./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.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_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/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_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/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_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/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 a436e4bf9da4ee1e6356d8c8c6b3cd5e98b60423 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:16:12,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:16:12,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:16:13,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:16:13,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:16:13,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:16:13,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:16:13,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:16:13,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:16:13,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:16:13,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:16:13,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:16:13,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:16:13,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:16:13,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:16:13,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:16:13,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:16:13,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:16:13,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:16:13,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:16:13,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:16:13,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:16:13,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:16:13,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:16:13,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:16:13,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:16:13,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:16:13,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:16:13,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:16:13,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:16:13,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:16:13,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:16:13,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:16:13,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:16:13,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:16:13,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:16:13,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:16:13,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:16:13,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:16:13,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:16:13,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:16:13,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:16:13,190 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:16:13,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:16:13,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:16:13,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:16:13,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:16:13,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:16:13,195 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:16:13,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:16:13,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:16:13,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:16:13,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:16:13,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:16:13,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:16:13,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:16:13,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:16:13,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:16:13,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:16:13,202 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:16:13,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:16:13,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:16:13,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:16:13,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:16:13,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:16:13,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:16:13,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:16:13,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:16:13,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:16:13,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:16:13,206 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:16:13,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:16:13,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:16:13,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:16:13,228 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_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a436e4bf9da4ee1e6356d8c8c6b3cd5e98b60423 [2021-10-15 19:16:13,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:16:13,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:16:13,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:16:13,607 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:16:13,608 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:16:13,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c [2021-10-15 19:16:13,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/data/42096efca/14097f97d9124bb99fb20dabcbb26042/FLAG0e390d128 [2021-10-15 19:16:14,318 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:16:14,319 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c [2021-10-15 19:16:14,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/data/42096efca/14097f97d9124bb99fb20dabcbb26042/FLAG0e390d128 [2021-10-15 19:16:14,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/data/42096efca/14097f97d9124bb99fb20dabcbb26042 [2021-10-15 19:16:14,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:16:14,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:16:14,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:16:14,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:16:14,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:16:14,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:16:14" (1/1) ... [2021-10-15 19:16:14,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4532aa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:14, skipping insertion in model container [2021-10-15 19:16:14,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:16:14" (1/1) ... [2021-10-15 19:16:14,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:16:14,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:16:14,923 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_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c[337,350] [2021-10-15 19:16:14,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:16:14,990 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:16:15,005 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_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c[337,350] [2021-10-15 19:16:15,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:16:15,053 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:16:15,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15 WrapperNode [2021-10-15 19:16:15,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:16:15,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:16:15,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:16:15,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:16:15,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:16:15,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:16:15,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:16:15,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:16:15,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:16:15,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:16:15,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:16:15,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:16:15,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (1/1) ... [2021-10-15 19:16:15,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:16:15,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:16:15,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:16:15,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:16:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:16:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:16:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:16:15,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:16:15,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:16:15,822 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2021-10-15 19:16:15,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:16:15 BoogieIcfgContainer [2021-10-15 19:16:15,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:16:15,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:16:15,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:16:15,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:16:15,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:16:14" (1/3) ... [2021-10-15 19:16:15,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec2bb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:16:15, skipping insertion in model container [2021-10-15 19:16:15,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:16:15" (2/3) ... [2021-10-15 19:16:15,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec2bb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:16:15, skipping insertion in model container [2021-10-15 19:16:15,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:16:15" (3/3) ... [2021-10-15 19:16:15,851 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2021-10-15 19:16:15,857 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:16:15,858 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 19:16:15,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:16:15,950 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 19:16:15,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 19:16:15,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 76 places, 116 transitions, 232 flow [2021-10-15 19:16:16,023 INFO L129 PetriNetUnfolder]: 41/116 cut-off events. [2021-10-15 19:16:16,023 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:16:16,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 116 events. 41/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 154 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-10-15 19:16:16,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 116 transitions, 232 flow [2021-10-15 19:16:16,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 110 transitions, 220 flow [2021-10-15 19:16:16,066 INFO L129 PetriNetUnfolder]: 39/108 cut-off events. [2021-10-15 19:16:16,066 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:16:16,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:16,067 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] [2021-10-15 19:16:16,068 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:16,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1325453254, now seen corresponding path program 1 times [2021-10-15 19:16:16,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:16,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039961898] [2021-10-15 19:16:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:16,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:16,322 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 19:16:16,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:16,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039961898] [2021-10-15 19:16:16,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039961898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:16,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:16,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:16,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388212738] [2021-10-15 19:16:16,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:16,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:16,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:16,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:16,363 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 116 [2021-10-15 19:16:16,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 110 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 19:16:16,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:16,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 116 [2021-10-15 19:16:16,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:16,490 INFO L129 PetriNetUnfolder]: 52/186 cut-off events. [2021-10-15 19:16:16,494 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:16:16,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 186 events. 52/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 471 event pairs, 0 based on Foata normal form. 10/148 useless extension candidates. Maximal degree in co-relation 39. Up to 12 conditions per place. [2021-10-15 19:16:16,503 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 10 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2021-10-15 19:16:16,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 254 flow [2021-10-15 19:16:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2021-10-15 19:16:16,535 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9109195402298851 [2021-10-15 19:16:16,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2021-10-15 19:16:16,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2021-10-15 19:16:16,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:16,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2021-10-15 19:16:16,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 19:16:16,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:16,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:16,575 INFO L186 Difference]: Start difference. First operand has 72 places, 110 transitions, 220 flow. Second operand 3 states and 317 transitions. [2021-10-15 19:16:16,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 254 flow [2021-10-15 19:16:16,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:16:16,595 INFO L242 Difference]: Finished difference. Result has 76 places, 108 transitions, 270 flow [2021-10-15 19:16:16,598 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=76, PETRI_TRANSITIONS=108} [2021-10-15 19:16:16,599 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2021-10-15 19:16:16,600 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 108 transitions, 270 flow [2021-10-15 19:16:16,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 19:16:16,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:16,601 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] [2021-10-15 19:16:16,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:16:16,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:16,604 INFO L82 PathProgramCache]: Analyzing trace with hash -391852367, now seen corresponding path program 1 times [2021-10-15 19:16:16,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:16,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428233368] [2021-10-15 19:16:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:16,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:16,740 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 19:16:16,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:16,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428233368] [2021-10-15 19:16:16,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428233368] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:16,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:16,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:16,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340402976] [2021-10-15 19:16:16,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:16,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:16,749 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 116 [2021-10-15 19:16:16,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 108 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 19:16:16,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:16,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 116 [2021-10-15 19:16:16,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:16,847 INFO L129 PetriNetUnfolder]: 72/264 cut-off events. [2021-10-15 19:16:16,848 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 19:16:16,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 264 events. 72/264 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 706 event pairs, 0 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 95. Up to 17 conditions per place. [2021-10-15 19:16:16,852 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 9 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2021-10-15 19:16:16,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 304 flow [2021-10-15 19:16:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2021-10-15 19:16:16,856 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8850574712643678 [2021-10-15 19:16:16,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2021-10-15 19:16:16,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2021-10-15 19:16:16,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:16,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2021-10-15 19:16:16,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 19:16:16,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:16,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:16,863 INFO L186 Difference]: Start difference. First operand has 76 places, 108 transitions, 270 flow. Second operand 3 states and 308 transitions. [2021-10-15 19:16:16,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 304 flow [2021-10-15 19:16:16,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:16,872 INFO L242 Difference]: Finished difference. Result has 78 places, 111 transitions, 284 flow [2021-10-15 19:16:16,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=78, PETRI_TRANSITIONS=111} [2021-10-15 19:16:16,874 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2021-10-15 19:16:16,874 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 111 transitions, 284 flow [2021-10-15 19:16:16,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 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 19:16:16,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:16,875 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] [2021-10-15 19:16:16,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:16:16,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1321560808, now seen corresponding path program 1 times [2021-10-15 19:16:16,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:16,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133996418] [2021-10-15 19:16:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:16,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:16,987 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 19:16:16,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:16,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133996418] [2021-10-15 19:16:16,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133996418] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:16,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:16,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:16,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862705400] [2021-10-15 19:16:16,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:16,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:16,994 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 116 [2021-10-15 19:16:16,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 111 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 19:16:16,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:16,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 116 [2021-10-15 19:16:16,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:17,156 INFO L129 PetriNetUnfolder]: 124/489 cut-off events. [2021-10-15 19:16:17,157 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 19:16:17,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 489 events. 124/489 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1831 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 250. Up to 33 conditions per place. [2021-10-15 19:16:17,167 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 13 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2021-10-15 19:16:17,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 334 flow [2021-10-15 19:16:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2021-10-15 19:16:17,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8706896551724138 [2021-10-15 19:16:17,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2021-10-15 19:16:17,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2021-10-15 19:16:17,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:17,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2021-10-15 19:16:17,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 19:16:17,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:17,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:17,184 INFO L186 Difference]: Start difference. First operand has 78 places, 111 transitions, 284 flow. Second operand 3 states and 303 transitions. [2021-10-15 19:16:17,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 334 flow [2021-10-15 19:16:17,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 116 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:17,202 INFO L242 Difference]: Finished difference. Result has 80 places, 114 transitions, 314 flow [2021-10-15 19:16:17,202 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=80, PETRI_TRANSITIONS=114} [2021-10-15 19:16:17,203 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 8 predicate places. [2021-10-15 19:16:17,203 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 114 transitions, 314 flow [2021-10-15 19:16:17,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 19:16:17,204 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:17,206 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:16:17,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:16:17,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -716500460, now seen corresponding path program 1 times [2021-10-15 19:16:17,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:17,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268943944] [2021-10-15 19:16:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:17,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:16:17,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:17,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268943944] [2021-10-15 19:16:17,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268943944] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:17,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:17,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:17,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136986334] [2021-10-15 19:16:17,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:17,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:17,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:17,350 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 116 [2021-10-15 19:16:17,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 114 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 19:16:17,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:17,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 116 [2021-10-15 19:16:17,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:17,488 INFO L129 PetriNetUnfolder]: 168/715 cut-off events. [2021-10-15 19:16:17,488 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2021-10-15 19:16:17,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 715 events. 168/715 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3174 event pairs, 1 based on Foata normal form. 0/598 useless extension candidates. Maximal degree in co-relation 482. Up to 55 conditions per place. [2021-10-15 19:16:17,495 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 14 selfloop transitions, 6 changer transitions 0/117 dead transitions. [2021-10-15 19:16:17,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 117 transitions, 358 flow [2021-10-15 19:16:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2021-10-15 19:16:17,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2021-10-15 19:16:17,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2021-10-15 19:16:17,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2021-10-15 19:16:17,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:17,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2021-10-15 19:16:17,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 19:16:17,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:17,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:17,509 INFO L186 Difference]: Start difference. First operand has 80 places, 114 transitions, 314 flow. Second operand 3 states and 299 transitions. [2021-10-15 19:16:17,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 117 transitions, 358 flow [2021-10-15 19:16:17,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:17,524 INFO L242 Difference]: Finished difference. Result has 81 places, 114 transitions, 330 flow [2021-10-15 19:16:17,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=81, PETRI_TRANSITIONS=114} [2021-10-15 19:16:17,525 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2021-10-15 19:16:17,525 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 114 transitions, 330 flow [2021-10-15 19:16:17,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 19:16:17,526 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:17,527 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] [2021-10-15 19:16:17,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:16:17,528 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:17,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1447057831, now seen corresponding path program 1 times [2021-10-15 19:16:17,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:17,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547709504] [2021-10-15 19:16:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:17,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:17,660 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 19:16:17,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:17,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547709504] [2021-10-15 19:16:17,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547709504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:17,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:17,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:17,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859043525] [2021-10-15 19:16:17,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:17,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:17,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:17,669 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 116 [2021-10-15 19:16:17,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 114 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 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 19:16:17,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:17,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 116 [2021-10-15 19:16:17,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:17,809 INFO L129 PetriNetUnfolder]: 204/920 cut-off events. [2021-10-15 19:16:17,810 INFO L130 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2021-10-15 19:16:17,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 920 events. 204/920 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4798 event pairs, 2 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 509. Up to 69 conditions per place. [2021-10-15 19:16:17,820 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 12 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2021-10-15 19:16:17,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 376 flow [2021-10-15 19:16:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2021-10-15 19:16:17,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8649425287356322 [2021-10-15 19:16:17,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2021-10-15 19:16:17,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2021-10-15 19:16:17,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:17,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2021-10-15 19:16:17,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 19:16:17,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:17,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:17,830 INFO L186 Difference]: Start difference. First operand has 81 places, 114 transitions, 330 flow. Second operand 3 states and 301 transitions. [2021-10-15 19:16:17,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 376 flow [2021-10-15 19:16:17,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 118 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:16:17,840 INFO L242 Difference]: Finished difference. Result has 84 places, 117 transitions, 362 flow [2021-10-15 19:16:17,840 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=84, PETRI_TRANSITIONS=117} [2021-10-15 19:16:17,841 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2021-10-15 19:16:17,841 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 117 transitions, 362 flow [2021-10-15 19:16:17,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 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 19:16:17,842 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:17,842 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:16:17,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:16:17,843 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash -179687388, now seen corresponding path program 1 times [2021-10-15 19:16:17,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:17,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378140657] [2021-10-15 19:16:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:17,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:16:17,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:17,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378140657] [2021-10-15 19:16:17,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378140657] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:17,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:17,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:16:17,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336338543] [2021-10-15 19:16:17,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:16:17,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:16:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:16:17,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 116 [2021-10-15 19:16:17,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 117 transitions, 362 flow. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 19:16:17,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:17,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 116 [2021-10-15 19:16:17,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:18,146 INFO L129 PetriNetUnfolder]: 214/969 cut-off events. [2021-10-15 19:16:18,146 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2021-10-15 19:16:18,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1309 conditions, 969 events. 214/969 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5109 event pairs, 4 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 508. Up to 75 conditions per place. [2021-10-15 19:16:18,153 INFO L132 encePairwiseOnDemand]: 112/116 looper letters, 3 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2021-10-15 19:16:18,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 116 transitions, 374 flow [2021-10-15 19:16:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:16:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:16:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 410 transitions. [2021-10-15 19:16:18,156 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8836206896551724 [2021-10-15 19:16:18,157 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 410 transitions. [2021-10-15 19:16:18,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 410 transitions. [2021-10-15 19:16:18,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:18,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 410 transitions. [2021-10-15 19:16:18,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 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 19:16:18,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 19:16:18,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 19:16:18,163 INFO L186 Difference]: Start difference. First operand has 84 places, 117 transitions, 362 flow. Second operand 4 states and 410 transitions. [2021-10-15 19:16:18,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 116 transitions, 374 flow [2021-10-15 19:16:18,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:18,169 INFO L242 Difference]: Finished difference. Result has 84 places, 116 transitions, 365 flow [2021-10-15 19:16:18,170 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=84, PETRI_TRANSITIONS=116} [2021-10-15 19:16:18,170 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2021-10-15 19:16:18,170 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 116 transitions, 365 flow [2021-10-15 19:16:18,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 19:16:18,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:18,173 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:16:18,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:16:18,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:18,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1896982169, now seen corresponding path program 1 times [2021-10-15 19:16:18,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:18,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158687045] [2021-10-15 19:16:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:18,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:16:18,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:18,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158687045] [2021-10-15 19:16:18,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158687045] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:18,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:18,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:18,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087868775] [2021-10-15 19:16:18,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:18,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:18,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:18,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:18,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2021-10-15 19:16:18,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 116 transitions, 365 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:16:18,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:18,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2021-10-15 19:16:18,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:18,319 INFO L129 PetriNetUnfolder]: 178/787 cut-off events. [2021-10-15 19:16:18,319 INFO L130 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2021-10-15 19:16:18,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 787 events. 178/787 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3856 event pairs, 2 based on Foata normal form. 2/688 useless extension candidates. Maximal degree in co-relation 946. Up to 59 conditions per place. [2021-10-15 19:16:18,325 INFO L132 encePairwiseOnDemand]: 114/116 looper letters, 2 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2021-10-15 19:16:18,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 367 flow [2021-10-15 19:16:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2021-10-15 19:16:18,328 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8908045977011494 [2021-10-15 19:16:18,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2021-10-15 19:16:18,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2021-10-15 19:16:18,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:18,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2021-10-15 19:16:18,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 19:16:18,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:18,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:18,336 INFO L186 Difference]: Start difference. First operand has 84 places, 116 transitions, 365 flow. Second operand 3 states and 310 transitions. [2021-10-15 19:16:18,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 367 flow [2021-10-15 19:16:18,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 115 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:18,344 INFO L242 Difference]: Finished difference. Result has 84 places, 115 transitions, 360 flow [2021-10-15 19:16:18,344 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=84, PETRI_TRANSITIONS=115} [2021-10-15 19:16:18,345 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2021-10-15 19:16:18,353 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 115 transitions, 360 flow [2021-10-15 19:16:18,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:16:18,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:18,354 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:16:18,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:16:18,355 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:18,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1275353301, now seen corresponding path program 1 times [2021-10-15 19:16:18,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:18,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676756314] [2021-10-15 19:16:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:18,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:16:18,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:18,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676756314] [2021-10-15 19:16:18,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676756314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:16:18,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009910528] [2021-10-15 19:16:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:18,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:16:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:16:18,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:16:18,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:16:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:16:18,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:16:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:16:19,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009910528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:16:19,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:16:19,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-15 19:16:19,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192809485] [2021-10-15 19:16:19,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:16:19,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:16:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:16:19,698 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 116 [2021-10-15 19:16:19,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 115 transitions, 360 flow. Second operand has 6 states, 6 states have (on average 101.16666666666667) internal successors, (607), 6 states have internal predecessors, (607), 0 states have call successors, (0), 0 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 19:16:19,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:19,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 116 [2021-10-15 19:16:19,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:19,907 INFO L129 PetriNetUnfolder]: 287/1279 cut-off events. [2021-10-15 19:16:19,907 INFO L130 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2021-10-15 19:16:19,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 1279 events. 287/1279 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 7284 event pairs, 8 based on Foata normal form. 0/1109 useless extension candidates. Maximal degree in co-relation 1736. Up to 95 conditions per place. [2021-10-15 19:16:19,918 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 6 selfloop transitions, 8 changer transitions 0/121 dead transitions. [2021-10-15 19:16:19,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 418 flow [2021-10-15 19:16:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:16:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:16:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 613 transitions. [2021-10-15 19:16:19,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8807471264367817 [2021-10-15 19:16:19,923 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 613 transitions. [2021-10-15 19:16:19,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 613 transitions. [2021-10-15 19:16:19,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:19,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 613 transitions. [2021-10-15 19:16:19,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.16666666666667) internal successors, (613), 6 states have internal predecessors, (613), 0 states have call successors, (0), 0 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 19:16:19,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 19:16:19,930 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 19:16:19,931 INFO L186 Difference]: Start difference. First operand has 84 places, 115 transitions, 360 flow. Second operand 6 states and 613 transitions. [2021-10-15 19:16:19,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 418 flow [2021-10-15 19:16:19,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 121 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:16:19,938 INFO L242 Difference]: Finished difference. Result has 91 places, 121 transitions, 427 flow [2021-10-15 19:16:19,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=91, PETRI_TRANSITIONS=121} [2021-10-15 19:16:19,939 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 19 predicate places. [2021-10-15 19:16:19,939 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 121 transitions, 427 flow [2021-10-15 19:16:19,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.16666666666667) internal successors, (607), 6 states have internal predecessors, (607), 0 states have call successors, (0), 0 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 19:16:19,943 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:19,943 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:16:19,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:16:20,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:16:20,157 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash 602571322, now seen corresponding path program 2 times [2021-10-15 19:16:20,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:20,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366223885] [2021-10-15 19:16:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:20,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:16:20,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:20,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366223885] [2021-10-15 19:16:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366223885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:20,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:20,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:20,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625423825] [2021-10-15 19:16:20,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:20,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:20,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 116 [2021-10-15 19:16:20,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 121 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 19:16:20,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:20,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 116 [2021-10-15 19:16:20,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:20,358 INFO L129 PetriNetUnfolder]: 216/1026 cut-off events. [2021-10-15 19:16:20,359 INFO L130 PetriNetUnfolder]: For 323/323 co-relation queries the response was YES. [2021-10-15 19:16:20,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 1026 events. 216/1026 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4847 event pairs, 2 based on Foata normal form. 28/911 useless extension candidates. Maximal degree in co-relation 1451. Up to 75 conditions per place. [2021-10-15 19:16:20,366 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 10 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2021-10-15 19:16:20,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 116 transitions, 423 flow [2021-10-15 19:16:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2021-10-15 19:16:20,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8764367816091954 [2021-10-15 19:16:20,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2021-10-15 19:16:20,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2021-10-15 19:16:20,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:20,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2021-10-15 19:16:20,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 19:16:20,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:20,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:20,374 INFO L186 Difference]: Start difference. First operand has 91 places, 121 transitions, 427 flow. Second operand 3 states and 305 transitions. [2021-10-15 19:16:20,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 116 transitions, 423 flow [2021-10-15 19:16:20,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 116 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:20,380 INFO L242 Difference]: Finished difference. Result has 92 places, 116 transitions, 400 flow [2021-10-15 19:16:20,380 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=92, PETRI_TRANSITIONS=116} [2021-10-15 19:16:20,381 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 20 predicate places. [2021-10-15 19:16:20,381 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 116 transitions, 400 flow [2021-10-15 19:16:20,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 19:16:20,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:20,382 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2021-10-15 19:16:20,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:16:20,382 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:20,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1122767734, now seen corresponding path program 1 times [2021-10-15 19:16:20,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:20,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782760950] [2021-10-15 19:16:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:20,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:16:20,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:20,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782760950] [2021-10-15 19:16:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782760950] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:20,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:20,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:20,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669375063] [2021-10-15 19:16:20,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:20,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:20,445 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 116 [2021-10-15 19:16:20,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 19:16:20,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:20,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 116 [2021-10-15 19:16:20,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:20,602 INFO L129 PetriNetUnfolder]: 196/1054 cut-off events. [2021-10-15 19:16:20,602 INFO L130 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2021-10-15 19:16:20,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1584 conditions, 1054 events. 196/1054 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5255 event pairs, 0 based on Foata normal form. 20/949 useless extension candidates. Maximal degree in co-relation 1559. Up to 75 conditions per place. [2021-10-15 19:16:20,610 INFO L132 encePairwiseOnDemand]: 108/116 looper letters, 10 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2021-10-15 19:16:20,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 118 transitions, 448 flow [2021-10-15 19:16:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2021-10-15 19:16:20,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8505747126436781 [2021-10-15 19:16:20,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2021-10-15 19:16:20,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2021-10-15 19:16:20,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:20,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2021-10-15 19:16:20,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 19:16:20,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:20,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:20,618 INFO L186 Difference]: Start difference. First operand has 92 places, 116 transitions, 400 flow. Second operand 3 states and 296 transitions. [2021-10-15 19:16:20,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 118 transitions, 448 flow [2021-10-15 19:16:20,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 118 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:20,624 INFO L242 Difference]: Finished difference. Result has 93 places, 118 transitions, 430 flow [2021-10-15 19:16:20,625 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=93, PETRI_TRANSITIONS=118} [2021-10-15 19:16:20,625 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 21 predicate places. [2021-10-15 19:16:20,625 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 118 transitions, 430 flow [2021-10-15 19:16:20,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 19:16:20,626 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:20,626 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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 19:16:20,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:16:20,627 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1441989612, now seen corresponding path program 1 times [2021-10-15 19:16:20,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:20,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140893716] [2021-10-15 19:16:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:20,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:16:20,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:20,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140893716] [2021-10-15 19:16:20,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140893716] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:20,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:20,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:20,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309337892] [2021-10-15 19:16:20,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:20,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:20,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 116 [2021-10-15 19:16:20,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 118 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 19:16:20,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:20,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 116 [2021-10-15 19:16:20,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:20,790 INFO L129 PetriNetUnfolder]: 99/703 cut-off events. [2021-10-15 19:16:20,791 INFO L130 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2021-10-15 19:16:20,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 703 events. 99/703 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2565 event pairs, 0 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 1092. Up to 47 conditions per place. [2021-10-15 19:16:20,796 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 10 selfloop transitions, 5 changer transitions 3/112 dead transitions. [2021-10-15 19:16:20,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 112 transitions, 432 flow [2021-10-15 19:16:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2021-10-15 19:16:20,799 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477011494252874 [2021-10-15 19:16:20,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2021-10-15 19:16:20,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2021-10-15 19:16:20,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:20,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2021-10-15 19:16:20,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 19:16:20,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:20,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:20,804 INFO L186 Difference]: Start difference. First operand has 93 places, 118 transitions, 430 flow. Second operand 3 states and 295 transitions. [2021-10-15 19:16:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 112 transitions, 432 flow [2021-10-15 19:16:20,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 112 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:16:20,810 INFO L242 Difference]: Finished difference. Result has 94 places, 109 transitions, 392 flow [2021-10-15 19:16:20,810 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=94, PETRI_TRANSITIONS=109} [2021-10-15 19:16:20,811 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 22 predicate places. [2021-10-15 19:16:20,811 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 109 transitions, 392 flow [2021-10-15 19:16:20,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 19:16:20,812 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:20,812 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:16:20,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:16:20,818 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2139743509, now seen corresponding path program 1 times [2021-10-15 19:16:20,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:20,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572902743] [2021-10-15 19:16:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:20,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:16:20,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:20,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572902743] [2021-10-15 19:16:20,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572902743] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:20,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:20,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:20,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871454865] [2021-10-15 19:16:20,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:20,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:20,871 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 116 [2021-10-15 19:16:20,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 109 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 19:16:20,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:20,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 116 [2021-10-15 19:16:20,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:20,962 INFO L129 PetriNetUnfolder]: 65/521 cut-off events. [2021-10-15 19:16:20,962 INFO L130 PetriNetUnfolder]: For 218/218 co-relation queries the response was YES. [2021-10-15 19:16:20,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 521 events. 65/521 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1668 event pairs, 0 based on Foata normal form. 1/491 useless extension candidates. Maximal degree in co-relation 802. Up to 33 conditions per place. [2021-10-15 19:16:20,966 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 10 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2021-10-15 19:16:20,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 106 transitions, 408 flow [2021-10-15 19:16:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:20,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2021-10-15 19:16:20,969 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2021-10-15 19:16:20,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2021-10-15 19:16:20,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2021-10-15 19:16:20,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:20,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2021-10-15 19:16:20,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 19:16:20,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:20,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:20,974 INFO L186 Difference]: Start difference. First operand has 94 places, 109 transitions, 392 flow. Second operand 3 states and 299 transitions. [2021-10-15 19:16:20,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 106 transitions, 408 flow [2021-10-15 19:16:20,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 106 transitions, 396 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:20,981 INFO L242 Difference]: Finished difference. Result has 95 places, 106 transitions, 380 flow [2021-10-15 19:16:20,982 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2021-10-15 19:16:20,982 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 23 predicate places. [2021-10-15 19:16:20,982 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 380 flow [2021-10-15 19:16:20,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 19:16:20,983 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:20,983 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 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 19:16:20,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:16:20,984 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1787511956, now seen corresponding path program 1 times [2021-10-15 19:16:20,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:20,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129067543] [2021-10-15 19:16:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:20,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:16:21,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:21,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129067543] [2021-10-15 19:16:21,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129067543] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:21,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:21,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:21,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223291500] [2021-10-15 19:16:21,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:21,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:21,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:21,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:21,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 116 [2021-10-15 19:16:21,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 19:16:21,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:21,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 116 [2021-10-15 19:16:21,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:21,115 INFO L129 PetriNetUnfolder]: 64/520 cut-off events. [2021-10-15 19:16:21,115 INFO L130 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2021-10-15 19:16:21,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 520 events. 64/520 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1663 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 798. Up to 33 conditions per place. [2021-10-15 19:16:21,119 INFO L132 encePairwiseOnDemand]: 112/116 looper letters, 4 selfloop transitions, 4 changer transitions 0/105 dead transitions. [2021-10-15 19:16:21,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 105 transitions, 394 flow [2021-10-15 19:16:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2021-10-15 19:16:21,122 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.867816091954023 [2021-10-15 19:16:21,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2021-10-15 19:16:21,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2021-10-15 19:16:21,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:21,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2021-10-15 19:16:21,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 19:16:21,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:21,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:21,127 INFO L186 Difference]: Start difference. First operand has 95 places, 106 transitions, 380 flow. Second operand 3 states and 302 transitions. [2021-10-15 19:16:21,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 105 transitions, 394 flow [2021-10-15 19:16:21,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 105 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:16:21,133 INFO L242 Difference]: Finished difference. Result has 96 places, 105 transitions, 384 flow [2021-10-15 19:16:21,133 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2021-10-15 19:16:21,134 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 24 predicate places. [2021-10-15 19:16:21,134 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 384 flow [2021-10-15 19:16:21,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 19:16:21,135 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:21,135 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 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 19:16:21,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:16:21,135 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:21,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1803305457, now seen corresponding path program 1 times [2021-10-15 19:16:21,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:21,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575411046] [2021-10-15 19:16:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:21,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:16:21,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:21,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575411046] [2021-10-15 19:16:21,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575411046] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:21,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:21,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:16:21,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112948337] [2021-10-15 19:16:21,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:16:21,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:16:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:16:21,200 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 116 [2021-10-15 19:16:21,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 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 19:16:21,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:21,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 116 [2021-10-15 19:16:21,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:21,278 INFO L129 PetriNetUnfolder]: 48/451 cut-off events. [2021-10-15 19:16:21,278 INFO L130 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2021-10-15 19:16:21,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 451 events. 48/451 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1275 event pairs, 0 based on Foata normal form. 8/434 useless extension candidates. Maximal degree in co-relation 707. Up to 29 conditions per place. [2021-10-15 19:16:21,282 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 11 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2021-10-15 19:16:21,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 103 transitions, 404 flow [2021-10-15 19:16:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:16:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:16:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2021-10-15 19:16:21,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8620689655172413 [2021-10-15 19:16:21,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2021-10-15 19:16:21,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2021-10-15 19:16:21,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:21,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2021-10-15 19:16:21,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 19:16:21,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:21,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 19:16:21,289 INFO L186 Difference]: Start difference. First operand has 96 places, 105 transitions, 384 flow. Second operand 3 states and 300 transitions. [2021-10-15 19:16:21,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 103 transitions, 404 flow [2021-10-15 19:16:21,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 103 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:16:21,295 INFO L242 Difference]: Finished difference. Result has 97 places, 103 transitions, 380 flow [2021-10-15 19:16:21,295 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2021-10-15 19:16:21,295 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 25 predicate places. [2021-10-15 19:16:21,296 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 380 flow [2021-10-15 19:16:21,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 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 19:16:21,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:21,297 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:21,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:16:21,297 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1342369766, now seen corresponding path program 1 times [2021-10-15 19:16:21,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:21,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026585270] [2021-10-15 19:16:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:21,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-15 19:16:21,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:21,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026585270] [2021-10-15 19:16:21,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026585270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:21,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:21,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:16:21,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588263998] [2021-10-15 19:16:21,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:16:21,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:21,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:16:21,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:16:21,377 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 116 [2021-10-15 19:16:21,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 19:16:21,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:21,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 116 [2021-10-15 19:16:21,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:21,465 INFO L129 PetriNetUnfolder]: 48/471 cut-off events. [2021-10-15 19:16:21,465 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2021-10-15 19:16:21,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 471 events. 48/471 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1388 event pairs, 0 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 754. Up to 35 conditions per place. [2021-10-15 19:16:21,468 INFO L132 encePairwiseOnDemand]: 108/116 looper letters, 6 selfloop transitions, 10 changer transitions 0/103 dead transitions. [2021-10-15 19:16:21,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 412 flow [2021-10-15 19:16:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:16:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:16:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 474 transitions. [2021-10-15 19:16:21,472 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8172413793103448 [2021-10-15 19:16:21,472 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 474 transitions. [2021-10-15 19:16:21,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 474 transitions. [2021-10-15 19:16:21,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:21,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 474 transitions. [2021-10-15 19:16:21,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 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 19:16:21,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 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 19:16:21,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 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 19:16:21,479 INFO L186 Difference]: Start difference. First operand has 97 places, 103 transitions, 380 flow. Second operand 5 states and 474 transitions. [2021-10-15 19:16:21,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 412 flow [2021-10-15 19:16:21,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:16:21,485 INFO L242 Difference]: Finished difference. Result has 101 places, 103 transitions, 405 flow [2021-10-15 19:16:21,485 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=405, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2021-10-15 19:16:21,486 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 29 predicate places. [2021-10-15 19:16:21,486 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 405 flow [2021-10-15 19:16:21,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 19:16:21,486 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:21,487 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:16:21,487 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 960008792, now seen corresponding path program 1 times [2021-10-15 19:16:21,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:21,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084995679] [2021-10-15 19:16:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:21,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 19:16:21,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:21,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084995679] [2021-10-15 19:16:21,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084995679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:21,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:21,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:16:21,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146662087] [2021-10-15 19:16:21,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:16:21,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:16:21,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:16:21,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 116 [2021-10-15 19:16:21,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 405 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 19:16:21,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:21,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 116 [2021-10-15 19:16:21,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:21,689 INFO L129 PetriNetUnfolder]: 34/437 cut-off events. [2021-10-15 19:16:21,689 INFO L130 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2021-10-15 19:16:21,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 437 events. 34/437 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1236 event pairs, 0 based on Foata normal form. 12/432 useless extension candidates. Maximal degree in co-relation 760. Up to 34 conditions per place. [2021-10-15 19:16:21,693 INFO L132 encePairwiseOnDemand]: 103/116 looper letters, 11 selfloop transitions, 11 changer transitions 3/105 dead transitions. [2021-10-15 19:16:21,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 442 flow [2021-10-15 19:16:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:16:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:16:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2021-10-15 19:16:21,696 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8089080459770115 [2021-10-15 19:16:21,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2021-10-15 19:16:21,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2021-10-15 19:16:21,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:21,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2021-10-15 19:16:21,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 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 19:16:21,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 19:16:21,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 19:16:21,704 INFO L186 Difference]: Start difference. First operand has 101 places, 103 transitions, 405 flow. Second operand 6 states and 563 transitions. [2021-10-15 19:16:21,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 442 flow [2021-10-15 19:16:21,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 418 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-10-15 19:16:21,711 INFO L242 Difference]: Finished difference. Result has 106 places, 102 transitions, 420 flow [2021-10-15 19:16:21,711 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2021-10-15 19:16:21,711 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 34 predicate places. [2021-10-15 19:16:21,711 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 420 flow [2021-10-15 19:16:21,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 19:16:21,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:16:21,712 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:21,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:16:21,713 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:16:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:16:21,713 INFO L82 PathProgramCache]: Analyzing trace with hash 961855834, now seen corresponding path program 1 times [2021-10-15 19:16:21,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:16:21,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516304595] [2021-10-15 19:16:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:16:21,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:16:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:16:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:16:21,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:16:21,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516304595] [2021-10-15 19:16:21,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516304595] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:16:21,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:16:21,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:16:21,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560821821] [2021-10-15 19:16:21,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:16:21,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:16:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:16:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:16:21,819 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 116 [2021-10-15 19:16:21,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 420 flow. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 19:16:21,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:16:21,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 116 [2021-10-15 19:16:21,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:16:21,880 INFO L129 PetriNetUnfolder]: 30/369 cut-off events. [2021-10-15 19:16:21,880 INFO L130 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2021-10-15 19:16:21,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 369 events. 30/369 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 835 event pairs, 0 based on Foata normal form. 2/350 useless extension candidates. Maximal degree in co-relation 623. Up to 25 conditions per place. [2021-10-15 19:16:21,882 INFO L132 encePairwiseOnDemand]: 112/116 looper letters, 0 selfloop transitions, 0 changer transitions 100/100 dead transitions. [2021-10-15 19:16:21,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 100 transitions, 434 flow [2021-10-15 19:16:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:16:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:16:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 406 transitions. [2021-10-15 19:16:21,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875 [2021-10-15 19:16:21,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 406 transitions. [2021-10-15 19:16:21,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 406 transitions. [2021-10-15 19:16:21,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:16:21,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 406 transitions. [2021-10-15 19:16:21,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 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 19:16:21,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 19:16:21,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 19:16:21,890 INFO L186 Difference]: Start difference. First operand has 106 places, 102 transitions, 420 flow. Second operand 4 states and 406 transitions. [2021-10-15 19:16:21,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 100 transitions, 434 flow [2021-10-15 19:16:21,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 419 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 19:16:21,896 INFO L242 Difference]: Finished difference. Result has 102 places, 0 transitions, 0 flow [2021-10-15 19:16:21,896 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=102, PETRI_TRANSITIONS=0} [2021-10-15 19:16:21,897 INFO L334 CegarLoopForPetriNet]: 72 programPoint places, 30 predicate places. [2021-10-15 19:16:21,897 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 0 transitions, 0 flow [2021-10-15 19:16:21,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 19:16:21,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:16:21,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:16:21,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 19:16:21,907 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:16:21,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:16:21 BoogieIcfgContainer [2021-10-15 19:16:21,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:16:21,913 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:16:21,913 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:16:21,913 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:16:21,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:16:15" (3/4) ... [2021-10-15 19:16:21,917 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:16:21,933 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-15 19:16:21,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:16:21,935 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:16:21,936 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:16:22,013 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:16:22,013 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:16:22,015 INFO L168 Benchmark]: Toolchain (without parser) took 7370.60 ms. Allocated memory was 90.2 MB in the beginning and 142.6 MB in the end (delta: 52.4 MB). Free memory was 48.7 MB in the beginning and 115.0 MB in the end (delta: -66.4 MB). Peak memory consumption was 66.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:16:22,016 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory is still 64.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:16:22,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.39 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 69.4 MB in the beginning and 83.4 MB in the end (delta: -14.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:16:22,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.35 ms. Allocated memory is still 115.3 MB. Free memory was 83.4 MB in the beginning and 81.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:16:22,018 INFO L168 Benchmark]: Boogie Preprocessor took 57.19 ms. Allocated memory is still 115.3 MB. Free memory was 81.1 MB in the beginning and 79.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:16:22,018 INFO L168 Benchmark]: RCFGBuilder took 647.71 ms. Allocated memory is still 115.3 MB. Free memory was 79.6 MB in the beginning and 64.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:16:22,019 INFO L168 Benchmark]: TraceAbstraction took 6086.17 ms. Allocated memory was 115.3 MB in the beginning and 142.6 MB in the end (delta: 27.3 MB). Free memory was 64.3 MB in the beginning and 38.8 MB in the end (delta: 25.4 MB). Peak memory consumption was 55.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:16:22,019 INFO L168 Benchmark]: Witness Printer took 100.80 ms. Allocated memory is still 142.6 MB. Free memory was 38.8 MB in the beginning and 115.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 2.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:16:22,022 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory is still 64.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 387.39 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 69.4 MB in the beginning and 83.4 MB in the end (delta: -14.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.35 ms. Allocated memory is still 115.3 MB. Free memory was 83.4 MB in the beginning and 81.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.19 ms. Allocated memory is still 115.3 MB. Free memory was 81.1 MB in the beginning and 79.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 647.71 ms. Allocated memory is still 115.3 MB. Free memory was 79.6 MB in the beginning and 64.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6086.17 ms. Allocated memory was 115.3 MB in the beginning and 142.6 MB in the end (delta: 27.3 MB). Free memory was 64.3 MB in the beginning and 38.8 MB in the end (delta: 25.4 MB). Peak memory consumption was 55.7 MB. Max. memory is 16.1 GB. * Witness Printer took 100.80 ms. Allocated memory is still 142.6 MB. Free memory was 38.8 MB in the beginning and 115.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 2.4 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: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 11]: 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, 76 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 29.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5977.9ms, OverallIterations: 17, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 2613.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 86.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 126 SDtfs, 54 SDslu, 18 SDs, 0 SdLazy, 178 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 327.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 154.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=430occurred in iteration=10, InterpolantAutomatonStates: 61, 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: 125.1ms SsaConstructionTime, 436.6ms SatisfiabilityAnalysisTime, 2048.0ms InterpolantComputationTime, 1261 NumberOfCodeBlocks, 1261 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1243 ConstructedInterpolants, 0 QuantifiedInterpolants, 2953 SizeOfPredicates, 2 NumberOfNonLiveVariables, 218 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 18 InterpolantComputations, 16 PerfectInterpolantSequences, 388/392 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:16:22,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce58769-9585-4bc8-9ac2-bb528a4ccf12/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...