./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:18:42,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:18:42,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:18:42,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:18:42,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:18:42,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:18:42,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:18:42,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:18:42,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:18:42,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:18:42,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:18:42,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:18:42,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:18:42,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:18:42,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:18:42,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:18:42,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:18:42,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:18:42,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:18:42,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:18:42,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:18:42,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:18:42,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:18:42,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:18:42,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:18:42,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:18:42,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:18:42,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:18:42,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:18:42,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:18:42,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:18:42,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:18:42,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:18:42,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:18:42,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:18:42,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:18:42,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:18:42,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:18:42,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:18:42,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:18:42,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:18:42,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:18:42,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:18:42,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:18:42,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:18:42,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:18:42,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:18:42,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:18:42,275 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:18:42,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:18:42,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:18:42,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:18:42,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:18:42,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:18:42,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:18:42,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:18:42,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:18:42,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:18:42,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:18:42,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:18:42,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:18:42,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:18:42,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:18:42,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:18:42,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:18:42,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:18:42,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:18:42,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:18:42,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:18:42,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:18:42,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:18:42,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:18:42,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:18:42,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:18:42,290 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_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2021-11-22 15:18:42,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:18:42,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:18:42,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:18:42,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:18:42,640 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:18:42,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2021-11-22 15:18:42,751 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/data/69ae414ee/d3384cdf85f1448581fe37bd68cc9136/FLAG5a4fcd747 [2021-11-22 15:18:43,352 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:18:43,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2021-11-22 15:18:43,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/data/69ae414ee/d3384cdf85f1448581fe37bd68cc9136/FLAG5a4fcd747 [2021-11-22 15:18:43,684 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/data/69ae414ee/d3384cdf85f1448581fe37bd68cc9136 [2021-11-22 15:18:43,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:18:43,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:18:43,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:18:43,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:18:43,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:18:43,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:18:43" (1/1) ... [2021-11-22 15:18:43,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1227e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:43, skipping insertion in model container [2021-11-22 15:18:43,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:18:43" (1/1) ... [2021-11-22 15:18:43,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:18:43,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:18:44,002 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_9aa34dc0-476a-47ac-a11f-88041852da92/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2021-11-22 15:18:44,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:18:44,027 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:18:44,053 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_9aa34dc0-476a-47ac-a11f-88041852da92/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2021-11-22 15:18:44,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:18:44,072 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:18:44,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44 WrapperNode [2021-11-22 15:18:44,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:18:44,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:18:44,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:18:44,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:18:44,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,117 INFO L137 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2021-11-22 15:18:44,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:18:44,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:18:44,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:18:44,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:18:44,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:18:44,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:18:44,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:18:44,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:18:44,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (1/1) ... [2021-11-22 15:18:44,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:18:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:18:44,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:18:44,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:18:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:18:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-22 15:18:44,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-22 15:18:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-22 15:18:44,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-22 15:18:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:18:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:18:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:18:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-22 15:18:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-22 15:18:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:18:44,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:18:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:18:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:18:44,293 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-22 15:18:44,404 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:18:44,406 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:18:44,634 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:18:44,699 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:18:44,699 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 15:18:44,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:18:44 BoogieIcfgContainer [2021-11-22 15:18:44,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:18:44,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:18:44,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:18:44,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:18:44,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:18:43" (1/3) ... [2021-11-22 15:18:44,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd4ac01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:18:44, skipping insertion in model container [2021-11-22 15:18:44,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:18:44" (2/3) ... [2021-11-22 15:18:44,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd4ac01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:18:44, skipping insertion in model container [2021-11-22 15:18:44,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:18:44" (3/3) ... [2021-11-22 15:18:44,735 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2021-11-22 15:18:44,755 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-22 15:18:44,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:18:44,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:18:44,755 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-22 15:18:44,794 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,795 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,796 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,796 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,797 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,797 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,797 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,798 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,798 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,798 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,799 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,799 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,799 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,800 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,800 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,800 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,801 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,801 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,802 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,802 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,803 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,803 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,804 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,804 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,804 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,805 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,805 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,805 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,807 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,807 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,807 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,808 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,808 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,808 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,812 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,813 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,813 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,813 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,814 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,816 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,816 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,816 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,817 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:18:44,822 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-22 15:18:44,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:18:44,898 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:18:44,899 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-22 15:18:44,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2021-11-22 15:18:44,999 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2021-11-22 15:18:44,999 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-22 15:18:45,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-11-22 15:18:45,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2021-11-22 15:18:45,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2021-11-22 15:18:45,041 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2021-11-22 15:18:45,042 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-22 15:18:45,042 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:18:45,043 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] [2021-11-22 15:18:45,044 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:18:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:18:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash -566801703, now seen corresponding path program 1 times [2021-11-22 15:18:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:18:45,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735393352] [2021-11-22 15:18:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:45,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:18:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:45,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:18:45,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735393352] [2021-11-22 15:18:45,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735393352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:18:45,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:18:45,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:18:45,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17896010] [2021-11-22 15:18:45,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:18:45,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:18:45,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:18:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:18:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:18:45,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2021-11-22 15:18:45,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:45,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:18:45,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2021-11-22 15:18:45,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:18:45,482 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2021-11-22 15:18:45,482 INFO L130 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2021-11-22 15:18:45,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 175 event pairs, 5 based on Foata normal form. 14/114 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2021-11-22 15:18:45,486 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2021-11-22 15:18:45,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2021-11-22 15:18:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:18:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-22 15:18:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2021-11-22 15:18:45,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2021-11-22 15:18:45,503 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2021-11-22 15:18:45,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2021-11-22 15:18:45,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:18:45,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2021-11-22 15:18:45,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:45,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:45,518 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:45,520 INFO L186 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2021-11-22 15:18:45,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2021-11-22 15:18:45,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-22 15:18:45,539 INFO L242 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2021-11-22 15:18:45,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2021-11-22 15:18:45,546 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2021-11-22 15:18:45,546 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2021-11-22 15:18:45,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:45,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:18:45,547 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] [2021-11-22 15:18:45,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:18:45,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:18:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:18:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash 693036951, now seen corresponding path program 1 times [2021-11-22 15:18:45,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:18:45,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270745788] [2021-11-22 15:18:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:45,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:18:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:46,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:18:46,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270745788] [2021-11-22 15:18:46,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270745788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:18:46,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:18:46,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:18:46,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719485085] [2021-11-22 15:18:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:18:46,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:18:46,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:18:46,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:18:46,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:18:46,117 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2021-11-22 15:18:46,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:46,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:18:46,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2021-11-22 15:18:46,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:18:46,483 INFO L129 PetriNetUnfolder]: 48/176 cut-off events. [2021-11-22 15:18:46,484 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-11-22 15:18:46,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 176 events. 48/176 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 503 event pairs, 5 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 295. Up to 72 conditions per place. [2021-11-22 15:18:46,492 INFO L132 encePairwiseOnDemand]: 80/88 looper letters, 36 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2021-11-22 15:18:46,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 271 flow [2021-11-22 15:18:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:18:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-22 15:18:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 424 transitions. [2021-11-22 15:18:46,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6883116883116883 [2021-11-22 15:18:46,506 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 424 transitions. [2021-11-22 15:18:46,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 424 transitions. [2021-11-22 15:18:46,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:18:46,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 424 transitions. [2021-11-22 15:18:46,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.57142857142857) internal successors, (424), 7 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:46,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:46,522 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:46,523 INFO L186 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 7 states and 424 transitions. [2021-11-22 15:18:46,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 271 flow [2021-11-22 15:18:46,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-22 15:18:46,530 INFO L242 Difference]: Finished difference. Result has 82 places, 76 transitions, 195 flow [2021-11-22 15:18:46,530 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=195, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2021-11-22 15:18:46,532 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2021-11-22 15:18:46,533 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 195 flow [2021-11-22 15:18:46,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:46,534 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:18:46,534 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:18:46,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:18:46,535 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:18:46,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:18:46,537 INFO L85 PathProgramCache]: Analyzing trace with hash -248035196, now seen corresponding path program 1 times [2021-11-22 15:18:46,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:18:46,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190863588] [2021-11-22 15:18:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:46,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:18:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:46,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:18:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190863588] [2021-11-22 15:18:46,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190863588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:18:46,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475291867] [2021-11-22 15:18:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:46,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:18:46,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:18:46,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:18:46,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:18:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:47,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 15:18:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:18:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:48,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:18:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475291867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:18:48,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:18:48,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 19 [2021-11-22 15:18:48,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405746084] [2021-11-22 15:18:48,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:18:48,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 15:18:49,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:18:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 15:18:49,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:18:49,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2021-11-22 15:18:49,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 195 flow. Second operand has 19 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:49,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:18:49,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2021-11-22 15:18:49,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:18:49,899 INFO L129 PetriNetUnfolder]: 93/323 cut-off events. [2021-11-22 15:18:49,900 INFO L130 PetriNetUnfolder]: For 118/121 co-relation queries the response was YES. [2021-11-22 15:18:49,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 323 events. 93/323 cut-off events. For 118/121 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1273 event pairs, 8 based on Foata normal form. 16/321 useless extension candidates. Maximal degree in co-relation 674. Up to 53 conditions per place. [2021-11-22 15:18:49,909 INFO L132 encePairwiseOnDemand]: 76/88 looper letters, 54 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2021-11-22 15:18:49,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 564 flow [2021-11-22 15:18:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 15:18:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-22 15:18:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1118 transitions. [2021-11-22 15:18:49,916 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6686602870813397 [2021-11-22 15:18:49,916 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1118 transitions. [2021-11-22 15:18:49,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1118 transitions. [2021-11-22 15:18:49,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:18:49,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1118 transitions. [2021-11-22 15:18:49,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:49,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 88.0) internal successors, (1760), 20 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:49,930 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 88.0) internal successors, (1760), 20 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:49,930 INFO L186 Difference]: Start difference. First operand has 82 places, 76 transitions, 195 flow. Second operand 19 states and 1118 transitions. [2021-11-22 15:18:49,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 564 flow [2021-11-22 15:18:49,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 553 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-11-22 15:18:49,939 INFO L242 Difference]: Finished difference. Result has 107 places, 110 transitions, 478 flow [2021-11-22 15:18:49,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=478, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2021-11-22 15:18:49,940 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 29 predicate places. [2021-11-22 15:18:49,941 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 478 flow [2021-11-22 15:18:49,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:49,942 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:18:49,942 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] [2021-11-22 15:18:49,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:18:50,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:18:50,158 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:18:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:18:50,159 INFO L85 PathProgramCache]: Analyzing trace with hash -6394160, now seen corresponding path program 1 times [2021-11-22 15:18:50,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:18:50,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510610550] [2021-11-22 15:18:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:50,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:18:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:51,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:18:51,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510610550] [2021-11-22 15:18:51,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510610550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:18:51,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455136589] [2021-11-22 15:18:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:51,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:18:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:18:51,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:18:51,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:18:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:51,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 15:18:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:18:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:52,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:18:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:54,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455136589] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 15:18:54,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:18:54,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2021-11-22 15:18:54,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779307955] [2021-11-22 15:18:54,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:18:54,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 15:18:54,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:18:54,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 15:18:54,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-11-22 15:18:54,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-11-22 15:18:54,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 478 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:54,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:18:54,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-11-22 15:18:54,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:18:57,270 INFO L129 PetriNetUnfolder]: 314/950 cut-off events. [2021-11-22 15:18:57,270 INFO L130 PetriNetUnfolder]: For 1542/1542 co-relation queries the response was YES. [2021-11-22 15:18:57,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 950 events. 314/950 cut-off events. For 1542/1542 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5767 event pairs, 36 based on Foata normal form. 2/880 useless extension candidates. Maximal degree in co-relation 2727. Up to 156 conditions per place. [2021-11-22 15:18:57,286 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 122 selfloop transitions, 103 changer transitions 18/282 dead transitions. [2021-11-22 15:18:57,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 282 transitions, 1896 flow [2021-11-22 15:18:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 15:18:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-22 15:18:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1525 transitions. [2021-11-22 15:18:57,328 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6189123376623377 [2021-11-22 15:18:57,328 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1525 transitions. [2021-11-22 15:18:57,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1525 transitions. [2021-11-22 15:18:57,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:18:57,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1525 transitions. [2021-11-22 15:18:57,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.464285714285715) internal successors, (1525), 28 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:57,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:57,345 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:57,345 INFO L186 Difference]: Start difference. First operand has 107 places, 110 transitions, 478 flow. Second operand 28 states and 1525 transitions. [2021-11-22 15:18:57,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 282 transitions, 1896 flow [2021-11-22 15:18:57,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 282 transitions, 1787 flow, removed 48 selfloop flow, removed 5 redundant places. [2021-11-22 15:18:57,373 INFO L242 Difference]: Finished difference. Result has 140 places, 193 transitions, 1333 flow [2021-11-22 15:18:57,374 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1333, PETRI_PLACES=140, PETRI_TRANSITIONS=193} [2021-11-22 15:18:57,375 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 62 predicate places. [2021-11-22 15:18:57,375 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 193 transitions, 1333 flow [2021-11-22 15:18:57,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:18:57,376 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:18:57,377 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] [2021-11-22 15:18:57,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:18:57,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:18:57,593 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:18:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:18:57,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700883, now seen corresponding path program 1 times [2021-11-22 15:18:57,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:18:57,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611073650] [2021-11-22 15:18:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:57,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:18:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:18:58,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:18:58,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611073650] [2021-11-22 15:18:58,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611073650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:18:58,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640647847] [2021-11-22 15:18:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:18:58,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:18:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:18:58,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:18:58,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:18:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:18:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:18:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:19:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:00,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:19:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:04,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640647847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:19:04,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:19:04,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 37 [2021-11-22 15:19:04,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765346620] [2021-11-22 15:19:04,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:19:04,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 15:19:04,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 15:19:04,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 15:19:04,160 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-11-22 15:19:04,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 193 transitions, 1333 flow. Second operand has 37 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:04,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:19:04,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-11-22 15:19:04,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:19:23,049 INFO L129 PetriNetUnfolder]: 583/2036 cut-off events. [2021-11-22 15:19:23,050 INFO L130 PetriNetUnfolder]: For 6761/6798 co-relation queries the response was YES. [2021-11-22 15:19:23,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7005 conditions, 2036 events. 583/2036 cut-off events. For 6761/6798 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16697 event pairs, 17 based on Foata normal form. 35/2063 useless extension candidates. Maximal degree in co-relation 6977. Up to 288 conditions per place. [2021-11-22 15:19:23,078 INFO L132 encePairwiseOnDemand]: 70/88 looper letters, 265 selfloop transitions, 260 changer transitions 124/697 dead transitions. [2021-11-22 15:19:23,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 697 transitions, 6382 flow [2021-11-22 15:19:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-22 15:19:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-11-22 15:19:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 5506 transitions. [2021-11-22 15:19:23,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6256818181818182 [2021-11-22 15:19:23,102 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 5506 transitions. [2021-11-22 15:19:23,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 5506 transitions. [2021-11-22 15:19:23,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:19:23,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 5506 transitions. [2021-11-22 15:19:23,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 55.06) internal successors, (5506), 100 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:23,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 88.0) internal successors, (8888), 101 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:23,153 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 88.0) internal successors, (8888), 101 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:23,154 INFO L186 Difference]: Start difference. First operand has 140 places, 193 transitions, 1333 flow. Second operand 100 states and 5506 transitions. [2021-11-22 15:19:23,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 697 transitions, 6382 flow [2021-11-22 15:19:23,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 697 transitions, 5778 flow, removed 296 selfloop flow, removed 9 redundant places. [2021-11-22 15:19:23,227 INFO L242 Difference]: Finished difference. Result has 284 places, 398 transitions, 4045 flow [2021-11-22 15:19:23,228 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=4045, PETRI_PLACES=284, PETRI_TRANSITIONS=398} [2021-11-22 15:19:23,229 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 206 predicate places. [2021-11-22 15:19:23,229 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 398 transitions, 4045 flow [2021-11-22 15:19:23,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:23,230 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:19:23,231 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:23,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:19:23,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:19:23,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:19:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1966106357, now seen corresponding path program 2 times [2021-11-22 15:19:23,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:23,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494732802] [2021-11-22 15:19:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:23,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:23,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:23,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494732802] [2021-11-22 15:19:23,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494732802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:23,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:23,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:19:23,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969367957] [2021-11-22 15:19:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:23,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:19:23,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:19:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:19:23,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2021-11-22 15:19:23,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 398 transitions, 4045 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:23,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:19:23,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2021-11-22 15:19:23,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:19:24,615 INFO L129 PetriNetUnfolder]: 1024/2574 cut-off events. [2021-11-22 15:19:24,615 INFO L130 PetriNetUnfolder]: For 17017/17017 co-relation queries the response was YES. [2021-11-22 15:19:24,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12102 conditions, 2574 events. 1024/2574 cut-off events. For 17017/17017 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19110 event pairs, 22 based on Foata normal form. 32/2597 useless extension candidates. Maximal degree in co-relation 12020. Up to 518 conditions per place. [2021-11-22 15:19:24,671 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 692 selfloop transitions, 194 changer transitions 0/938 dead transitions. [2021-11-22 15:19:24,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 938 transitions, 11941 flow [2021-11-22 15:19:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:19:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-22 15:19:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2021-11-22 15:19:24,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2021-11-22 15:19:24,674 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2021-11-22 15:19:24,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2021-11-22 15:19:24,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:19:24,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2021-11-22 15:19:24,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:24,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:24,678 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:24,678 INFO L186 Difference]: Start difference. First operand has 284 places, 398 transitions, 4045 flow. Second operand 7 states and 496 transitions. [2021-11-22 15:19:24,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 938 transitions, 11941 flow [2021-11-22 15:19:24,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 938 transitions, 10924 flow, removed 444 selfloop flow, removed 53 redundant places. [2021-11-22 15:19:24,851 INFO L242 Difference]: Finished difference. Result has 194 places, 520 transitions, 5708 flow [2021-11-22 15:19:24,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5708, PETRI_PLACES=194, PETRI_TRANSITIONS=520} [2021-11-22 15:19:24,853 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 116 predicate places. [2021-11-22 15:19:24,853 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 520 transitions, 5708 flow [2021-11-22 15:19:24,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:24,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:19:24,854 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:24,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:19:24,855 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:19:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:24,855 INFO L85 PathProgramCache]: Analyzing trace with hash -137336448, now seen corresponding path program 2 times [2021-11-22 15:19:24,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:24,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732305424] [2021-11-22 15:19:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:24,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:26,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:26,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732305424] [2021-11-22 15:19:26,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732305424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:19:26,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504229546] [2021-11-22 15:19:26,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:19:26,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:19:26,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:19:26,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:19:26,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:19:26,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:19:26,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:19:26,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 15:19:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:19:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:27,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:19:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:31,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504229546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:19:31,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:19:31,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 35 [2021-11-22 15:19:31,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431474530] [2021-11-22 15:19:31,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:19:31,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-22 15:19:31,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:31,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-22 15:19:31,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 15:19:31,074 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-11-22 15:19:31,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 520 transitions, 5708 flow. Second operand has 35 states, 35 states have (on average 53.22857142857143) internal successors, (1863), 35 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:31,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:19:31,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-11-22 15:19:31,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:19:49,889 INFO L129 PetriNetUnfolder]: 1368/3746 cut-off events. [2021-11-22 15:19:49,889 INFO L130 PetriNetUnfolder]: For 20368/20407 co-relation queries the response was YES. [2021-11-22 15:19:49,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17763 conditions, 3746 events. 1368/3746 cut-off events. For 20368/20407 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31589 event pairs, 25 based on Foata normal form. 32/3768 useless extension candidates. Maximal degree in co-relation 17719. Up to 899 conditions per place. [2021-11-22 15:19:49,969 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 502 selfloop transitions, 472 changer transitions 61/1084 dead transitions. [2021-11-22 15:19:49,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1084 transitions, 13598 flow [2021-11-22 15:19:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-22 15:19:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-11-22 15:19:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4447 transitions. [2021-11-22 15:19:49,980 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6238776655443322 [2021-11-22 15:19:49,980 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4447 transitions. [2021-11-22 15:19:49,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4447 transitions. [2021-11-22 15:19:49,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:19:49,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4447 transitions. [2021-11-22 15:19:49,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 54.901234567901234) internal successors, (4447), 81 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:50,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 88.0) internal successors, (7216), 82 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:50,012 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 88.0) internal successors, (7216), 82 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:50,012 INFO L186 Difference]: Start difference. First operand has 194 places, 520 transitions, 5708 flow. Second operand 81 states and 4447 transitions. [2021-11-22 15:19:50,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1084 transitions, 13598 flow [2021-11-22 15:19:50,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1084 transitions, 13532 flow, removed 33 selfloop flow, removed 0 redundant places. [2021-11-22 15:19:50,241 INFO L242 Difference]: Finished difference. Result has 313 places, 819 transitions, 11261 flow [2021-11-22 15:19:50,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=11261, PETRI_PLACES=313, PETRI_TRANSITIONS=819} [2021-11-22 15:19:50,243 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 235 predicate places. [2021-11-22 15:19:50,243 INFO L470 AbstractCegarLoop]: Abstraction has has 313 places, 819 transitions, 11261 flow [2021-11-22 15:19:50,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.22857142857143) internal successors, (1863), 35 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:50,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:19:50,244 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:50,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:19:50,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:19:50,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:19:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:50,445 INFO L85 PathProgramCache]: Analyzing trace with hash 304396636, now seen corresponding path program 3 times [2021-11-22 15:19:50,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:50,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430978117] [2021-11-22 15:19:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:50,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:51,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:51,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430978117] [2021-11-22 15:19:51,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430978117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:19:51,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656652555] [2021-11-22 15:19:51,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:19:51,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:19:51,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:19:51,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:19:51,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:19:51,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 15:19:51,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:19:51,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 15:19:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:19:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:53,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:19:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:59,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656652555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:19:59,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:19:59,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2021-11-22 15:19:59,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340638039] [2021-11-22 15:19:59,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:19:59,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-22 15:19:59,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-22 15:19:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 15:19:59,811 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-11-22 15:19:59,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 819 transitions, 11261 flow. Second operand has 39 states, 39 states have (on average 51.256410256410255) internal successors, (1999), 39 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:19:59,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:19:59,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-11-22 15:19:59,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:20:13,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:20:16,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:20:58,955 INFO L129 PetriNetUnfolder]: 2070/5331 cut-off events. [2021-11-22 15:20:58,955 INFO L130 PetriNetUnfolder]: For 44362/44362 co-relation queries the response was YES. [2021-11-22 15:20:59,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30158 conditions, 5331 events. 2070/5331 cut-off events. For 44362/44362 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 46546 event pairs, 88 based on Foata normal form. 9/5332 useless extension candidates. Maximal degree in co-relation 30075. Up to 1682 conditions per place. [2021-11-22 15:20:59,057 INFO L132 encePairwiseOnDemand]: 67/88 looper letters, 711 selfloop transitions, 598 changer transitions 81/1429 dead transitions. [2021-11-22 15:20:59,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1429 transitions, 21473 flow [2021-11-22 15:20:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-22 15:20:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-11-22 15:20:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4667 transitions. [2021-11-22 15:20:59,068 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6026601239669421 [2021-11-22 15:20:59,068 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4667 transitions. [2021-11-22 15:20:59,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4667 transitions. [2021-11-22 15:20:59,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:20:59,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4667 transitions. [2021-11-22 15:20:59,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 53.03409090909091) internal successors, (4667), 88 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:20:59,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 88.0) internal successors, (7832), 89 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:20:59,099 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 88.0) internal successors, (7832), 89 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:20:59,099 INFO L186 Difference]: Start difference. First operand has 313 places, 819 transitions, 11261 flow. Second operand 88 states and 4667 transitions. [2021-11-22 15:20:59,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1429 transitions, 21473 flow [2021-11-22 15:20:59,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1429 transitions, 20738 flow, removed 332 selfloop flow, removed 32 redundant places. [2021-11-22 15:20:59,865 INFO L242 Difference]: Finished difference. Result has 396 places, 1091 transitions, 16918 flow [2021-11-22 15:20:59,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=10770, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=16918, PETRI_PLACES=396, PETRI_TRANSITIONS=1091} [2021-11-22 15:20:59,869 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 318 predicate places. [2021-11-22 15:20:59,869 INFO L470 AbstractCegarLoop]: Abstraction has has 396 places, 1091 transitions, 16918 flow [2021-11-22 15:20:59,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 51.256410256410255) internal successors, (1999), 39 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:20:59,871 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:20:59,871 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:20:59,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:21:00,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:21:00,077 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:21:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:21:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash 553653098, now seen corresponding path program 3 times [2021-11-22 15:21:00,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:21:00,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545836898] [2021-11-22 15:21:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:21:00,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:21:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:21:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:21:00,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:21:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545836898] [2021-11-22 15:21:00,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545836898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:21:00,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898849] [2021-11-22 15:21:00,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:21:00,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:21:00,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:21:00,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:21:00,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:21:01,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 15:21:01,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:21:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-22 15:21:01,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:21:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:21:02,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:21:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:21:03,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:21:03,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:21:03,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 18] total 41 [2021-11-22 15:21:03,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81827090] [2021-11-22 15:21:03,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:21:03,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-22 15:21:03,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:21:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-22 15:21:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2021-11-22 15:21:03,753 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-11-22 15:21:03,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1091 transitions, 16918 flow. Second operand has 41 states, 41 states have (on average 51.21951219512195) internal successors, (2100), 41 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:21:03,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:21:03,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-11-22 15:21:03,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:21:46,763 INFO L129 PetriNetUnfolder]: 2957/7531 cut-off events. [2021-11-22 15:21:46,764 INFO L130 PetriNetUnfolder]: For 107456/107456 co-relation queries the response was YES. [2021-11-22 15:21:46,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50346 conditions, 7531 events. 2957/7531 cut-off events. For 107456/107456 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 69287 event pairs, 79 based on Foata normal form. 14/7534 useless extension candidates. Maximal degree in co-relation 50232. Up to 1511 conditions per place. [2021-11-22 15:21:46,976 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 581 selfloop transitions, 1335 changer transitions 93/2048 dead transitions. [2021-11-22 15:21:46,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 2048 transitions, 35592 flow [2021-11-22 15:21:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-22 15:21:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-11-22 15:21:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 6587 transitions. [2021-11-22 15:21:46,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5988181818181818 [2021-11-22 15:21:46,991 INFO L72 ComplementDD]: Start complementDD. Operand 125 states and 6587 transitions. [2021-11-22 15:21:46,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 6587 transitions. [2021-11-22 15:21:46,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:21:46,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 125 states and 6587 transitions. [2021-11-22 15:21:47,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 126 states, 125 states have (on average 52.696) internal successors, (6587), 125 states have internal predecessors, (6587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:21:47,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 126 states, 126 states have (on average 88.0) internal successors, (11088), 126 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:21:47,033 INFO L81 ComplementDD]: Finished complementDD. Result has 126 states, 126 states have (on average 88.0) internal successors, (11088), 126 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:21:47,034 INFO L186 Difference]: Start difference. First operand has 396 places, 1091 transitions, 16918 flow. Second operand 125 states and 6587 transitions. [2021-11-22 15:21:47,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 2048 transitions, 35592 flow [2021-11-22 15:21:48,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2048 transitions, 34119 flow, removed 442 selfloop flow, removed 45 redundant places. [2021-11-22 15:21:48,582 INFO L242 Difference]: Finished difference. Result has 525 places, 1652 transitions, 30254 flow [2021-11-22 15:21:48,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=16014, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=809, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=30254, PETRI_PLACES=525, PETRI_TRANSITIONS=1652} [2021-11-22 15:21:48,585 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 447 predicate places. [2021-11-22 15:21:48,585 INFO L470 AbstractCegarLoop]: Abstraction has has 525 places, 1652 transitions, 30254 flow [2021-11-22 15:21:48,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 51.21951219512195) internal successors, (2100), 41 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:21:48,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:21:48,587 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:21:48,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:21:48,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:21:48,789 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:21:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:21:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash 25916205, now seen corresponding path program 4 times [2021-11-22 15:21:48,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:21:48,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025733165] [2021-11-22 15:21:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:21:48,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:21:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:21:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:21:50,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:21:50,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025733165] [2021-11-22 15:21:50,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025733165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:21:50,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642824485] [2021-11-22 15:21:50,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:21:50,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:21:50,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:21:50,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:21:50,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:21:50,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:21:50,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:21:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-22 15:21:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:21:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:21:52,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:22:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:01,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642824485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:22:01,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:22:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 39 [2021-11-22 15:22:01,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076090277] [2021-11-22 15:22:01,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:22:01,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-22 15:22:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-22 15:22:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 15:22:01,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-11-22 15:22:01,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1652 transitions, 30254 flow. Second operand has 39 states, 39 states have (on average 53.256410256410255) internal successors, (2077), 39 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:22:01,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:22:01,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-11-22 15:22:01,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:23:18,635 INFO L129 PetriNetUnfolder]: 3026/8304 cut-off events. [2021-11-22 15:23:18,635 INFO L130 PetriNetUnfolder]: For 231643/231771 co-relation queries the response was YES. [2021-11-22 15:23:18,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73295 conditions, 8304 events. 3026/8304 cut-off events. For 231643/231771 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 81415 event pairs, 47 based on Foata normal form. 73/8371 useless extension candidates. Maximal degree in co-relation 73131. Up to 2367 conditions per place. [2021-11-22 15:23:18,936 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 1114 selfloop transitions, 936 changer transitions 93/2307 dead transitions. [2021-11-22 15:23:18,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 2307 transitions, 47105 flow [2021-11-22 15:23:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-22 15:23:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-11-22 15:23:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 4928 transitions. [2021-11-22 15:23:18,945 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2021-11-22 15:23:18,946 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 4928 transitions. [2021-11-22 15:23:18,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 4928 transitions. [2021-11-22 15:23:18,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:23:18,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 4928 transitions. [2021-11-22 15:23:18,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 54.75555555555555) internal successors, (4928), 90 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,974 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:18,974 INFO L186 Difference]: Start difference. First operand has 525 places, 1652 transitions, 30254 flow. Second operand 90 states and 4928 transitions. [2021-11-22 15:23:18,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 2307 transitions, 47105 flow [2021-11-22 15:23:22,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 2307 transitions, 43689 flow, removed 1344 selfloop flow, removed 42 redundant places. [2021-11-22 15:23:22,501 INFO L242 Difference]: Finished difference. Result has 599 places, 1990 transitions, 38446 flow [2021-11-22 15:23:22,504 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=28133, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=641, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=895, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=38446, PETRI_PLACES=599, PETRI_TRANSITIONS=1990} [2021-11-22 15:23:22,505 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 521 predicate places. [2021-11-22 15:23:22,506 INFO L470 AbstractCegarLoop]: Abstraction has has 599 places, 1990 transitions, 38446 flow [2021-11-22 15:23:22,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 53.256410256410255) internal successors, (2077), 39 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:22,507 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:23:22,507 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:22,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-22 15:23:22,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 15:23:22,725 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:23:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:22,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1889315571, now seen corresponding path program 5 times [2021-11-22 15:23:22,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:22,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850327025] [2021-11-22 15:23:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:22,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:24,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:24,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850327025] [2021-11-22 15:23:24,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850327025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:23:24,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609334983] [2021-11-22 15:23:24,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:23:24,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:23:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:23:24,411 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:23:24,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa34dc0-476a-47ac-a11f-88041852da92/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:23:24,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 15:23:24,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:23:24,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 15:23:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:26,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:33,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609334983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:23:33,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:23:33,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 22] total 51 [2021-11-22 15:23:33,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113625447] [2021-11-22 15:23:33,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:23:33,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-22 15:23:33,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-22 15:23:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2021-11-22 15:23:33,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-11-22 15:23:33,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1990 transitions, 38446 flow. Second operand has 51 states, 51 states have (on average 50.90196078431372) internal successors, (2596), 51 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:33,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:23:33,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-11-22 15:23:33,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:23:48,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:24:34,678 WARN L227 SmtUtils]: Spent 13.30s on a formula simplification. DAG size of input: 143 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:26:09,103 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 161 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:26:39,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:27:11,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:27:13,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:29:58,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:29:59,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []