./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem10_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem10_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3 --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 fe7c72dc6c69dc89ca79e813e8198cc29c1edb75 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:25:48,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:25:48,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:25:48,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:25:48,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:25:48,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:25:48,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:25:48,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:25:48,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:25:48,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:25:48,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:25:48,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:25:48,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:25:48,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:25:48,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:25:48,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:25:48,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:25:48,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:25:48,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:25:48,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:25:48,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:25:48,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:25:48,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:25:48,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:25:48,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:25:48,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:25:48,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:25:48,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:25:48,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:25:48,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:25:48,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:25:48,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:25:48,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:25:48,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:25:48,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:25:48,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:25:48,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:25:48,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:25:48,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:25:48,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:25:48,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:25:48,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:25:48,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:25:48,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:25:48,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:25:48,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:25:48,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:25:48,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:25:48,283 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:25:48,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:25:48,283 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:25:48,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:25:48,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:25:48,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:25:48,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:25:48,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:25:48,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:25:48,285 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:25:48,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:25:48,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:25:48,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:25:48,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:25:48,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:25:48,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:25:48,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:25:48,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:25:48,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:25:48,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:25:48,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:25:48,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:25:48,288 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:25:48,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:25:48,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:25:48,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:25:48,290 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_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7c72dc6c69dc89ca79e813e8198cc29c1edb75 [2021-10-15 20:25:48,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:25:48,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:25:48,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:25:48,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:25:48,578 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:25:48,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem10_label54.c [2021-10-15 20:25:48,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/data/3b83f4445/5126d701e62d470797ff6a13eb8c5142/FLAG07494ba8a [2021-10-15 20:25:49,339 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:25:49,340 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/sv-benchmarks/c/eca-rers2012/Problem10_label54.c [2021-10-15 20:25:49,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/data/3b83f4445/5126d701e62d470797ff6a13eb8c5142/FLAG07494ba8a [2021-10-15 20:25:49,580 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/data/3b83f4445/5126d701e62d470797ff6a13eb8c5142 [2021-10-15 20:25:49,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:25:49,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:25:49,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:25:49,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:25:49,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:25:49,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:25:49" (1/1) ... [2021-10-15 20:25:49,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:49, skipping insertion in model container [2021-10-15 20:25:49,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:25:49" (1/1) ... [2021-10-15 20:25:49,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:25:49,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:25:49,885 WARN L228 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_467774b3-bb3b-407b-adcb-74cbe11ac8ee/sv-benchmarks/c/eca-rers2012/Problem10_label54.c[7067,7080] [2021-10-15 20:25:50,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:25:50,079 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:25:50,120 WARN L228 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_467774b3-bb3b-407b-adcb-74cbe11ac8ee/sv-benchmarks/c/eca-rers2012/Problem10_label54.c[7067,7080] [2021-10-15 20:25:50,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:25:50,225 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:25:50,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50 WrapperNode [2021-10-15 20:25:50,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:25:50,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:25:50,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:25:50,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:25:50,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:25:50,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:25:50,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:25:50,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:25:50,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:25:50,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:25:50,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:25:50,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:25:50,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (1/1) ... [2021-10-15 20:25:50,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:25:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:50,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:25:50,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:25:50,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:25:50,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:25:50,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:25:50,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:25:51,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:25:51,888 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:25:51,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:51 BoogieIcfgContainer [2021-10-15 20:25:51,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:25:51,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:25:51,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:25:51,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:25:51,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:25:49" (1/3) ... [2021-10-15 20:25:51,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d1eed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:25:51, skipping insertion in model container [2021-10-15 20:25:51,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:50" (2/3) ... [2021-10-15 20:25:51,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d1eed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:25:51, skipping insertion in model container [2021-10-15 20:25:51,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:51" (3/3) ... [2021-10-15 20:25:51,902 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label54.c [2021-10-15 20:25:51,909 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:25:51,909 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:25:51,961 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:25:51,968 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, mConcurrency=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 [2021-10-15 20:25:51,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:25:51,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 20:25:52,086 INFO L129 PetriNetUnfolder]: 139/344 cut-off events. [2021-10-15 20:25:52,092 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:52,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 344 events. 139/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 210 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-10-15 20:25:52,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 20:25:52,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 339 transitions, 678 flow [2021-10-15 20:25:52,161 INFO L129 PetriNetUnfolder]: 57/175 cut-off events. [2021-10-15 20:25:52,174 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:52,174 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:52,175 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:52,176 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2021-10-15 20:25:52,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:52,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707005888] [2021-10-15 20:25:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:52,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:52,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:52,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707005888] [2021-10-15 20:25:52,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707005888] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:52,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:52,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:25:52,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017919810] [2021-10-15 20:25:52,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:52,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:52,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:25:52,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 339 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:52,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:25:52,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:53,806 INFO L129 PetriNetUnfolder]: 109/450 cut-off events. [2021-10-15 20:25:53,807 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:53,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 450 events. 109/450 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 482 event pairs, 0 based on Foata normal form. 61/342 useless extension candidates. Maximal degree in co-relation 1. Up to 261 conditions per place. [2021-10-15 20:25:53,818 INFO L132 encePairwiseOnDemand]: 146/344 looper letters, 339 selfloop transitions, 30 changer transitions 73/447 dead transitions. [2021-10-15 20:25:53,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 447 transitions, 1778 flow [2021-10-15 20:25:53,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2021-10-15 20:25:53,846 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2021-10-15 20:25:53,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2021-10-15 20:25:53,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2021-10-15 20:25:53,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:53,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2021-10-15 20:25:53,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,880 INFO L186 Difference]: Start difference. First operand has 203 places, 339 transitions, 678 flow. Second operand 3 states and 630 transitions. [2021-10-15 20:25:53,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 447 transitions, 1778 flow [2021-10-15 20:25:53,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 447 transitions, 1778 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:53,908 INFO L242 Difference]: Finished difference. Result has 207 places, 238 transitions, 730 flow [2021-10-15 20:25:53,911 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=730, PETRI_PLACES=207, PETRI_TRANSITIONS=238} [2021-10-15 20:25:53,912 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, 4 predicate places. [2021-10-15 20:25:53,913 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 238 transitions, 730 flow [2021-10-15 20:25:53,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:53,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:53,915 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:53,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:25:53,916 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash 458107734, now seen corresponding path program 1 times [2021-10-15 20:25:53,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:53,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604606690] [2021-10-15 20:25:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:53,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:54,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:54,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604606690] [2021-10-15 20:25:54,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604606690] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:54,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:54,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:54,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132656577] [2021-10-15 20:25:54,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:54,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:54,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:54,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:54,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:25:54,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 238 transitions, 730 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:54,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:25:54,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:54,930 INFO L129 PetriNetUnfolder]: 106/526 cut-off events. [2021-10-15 20:25:54,930 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2021-10-15 20:25:54,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 526 events. 106/526 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 665 event pairs, 0 based on Foata normal form. 66/592 useless extension candidates. Maximal degree in co-relation 462. Up to 349 conditions per place. [2021-10-15 20:25:54,936 INFO L132 encePairwiseOnDemand]: 268/344 looper letters, 350 selfloop transitions, 29 changer transitions 0/384 dead transitions. [2021-10-15 20:25:54,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 384 transitions, 1808 flow [2021-10-15 20:25:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-10-15 20:25:54,941 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43507751937984496 [2021-10-15 20:25:54,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-10-15 20:25:54,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-10-15 20:25:54,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:54,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-10-15 20:25:54,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,950 INFO L186 Difference]: Start difference. First operand has 207 places, 238 transitions, 730 flow. Second operand 3 states and 449 transitions. [2021-10-15 20:25:54,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 384 transitions, 1808 flow [2021-10-15 20:25:54,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 384 transitions, 1740 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:54,973 INFO L242 Difference]: Finished difference. Result has 149 places, 248 transitions, 952 flow [2021-10-15 20:25:54,974 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=952, PETRI_PLACES=149, PETRI_TRANSITIONS=248} [2021-10-15 20:25:54,975 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -54 predicate places. [2021-10-15 20:25:54,975 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 248 transitions, 952 flow [2021-10-15 20:25:54,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,976 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:54,976 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:54,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:25:54,977 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:54,978 INFO L82 PathProgramCache]: Analyzing trace with hash 417689321, now seen corresponding path program 1 times [2021-10-15 20:25:54,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:54,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319786291] [2021-10-15 20:25:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:54,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:55,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:55,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319786291] [2021-10-15 20:25:55,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319786291] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:55,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:55,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:25:55,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585398083] [2021-10-15 20:25:55,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:55,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:55,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:55,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:55,154 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:25:55,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 248 transitions, 952 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:55,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:55,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:25:55,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:55,968 INFO L129 PetriNetUnfolder]: 116/675 cut-off events. [2021-10-15 20:25:55,969 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2021-10-15 20:25:55,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 675 events. 116/675 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1263 event pairs, 0 based on Foata normal form. 10/685 useless extension candidates. Maximal degree in co-relation 1127. Up to 525 conditions per place. [2021-10-15 20:25:55,974 INFO L132 encePairwiseOnDemand]: 323/344 looper letters, 378 selfloop transitions, 11 changer transitions 0/394 dead transitions. [2021-10-15 20:25:55,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 394 transitions, 2046 flow [2021-10-15 20:25:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2021-10-15 20:25:55,977 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2021-10-15 20:25:55,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2021-10-15 20:25:55,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2021-10-15 20:25:55,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:55,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2021-10-15 20:25:55,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:55,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:55,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:55,984 INFO L186 Difference]: Start difference. First operand has 149 places, 248 transitions, 952 flow. Second operand 3 states and 393 transitions. [2021-10-15 20:25:55,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 394 transitions, 2046 flow [2021-10-15 20:25:55,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 394 transitions, 1974 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:56,005 INFO L242 Difference]: Finished difference. Result has 150 places, 258 transitions, 997 flow [2021-10-15 20:25:56,006 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=997, PETRI_PLACES=150, PETRI_TRANSITIONS=258} [2021-10-15 20:25:56,006 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -53 predicate places. [2021-10-15 20:25:56,006 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 258 transitions, 997 flow [2021-10-15 20:25:56,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:56,007 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:56,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:25:56,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash -779134940, now seen corresponding path program 1 times [2021-10-15 20:25:56,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:56,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137617088] [2021-10-15 20:25:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:56,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:56,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:56,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137617088] [2021-10-15 20:25:56,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137617088] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:56,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:56,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:25:56,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550213904] [2021-10-15 20:25:56,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:25:56,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:25:56,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:25:56,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:25:56,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 258 transitions, 997 flow. Second operand has 7 states, 7 states have (on average 26.571428571428573) internal successors, (186), 7 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:56,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:25:56,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:57,160 INFO L129 PetriNetUnfolder]: 115/729 cut-off events. [2021-10-15 20:25:57,161 INFO L130 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2021-10-15 20:25:57,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1692 conditions, 729 events. 115/729 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1533 event pairs, 0 based on Foata normal form. 1/730 useless extension candidates. Maximal degree in co-relation 1036. Up to 658 conditions per place. [2021-10-15 20:25:57,166 INFO L132 encePairwiseOnDemand]: 338/344 looper letters, 249 selfloop transitions, 1 changer transitions 54/309 dead transitions. [2021-10-15 20:25:57,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 309 transitions, 1707 flow [2021-10-15 20:25:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:25:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:25:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 321 transitions. [2021-10-15 20:25:57,170 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.13330564784053156 [2021-10-15 20:25:57,170 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 321 transitions. [2021-10-15 20:25:57,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 321 transitions. [2021-10-15 20:25:57,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:57,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 321 transitions. [2021-10-15 20:25:57,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.857142857142854) internal successors, (321), 7 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:57,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:57,182 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:57,183 INFO L186 Difference]: Start difference. First operand has 150 places, 258 transitions, 997 flow. Second operand 7 states and 321 transitions. [2021-10-15 20:25:57,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 309 transitions, 1707 flow [2021-10-15 20:25:57,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 309 transitions, 1688 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:57,202 INFO L242 Difference]: Finished difference. Result has 159 places, 255 transitions, 970 flow [2021-10-15 20:25:57,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=970, PETRI_PLACES=159, PETRI_TRANSITIONS=255} [2021-10-15 20:25:57,203 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -44 predicate places. [2021-10-15 20:25:57,204 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 255 transitions, 970 flow [2021-10-15 20:25:57,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.571428571428573) internal successors, (186), 7 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:57,204 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:57,205 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:57,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:25:57,205 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1413984764, now seen corresponding path program 1 times [2021-10-15 20:25:57,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:57,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067002016] [2021-10-15 20:25:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:57,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:57,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:57,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067002016] [2021-10-15 20:25:57,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067002016] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:57,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:57,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:25:57,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048977437] [2021-10-15 20:25:57,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:57,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:57,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:57,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:25:57,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 255 transitions, 970 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:57,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:57,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:25:57,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:58,306 INFO L129 PetriNetUnfolder]: 167/1004 cut-off events. [2021-10-15 20:25:58,307 INFO L130 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2021-10-15 20:25:58,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2360 conditions, 1004 events. 167/1004 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1912 event pairs, 0 based on Foata normal form. 40/1044 useless extension candidates. Maximal degree in co-relation 2345. Up to 693 conditions per place. [2021-10-15 20:25:58,315 INFO L132 encePairwiseOnDemand]: 268/344 looper letters, 354 selfloop transitions, 86 changer transitions 0/445 dead transitions. [2021-10-15 20:25:58,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 445 transitions, 2462 flow [2021-10-15 20:25:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2021-10-15 20:25:58,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2021-10-15 20:25:58,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2021-10-15 20:25:58,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2021-10-15 20:25:58,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:58,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2021-10-15 20:25:58,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,329 INFO L186 Difference]: Start difference. First operand has 159 places, 255 transitions, 970 flow. Second operand 3 states and 447 transitions. [2021-10-15 20:25:58,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 445 transitions, 2462 flow [2021-10-15 20:25:58,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 445 transitions, 2445 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-10-15 20:25:58,353 INFO L242 Difference]: Finished difference. Result has 154 places, 309 transitions, 1773 flow [2021-10-15 20:25:58,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1773, PETRI_PLACES=154, PETRI_TRANSITIONS=309} [2021-10-15 20:25:58,354 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -49 predicate places. [2021-10-15 20:25:58,354 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 309 transitions, 1773 flow [2021-10-15 20:25:58,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:58,355 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:58,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:25:58,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash -114636214, now seen corresponding path program 1 times [2021-10-15 20:25:58,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:58,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529198576] [2021-10-15 20:25:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:58,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:58,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:58,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529198576] [2021-10-15 20:25:58,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529198576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:58,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:58,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:58,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600041464] [2021-10-15 20:25:58,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:58,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:58,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:58,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:58,510 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:25:58,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 309 transitions, 1773 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:58,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:58,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:25:58,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:59,434 INFO L129 PetriNetUnfolder]: 142/1118 cut-off events. [2021-10-15 20:25:59,434 INFO L130 PetriNetUnfolder]: For 915/915 co-relation queries the response was YES. [2021-10-15 20:25:59,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 1118 events. 142/1118 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2665 event pairs, 0 based on Foata normal form. 75/1193 useless extension candidates. Maximal degree in co-relation 2677. Up to 785 conditions per place. [2021-10-15 20:25:59,442 INFO L132 encePairwiseOnDemand]: 276/344 looper letters, 364 selfloop transitions, 51 changer transitions 0/420 dead transitions. [2021-10-15 20:25:59,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 420 transitions, 2611 flow [2021-10-15 20:25:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2021-10-15 20:25:59,446 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2021-10-15 20:25:59,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2021-10-15 20:25:59,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2021-10-15 20:25:59,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:59,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2021-10-15 20:25:59,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,454 INFO L186 Difference]: Start difference. First operand has 154 places, 309 transitions, 1773 flow. Second operand 3 states and 432 transitions. [2021-10-15 20:25:59,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 420 transitions, 2611 flow [2021-10-15 20:25:59,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 420 transitions, 2413 flow, removed 45 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:59,474 INFO L242 Difference]: Finished difference. Result has 156 places, 284 transitions, 1601 flow [2021-10-15 20:25:59,475 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1601, PETRI_PLACES=156, PETRI_TRANSITIONS=284} [2021-10-15 20:25:59,475 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -47 predicate places. [2021-10-15 20:25:59,475 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 284 transitions, 1601 flow [2021-10-15 20:25:59,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:59,476 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:59,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:25:59,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash 606755529, now seen corresponding path program 1 times [2021-10-15 20:25:59,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:59,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351243335] [2021-10-15 20:25:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:59,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-10-15 20:25:59,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:59,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351243335] [2021-10-15 20:25:59,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351243335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:59,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241920850] [2021-10-15 20:25:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:59,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:59,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:59,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:59,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:25:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:59,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-10-15 20:26:00,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241920850] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:00,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:00,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-10-15 20:26:00,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269527246] [2021-10-15 20:26:00,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:00,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:26:00,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:26:00,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 284 transitions, 1601 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:00,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:00,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:26:00,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:01,897 INFO L129 PetriNetUnfolder]: 225/1757 cut-off events. [2021-10-15 20:26:01,897 INFO L130 PetriNetUnfolder]: For 1294/1294 co-relation queries the response was YES. [2021-10-15 20:26:01,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4328 conditions, 1757 events. 225/1757 cut-off events. For 1294/1294 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5543 event pairs, 0 based on Foata normal form. 1/1758 useless extension candidates. Maximal degree in co-relation 4314. Up to 1138 conditions per place. [2021-10-15 20:26:01,908 INFO L132 encePairwiseOnDemand]: 287/344 looper letters, 403 selfloop transitions, 95 changer transitions 0/503 dead transitions. [2021-10-15 20:26:01,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 503 transitions, 3683 flow [2021-10-15 20:26:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-10-15 20:26:01,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2021-10-15 20:26:01,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-10-15 20:26:01,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-10-15 20:26:01,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:01,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-10-15 20:26:01,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,918 INFO L186 Difference]: Start difference. First operand has 156 places, 284 transitions, 1601 flow. Second operand 3 states and 422 transitions. [2021-10-15 20:26:01,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 503 transitions, 3683 flow [2021-10-15 20:26:01,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 503 transitions, 3477 flow, removed 28 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:01,943 INFO L242 Difference]: Finished difference. Result has 158 places, 367 transitions, 2757 flow [2021-10-15 20:26:01,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2757, PETRI_PLACES=158, PETRI_TRANSITIONS=367} [2021-10-15 20:26:01,944 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -45 predicate places. [2021-10-15 20:26:01,944 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 367 transitions, 2757 flow [2021-10-15 20:26:01,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:01,945 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:01,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:02,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:02,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:02,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1835122135, now seen corresponding path program 1 times [2021-10-15 20:26:02,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:02,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869891679] [2021-10-15 20:26:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:02,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 79 proven. 40 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-10-15 20:26:02,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:02,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869891679] [2021-10-15 20:26:02,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869891679] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:02,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897618226] [2021-10-15 20:26:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:02,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:02,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:02,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:02,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:26:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:02,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:26:02,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-10-15 20:26:03,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897618226] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:03,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:03,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-10-15 20:26:03,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668757648] [2021-10-15 20:26:03,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:03,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:26:03,366 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:26:03,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 367 transitions, 2757 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,367 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:03,367 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:26:03,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:04,582 INFO L129 PetriNetUnfolder]: 255/2065 cut-off events. [2021-10-15 20:26:04,583 INFO L130 PetriNetUnfolder]: For 3183/3183 co-relation queries the response was YES. [2021-10-15 20:26:04,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5275 conditions, 2065 events. 255/2065 cut-off events. For 3183/3183 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7143 event pairs, 0 based on Foata normal form. 69/2134 useless extension candidates. Maximal degree in co-relation 5258. Up to 1703 conditions per place. [2021-10-15 20:26:04,596 INFO L132 encePairwiseOnDemand]: 290/344 looper letters, 468 selfloop transitions, 60 changer transitions 0/533 dead transitions. [2021-10-15 20:26:04,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 533 transitions, 4475 flow [2021-10-15 20:26:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-10-15 20:26:04,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2021-10-15 20:26:04,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-10-15 20:26:04,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-10-15 20:26:04,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:04,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-10-15 20:26:04,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:04,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:04,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:04,605 INFO L186 Difference]: Start difference. First operand has 158 places, 367 transitions, 2757 flow. Second operand 3 states and 422 transitions. [2021-10-15 20:26:04,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 533 transitions, 4475 flow [2021-10-15 20:26:04,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 533 transitions, 4237 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:04,639 INFO L242 Difference]: Finished difference. Result has 160 places, 397 transitions, 3331 flow [2021-10-15 20:26:04,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2549, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3331, PETRI_PLACES=160, PETRI_TRANSITIONS=397} [2021-10-15 20:26:04,640 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -43 predicate places. [2021-10-15 20:26:04,640 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 397 transitions, 3331 flow [2021-10-15 20:26:04,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:04,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:04,641 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:04,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:04,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:04,857 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:04,858 INFO L82 PathProgramCache]: Analyzing trace with hash 419342785, now seen corresponding path program 1 times [2021-10-15 20:26:04,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:04,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528449173] [2021-10-15 20:26:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:04,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-10-15 20:26:05,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:05,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528449173] [2021-10-15 20:26:05,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528449173] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:05,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:05,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:26:05,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65490795] [2021-10-15 20:26:05,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:26:05,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:26:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:26:05,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 20:26:05,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 397 transitions, 3331 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:05,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:05,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 20:26:05,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:06,369 INFO L129 PetriNetUnfolder]: 206/2292 cut-off events. [2021-10-15 20:26:06,370 INFO L130 PetriNetUnfolder]: For 3185/3185 co-relation queries the response was YES. [2021-10-15 20:26:06,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5508 conditions, 2292 events. 206/2292 cut-off events. For 3185/3185 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 8787 event pairs, 0 based on Foata normal form. 74/2366 useless extension candidates. Maximal degree in co-relation 5491. Up to 1834 conditions per place. [2021-10-15 20:26:06,381 INFO L132 encePairwiseOnDemand]: 292/344 looper letters, 0 selfloop transitions, 0 changer transitions 482/482 dead transitions. [2021-10-15 20:26:06,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 482 transitions, 3839 flow [2021-10-15 20:26:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:26:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:26:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2021-10-15 20:26:06,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40794573643410853 [2021-10-15 20:26:06,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2021-10-15 20:26:06,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2021-10-15 20:26:06,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:06,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2021-10-15 20:26:06,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,394 INFO L186 Difference]: Start difference. First operand has 160 places, 397 transitions, 3331 flow. Second operand 3 states and 421 transitions. [2021-10-15 20:26:06,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 482 transitions, 3839 flow [2021-10-15 20:26:06,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 482 transitions, 3521 flow, removed 108 selfloop flow, removed 2 redundant places. [2021-10-15 20:26:06,432 INFO L242 Difference]: Finished difference. Result has 158 places, 0 transitions, 0 flow [2021-10-15 20:26:06,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=158, PETRI_TRANSITIONS=0} [2021-10-15 20:26:06,433 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -45 predicate places. [2021-10-15 20:26:06,433 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 0 transitions, 0 flow [2021-10-15 20:26:06,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,436 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:26:06,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:26:06,443 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:26:06,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:26:06 BoogieIcfgContainer [2021-10-15 20:26:06,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:26:06,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:26:06,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:26:06,453 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:26:06,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:51" (3/4) ... [2021-10-15 20:26:06,457 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:26:06,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:26:06,492 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:26:06,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:26:06,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:26:06,639 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:26:06,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:26:06,643 INFO L168 Benchmark]: Toolchain (without parser) took 17057.85 ms. Allocated memory was 130.0 MB in the beginning and 283.1 MB in the end (delta: 153.1 MB). Free memory was 94.9 MB in the beginning and 93.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 155.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:06,644 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory is still 46.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:26:06,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 641.09 ms. Allocated memory is still 130.0 MB. Free memory was 94.9 MB in the beginning and 89.2 MB in the end (delta: 5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:06,645 INFO L168 Benchmark]: Boogie Procedure Inliner took 117.26 ms. Allocated memory is still 130.0 MB. Free memory was 89.2 MB in the beginning and 81.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:06,645 INFO L168 Benchmark]: Boogie Preprocessor took 75.20 ms. Allocated memory is still 130.0 MB. Free memory was 81.2 MB in the beginning and 76.2 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:06,645 INFO L168 Benchmark]: RCFGBuilder took 1469.86 ms. Allocated memory is still 130.0 MB. Free memory was 76.2 MB in the beginning and 77.7 MB in the end (delta: -1.6 MB). Peak memory consumption was 45.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:06,646 INFO L168 Benchmark]: TraceAbstraction took 14558.54 ms. Allocated memory was 130.0 MB in the beginning and 283.1 MB in the end (delta: 153.1 MB). Free memory was 77.2 MB in the beginning and 107.8 MB in the end (delta: -30.6 MB). Peak memory consumption was 122.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:06,646 INFO L168 Benchmark]: Witness Printer took 188.25 ms. Allocated memory is still 283.1 MB. Free memory was 107.8 MB in the beginning and 93.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:06,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory is still 46.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 641.09 ms. Allocated memory is still 130.0 MB. Free memory was 94.9 MB in the beginning and 89.2 MB in the end (delta: 5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 117.26 ms. Allocated memory is still 130.0 MB. Free memory was 89.2 MB in the beginning and 81.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.20 ms. Allocated memory is still 130.0 MB. Free memory was 81.2 MB in the beginning and 76.2 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1469.86 ms. Allocated memory is still 130.0 MB. Free memory was 76.2 MB in the beginning and 77.7 MB in the end (delta: -1.6 MB). Peak memory consumption was 45.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14558.54 ms. Allocated memory was 130.0 MB in the beginning and 283.1 MB in the end (delta: 153.1 MB). Free memory was 77.2 MB in the beginning and 107.8 MB in the end (delta: -30.6 MB). Peak memory consumption was 122.0 MB. Max. memory is 16.1 GB. * Witness Printer took 188.25 ms. Allocated memory is still 283.1 MB. Free memory was 107.8 MB in the beginning and 93.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 200]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 206 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 44.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14485.5ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 9632.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 160.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1003 SDtfs, 834 SDslu, 0 SDs, 0 SdLazy, 3609 SolverSat, 528 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4262.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 585 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 139.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3331occurred in iteration=8, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 143.8ms SsaConstructionTime, 591.6ms SatisfiabilityAnalysisTime, 3033.6ms InterpolantComputationTime, 2261 NumberOfCodeBlocks, 2261 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 2250 ConstructedInterpolants, 0 QuantifiedInterpolants, 8722 SizeOfPredicates, 0 NumberOfNonLiveVariables, 792 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 1437/1569 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:26:06,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_467774b3-bb3b-407b-adcb-74cbe11ac8ee/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...