path program 2 times [2021-11-20 06:32:59,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465248499] [2021-11-20 06:32:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:59,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:59,854 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 06:32:59,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:59,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465248499] [2021-11-20 06:32:59,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465248499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:32:59,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:32:59,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:32:59,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277903890] [2021-11-20 06:32:59,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:32:59,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:32:59,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:32:59,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:32:59,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-11-20 06:32:59,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 228 transitions, 1794 flow. Second operand has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 06:32:59,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:32:59,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-11-20 06:32:59,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand