./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-bakery-2.wvr.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_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/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_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-bakery-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/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_d9262555-ed66-4398-8c4a-9dc289aa02ef/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 4c08b2ab62201ccddd617a7142327e63096a4a5c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:01:49,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:01:49,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:01:49,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:01:49,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:01:49,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:01:49,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:01:49,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:01:49,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:01:49,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:01:49,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:01:49,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:01:49,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:01:49,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:01:49,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:01:49,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:01:49,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:01:49,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:01:49,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:01:49,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:01:49,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:01:49,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:01:49,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:01:49,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:01:49,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:01:49,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:01:49,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:01:49,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:01:49,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:01:49,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:01:49,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:01:49,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:01:49,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:01:49,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:01:49,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:01:49,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:01:49,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:01:49,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:01:49,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:01:49,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:01:49,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:01:49,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:01:49,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:01:49,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:01:49,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:01:49,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:01:49,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:01:49,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:01:49,195 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:01:49,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:01:49,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:01:49,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:01:49,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:01:49,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:01:49,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:01:49,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:01:49,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:01:49,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:01:49,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:01:49,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:01:49,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:01:49,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:01:49,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:01:49,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:01:49,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:01:49,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:01:49,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:01:49,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:01:49,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:01:49,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:01:49,200 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:01:49,202 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:01:49,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:01:49,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:01:49,203 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_d9262555-ed66-4398-8c4a-9dc289aa02ef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c08b2ab62201ccddd617a7142327e63096a4a5c [2021-10-15 20:01:49,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:01:49,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:01:49,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:01:49,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:01:49,512 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:01:49,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/weaver/parallel-bakery-2.wvr.c [2021-10-15 20:01:49,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/data/8d25e0536/225b36c1a9bb47e0b65cf19857089f9a/FLAG14028c6cc [2021-10-15 20:01:50,132 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:01:50,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/sv-benchmarks/c/weaver/parallel-bakery-2.wvr.c [2021-10-15 20:01:50,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/data/8d25e0536/225b36c1a9bb47e0b65cf19857089f9a/FLAG14028c6cc [2021-10-15 20:01:50,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/data/8d25e0536/225b36c1a9bb47e0b65cf19857089f9a [2021-10-15 20:01:50,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:01:50,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:01:50,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:01:50,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:01:50,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:01:50,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173d6705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50, skipping insertion in model container [2021-10-15 20:01:50,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:01:50,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:01:50,763 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_d9262555-ed66-4398-8c4a-9dc289aa02ef/sv-benchmarks/c/weaver/parallel-bakery-2.wvr.c[2504,2517] [2021-10-15 20:01:50,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:01:50,782 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:01:50,825 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_d9262555-ed66-4398-8c4a-9dc289aa02ef/sv-benchmarks/c/weaver/parallel-bakery-2.wvr.c[2504,2517] [2021-10-15 20:01:50,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:01:50,840 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:01:50,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50 WrapperNode [2021-10-15 20:01:50,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:01:50,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:01:50,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:01:50,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:01:50,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:01:50,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:01:50,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:01:50,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:01:50,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:01:50,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:01:50,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:01:50,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:01:50,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (1/1) ... [2021-10-15 20:01:50,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:01:50,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:01:50,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:01:51,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:01:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-15 20:01:51,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-15 20:01:51,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-15 20:01:51,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-15 20:01:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:01:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:01:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:01:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:01:51,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:01:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:01:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:01:51,047 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-15 20:01:51,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:01:51,357 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-15 20:01:51,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:01:51 BoogieIcfgContainer [2021-10-15 20:01:51,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:01:51,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:01:51,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:01:51,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:01:51,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:01:50" (1/3) ... [2021-10-15 20:01:51,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4372a3ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:01:51, skipping insertion in model container [2021-10-15 20:01:51,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:50" (2/3) ... [2021-10-15 20:01:51,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4372a3ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:01:51, skipping insertion in model container [2021-10-15 20:01:51,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:01:51" (3/3) ... [2021-10-15 20:01:51,368 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-bakery-2.wvr.c [2021-10-15 20:01:51,373 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-15 20:01:51,373 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:01:51,374 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:01:51,374 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-15 20:01:51,424 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,425 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,425 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,425 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,426 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,426 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,426 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,427 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,440 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,441 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,441 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,441 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,442 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,442 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,442 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,442 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,443 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,443 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,443 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,443 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,444 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,444 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,444 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,444 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,444 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,445 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,445 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,445 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,446 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,446 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,446 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,446 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,447 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,447 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,447 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,447 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,448 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,448 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,449 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,449 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,449 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,449 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,451 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,451 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,451 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,452 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,453 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,453 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,453 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,453 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,454 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,454 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,454 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,454 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,455 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,455 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,455 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,456 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,472 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,473 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,473 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,473 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,474 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,474 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,474 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,474 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,475 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,475 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,475 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,475 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,476 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,476 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,476 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,476 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,477 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,477 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,477 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,481 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,481 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,481 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,482 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,482 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,482 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,482 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,489 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,490 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,490 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,491 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,492 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,492 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,503 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,507 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,507 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,507 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,508 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,508 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-15 20:01:51,521 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-15 20:01:51,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:01:51,607 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:01:51,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-15 20:01:51,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 133 places, 134 transitions, 284 flow [2021-10-15 20:01:51,717 INFO L129 PetriNetUnfolder]: 8/132 cut-off events. [2021-10-15 20:01:51,717 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-15 20:01:51,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 132 events. 8/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2021-10-15 20:01:51,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 134 transitions, 284 flow [2021-10-15 20:01:51,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 124 transitions, 260 flow [2021-10-15 20:01:51,808 INFO L129 PetriNetUnfolder]: 8/123 cut-off events. [2021-10-15 20:01:51,808 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-15 20:01:51,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:51,809 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:51,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:51,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:51,815 INFO L82 PathProgramCache]: Analyzing trace with hash -740485796, now seen corresponding path program 1 times [2021-10-15 20:01:51,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:51,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078984787] [2021-10-15 20:01:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:51,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:52,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:52,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078984787] [2021-10-15 20:01:52,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078984787] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:52,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:52,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:01:52,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17454965] [2021-10-15 20:01:52,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:01:52,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:01:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:52,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 134 [2021-10-15 20:01:52,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:52,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:52,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 134 [2021-10-15 20:01:52,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:52,642 INFO L129 PetriNetUnfolder]: 80/438 cut-off events. [2021-10-15 20:01:52,642 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 20:01:52,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 438 events. 80/438 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1983 event pairs, 45 based on Foata normal form. 33/415 useless extension candidates. Maximal degree in co-relation 535. Up to 88 conditions per place. [2021-10-15 20:01:52,655 INFO L132 encePairwiseOnDemand]: 118/134 looper letters, 37 selfloop transitions, 10 changer transitions 3/136 dead transitions. [2021-10-15 20:01:52,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 136 transitions, 384 flow [2021-10-15 20:01:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:01:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:01:52,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2021-10-15 20:01:52,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7835820895522388 [2021-10-15 20:01:52,699 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2021-10-15 20:01:52,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2021-10-15 20:01:52,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:52,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2021-10-15 20:01:52,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:52,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:52,729 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:52,731 INFO L186 Difference]: Start difference. First operand has 123 places, 124 transitions, 260 flow. Second operand 6 states and 630 transitions. [2021-10-15 20:01:52,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 136 transitions, 384 flow [2021-10-15 20:01:52,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 136 transitions, 376 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 20:01:52,746 INFO L242 Difference]: Finished difference. Result has 126 places, 118 transitions, 274 flow [2021-10-15 20:01:52,748 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=126, PETRI_TRANSITIONS=118} [2021-10-15 20:01:52,749 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 3 predicate places. [2021-10-15 20:01:52,750 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 118 transitions, 274 flow [2021-10-15 20:01:52,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:52,751 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:52,752 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:52,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:01:52,753 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:52,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1438365800, now seen corresponding path program 1 times [2021-10-15 20:01:52,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:52,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253099231] [2021-10-15 20:01:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:52,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:52,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:52,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253099231] [2021-10-15 20:01:52,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253099231] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:52,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:52,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:01:52,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226676077] [2021-10-15 20:01:52,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:01:52,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:01:52,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:01:52,892 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 134 [2021-10-15 20:01:52,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 118 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:52,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:52,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 134 [2021-10-15 20:01:52,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:53,126 INFO L129 PetriNetUnfolder]: 138/572 cut-off events. [2021-10-15 20:01:53,126 INFO L130 PetriNetUnfolder]: For 85/93 co-relation queries the response was YES. [2021-10-15 20:01:53,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 572 events. 138/572 cut-off events. For 85/93 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2873 event pairs, 35 based on Foata normal form. 1/519 useless extension candidates. Maximal degree in co-relation 865. Up to 186 conditions per place. [2021-10-15 20:01:53,132 INFO L132 encePairwiseOnDemand]: 122/134 looper letters, 42 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2021-10-15 20:01:53,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 154 transitions, 505 flow [2021-10-15 20:01:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:01:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:01:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2021-10-15 20:01:53,137 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8507462686567164 [2021-10-15 20:01:53,137 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2021-10-15 20:01:53,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2021-10-15 20:01:53,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:53,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2021-10-15 20:01:53,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 134.0) internal successors, (804), 6 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,145 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 134.0) internal successors, (804), 6 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,145 INFO L186 Difference]: Start difference. First operand has 126 places, 118 transitions, 274 flow. Second operand 5 states and 570 transitions. [2021-10-15 20:01:53,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 154 transitions, 505 flow [2021-10-15 20:01:53,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 154 transitions, 490 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 20:01:53,157 INFO L242 Difference]: Finished difference. Result has 129 places, 138 transitions, 444 flow [2021-10-15 20:01:53,158 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=129, PETRI_TRANSITIONS=138} [2021-10-15 20:01:53,159 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 6 predicate places. [2021-10-15 20:01:53,159 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 138 transitions, 444 flow [2021-10-15 20:01:53,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:53,161 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:53,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:01:53,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:53,167 INFO L82 PathProgramCache]: Analyzing trace with hash -618651062, now seen corresponding path program 2 times [2021-10-15 20:01:53,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:53,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10309585] [2021-10-15 20:01:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:53,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:53,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:53,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10309585] [2021-10-15 20:01:53,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10309585] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:53,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:53,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:01:53,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173142080] [2021-10-15 20:01:53,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:01:53,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:53,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:01:53,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:01:53,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 134 [2021-10-15 20:01:53,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 138 transitions, 444 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:53,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 134 [2021-10-15 20:01:53,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:53,479 INFO L129 PetriNetUnfolder]: 129/598 cut-off events. [2021-10-15 20:01:53,480 INFO L130 PetriNetUnfolder]: For 348/478 co-relation queries the response was YES. [2021-10-15 20:01:53,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 598 events. 129/598 cut-off events. For 348/478 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3213 event pairs, 57 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 1117. Up to 246 conditions per place. [2021-10-15 20:01:53,489 INFO L132 encePairwiseOnDemand]: 128/134 looper letters, 48 selfloop transitions, 5 changer transitions 0/147 dead transitions. [2021-10-15 20:01:53,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 584 flow [2021-10-15 20:01:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:01:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:01:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2021-10-15 20:01:53,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8582089552238806 [2021-10-15 20:01:53,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2021-10-15 20:01:53,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2021-10-15 20:01:53,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:53,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2021-10-15 20:01:53,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,497 INFO L186 Difference]: Start difference. First operand has 129 places, 138 transitions, 444 flow. Second operand 3 states and 345 transitions. [2021-10-15 20:01:53,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 584 flow [2021-10-15 20:01:53,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 147 transitions, 584 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:01:53,516 INFO L242 Difference]: Finished difference. Result has 132 places, 142 transitions, 491 flow [2021-10-15 20:01:53,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=491, PETRI_PLACES=132, PETRI_TRANSITIONS=142} [2021-10-15 20:01:53,517 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 9 predicate places. [2021-10-15 20:01:53,517 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 491 flow [2021-10-15 20:01:53,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,518 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:53,518 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:53,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:01:53,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:53,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1804791822, now seen corresponding path program 1 times [2021-10-15 20:01:53,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:53,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960852255] [2021-10-15 20:01:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:53,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:53,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:53,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960852255] [2021-10-15 20:01:53,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960852255] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:53,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:53,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:01:53,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435167238] [2021-10-15 20:01:53,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:01:53,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:01:53,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:53,690 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 134 [2021-10-15 20:01:53,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 491 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:53,691 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 134 [2021-10-15 20:01:53,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:53,869 INFO L129 PetriNetUnfolder]: 78/552 cut-off events. [2021-10-15 20:01:53,870 INFO L130 PetriNetUnfolder]: For 287/327 co-relation queries the response was YES. [2021-10-15 20:01:53,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 552 events. 78/552 cut-off events. For 287/327 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3086 event pairs, 14 based on Foata normal form. 1/520 useless extension candidates. Maximal degree in co-relation 926. Up to 77 conditions per place. [2021-10-15 20:01:53,876 INFO L132 encePairwiseOnDemand]: 127/134 looper letters, 21 selfloop transitions, 9 changer transitions 6/162 dead transitions. [2021-10-15 20:01:53,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 162 transitions, 603 flow [2021-10-15 20:01:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:01:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:01:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1037 transitions. [2021-10-15 20:01:53,881 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8598673300165838 [2021-10-15 20:01:53,882 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1037 transitions. [2021-10-15 20:01:53,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1037 transitions. [2021-10-15 20:01:53,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:53,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1037 transitions. [2021-10-15 20:01:53,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.22222222222223) internal successors, (1037), 9 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,893 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,894 INFO L186 Difference]: Start difference. First operand has 132 places, 142 transitions, 491 flow. Second operand 9 states and 1037 transitions. [2021-10-15 20:01:53,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 162 transitions, 603 flow [2021-10-15 20:01:53,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 162 transitions, 594 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 20:01:53,907 INFO L242 Difference]: Finished difference. Result has 144 places, 148 transitions, 532 flow [2021-10-15 20:01:53,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=144, PETRI_TRANSITIONS=148} [2021-10-15 20:01:53,908 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 21 predicate places. [2021-10-15 20:01:53,908 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 148 transitions, 532 flow [2021-10-15 20:01:53,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:53,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:53,909 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:53,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:01:53,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash 739907804, now seen corresponding path program 1 times [2021-10-15 20:01:53,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:53,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550608487] [2021-10-15 20:01:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:53,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:54,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:54,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550608487] [2021-10-15 20:01:54,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550608487] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:54,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:54,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:01:54,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031993340] [2021-10-15 20:01:54,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:01:54,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:01:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:54,032 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 134 [2021-10-15 20:01:54,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 148 transitions, 532 flow. Second operand has 6 states, 6 states have (on average 104.66666666666667) internal successors, (628), 6 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:54,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 134 [2021-10-15 20:01:54,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:54,378 INFO L129 PetriNetUnfolder]: 188/852 cut-off events. [2021-10-15 20:01:54,379 INFO L130 PetriNetUnfolder]: For 692/741 co-relation queries the response was YES. [2021-10-15 20:01:54,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 852 events. 188/852 cut-off events. For 692/741 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5163 event pairs, 24 based on Foata normal form. 17/832 useless extension candidates. Maximal degree in co-relation 1717. Up to 216 conditions per place. [2021-10-15 20:01:54,412 INFO L132 encePairwiseOnDemand]: 120/134 looper letters, 77 selfloop transitions, 58 changer transitions 0/232 dead transitions. [2021-10-15 20:01:54,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 232 transitions, 1263 flow [2021-10-15 20:01:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:01:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:01:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1005 transitions. [2021-10-15 20:01:54,421 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-10-15 20:01:54,421 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1005 transitions. [2021-10-15 20:01:54,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1005 transitions. [2021-10-15 20:01:54,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:54,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1005 transitions. [2021-10-15 20:01:54,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.66666666666667) internal successors, (1005), 9 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,433 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,434 INFO L186 Difference]: Start difference. First operand has 144 places, 148 transitions, 532 flow. Second operand 9 states and 1005 transitions. [2021-10-15 20:01:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 232 transitions, 1263 flow [2021-10-15 20:01:54,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 232 transitions, 1259 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 20:01:54,450 INFO L242 Difference]: Finished difference. Result has 154 places, 196 transitions, 1103 flow [2021-10-15 20:01:54,451 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1103, PETRI_PLACES=154, PETRI_TRANSITIONS=196} [2021-10-15 20:01:54,451 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 31 predicate places. [2021-10-15 20:01:54,451 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 196 transitions, 1103 flow [2021-10-15 20:01:54,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.66666666666667) internal successors, (628), 6 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,452 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:54,452 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:54,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:01:54,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash 118778624, now seen corresponding path program 2 times [2021-10-15 20:01:54,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:54,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464359099] [2021-10-15 20:01:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:54,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:54,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:54,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464359099] [2021-10-15 20:01:54,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464359099] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:54,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:54,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:01:54,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592692080] [2021-10-15 20:01:54,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:01:54,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:54,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:01:54,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:54,631 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 134 [2021-10-15 20:01:54,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 196 transitions, 1103 flow. Second operand has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:54,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 134 [2021-10-15 20:01:54,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:54,846 INFO L129 PetriNetUnfolder]: 165/802 cut-off events. [2021-10-15 20:01:54,846 INFO L130 PetriNetUnfolder]: For 1288/1476 co-relation queries the response was YES. [2021-10-15 20:01:54,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2161 conditions, 802 events. 165/802 cut-off events. For 1288/1476 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4881 event pairs, 35 based on Foata normal form. 9/765 useless extension candidates. Maximal degree in co-relation 2015. Up to 189 conditions per place. [2021-10-15 20:01:54,859 INFO L132 encePairwiseOnDemand]: 125/134 looper letters, 95 selfloop transitions, 29 changer transitions 0/220 dead transitions. [2021-10-15 20:01:54,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 220 transitions, 1513 flow [2021-10-15 20:01:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:01:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:01:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 618 transitions. [2021-10-15 20:01:54,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7686567164179104 [2021-10-15 20:01:54,863 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 618 transitions. [2021-10-15 20:01:54,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 618 transitions. [2021-10-15 20:01:54,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:54,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 618 transitions. [2021-10-15 20:01:54,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,870 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,871 INFO L186 Difference]: Start difference. First operand has 154 places, 196 transitions, 1103 flow. Second operand 6 states and 618 transitions. [2021-10-15 20:01:54,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 220 transitions, 1513 flow [2021-10-15 20:01:54,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 220 transitions, 1441 flow, removed 36 selfloop flow, removed 0 redundant places. [2021-10-15 20:01:54,894 INFO L242 Difference]: Finished difference. Result has 161 places, 200 transitions, 1170 flow [2021-10-15 20:01:54,894 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1170, PETRI_PLACES=161, PETRI_TRANSITIONS=200} [2021-10-15 20:01:54,894 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 38 predicate places. [2021-10-15 20:01:54,895 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 200 transitions, 1170 flow [2021-10-15 20:01:54,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:54,899 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:54,900 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:54,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:01:54,901 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:54,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:54,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1659097574, now seen corresponding path program 3 times [2021-10-15 20:01:54,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:54,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395471873] [2021-10-15 20:01:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:54,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:55,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:55,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395471873] [2021-10-15 20:01:55,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395471873] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:55,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:55,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-15 20:01:55,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700102838] [2021-10-15 20:01:55,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:01:55,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:01:55,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:01:55,169 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 134 [2021-10-15 20:01:55,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 200 transitions, 1170 flow. Second operand has 12 states, 12 states have (on average 86.0) internal successors, (1032), 12 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:55,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:55,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 134 [2021-10-15 20:01:55,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:56,078 INFO L129 PetriNetUnfolder]: 595/2019 cut-off events. [2021-10-15 20:01:56,078 INFO L130 PetriNetUnfolder]: For 4000/4240 co-relation queries the response was YES. [2021-10-15 20:01:56,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5771 conditions, 2019 events. 595/2019 cut-off events. For 4000/4240 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 15185 event pairs, 113 based on Foata normal form. 39/1965 useless extension candidates. Maximal degree in co-relation 5434. Up to 514 conditions per place. [2021-10-15 20:01:56,106 INFO L132 encePairwiseOnDemand]: 112/134 looper letters, 155 selfloop transitions, 67 changer transitions 66/366 dead transitions. [2021-10-15 20:01:56,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 366 transitions, 2753 flow [2021-10-15 20:01:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:01:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:01:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1849 transitions. [2021-10-15 20:01:56,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6899253731343283 [2021-10-15 20:01:56,115 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1849 transitions. [2021-10-15 20:01:56,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1849 transitions. [2021-10-15 20:01:56,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:56,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1849 transitions. [2021-10-15 20:01:56,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 92.45) internal successors, (1849), 20 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,133 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,133 INFO L186 Difference]: Start difference. First operand has 161 places, 200 transitions, 1170 flow. Second operand 20 states and 1849 transitions. [2021-10-15 20:01:56,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 366 transitions, 2753 flow [2021-10-15 20:01:56,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 366 transitions, 2717 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-10-15 20:01:56,170 INFO L242 Difference]: Finished difference. Result has 191 places, 236 transitions, 1804 flow [2021-10-15 20:01:56,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1804, PETRI_PLACES=191, PETRI_TRANSITIONS=236} [2021-10-15 20:01:56,171 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 68 predicate places. [2021-10-15 20:01:56,171 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 236 transitions, 1804 flow [2021-10-15 20:01:56,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 86.0) internal successors, (1032), 12 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:56,172 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:56,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:01:56,173 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:56,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1848130742, now seen corresponding path program 2 times [2021-10-15 20:01:56,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:56,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398919639] [2021-10-15 20:01:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:56,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:56,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:56,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398919639] [2021-10-15 20:01:56,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398919639] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:56,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:56,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:01:56,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511249185] [2021-10-15 20:01:56,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:01:56,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:56,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:01:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:56,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 134 [2021-10-15 20:01:56,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 236 transitions, 1804 flow. Second operand has 6 states, 6 states have (on average 104.66666666666667) internal successors, (628), 6 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:56,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 134 [2021-10-15 20:01:56,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:56,700 INFO L129 PetriNetUnfolder]: 312/1446 cut-off events. [2021-10-15 20:01:56,700 INFO L130 PetriNetUnfolder]: For 4466/4698 co-relation queries the response was YES. [2021-10-15 20:01:56,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4713 conditions, 1446 events. 312/1446 cut-off events. For 4466/4698 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 10996 event pairs, 18 based on Foata normal form. 58/1487 useless extension candidates. Maximal degree in co-relation 4556. Up to 379 conditions per place. [2021-10-15 20:01:56,750 INFO L132 encePairwiseOnDemand]: 120/134 looper letters, 138 selfloop transitions, 93 changer transitions 4/335 dead transitions. [2021-10-15 20:01:56,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 335 transitions, 3152 flow [2021-10-15 20:01:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:01:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:01:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1004 transitions. [2021-10-15 20:01:56,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8325041459369817 [2021-10-15 20:01:56,755 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1004 transitions. [2021-10-15 20:01:56,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1004 transitions. [2021-10-15 20:01:56,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:56,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1004 transitions. [2021-10-15 20:01:56,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.55555555555556) internal successors, (1004), 9 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,764 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,765 INFO L186 Difference]: Start difference. First operand has 191 places, 236 transitions, 1804 flow. Second operand 9 states and 1004 transitions. [2021-10-15 20:01:56,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 335 transitions, 3152 flow [2021-10-15 20:01:56,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 335 transitions, 3093 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-10-15 20:01:56,812 INFO L242 Difference]: Finished difference. Result has 195 places, 284 transitions, 2638 flow [2021-10-15 20:01:56,813 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2638, PETRI_PLACES=195, PETRI_TRANSITIONS=284} [2021-10-15 20:01:56,813 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 72 predicate places. [2021-10-15 20:01:56,813 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 284 transitions, 2638 flow [2021-10-15 20:01:56,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.66666666666667) internal successors, (628), 6 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:56,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:56,814 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:56,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:01:56,815 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:56,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1110963952, now seen corresponding path program 3 times [2021-10-15 20:01:56,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:56,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683445420] [2021-10-15 20:01:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:56,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:57,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:57,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683445420] [2021-10-15 20:01:57,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683445420] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:57,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:57,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-15 20:01:57,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286671224] [2021-10-15 20:01:57,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:01:57,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:01:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:01:57,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 134 [2021-10-15 20:01:57,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 284 transitions, 2638 flow. Second operand has 11 states, 11 states have (on average 108.63636363636364) internal successors, (1195), 11 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:57,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:57,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 134 [2021-10-15 20:01:57,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:57,528 INFO L129 PetriNetUnfolder]: 224/1390 cut-off events. [2021-10-15 20:01:57,529 INFO L130 PetriNetUnfolder]: For 5358/5510 co-relation queries the response was YES. [2021-10-15 20:01:57,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 1390 events. 224/1390 cut-off events. For 5358/5510 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 10619 event pairs, 4 based on Foata normal form. 34/1409 useless extension candidates. Maximal degree in co-relation 4274. Up to 195 conditions per place. [2021-10-15 20:01:57,548 INFO L132 encePairwiseOnDemand]: 120/134 looper letters, 19 selfloop transitions, 13 changer transitions 17/303 dead transitions. [2021-10-15 20:01:57,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 303 transitions, 2750 flow [2021-10-15 20:01:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:01:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:01:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1322 transitions. [2021-10-15 20:01:57,554 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.822139303482587 [2021-10-15 20:01:57,555 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1322 transitions. [2021-10-15 20:01:57,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1322 transitions. [2021-10-15 20:01:57,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:57,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1322 transitions. [2021-10-15 20:01:57,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.16666666666667) internal successors, (1322), 12 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:57,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 134.0) internal successors, (1742), 13 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:57,566 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 134.0) internal successors, (1742), 13 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:57,566 INFO L186 Difference]: Start difference. First operand has 195 places, 284 transitions, 2638 flow. Second operand 12 states and 1322 transitions. [2021-10-15 20:01:57,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 303 transitions, 2750 flow [2021-10-15 20:01:57,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 303 transitions, 2640 flow, removed 55 selfloop flow, removed 0 redundant places. [2021-10-15 20:01:57,620 INFO L242 Difference]: Finished difference. Result has 209 places, 277 transitions, 2424 flow [2021-10-15 20:01:57,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2424, PETRI_PLACES=209, PETRI_TRANSITIONS=277} [2021-10-15 20:01:57,621 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 86 predicate places. [2021-10-15 20:01:57,621 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 277 transitions, 2424 flow [2021-10-15 20:01:57,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.63636363636364) internal successors, (1195), 11 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:57,622 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:57,622 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:57,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:01:57,623 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1732363554, now seen corresponding path program 4 times [2021-10-15 20:01:57,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:57,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915321372] [2021-10-15 20:01:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:57,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:57,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:57,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915321372] [2021-10-15 20:01:57,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915321372] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:57,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:57,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:01:57,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197198977] [2021-10-15 20:01:57,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:01:57,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:01:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:57,730 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 134 [2021-10-15 20:01:57,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 277 transitions, 2424 flow. Second operand has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:57,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:57,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 134 [2021-10-15 20:01:57,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:58,038 INFO L129 PetriNetUnfolder]: 168/820 cut-off events. [2021-10-15 20:01:58,038 INFO L130 PetriNetUnfolder]: For 3864/4238 co-relation queries the response was YES. [2021-10-15 20:01:58,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2940 conditions, 820 events. 168/820 cut-off events. For 3864/4238 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4607 event pairs, 19 based on Foata normal form. 47/855 useless extension candidates. Maximal degree in co-relation 2896. Up to 244 conditions per place. [2021-10-15 20:01:58,053 INFO L132 encePairwiseOnDemand]: 120/134 looper letters, 89 selfloop transitions, 46 changer transitions 1/232 dead transitions. [2021-10-15 20:01:58,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 232 transitions, 2005 flow [2021-10-15 20:01:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:01:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:01:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 710 transitions. [2021-10-15 20:01:58,057 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7569296375266524 [2021-10-15 20:01:58,057 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 710 transitions. [2021-10-15 20:01:58,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 710 transitions. [2021-10-15 20:01:58,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:58,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 710 transitions. [2021-10-15 20:01:58,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 134.0) internal successors, (1072), 8 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,064 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 134.0) internal successors, (1072), 8 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,065 INFO L186 Difference]: Start difference. First operand has 209 places, 277 transitions, 2424 flow. Second operand 7 states and 710 transitions. [2021-10-15 20:01:58,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 232 transitions, 2005 flow [2021-10-15 20:01:58,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 232 transitions, 1722 flow, removed 65 selfloop flow, removed 19 redundant places. [2021-10-15 20:01:58,097 INFO L242 Difference]: Finished difference. Result has 183 places, 213 transitions, 1504 flow [2021-10-15 20:01:58,098 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1504, PETRI_PLACES=183, PETRI_TRANSITIONS=213} [2021-10-15 20:01:58,099 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 60 predicate places. [2021-10-15 20:01:58,099 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 213 transitions, 1504 flow [2021-10-15 20:01:58,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,100 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:58,100 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:58,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:01:58,101 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:58,103 INFO L82 PathProgramCache]: Analyzing trace with hash -248933028, now seen corresponding path program 4 times [2021-10-15 20:01:58,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:58,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357880308] [2021-10-15 20:01:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:58,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:58,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:58,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357880308] [2021-10-15 20:01:58,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357880308] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:58,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:58,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:01:58,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253580975] [2021-10-15 20:01:58,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:01:58,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:01:58,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:58,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 134 [2021-10-15 20:01:58,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 213 transitions, 1504 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:58,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 134 [2021-10-15 20:01:58,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:58,415 INFO L129 PetriNetUnfolder]: 129/887 cut-off events. [2021-10-15 20:01:58,415 INFO L130 PetriNetUnfolder]: For 2058/2100 co-relation queries the response was YES. [2021-10-15 20:01:58,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2628 conditions, 887 events. 129/887 cut-off events. For 2058/2100 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5527 event pairs, 1 based on Foata normal form. 9/886 useless extension candidates. Maximal degree in co-relation 2595. Up to 94 conditions per place. [2021-10-15 20:01:58,427 INFO L132 encePairwiseOnDemand]: 127/134 looper letters, 22 selfloop transitions, 4 changer transitions 11/232 dead transitions. [2021-10-15 20:01:58,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 232 transitions, 1597 flow [2021-10-15 20:01:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:01:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:01:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1038 transitions. [2021-10-15 20:01:58,432 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8606965174129353 [2021-10-15 20:01:58,432 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1038 transitions. [2021-10-15 20:01:58,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1038 transitions. [2021-10-15 20:01:58,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:58,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1038 transitions. [2021-10-15 20:01:58,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,442 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,442 INFO L186 Difference]: Start difference. First operand has 183 places, 213 transitions, 1504 flow. Second operand 9 states and 1038 transitions. [2021-10-15 20:01:58,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 232 transitions, 1597 flow [2021-10-15 20:01:58,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 232 transitions, 1573 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-10-15 20:01:58,470 INFO L242 Difference]: Finished difference. Result has 194 places, 212 transitions, 1477 flow [2021-10-15 20:01:58,471 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1477, PETRI_PLACES=194, PETRI_TRANSITIONS=212} [2021-10-15 20:01:58,471 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 71 predicate places. [2021-10-15 20:01:58,471 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 212 transitions, 1477 flow [2021-10-15 20:01:58,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,472 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:58,472 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:58,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 20:01:58,473 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1391369262, now seen corresponding path program 5 times [2021-10-15 20:01:58,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:58,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126750816] [2021-10-15 20:01:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:58,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:58,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:58,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126750816] [2021-10-15 20:01:58,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126750816] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:58,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:58,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:01:58,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543934712] [2021-10-15 20:01:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:01:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:01:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:01:58,725 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:01:58,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 212 transitions, 1477 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:58,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:01:58,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:01:58,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:01:59,734 INFO L129 PetriNetUnfolder]: 397/1297 cut-off events. [2021-10-15 20:01:59,734 INFO L130 PetriNetUnfolder]: For 4200/4234 co-relation queries the response was YES. [2021-10-15 20:01:59,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4896 conditions, 1297 events. 397/1297 cut-off events. For 4200/4234 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7917 event pairs, 56 based on Foata normal form. 11/1275 useless extension candidates. Maximal degree in co-relation 4857. Up to 334 conditions per place. [2021-10-15 20:01:59,754 INFO L132 encePairwiseOnDemand]: 108/134 looper letters, 134 selfloop transitions, 88 changer transitions 70/371 dead transitions. [2021-10-15 20:01:59,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 371 transitions, 3088 flow [2021-10-15 20:01:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-15 20:01:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-15 20:01:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2508 transitions. [2021-10-15 20:01:59,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6453937210499228 [2021-10-15 20:01:59,767 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2508 transitions. [2021-10-15 20:01:59,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2508 transitions. [2021-10-15 20:01:59,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:01:59,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2508 transitions. [2021-10-15 20:01:59,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 86.48275862068965) internal successors, (2508), 29 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:59,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 134.0) internal successors, (4020), 30 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:59,792 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 134.0) internal successors, (4020), 30 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:59,792 INFO L186 Difference]: Start difference. First operand has 194 places, 212 transitions, 1477 flow. Second operand 29 states and 2508 transitions. [2021-10-15 20:01:59,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 371 transitions, 3088 flow [2021-10-15 20:01:59,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 371 transitions, 3062 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-10-15 20:01:59,828 INFO L242 Difference]: Finished difference. Result has 230 places, 241 transitions, 2012 flow [2021-10-15 20:01:59,829 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2012, PETRI_PLACES=230, PETRI_TRANSITIONS=241} [2021-10-15 20:01:59,829 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 107 predicate places. [2021-10-15 20:01:59,829 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 241 transitions, 2012 flow [2021-10-15 20:01:59,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:01:59,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:01:59,830 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:59,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 20:01:59,831 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:01:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:59,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1780041454, now seen corresponding path program 6 times [2021-10-15 20:01:59,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:59,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745820380] [2021-10-15 20:01:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:59,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:00,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:00,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745820380] [2021-10-15 20:02:00,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745820380] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:00,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:00,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:00,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033978840] [2021-10-15 20:02:00,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:00,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:00,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:00,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 241 transitions, 2012 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:00,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:00,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:00,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:01,097 INFO L129 PetriNetUnfolder]: 382/1403 cut-off events. [2021-10-15 20:02:01,097 INFO L130 PetriNetUnfolder]: For 6455/6493 co-relation queries the response was YES. [2021-10-15 20:02:01,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5800 conditions, 1403 events. 382/1403 cut-off events. For 6455/6493 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9280 event pairs, 80 based on Foata normal form. 8/1372 useless extension candidates. Maximal degree in co-relation 5748. Up to 394 conditions per place. [2021-10-15 20:02:01,124 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 176 selfloop transitions, 80 changer transitions 36/371 dead transitions. [2021-10-15 20:02:01,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 371 transitions, 3670 flow [2021-10-15 20:02:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:02:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:02:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1902 transitions. [2021-10-15 20:02:01,130 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6451831750339213 [2021-10-15 20:02:01,130 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1902 transitions. [2021-10-15 20:02:01,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1902 transitions. [2021-10-15 20:02:01,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:01,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1902 transitions. [2021-10-15 20:02:01,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.45454545454545) internal successors, (1902), 22 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:01,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:01,168 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:01,168 INFO L186 Difference]: Start difference. First operand has 230 places, 241 transitions, 2012 flow. Second operand 22 states and 1902 transitions. [2021-10-15 20:02:01,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 371 transitions, 3670 flow [2021-10-15 20:02:01,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 371 transitions, 3546 flow, removed 58 selfloop flow, removed 14 redundant places. [2021-10-15 20:02:01,243 INFO L242 Difference]: Finished difference. Result has 236 places, 276 transitions, 2770 flow [2021-10-15 20:02:01,244 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2770, PETRI_PLACES=236, PETRI_TRANSITIONS=276} [2021-10-15 20:02:01,244 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 113 predicate places. [2021-10-15 20:02:01,244 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 276 transitions, 2770 flow [2021-10-15 20:02:01,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:01,246 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:01,246 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:01,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:02:01,247 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1061128652, now seen corresponding path program 7 times [2021-10-15 20:02:01,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:01,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410624341] [2021-10-15 20:02:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:01,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:01,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:01,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410624341] [2021-10-15 20:02:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410624341] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:01,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:01,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-15 20:02:01,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639150386] [2021-10-15 20:02:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:02:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:02:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:02:01,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:01,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 276 transitions, 2770 flow. Second operand has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:01,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:01,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:01,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:02,468 INFO L129 PetriNetUnfolder]: 390/1469 cut-off events. [2021-10-15 20:02:02,468 INFO L130 PetriNetUnfolder]: For 10373/10415 co-relation queries the response was YES. [2021-10-15 20:02:02,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 1469 events. 390/1469 cut-off events. For 10373/10415 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 9984 event pairs, 114 based on Foata normal form. 5/1429 useless extension candidates. Maximal degree in co-relation 6737. Up to 699 conditions per place. [2021-10-15 20:02:02,503 INFO L132 encePairwiseOnDemand]: 113/134 looper letters, 176 selfloop transitions, 44 changer transitions 52/351 dead transitions. [2021-10-15 20:02:02,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 351 transitions, 4054 flow [2021-10-15 20:02:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1793 transitions. [2021-10-15 20:02:02,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6371712864250177 [2021-10-15 20:02:02,508 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1793 transitions. [2021-10-15 20:02:02,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1793 transitions. [2021-10-15 20:02:02,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:02,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1793 transitions. [2021-10-15 20:02:02,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:02,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:02,519 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:02,520 INFO L186 Difference]: Start difference. First operand has 236 places, 276 transitions, 2770 flow. Second operand 21 states and 1793 transitions. [2021-10-15 20:02:02,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 351 transitions, 4054 flow [2021-10-15 20:02:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 351 transitions, 3946 flow, removed 52 selfloop flow, removed 9 redundant places. [2021-10-15 20:02:02,656 INFO L242 Difference]: Finished difference. Result has 254 places, 286 transitions, 3098 flow [2021-10-15 20:02:02,657 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3098, PETRI_PLACES=254, PETRI_TRANSITIONS=286} [2021-10-15 20:02:02,657 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 131 predicate places. [2021-10-15 20:02:02,657 INFO L470 AbstractCegarLoop]: Abstraction has has 254 places, 286 transitions, 3098 flow [2021-10-15 20:02:02,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:02,658 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:02,658 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:02,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 20:02:02,659 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1913299724, now seen corresponding path program 8 times [2021-10-15 20:02:02,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:02,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354842827] [2021-10-15 20:02:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:02,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:02,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:02,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354842827] [2021-10-15 20:02:02,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354842827] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:02,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:02,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:02,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783287486] [2021-10-15 20:02:02,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:02,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:02,967 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:02,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 286 transitions, 3098 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:02,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:02,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:02,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:04,116 INFO L129 PetriNetUnfolder]: 418/1526 cut-off events. [2021-10-15 20:02:04,116 INFO L130 PetriNetUnfolder]: For 13831/13894 co-relation queries the response was YES. [2021-10-15 20:02:04,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7675 conditions, 1526 events. 418/1526 cut-off events. For 13831/13894 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 10468 event pairs, 82 based on Foata normal form. 16/1490 useless extension candidates. Maximal degree in co-relation 7603. Up to 469 conditions per place. [2021-10-15 20:02:04,142 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 184 selfloop transitions, 95 changer transitions 35/393 dead transitions. [2021-10-15 20:02:04,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 393 transitions, 4895 flow [2021-10-15 20:02:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 20:02:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-15 20:02:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1981 transitions. [2021-10-15 20:02:04,150 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427644386761843 [2021-10-15 20:02:04,151 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1981 transitions. [2021-10-15 20:02:04,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1981 transitions. [2021-10-15 20:02:04,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:04,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1981 transitions. [2021-10-15 20:02:04,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 86.1304347826087) internal successors, (1981), 23 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:04,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:04,169 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:04,170 INFO L186 Difference]: Start difference. First operand has 254 places, 286 transitions, 3098 flow. Second operand 23 states and 1981 transitions. [2021-10-15 20:02:04,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 393 transitions, 4895 flow [2021-10-15 20:02:04,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 393 transitions, 4654 flow, removed 89 selfloop flow, removed 14 redundant places. [2021-10-15 20:02:04,287 INFO L242 Difference]: Finished difference. Result has 271 places, 307 transitions, 3761 flow [2021-10-15 20:02:04,288 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3761, PETRI_PLACES=271, PETRI_TRANSITIONS=307} [2021-10-15 20:02:04,288 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 148 predicate places. [2021-10-15 20:02:04,288 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 307 transitions, 3761 flow [2021-10-15 20:02:04,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:04,289 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:04,289 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:04,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:02:04,290 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1110683076, now seen corresponding path program 9 times [2021-10-15 20:02:04,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:04,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217047402] [2021-10-15 20:02:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:04,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:04,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:04,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217047402] [2021-10-15 20:02:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217047402] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:04,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:04,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-15 20:02:04,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207104899] [2021-10-15 20:02:04,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:02:04,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:02:04,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:02:04,536 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:04,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 307 transitions, 3761 flow. Second operand has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:04,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:04,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:04,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:05,521 INFO L129 PetriNetUnfolder]: 465/1702 cut-off events. [2021-10-15 20:02:05,521 INFO L130 PetriNetUnfolder]: For 19241/19355 co-relation queries the response was YES. [2021-10-15 20:02:05,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8938 conditions, 1702 events. 465/1702 cut-off events. For 19241/19355 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 12127 event pairs, 110 based on Foata normal form. 6/1647 useless extension candidates. Maximal degree in co-relation 8858. Up to 493 conditions per place. [2021-10-15 20:02:05,545 INFO L132 encePairwiseOnDemand]: 113/134 looper letters, 227 selfloop transitions, 67 changer transitions 23/396 dead transitions. [2021-10-15 20:02:05,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 396 transitions, 5337 flow [2021-10-15 20:02:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:02:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:02:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1634 transitions. [2021-10-15 20:02:05,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6417910447761194 [2021-10-15 20:02:05,549 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1634 transitions. [2021-10-15 20:02:05,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1634 transitions. [2021-10-15 20:02:05,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:05,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1634 transitions. [2021-10-15 20:02:05,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:05,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:05,559 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:05,559 INFO L186 Difference]: Start difference. First operand has 271 places, 307 transitions, 3761 flow. Second operand 19 states and 1634 transitions. [2021-10-15 20:02:05,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 396 transitions, 5337 flow [2021-10-15 20:02:05,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 396 transitions, 5164 flow, removed 75 selfloop flow, removed 12 redundant places. [2021-10-15 20:02:05,749 INFO L242 Difference]: Finished difference. Result has 280 places, 326 transitions, 4252 flow [2021-10-15 20:02:05,749 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4252, PETRI_PLACES=280, PETRI_TRANSITIONS=326} [2021-10-15 20:02:05,750 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 157 predicate places. [2021-10-15 20:02:05,750 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 326 transitions, 4252 flow [2021-10-15 20:02:05,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:05,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:05,751 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:05,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:02:05,751 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1271016000, now seen corresponding path program 10 times [2021-10-15 20:02:05,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:05,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275082983] [2021-10-15 20:02:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:05,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:05,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:05,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275082983] [2021-10-15 20:02:05,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275082983] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:05,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:05,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-15 20:02:05,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555829270] [2021-10-15 20:02:05,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:02:05,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:02:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:02:06,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:06,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 326 transitions, 4252 flow. Second operand has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:06,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:06,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:06,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:07,034 INFO L129 PetriNetUnfolder]: 509/1895 cut-off events. [2021-10-15 20:02:07,034 INFO L130 PetriNetUnfolder]: For 24847/24939 co-relation queries the response was YES. [2021-10-15 20:02:07,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10313 conditions, 1895 events. 509/1895 cut-off events. For 24847/24939 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 14091 event pairs, 151 based on Foata normal form. 11/1831 useless extension candidates. Maximal degree in co-relation 10229. Up to 874 conditions per place. [2021-10-15 20:02:07,067 INFO L132 encePairwiseOnDemand]: 115/134 looper letters, 197 selfloop transitions, 79 changer transitions 59/414 dead transitions. [2021-10-15 20:02:07,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 414 transitions, 6151 flow [2021-10-15 20:02:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1788 transitions. [2021-10-15 20:02:07,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6353944562899787 [2021-10-15 20:02:07,072 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1788 transitions. [2021-10-15 20:02:07,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1788 transitions. [2021-10-15 20:02:07,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:07,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1788 transitions. [2021-10-15 20:02:07,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.14285714285714) internal successors, (1788), 21 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:07,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:07,083 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:07,083 INFO L186 Difference]: Start difference. First operand has 280 places, 326 transitions, 4252 flow. Second operand 21 states and 1788 transitions. [2021-10-15 20:02:07,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 414 transitions, 6151 flow [2021-10-15 20:02:07,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 414 transitions, 5994 flow, removed 73 selfloop flow, removed 12 redundant places. [2021-10-15 20:02:07,249 INFO L242 Difference]: Finished difference. Result has 292 places, 339 transitions, 4701 flow [2021-10-15 20:02:07,250 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4142, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4701, PETRI_PLACES=292, PETRI_TRANSITIONS=339} [2021-10-15 20:02:07,250 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 169 predicate places. [2021-10-15 20:02:07,250 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 339 transitions, 4701 flow [2021-10-15 20:02:07,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:07,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:07,251 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:07,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 20:02:07,251 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:07,251 INFO L82 PathProgramCache]: Analyzing trace with hash 81554706, now seen corresponding path program 11 times [2021-10-15 20:02:07,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:07,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738426089] [2021-10-15 20:02:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:07,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:07,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:07,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738426089] [2021-10-15 20:02:07,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738426089] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:07,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:07,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:07,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980599019] [2021-10-15 20:02:07,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:07,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:07,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:07,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:07,476 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:07,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 339 transitions, 4701 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:07,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:07,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:07,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:08,534 INFO L129 PetriNetUnfolder]: 483/1754 cut-off events. [2021-10-15 20:02:08,534 INFO L130 PetriNetUnfolder]: For 24935/25042 co-relation queries the response was YES. [2021-10-15 20:02:08,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10195 conditions, 1754 events. 483/1754 cut-off events. For 24935/25042 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 12590 event pairs, 102 based on Foata normal form. 14/1716 useless extension candidates. Maximal degree in co-relation 10107. Up to 655 conditions per place. [2021-10-15 20:02:08,568 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 213 selfloop transitions, 123 changer transitions 25/440 dead transitions. [2021-10-15 20:02:08,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 440 transitions, 6529 flow [2021-10-15 20:02:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 20:02:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-15 20:02:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1986 transitions. [2021-10-15 20:02:08,572 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6443867618429591 [2021-10-15 20:02:08,572 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1986 transitions. [2021-10-15 20:02:08,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1986 transitions. [2021-10-15 20:02:08,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:08,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1986 transitions. [2021-10-15 20:02:08,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 86.34782608695652) internal successors, (1986), 23 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:08,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:08,583 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:08,583 INFO L186 Difference]: Start difference. First operand has 292 places, 339 transitions, 4701 flow. Second operand 23 states and 1986 transitions. [2021-10-15 20:02:08,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 440 transitions, 6529 flow [2021-10-15 20:02:08,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 440 transitions, 6065 flow, removed 136 selfloop flow, removed 17 redundant places. [2021-10-15 20:02:08,824 INFO L242 Difference]: Finished difference. Result has 297 places, 365 transitions, 5132 flow [2021-10-15 20:02:08,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5132, PETRI_PLACES=297, PETRI_TRANSITIONS=365} [2021-10-15 20:02:08,825 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 174 predicate places. [2021-10-15 20:02:08,825 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 365 transitions, 5132 flow [2021-10-15 20:02:08,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:08,826 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:08,826 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:08,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 20:02:08,827 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:08,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1182810150, now seen corresponding path program 12 times [2021-10-15 20:02:08,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:08,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229971400] [2021-10-15 20:02:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:08,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:09,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:09,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229971400] [2021-10-15 20:02:09,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229971400] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:09,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:09,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-15 20:02:09,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977670721] [2021-10-15 20:02:09,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:02:09,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:02:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:02:09,063 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:09,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 365 transitions, 5132 flow. Second operand has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:09,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:09,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:09,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:09,914 INFO L129 PetriNetUnfolder]: 333/1269 cut-off events. [2021-10-15 20:02:09,914 INFO L130 PetriNetUnfolder]: For 17772/17825 co-relation queries the response was YES. [2021-10-15 20:02:09,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7382 conditions, 1269 events. 333/1269 cut-off events. For 17772/17825 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 8099 event pairs, 101 based on Foata normal form. 15/1247 useless extension candidates. Maximal degree in co-relation 7287. Up to 531 conditions per place. [2021-10-15 20:02:09,937 INFO L132 encePairwiseOnDemand]: 115/134 looper letters, 137 selfloop transitions, 116 changer transitions 55/385 dead transitions. [2021-10-15 20:02:09,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 385 transitions, 5906 flow [2021-10-15 20:02:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:02:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:02:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1869 transitions. [2021-10-15 20:02:09,949 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6339891451831751 [2021-10-15 20:02:09,950 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1869 transitions. [2021-10-15 20:02:09,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1869 transitions. [2021-10-15 20:02:09,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:09,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1869 transitions. [2021-10-15 20:02:09,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 84.95454545454545) internal successors, (1869), 22 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:09,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:09,963 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:09,963 INFO L186 Difference]: Start difference. First operand has 297 places, 365 transitions, 5132 flow. Second operand 22 states and 1869 transitions. [2021-10-15 20:02:09,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 385 transitions, 5906 flow [2021-10-15 20:02:10,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 385 transitions, 5452 flow, removed 117 selfloop flow, removed 23 redundant places. [2021-10-15 20:02:10,116 INFO L242 Difference]: Finished difference. Result has 296 places, 323 transitions, 4458 flow [2021-10-15 20:02:10,116 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4458, PETRI_PLACES=296, PETRI_TRANSITIONS=323} [2021-10-15 20:02:10,117 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 173 predicate places. [2021-10-15 20:02:10,117 INFO L470 AbstractCegarLoop]: Abstraction has has 296 places, 323 transitions, 4458 flow [2021-10-15 20:02:10,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:10,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:10,118 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:10,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 20:02:10,118 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1220374618, now seen corresponding path program 13 times [2021-10-15 20:02:10,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:10,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844595697] [2021-10-15 20:02:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:10,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:10,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:10,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844595697] [2021-10-15 20:02:10,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844595697] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:10,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:10,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:10,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384654391] [2021-10-15 20:02:10,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:10,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:10,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:10,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 323 transitions, 4458 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:10,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:10,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:10,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:11,311 INFO L129 PetriNetUnfolder]: 343/1246 cut-off events. [2021-10-15 20:02:11,311 INFO L130 PetriNetUnfolder]: For 15657/15782 co-relation queries the response was YES. [2021-10-15 20:02:11,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7283 conditions, 1246 events. 343/1246 cut-off events. For 15657/15782 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7769 event pairs, 75 based on Foata normal form. 17/1214 useless extension candidates. Maximal degree in co-relation 7194. Up to 373 conditions per place. [2021-10-15 20:02:11,329 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 176 selfloop transitions, 123 changer transitions 24/400 dead transitions. [2021-10-15 20:02:11,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 400 transitions, 5981 flow [2021-10-15 20:02:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-15 20:02:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-15 20:02:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2228 transitions. [2021-10-15 20:02:11,352 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6394948335246843 [2021-10-15 20:02:11,352 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2228 transitions. [2021-10-15 20:02:11,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2228 transitions. [2021-10-15 20:02:11,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:11,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2228 transitions. [2021-10-15 20:02:11,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 85.6923076923077) internal successors, (2228), 26 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:11,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 134.0) internal successors, (3618), 27 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:11,363 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 134.0) internal successors, (3618), 27 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:11,363 INFO L186 Difference]: Start difference. First operand has 296 places, 323 transitions, 4458 flow. Second operand 26 states and 2228 transitions. [2021-10-15 20:02:11,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 400 transitions, 5981 flow [2021-10-15 20:02:11,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 400 transitions, 5571 flow, removed 193 selfloop flow, removed 14 redundant places. [2021-10-15 20:02:11,501 INFO L242 Difference]: Finished difference. Result has 307 places, 330 transitions, 4736 flow [2021-10-15 20:02:11,502 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4736, PETRI_PLACES=307, PETRI_TRANSITIONS=330} [2021-10-15 20:02:11,502 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 184 predicate places. [2021-10-15 20:02:11,503 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 330 transitions, 4736 flow [2021-10-15 20:02:11,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:11,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:11,503 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:11,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 20:02:11,506 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash 352889314, now seen corresponding path program 14 times [2021-10-15 20:02:11,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:11,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308584424] [2021-10-15 20:02:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:11,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:11,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:11,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308584424] [2021-10-15 20:02:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308584424] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:11,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:11,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760600029] [2021-10-15 20:02:11,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:11,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:11,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 330 transitions, 4736 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:11,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:11,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:11,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:13,070 INFO L129 PetriNetUnfolder]: 319/1183 cut-off events. [2021-10-15 20:02:13,071 INFO L130 PetriNetUnfolder]: For 17596/17687 co-relation queries the response was YES. [2021-10-15 20:02:13,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7199 conditions, 1183 events. 319/1183 cut-off events. For 17596/17687 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7176 event pairs, 99 based on Foata normal form. 29/1169 useless extension candidates. Maximal degree in co-relation 7110. Up to 586 conditions per place. [2021-10-15 20:02:13,086 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 182 selfloop transitions, 108 changer transitions 30/397 dead transitions. [2021-10-15 20:02:13,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 397 transitions, 6294 flow [2021-10-15 20:02:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-15 20:02:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-15 20:02:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2709 transitions. [2021-10-15 20:02:13,091 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6317630597014925 [2021-10-15 20:02:13,091 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2709 transitions. [2021-10-15 20:02:13,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2709 transitions. [2021-10-15 20:02:13,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:13,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2709 transitions. [2021-10-15 20:02:13,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 84.65625) internal successors, (2709), 32 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:13,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 134.0) internal successors, (4422), 33 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:13,106 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 134.0) internal successors, (4422), 33 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:13,106 INFO L186 Difference]: Start difference. First operand has 307 places, 330 transitions, 4736 flow. Second operand 32 states and 2709 transitions. [2021-10-15 20:02:13,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 397 transitions, 6294 flow [2021-10-15 20:02:13,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 397 transitions, 5970 flow, removed 57 selfloop flow, removed 19 redundant places. [2021-10-15 20:02:13,267 INFO L242 Difference]: Finished difference. Result has 319 places, 337 transitions, 5040 flow [2021-10-15 20:02:13,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5040, PETRI_PLACES=319, PETRI_TRANSITIONS=337} [2021-10-15 20:02:13,268 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 196 predicate places. [2021-10-15 20:02:13,269 INFO L470 AbstractCegarLoop]: Abstraction has has 319 places, 337 transitions, 5040 flow [2021-10-15 20:02:13,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:13,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:13,270 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:13,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-15 20:02:13,270 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash -116951390, now seen corresponding path program 15 times [2021-10-15 20:02:13,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:13,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727659061] [2021-10-15 20:02:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:13,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:13,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:13,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727659061] [2021-10-15 20:02:13,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727659061] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:13,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:13,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:13,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863480586] [2021-10-15 20:02:13,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:13,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:13,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:13,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:13,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 337 transitions, 5040 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:13,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:13,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:13,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:14,242 INFO L129 PetriNetUnfolder]: 327/1319 cut-off events. [2021-10-15 20:02:14,243 INFO L130 PetriNetUnfolder]: For 17895/18002 co-relation queries the response was YES. [2021-10-15 20:02:14,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7527 conditions, 1319 events. 327/1319 cut-off events. For 17895/18002 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8650 event pairs, 60 based on Foata normal form. 15/1291 useless extension candidates. Maximal degree in co-relation 7436. Up to 305 conditions per place. [2021-10-15 20:02:14,260 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 182 selfloop transitions, 127 changer transitions 34/420 dead transitions. [2021-10-15 20:02:14,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 420 transitions, 6570 flow [2021-10-15 20:02:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 20:02:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-15 20:02:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1994 transitions. [2021-10-15 20:02:14,263 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6469824789097989 [2021-10-15 20:02:14,263 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1994 transitions. [2021-10-15 20:02:14,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1994 transitions. [2021-10-15 20:02:14,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:14,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1994 transitions. [2021-10-15 20:02:14,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 86.69565217391305) internal successors, (1994), 23 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,271 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,271 INFO L186 Difference]: Start difference. First operand has 319 places, 337 transitions, 5040 flow. Second operand 23 states and 1994 transitions. [2021-10-15 20:02:14,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 420 transitions, 6570 flow [2021-10-15 20:02:14,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 420 transitions, 5968 flow, removed 75 selfloop flow, removed 26 redundant places. [2021-10-15 20:02:14,436 INFO L242 Difference]: Finished difference. Result has 312 places, 336 transitions, 4887 flow [2021-10-15 20:02:14,436 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4887, PETRI_PLACES=312, PETRI_TRANSITIONS=336} [2021-10-15 20:02:14,436 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 189 predicate places. [2021-10-15 20:02:14,436 INFO L470 AbstractCegarLoop]: Abstraction has has 312 places, 336 transitions, 4887 flow [2021-10-15 20:02:14,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,437 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:14,437 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:14,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-15 20:02:14,437 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:14,438 INFO L82 PathProgramCache]: Analyzing trace with hash 39859370, now seen corresponding path program 16 times [2021-10-15 20:02:14,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:14,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651071248] [2021-10-15 20:02:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:14,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:14,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:14,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651071248] [2021-10-15 20:02:14,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651071248] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:14,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:14,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-15 20:02:14,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276821914] [2021-10-15 20:02:14,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:02:14,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:02:14,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:02:14,590 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 134 [2021-10-15 20:02:14,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 336 transitions, 4887 flow. Second operand has 11 states, 11 states have (on average 108.63636363636364) internal successors, (1195), 11 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:14,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 134 [2021-10-15 20:02:14,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:14,892 INFO L129 PetriNetUnfolder]: 161/828 cut-off events. [2021-10-15 20:02:14,892 INFO L130 PetriNetUnfolder]: For 10717/10814 co-relation queries the response was YES. [2021-10-15 20:02:14,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 828 events. 161/828 cut-off events. For 10717/10814 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4663 event pairs, 6 based on Foata normal form. 9/830 useless extension candidates. Maximal degree in co-relation 4648. Up to 116 conditions per place. [2021-10-15 20:02:14,905 INFO L132 encePairwiseOnDemand]: 120/134 looper letters, 13 selfloop transitions, 13 changer transitions 30/345 dead transitions. [2021-10-15 20:02:14,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 345 transitions, 4975 flow [2021-10-15 20:02:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:02:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:02:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1316 transitions. [2021-10-15 20:02:14,907 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.818407960199005 [2021-10-15 20:02:14,907 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1316 transitions. [2021-10-15 20:02:14,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1316 transitions. [2021-10-15 20:02:14,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:14,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1316 transitions. [2021-10-15 20:02:14,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.66666666666667) internal successors, (1316), 12 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 134.0) internal successors, (1742), 13 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,911 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 134.0) internal successors, (1742), 13 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,911 INFO L186 Difference]: Start difference. First operand has 312 places, 336 transitions, 4887 flow. Second operand 12 states and 1316 transitions. [2021-10-15 20:02:14,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 345 transitions, 4975 flow [2021-10-15 20:02:14,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 345 transitions, 4690 flow, removed 32 selfloop flow, removed 22 redundant places. [2021-10-15 20:02:14,984 INFO L242 Difference]: Finished difference. Result has 293 places, 310 transitions, 4166 flow [2021-10-15 20:02:14,985 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4166, PETRI_PLACES=293, PETRI_TRANSITIONS=310} [2021-10-15 20:02:14,985 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 170 predicate places. [2021-10-15 20:02:14,985 INFO L470 AbstractCegarLoop]: Abstraction has has 293 places, 310 transitions, 4166 flow [2021-10-15 20:02:14,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.63636363636364) internal successors, (1195), 11 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:14,986 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:14,986 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:14,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-15 20:02:14,986 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:14,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash -553850134, now seen corresponding path program 17 times [2021-10-15 20:02:14,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:14,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573248440] [2021-10-15 20:02:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:14,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:15,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:15,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573248440] [2021-10-15 20:02:15,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573248440] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:15,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:15,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-15 20:02:15,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855520411] [2021-10-15 20:02:15,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:02:15,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:02:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:02:15,148 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:15,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 310 transitions, 4166 flow. Second operand has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:15,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:15,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:15,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:15,775 INFO L129 PetriNetUnfolder]: 253/1025 cut-off events. [2021-10-15 20:02:15,775 INFO L130 PetriNetUnfolder]: For 8933/8972 co-relation queries the response was YES. [2021-10-15 20:02:15,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5478 conditions, 1025 events. 253/1025 cut-off events. For 8933/8972 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 6109 event pairs, 48 based on Foata normal form. 8/1018 useless extension candidates. Maximal degree in co-relation 5396. Up to 260 conditions per place. [2021-10-15 20:02:15,792 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 161 selfloop transitions, 110 changer transitions 28/374 dead transitions. [2021-10-15 20:02:15,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 374 transitions, 5201 flow [2021-10-15 20:02:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1809 transitions. [2021-10-15 20:02:15,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2021-10-15 20:02:15,801 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1809 transitions. [2021-10-15 20:02:15,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1809 transitions. [2021-10-15 20:02:15,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:15,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1809 transitions. [2021-10-15 20:02:15,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.14285714285714) internal successors, (1809), 21 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:15,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:15,813 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:15,813 INFO L186 Difference]: Start difference. First operand has 293 places, 310 transitions, 4166 flow. Second operand 21 states and 1809 transitions. [2021-10-15 20:02:15,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 374 transitions, 5201 flow [2021-10-15 20:02:15,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 374 transitions, 4901 flow, removed 32 selfloop flow, removed 21 redundant places. [2021-10-15 20:02:15,916 INFO L242 Difference]: Finished difference. Result has 296 places, 302 transitions, 4041 flow [2021-10-15 20:02:15,917 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4041, PETRI_PLACES=296, PETRI_TRANSITIONS=302} [2021-10-15 20:02:15,917 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 173 predicate places. [2021-10-15 20:02:15,917 INFO L470 AbstractCegarLoop]: Abstraction has has 296 places, 302 transitions, 4041 flow [2021-10-15 20:02:15,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:15,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:15,918 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:15,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-15 20:02:15,918 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2047933644, now seen corresponding path program 18 times [2021-10-15 20:02:15,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:15,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670934232] [2021-10-15 20:02:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:15,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:16,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:16,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670934232] [2021-10-15 20:02:16,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670934232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:16,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:16,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:16,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140424829] [2021-10-15 20:02:16,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:16,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:16,170 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:16,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 302 transitions, 4041 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:16,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:16,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:16,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:16,985 INFO L129 PetriNetUnfolder]: 241/876 cut-off events. [2021-10-15 20:02:16,985 INFO L130 PetriNetUnfolder]: For 8329/8354 co-relation queries the response was YES. [2021-10-15 20:02:16,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4986 conditions, 876 events. 241/876 cut-off events. For 8329/8354 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4765 event pairs, 49 based on Foata normal form. 4/867 useless extension candidates. Maximal degree in co-relation 4908. Up to 311 conditions per place. [2021-10-15 20:02:17,002 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 155 selfloop transitions, 96 changer transitions 30/356 dead transitions. [2021-10-15 20:02:17,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 356 transitions, 4980 flow [2021-10-15 20:02:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1800 transitions. [2021-10-15 20:02:17,006 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6396588486140725 [2021-10-15 20:02:17,006 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1800 transitions. [2021-10-15 20:02:17,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1800 transitions. [2021-10-15 20:02:17,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:17,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1800 transitions. [2021-10-15 20:02:17,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.71428571428571) internal successors, (1800), 21 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:17,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:17,016 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:17,016 INFO L186 Difference]: Start difference. First operand has 296 places, 302 transitions, 4041 flow. Second operand 21 states and 1800 transitions. [2021-10-15 20:02:17,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 356 transitions, 4980 flow [2021-10-15 20:02:17,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 356 transitions, 4716 flow, removed 23 selfloop flow, removed 21 redundant places. [2021-10-15 20:02:17,105 INFO L242 Difference]: Finished difference. Result has 290 places, 284 transitions, 3696 flow [2021-10-15 20:02:17,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=3761, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3696, PETRI_PLACES=290, PETRI_TRANSITIONS=284} [2021-10-15 20:02:17,106 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 167 predicate places. [2021-10-15 20:02:17,106 INFO L470 AbstractCegarLoop]: Abstraction has has 290 places, 284 transitions, 3696 flow [2021-10-15 20:02:17,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:17,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:17,107 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:17,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-15 20:02:17,108 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1392883952, now seen corresponding path program 19 times [2021-10-15 20:02:17,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:17,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751672067] [2021-10-15 20:02:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:17,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:17,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:17,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751672067] [2021-10-15 20:02:17,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751672067] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:17,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:17,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:17,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42597588] [2021-10-15 20:02:17,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:17,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:17,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:17,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:17,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 284 transitions, 3696 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:17,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:17,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:17,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:18,174 INFO L129 PetriNetUnfolder]: 247/957 cut-off events. [2021-10-15 20:02:18,174 INFO L130 PetriNetUnfolder]: For 8182/8204 co-relation queries the response was YES. [2021-10-15 20:02:18,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5083 conditions, 957 events. 247/957 cut-off events. For 8182/8204 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5639 event pairs, 92 based on Foata normal form. 11/950 useless extension candidates. Maximal degree in co-relation 5011. Up to 463 conditions per place. [2021-10-15 20:02:18,186 INFO L132 encePairwiseOnDemand]: 112/134 looper letters, 166 selfloop transitions, 50 changer transitions 44/335 dead transitions. [2021-10-15 20:02:18,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 335 transitions, 4778 flow [2021-10-15 20:02:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1779 transitions. [2021-10-15 20:02:18,188 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6321961620469083 [2021-10-15 20:02:18,189 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1779 transitions. [2021-10-15 20:02:18,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1779 transitions. [2021-10-15 20:02:18,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:18,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1779 transitions. [2021-10-15 20:02:18,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 84.71428571428571) internal successors, (1779), 21 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:18,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:18,198 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:18,198 INFO L186 Difference]: Start difference. First operand has 290 places, 284 transitions, 3696 flow. Second operand 21 states and 1779 transitions. [2021-10-15 20:02:18,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 335 transitions, 4778 flow [2021-10-15 20:02:18,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 335 transitions, 4452 flow, removed 51 selfloop flow, removed 20 redundant places. [2021-10-15 20:02:18,278 INFO L242 Difference]: Finished difference. Result has 285 places, 286 transitions, 3591 flow [2021-10-15 20:02:18,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3591, PETRI_PLACES=285, PETRI_TRANSITIONS=286} [2021-10-15 20:02:18,279 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 162 predicate places. [2021-10-15 20:02:18,279 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 286 transitions, 3591 flow [2021-10-15 20:02:18,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:18,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:18,280 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:18,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-15 20:02:18,280 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:18,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1514667682, now seen corresponding path program 20 times [2021-10-15 20:02:18,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:18,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969281846] [2021-10-15 20:02:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:18,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:18,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:18,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969281846] [2021-10-15 20:02:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969281846] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:18,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:18,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:18,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364632491] [2021-10-15 20:02:18,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:18,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:18,481 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:18,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 286 transitions, 3591 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:18,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:18,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:18,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:19,158 INFO L129 PetriNetUnfolder]: 246/1048 cut-off events. [2021-10-15 20:02:19,158 INFO L130 PetriNetUnfolder]: For 7153/7184 co-relation queries the response was YES. [2021-10-15 20:02:19,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5040 conditions, 1048 events. 246/1048 cut-off events. For 7153/7184 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6477 event pairs, 36 based on Foata normal form. 7/1037 useless extension candidates. Maximal degree in co-relation 4964. Up to 184 conditions per place. [2021-10-15 20:02:19,171 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 155 selfloop transitions, 125 changer transitions 40/395 dead transitions. [2021-10-15 20:02:19,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 395 transitions, 5048 flow [2021-10-15 20:02:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-15 20:02:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-15 20:02:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2088 transitions. [2021-10-15 20:02:19,175 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6492537313432836 [2021-10-15 20:02:19,175 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2088 transitions. [2021-10-15 20:02:19,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2088 transitions. [2021-10-15 20:02:19,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:19,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2088 transitions. [2021-10-15 20:02:19,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:19,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 134.0) internal successors, (3350), 25 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:19,186 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 134.0) internal successors, (3350), 25 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:19,186 INFO L186 Difference]: Start difference. First operand has 285 places, 286 transitions, 3591 flow. Second operand 24 states and 2088 transitions. [2021-10-15 20:02:19,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 395 transitions, 5048 flow [2021-10-15 20:02:19,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 395 transitions, 4812 flow, removed 80 selfloop flow, removed 16 redundant places. [2021-10-15 20:02:19,252 INFO L242 Difference]: Finished difference. Result has 292 places, 281 transitions, 3744 flow [2021-10-15 20:02:19,252 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3744, PETRI_PLACES=292, PETRI_TRANSITIONS=281} [2021-10-15 20:02:19,252 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 169 predicate places. [2021-10-15 20:02:19,253 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 281 transitions, 3744 flow [2021-10-15 20:02:19,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:19,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:19,253 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:19,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-15 20:02:19,253 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:19,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1414328046, now seen corresponding path program 21 times [2021-10-15 20:02:19,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:19,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111734945] [2021-10-15 20:02:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:19,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:19,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:19,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111734945] [2021-10-15 20:02:19,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111734945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:19,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:19,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:19,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843846235] [2021-10-15 20:02:19,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:19,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:19,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:19,516 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:19,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 281 transitions, 3744 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:19,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:19,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:19,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:20,359 INFO L129 PetriNetUnfolder]: 273/1060 cut-off events. [2021-10-15 20:02:20,359 INFO L130 PetriNetUnfolder]: For 9168/9205 co-relation queries the response was YES. [2021-10-15 20:02:20,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5769 conditions, 1060 events. 273/1060 cut-off events. For 9168/9205 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6469 event pairs, 65 based on Foata normal form. 8/1049 useless extension candidates. Maximal degree in co-relation 5697. Up to 354 conditions per place. [2021-10-15 20:02:20,371 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 186 selfloop transitions, 115 changer transitions 24/400 dead transitions. [2021-10-15 20:02:20,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 400 transitions, 5818 flow [2021-10-15 20:02:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-15 20:02:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-15 20:02:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2297 transitions. [2021-10-15 20:02:20,373 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.634881149806523 [2021-10-15 20:02:20,373 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2297 transitions. [2021-10-15 20:02:20,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2297 transitions. [2021-10-15 20:02:20,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:20,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2297 transitions. [2021-10-15 20:02:20,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 85.07407407407408) internal successors, (2297), 27 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:20,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 134.0) internal successors, (3752), 28 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:20,380 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 134.0) internal successors, (3752), 28 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:20,381 INFO L186 Difference]: Start difference. First operand has 292 places, 281 transitions, 3744 flow. Second operand 27 states and 2297 transitions. [2021-10-15 20:02:20,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 400 transitions, 5818 flow [2021-10-15 20:02:20,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 400 transitions, 5446 flow, removed 82 selfloop flow, removed 14 redundant places. [2021-10-15 20:02:20,461 INFO L242 Difference]: Finished difference. Result has 320 places, 327 transitions, 4745 flow [2021-10-15 20:02:20,461 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4745, PETRI_PLACES=320, PETRI_TRANSITIONS=327} [2021-10-15 20:02:20,461 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 197 predicate places. [2021-10-15 20:02:20,461 INFO L470 AbstractCegarLoop]: Abstraction has has 320 places, 327 transitions, 4745 flow [2021-10-15 20:02:20,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:20,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:20,462 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:20,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-15 20:02:20,462 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:20,462 INFO L82 PathProgramCache]: Analyzing trace with hash 572294772, now seen corresponding path program 22 times [2021-10-15 20:02:20,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:20,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625597103] [2021-10-15 20:02:20,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:20,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:20,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:20,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625597103] [2021-10-15 20:02:20,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625597103] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:20,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:20,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:20,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407823117] [2021-10-15 20:02:20,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:20,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:20,735 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:20,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 327 transitions, 4745 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:20,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:20,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:20,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:21,668 INFO L129 PetriNetUnfolder]: 298/1184 cut-off events. [2021-10-15 20:02:21,668 INFO L130 PetriNetUnfolder]: For 12420/12465 co-relation queries the response was YES. [2021-10-15 20:02:21,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6586 conditions, 1184 events. 298/1184 cut-off events. For 12420/12465 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7614 event pairs, 109 based on Foata normal form. 16/1174 useless extension candidates. Maximal degree in co-relation 6497. Up to 457 conditions per place. [2021-10-15 20:02:21,685 INFO L132 encePairwiseOnDemand]: 111/134 looper letters, 192 selfloop transitions, 114 changer transitions 26/407 dead transitions. [2021-10-15 20:02:21,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 407 transitions, 6377 flow [2021-10-15 20:02:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-15 20:02:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-15 20:02:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2129 transitions. [2021-10-15 20:02:21,689 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6355223880597015 [2021-10-15 20:02:21,689 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2129 transitions. [2021-10-15 20:02:21,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2129 transitions. [2021-10-15 20:02:21,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:21,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2129 transitions. [2021-10-15 20:02:21,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 85.16) internal successors, (2129), 25 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:21,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 134.0) internal successors, (3484), 26 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:21,700 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 134.0) internal successors, (3484), 26 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:21,700 INFO L186 Difference]: Start difference. First operand has 320 places, 327 transitions, 4745 flow. Second operand 25 states and 2129 transitions. [2021-10-15 20:02:21,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 407 transitions, 6377 flow [2021-10-15 20:02:21,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 407 transitions, 6225 flow, removed 67 selfloop flow, removed 12 redundant places. [2021-10-15 20:02:21,833 INFO L242 Difference]: Finished difference. Result has 340 places, 357 transitions, 5537 flow [2021-10-15 20:02:21,834 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4633, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5537, PETRI_PLACES=340, PETRI_TRANSITIONS=357} [2021-10-15 20:02:21,834 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 217 predicate places. [2021-10-15 20:02:21,834 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 357 transitions, 5537 flow [2021-10-15 20:02:21,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:21,835 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:21,835 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:21,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-15 20:02:21,836 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1702738356, now seen corresponding path program 23 times [2021-10-15 20:02:21,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:21,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060178295] [2021-10-15 20:02:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:21,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:22,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:22,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060178295] [2021-10-15 20:02:22,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060178295] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:22,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:22,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:22,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317400615] [2021-10-15 20:02:22,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:22,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:22,049 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:22,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 357 transitions, 5537 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:22,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:22,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:22,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:22,967 INFO L129 PetriNetUnfolder]: 344/1387 cut-off events. [2021-10-15 20:02:22,967 INFO L130 PetriNetUnfolder]: For 15208/15257 co-relation queries the response was YES. [2021-10-15 20:02:22,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8047 conditions, 1387 events. 344/1387 cut-off events. For 15208/15257 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9687 event pairs, 88 based on Foata normal form. 2/1356 useless extension candidates. Maximal degree in co-relation 7950. Up to 405 conditions per place. [2021-10-15 20:02:22,991 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 236 selfloop transitions, 171 changer transitions 29/511 dead transitions. [2021-10-15 20:02:22,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 511 transitions, 8262 flow [2021-10-15 20:02:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 20:02:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-15 20:02:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1994 transitions. [2021-10-15 20:02:22,993 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6469824789097989 [2021-10-15 20:02:22,993 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1994 transitions. [2021-10-15 20:02:22,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1994 transitions. [2021-10-15 20:02:22,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:22,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1994 transitions. [2021-10-15 20:02:22,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 86.69565217391305) internal successors, (1994), 23 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:22,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:22,998 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:22,998 INFO L186 Difference]: Start difference. First operand has 340 places, 357 transitions, 5537 flow. Second operand 23 states and 1994 transitions. [2021-10-15 20:02:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 511 transitions, 8262 flow [2021-10-15 20:02:23,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 511 transitions, 7935 flow, removed 149 selfloop flow, removed 10 redundant places. [2021-10-15 20:02:23,121 INFO L242 Difference]: Finished difference. Result has 360 places, 404 transitions, 6875 flow [2021-10-15 20:02:23,122 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6875, PETRI_PLACES=360, PETRI_TRANSITIONS=404} [2021-10-15 20:02:23,122 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 237 predicate places. [2021-10-15 20:02:23,123 INFO L470 AbstractCegarLoop]: Abstraction has has 360 places, 404 transitions, 6875 flow [2021-10-15 20:02:23,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:23,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:23,123 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:23,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-15 20:02:23,124 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1507161830, now seen corresponding path program 24 times [2021-10-15 20:02:23,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:23,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874707321] [2021-10-15 20:02:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:23,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:23,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:23,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874707321] [2021-10-15 20:02:23,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874707321] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:23,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:23,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:23,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485222737] [2021-10-15 20:02:23,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:23,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:23,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:23,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 404 transitions, 6875 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:23,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:23,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:23,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:24,294 INFO L129 PetriNetUnfolder]: 358/1422 cut-off events. [2021-10-15 20:02:24,294 INFO L130 PetriNetUnfolder]: For 18069/18125 co-relation queries the response was YES. [2021-10-15 20:02:24,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8546 conditions, 1422 events. 358/1422 cut-off events. For 18069/18125 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9978 event pairs, 101 based on Foata normal form. 4/1395 useless extension candidates. Maximal degree in co-relation 8440. Up to 503 conditions per place. [2021-10-15 20:02:24,316 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 214 selfloop transitions, 157 changer transitions 30/476 dead transitions. [2021-10-15 20:02:24,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 476 transitions, 8471 flow [2021-10-15 20:02:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-15 20:02:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-15 20:02:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2058 transitions. [2021-10-15 20:02:24,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6399253731343284 [2021-10-15 20:02:24,319 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2058 transitions. [2021-10-15 20:02:24,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2058 transitions. [2021-10-15 20:02:24,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:24,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2058 transitions. [2021-10-15 20:02:24,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.75) internal successors, (2058), 24 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:24,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 134.0) internal successors, (3350), 25 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:24,329 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 134.0) internal successors, (3350), 25 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:24,329 INFO L186 Difference]: Start difference. First operand has 360 places, 404 transitions, 6875 flow. Second operand 24 states and 2058 transitions. [2021-10-15 20:02:24,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 476 transitions, 8471 flow [2021-10-15 20:02:24,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 476 transitions, 8334 flow, removed 65 selfloop flow, removed 11 redundant places. [2021-10-15 20:02:24,572 INFO L242 Difference]: Finished difference. Result has 369 places, 400 transitions, 7122 flow [2021-10-15 20:02:24,573 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7122, PETRI_PLACES=369, PETRI_TRANSITIONS=400} [2021-10-15 20:02:24,574 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 246 predicate places. [2021-10-15 20:02:24,574 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 400 transitions, 7122 flow [2021-10-15 20:02:24,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:24,574 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:24,575 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:24,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-15 20:02:24,575 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:24,576 INFO L82 PathProgramCache]: Analyzing trace with hash 487845884, now seen corresponding path program 25 times [2021-10-15 20:02:24,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:24,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739933365] [2021-10-15 20:02:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:24,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:24,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:24,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739933365] [2021-10-15 20:02:24,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739933365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:24,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:24,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-15 20:02:24,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758632676] [2021-10-15 20:02:24,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:02:24,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:24,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:02:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:02:24,840 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:24,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 400 transitions, 7122 flow. Second operand has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:24,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:24,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:24,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:25,771 INFO L129 PetriNetUnfolder]: 385/1585 cut-off events. [2021-10-15 20:02:25,771 INFO L130 PetriNetUnfolder]: For 23005/23070 co-relation queries the response was YES. [2021-10-15 20:02:25,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9563 conditions, 1585 events. 385/1585 cut-off events. For 23005/23070 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 11785 event pairs, 149 based on Foata normal form. 7/1546 useless extension candidates. Maximal degree in co-relation 9459. Up to 784 conditions per place. [2021-10-15 20:02:25,804 INFO L132 encePairwiseOnDemand]: 116/134 looper letters, 247 selfloop transitions, 88 changer transitions 66/476 dead transitions. [2021-10-15 20:02:25,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 476 transitions, 9128 flow [2021-10-15 20:02:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 20:02:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 20:02:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1451 transitions. [2021-10-15 20:02:25,806 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6369622475856014 [2021-10-15 20:02:25,807 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1451 transitions. [2021-10-15 20:02:25,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1451 transitions. [2021-10-15 20:02:25,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:25,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1451 transitions. [2021-10-15 20:02:25,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.3529411764706) internal successors, (1451), 17 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:25,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 134.0) internal successors, (2412), 18 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:25,811 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 134.0) internal successors, (2412), 18 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:25,811 INFO L186 Difference]: Start difference. First operand has 369 places, 400 transitions, 7122 flow. Second operand 17 states and 1451 transitions. [2021-10-15 20:02:25,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 476 transitions, 9128 flow [2021-10-15 20:02:25,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 476 transitions, 8891 flow, removed 24 selfloop flow, removed 16 redundant places. [2021-10-15 20:02:25,997 INFO L242 Difference]: Finished difference. Result has 371 places, 397 transitions, 7185 flow [2021-10-15 20:02:25,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7185, PETRI_PLACES=371, PETRI_TRANSITIONS=397} [2021-10-15 20:02:25,998 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 248 predicate places. [2021-10-15 20:02:25,998 INFO L470 AbstractCegarLoop]: Abstraction has has 371 places, 397 transitions, 7185 flow [2021-10-15 20:02:25,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:25,998 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:25,998 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:25,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-15 20:02:25,999 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1840257882, now seen corresponding path program 26 times [2021-10-15 20:02:25,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:25,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388784154] [2021-10-15 20:02:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:26,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:26,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:26,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388784154] [2021-10-15 20:02:26,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388784154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:26,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:26,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:26,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482622473] [2021-10-15 20:02:26,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:26,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:26,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:26,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:26,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:26,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 397 transitions, 7185 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:26,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:26,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:26,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:27,215 INFO L129 PetriNetUnfolder]: 341/1420 cut-off events. [2021-10-15 20:02:27,215 INFO L130 PetriNetUnfolder]: For 21405/21464 co-relation queries the response was YES. [2021-10-15 20:02:27,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8784 conditions, 1420 events. 341/1420 cut-off events. For 21405/21464 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10088 event pairs, 103 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 8674. Up to 570 conditions per place. [2021-10-15 20:02:27,236 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 266 selfloop transitions, 113 changer transitions 27/481 dead transitions. [2021-10-15 20:02:27,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 481 transitions, 8969 flow [2021-10-15 20:02:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1714 transitions. [2021-10-15 20:02:27,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6395522388059701 [2021-10-15 20:02:27,238 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1714 transitions. [2021-10-15 20:02:27,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1714 transitions. [2021-10-15 20:02:27,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:27,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1714 transitions. [2021-10-15 20:02:27,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 85.7) internal successors, (1714), 20 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,243 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,243 INFO L186 Difference]: Start difference. First operand has 371 places, 397 transitions, 7185 flow. Second operand 20 states and 1714 transitions. [2021-10-15 20:02:27,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 481 transitions, 8969 flow [2021-10-15 20:02:27,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 481 transitions, 8740 flow, removed 87 selfloop flow, removed 10 redundant places. [2021-10-15 20:02:27,409 INFO L242 Difference]: Finished difference. Result has 384 places, 394 transitions, 7194 flow [2021-10-15 20:02:27,409 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=7016, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7194, PETRI_PLACES=384, PETRI_TRANSITIONS=394} [2021-10-15 20:02:27,410 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 261 predicate places. [2021-10-15 20:02:27,410 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 394 transitions, 7194 flow [2021-10-15 20:02:27,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,410 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:27,411 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:27,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-15 20:02:27,411 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:27,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2115844460, now seen corresponding path program 27 times [2021-10-15 20:02:27,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:27,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765940837] [2021-10-15 20:02:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:27,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:27,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:27,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765940837] [2021-10-15 20:02:27,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765940837] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:27,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:27,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:27,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890640049] [2021-10-15 20:02:27,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:27,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:27,676 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:27,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 394 transitions, 7194 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:27,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:27,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:27,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:28,715 INFO L129 PetriNetUnfolder]: 352/1468 cut-off events. [2021-10-15 20:02:28,715 INFO L130 PetriNetUnfolder]: For 22701/22768 co-relation queries the response was YES. [2021-10-15 20:02:28,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8979 conditions, 1468 events. 352/1468 cut-off events. For 22701/22768 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 10648 event pairs, 110 based on Foata normal form. 10/1443 useless extension candidates. Maximal degree in co-relation 8865. Up to 487 conditions per place. [2021-10-15 20:02:28,738 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 218 selfloop transitions, 131 changer transitions 42/466 dead transitions. [2021-10-15 20:02:28,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 466 transitions, 8713 flow [2021-10-15 20:02:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:02:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:02:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1889 transitions. [2021-10-15 20:02:28,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6407734056987788 [2021-10-15 20:02:28,741 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1889 transitions. [2021-10-15 20:02:28,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1889 transitions. [2021-10-15 20:02:28,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:28,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1889 transitions. [2021-10-15 20:02:28,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.86363636363636) internal successors, (1889), 22 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,750 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,750 INFO L186 Difference]: Start difference. First operand has 384 places, 394 transitions, 7194 flow. Second operand 22 states and 1889 transitions. [2021-10-15 20:02:28,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 466 transitions, 8713 flow [2021-10-15 20:02:28,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 466 transitions, 8587 flow, removed 24 selfloop flow, removed 13 redundant places. [2021-10-15 20:02:28,944 INFO L242 Difference]: Finished difference. Result has 391 places, 373 transitions, 7052 flow [2021-10-15 20:02:28,944 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=7086, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7052, PETRI_PLACES=391, PETRI_TRANSITIONS=373} [2021-10-15 20:02:28,944 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 268 predicate places. [2021-10-15 20:02:28,945 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 373 transitions, 7052 flow [2021-10-15 20:02:28,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:28,945 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:28,945 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:28,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-10-15 20:02:28,945 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1954343880, now seen corresponding path program 28 times [2021-10-15 20:02:28,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:28,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049245006] [2021-10-15 20:02:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:28,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:29,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:29,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049245006] [2021-10-15 20:02:29,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049245006] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:29,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:29,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-15 20:02:29,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850630519] [2021-10-15 20:02:29,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:02:29,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:02:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:02:29,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:29,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 373 transitions, 7052 flow. Second operand has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:29,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:29,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:29,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:30,322 INFO L129 PetriNetUnfolder]: 375/1596 cut-off events. [2021-10-15 20:02:30,322 INFO L130 PetriNetUnfolder]: For 27145/27208 co-relation queries the response was YES. [2021-10-15 20:02:30,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9799 conditions, 1596 events. 375/1596 cut-off events. For 27145/27208 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12232 event pairs, 112 based on Foata normal form. 6/1562 useless extension candidates. Maximal degree in co-relation 9684. Up to 593 conditions per place. [2021-10-15 20:02:30,361 INFO L132 encePairwiseOnDemand]: 116/134 looper letters, 197 selfloop transitions, 154 changer transitions 58/484 dead transitions. [2021-10-15 20:02:30,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 484 transitions, 9500 flow [2021-10-15 20:02:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1733 transitions. [2021-10-15 20:02:30,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6466417910447761 [2021-10-15 20:02:30,364 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1733 transitions. [2021-10-15 20:02:30,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1733 transitions. [2021-10-15 20:02:30,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:30,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1733 transitions. [2021-10-15 20:02:30,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.65) internal successors, (1733), 20 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:30,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:30,461 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:30,461 INFO L186 Difference]: Start difference. First operand has 391 places, 373 transitions, 7052 flow. Second operand 20 states and 1733 transitions. [2021-10-15 20:02:30,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 484 transitions, 9500 flow [2021-10-15 20:02:30,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 484 transitions, 9157 flow, removed 51 selfloop flow, removed 19 redundant places. [2021-10-15 20:02:30,646 INFO L242 Difference]: Finished difference. Result has 391 places, 385 transitions, 7468 flow [2021-10-15 20:02:30,647 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7468, PETRI_PLACES=391, PETRI_TRANSITIONS=385} [2021-10-15 20:02:30,648 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 268 predicate places. [2021-10-15 20:02:30,648 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 385 transitions, 7468 flow [2021-10-15 20:02:30,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:30,648 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:30,648 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:30,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-15 20:02:30,649 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash -69240350, now seen corresponding path program 29 times [2021-10-15 20:02:30,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:30,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184878945] [2021-10-15 20:02:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:30,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:30,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:30,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184878945] [2021-10-15 20:02:30,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184878945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:30,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:30,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:30,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786534795] [2021-10-15 20:02:30,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:30,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:30,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:30,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:30,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:30,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 385 transitions, 7468 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:30,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:30,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:30,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:31,533 INFO L129 PetriNetUnfolder]: 318/1361 cut-off events. [2021-10-15 20:02:31,533 INFO L130 PetriNetUnfolder]: For 25081/25140 co-relation queries the response was YES. [2021-10-15 20:02:31,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8775 conditions, 1361 events. 318/1361 cut-off events. For 25081/25140 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9696 event pairs, 103 based on Foata normal form. 2/1332 useless extension candidates. Maximal degree in co-relation 8659. Up to 491 conditions per place. [2021-10-15 20:02:31,553 INFO L132 encePairwiseOnDemand]: 112/134 looper letters, 212 selfloop transitions, 96 changer transitions 31/414 dead transitions. [2021-10-15 20:02:31,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 414 transitions, 8346 flow [2021-10-15 20:02:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1779 transitions. [2021-10-15 20:02:31,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6321961620469083 [2021-10-15 20:02:31,556 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1779 transitions. [2021-10-15 20:02:31,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1779 transitions. [2021-10-15 20:02:31,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:31,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1779 transitions. [2021-10-15 20:02:31,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 84.71428571428571) internal successors, (1779), 21 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:31,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:31,564 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:31,564 INFO L186 Difference]: Start difference. First operand has 391 places, 385 transitions, 7468 flow. Second operand 21 states and 1779 transitions. [2021-10-15 20:02:31,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 414 transitions, 8346 flow [2021-10-15 20:02:31,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 414 transitions, 7942 flow, removed 71 selfloop flow, removed 16 redundant places. [2021-10-15 20:02:31,807 INFO L242 Difference]: Finished difference. Result has 396 places, 366 transitions, 6897 flow [2021-10-15 20:02:31,807 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=7014, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6897, PETRI_PLACES=396, PETRI_TRANSITIONS=366} [2021-10-15 20:02:31,808 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 273 predicate places. [2021-10-15 20:02:31,808 INFO L470 AbstractCegarLoop]: Abstraction has has 396 places, 366 transitions, 6897 flow [2021-10-15 20:02:31,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:31,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:31,808 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:31,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-15 20:02:31,809 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash -227302216, now seen corresponding path program 30 times [2021-10-15 20:02:31,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:31,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221926412] [2021-10-15 20:02:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:31,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:32,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:32,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221926412] [2021-10-15 20:02:32,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221926412] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:32,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:32,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:32,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368880074] [2021-10-15 20:02:32,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:32,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:32,053 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:32,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 366 transitions, 6897 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:32,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:32,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:32,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:32,952 INFO L129 PetriNetUnfolder]: 300/1281 cut-off events. [2021-10-15 20:02:32,953 INFO L130 PetriNetUnfolder]: For 23041/23110 co-relation queries the response was YES. [2021-10-15 20:02:32,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8198 conditions, 1281 events. 300/1281 cut-off events. For 23041/23110 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8825 event pairs, 97 based on Foata normal form. 12/1266 useless extension candidates. Maximal degree in co-relation 8083. Up to 523 conditions per place. [2021-10-15 20:02:32,972 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 210 selfloop transitions, 102 changer transitions 41/428 dead transitions. [2021-10-15 20:02:32,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 428 transitions, 8196 flow [2021-10-15 20:02:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1722 transitions. [2021-10-15 20:02:32,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6425373134328358 [2021-10-15 20:02:32,976 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1722 transitions. [2021-10-15 20:02:32,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1722 transitions. [2021-10-15 20:02:32,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:32,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1722 transitions. [2021-10-15 20:02:32,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.1) internal successors, (1722), 20 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:32,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:32,984 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:32,984 INFO L186 Difference]: Start difference. First operand has 396 places, 366 transitions, 6897 flow. Second operand 20 states and 1722 transitions. [2021-10-15 20:02:32,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 428 transitions, 8196 flow [2021-10-15 20:02:33,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 428 transitions, 7767 flow, removed 48 selfloop flow, removed 23 redundant places. [2021-10-15 20:02:33,173 INFO L242 Difference]: Finished difference. Result has 379 places, 344 transitions, 6041 flow [2021-10-15 20:02:33,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6437, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6041, PETRI_PLACES=379, PETRI_TRANSITIONS=344} [2021-10-15 20:02:33,174 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 256 predicate places. [2021-10-15 20:02:33,174 INFO L470 AbstractCegarLoop]: Abstraction has has 379 places, 344 transitions, 6041 flow [2021-10-15 20:02:33,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:33,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:33,175 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:33,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-15 20:02:33,176 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash -35278502, now seen corresponding path program 31 times [2021-10-15 20:02:33,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:33,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547491551] [2021-10-15 20:02:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:33,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:33,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:33,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547491551] [2021-10-15 20:02:33,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547491551] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:33,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:33,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:33,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67037732] [2021-10-15 20:02:33,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:33,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:33,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:33,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:33,458 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:33,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 344 transitions, 6041 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:33,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:33,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:33,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:34,398 INFO L129 PetriNetUnfolder]: 292/1251 cut-off events. [2021-10-15 20:02:34,399 INFO L130 PetriNetUnfolder]: For 18779/18832 co-relation queries the response was YES. [2021-10-15 20:02:34,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 1251 events. 292/1251 cut-off events. For 18779/18832 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8628 event pairs, 92 based on Foata normal form. 2/1226 useless extension candidates. Maximal degree in co-relation 7495. Up to 603 conditions per place. [2021-10-15 20:02:34,420 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 220 selfloop transitions, 58 changer transitions 29/382 dead transitions. [2021-10-15 20:02:34,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 382 transitions, 6930 flow [2021-10-15 20:02:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 20:02:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 20:02:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1541 transitions. [2021-10-15 20:02:34,422 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2021-10-15 20:02:34,422 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1541 transitions. [2021-10-15 20:02:34,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1541 transitions. [2021-10-15 20:02:34,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:34,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1541 transitions. [2021-10-15 20:02:34,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.61111111111111) internal successors, (1541), 18 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:34,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 134.0) internal successors, (2546), 19 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:34,430 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 134.0) internal successors, (2546), 19 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:34,430 INFO L186 Difference]: Start difference. First operand has 379 places, 344 transitions, 6041 flow. Second operand 18 states and 1541 transitions. [2021-10-15 20:02:34,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 382 transitions, 6930 flow [2021-10-15 20:02:34,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 382 transitions, 6323 flow, removed 37 selfloop flow, removed 39 redundant places. [2021-10-15 20:02:34,635 INFO L242 Difference]: Finished difference. Result has 351 places, 335 transitions, 5367 flow [2021-10-15 20:02:34,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=5457, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5367, PETRI_PLACES=351, PETRI_TRANSITIONS=335} [2021-10-15 20:02:34,636 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 228 predicate places. [2021-10-15 20:02:34,637 INFO L470 AbstractCegarLoop]: Abstraction has has 351 places, 335 transitions, 5367 flow [2021-10-15 20:02:34,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:34,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:34,638 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:34,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-15 20:02:34,638 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:34,639 INFO L82 PathProgramCache]: Analyzing trace with hash 395435636, now seen corresponding path program 32 times [2021-10-15 20:02:34,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:34,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987313245] [2021-10-15 20:02:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:34,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:34,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:34,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987313245] [2021-10-15 20:02:34,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987313245] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:34,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:34,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:34,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067878895] [2021-10-15 20:02:34,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:34,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:34,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:34,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:34,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:34,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 335 transitions, 5367 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:34,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:34,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:34,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:35,694 INFO L129 PetriNetUnfolder]: 295/1261 cut-off events. [2021-10-15 20:02:35,694 INFO L130 PetriNetUnfolder]: For 15840/15907 co-relation queries the response was YES. [2021-10-15 20:02:35,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7305 conditions, 1261 events. 295/1261 cut-off events. For 15840/15907 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8753 event pairs, 84 based on Foata normal form. 10/1243 useless extension candidates. Maximal degree in co-relation 7205. Up to 606 conditions per place. [2021-10-15 20:02:35,723 INFO L132 encePairwiseOnDemand]: 111/134 looper letters, 212 selfloop transitions, 77 changer transitions 29/393 dead transitions. [2021-10-15 20:02:35,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 393 transitions, 6733 flow [2021-10-15 20:02:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1710 transitions. [2021-10-15 20:02:35,726 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6380597014925373 [2021-10-15 20:02:35,726 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1710 transitions. [2021-10-15 20:02:35,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1710 transitions. [2021-10-15 20:02:35,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:35,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1710 transitions. [2021-10-15 20:02:35,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 85.5) internal successors, (1710), 20 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:35,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:35,734 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:35,734 INFO L186 Difference]: Start difference. First operand has 351 places, 335 transitions, 5367 flow. Second operand 20 states and 1710 transitions. [2021-10-15 20:02:35,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 393 transitions, 6733 flow [2021-10-15 20:02:35,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 393 transitions, 6514 flow, removed 52 selfloop flow, removed 17 redundant places. [2021-10-15 20:02:35,933 INFO L242 Difference]: Finished difference. Result has 354 places, 346 transitions, 5637 flow [2021-10-15 20:02:35,934 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5637, PETRI_PLACES=354, PETRI_TRANSITIONS=346} [2021-10-15 20:02:35,934 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 231 predicate places. [2021-10-15 20:02:35,935 INFO L470 AbstractCegarLoop]: Abstraction has has 354 places, 346 transitions, 5637 flow [2021-10-15 20:02:35,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:35,935 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:35,935 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:35,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-15 20:02:35,936 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash 172590162, now seen corresponding path program 33 times [2021-10-15 20:02:35,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:35,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442287265] [2021-10-15 20:02:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:35,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:36,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:36,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442287265] [2021-10-15 20:02:36,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442287265] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:36,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:36,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:36,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037395874] [2021-10-15 20:02:36,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:36,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:36,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:36,221 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:36,222 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 346 transitions, 5637 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:36,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:36,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:36,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:37,049 INFO L129 PetriNetUnfolder]: 304/1317 cut-off events. [2021-10-15 20:02:37,049 INFO L130 PetriNetUnfolder]: For 17395/17456 co-relation queries the response was YES. [2021-10-15 20:02:37,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7591 conditions, 1317 events. 304/1317 cut-off events. For 17395/17456 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9393 event pairs, 97 based on Foata normal form. 8/1295 useless extension candidates. Maximal degree in co-relation 7490. Up to 595 conditions per place. [2021-10-15 20:02:37,066 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 215 selfloop transitions, 77 changer transitions 34/401 dead transitions. [2021-10-15 20:02:37,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 401 transitions, 6856 flow [2021-10-15 20:02:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:02:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:02:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1631 transitions. [2021-10-15 20:02:37,067 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6406127258444619 [2021-10-15 20:02:37,067 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1631 transitions. [2021-10-15 20:02:37,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1631 transitions. [2021-10-15 20:02:37,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:37,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1631 transitions. [2021-10-15 20:02:37,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.84210526315789) internal successors, (1631), 19 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:37,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:37,072 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:37,072 INFO L186 Difference]: Start difference. First operand has 354 places, 346 transitions, 5637 flow. Second operand 19 states and 1631 transitions. [2021-10-15 20:02:37,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 401 transitions, 6856 flow [2021-10-15 20:02:37,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 401 transitions, 6713 flow, removed 38 selfloop flow, removed 13 redundant places. [2021-10-15 20:02:37,230 INFO L242 Difference]: Finished difference. Result has 359 places, 347 transitions, 5731 flow [2021-10-15 20:02:37,231 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5731, PETRI_PLACES=359, PETRI_TRANSITIONS=347} [2021-10-15 20:02:37,231 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 236 predicate places. [2021-10-15 20:02:37,231 INFO L470 AbstractCegarLoop]: Abstraction has has 359 places, 347 transitions, 5731 flow [2021-10-15 20:02:37,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:37,231 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:37,232 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:37,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-10-15 20:02:37,232 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1934824204, now seen corresponding path program 34 times [2021-10-15 20:02:37,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:37,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564826321] [2021-10-15 20:02:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:37,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:37,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:37,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564826321] [2021-10-15 20:02:37,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564826321] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:37,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:37,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:37,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916835445] [2021-10-15 20:02:37,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:37,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:37,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:37,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:37,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:37,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 347 transitions, 5731 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:37,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:37,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:37,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:38,328 INFO L129 PetriNetUnfolder]: 338/1434 cut-off events. [2021-10-15 20:02:38,329 INFO L130 PetriNetUnfolder]: For 19810/19871 co-relation queries the response was YES. [2021-10-15 20:02:38,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8645 conditions, 1434 events. 338/1434 cut-off events. For 19810/19871 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10564 event pairs, 93 based on Foata normal form. 10/1410 useless extension candidates. Maximal degree in co-relation 8546. Up to 466 conditions per place. [2021-10-15 20:02:38,358 INFO L132 encePairwiseOnDemand]: 111/134 looper letters, 208 selfloop transitions, 183 changer transitions 47/513 dead transitions. [2021-10-15 20:02:38,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 513 transitions, 9157 flow [2021-10-15 20:02:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:02:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:02:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1912 transitions. [2021-10-15 20:02:38,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6485753052917232 [2021-10-15 20:02:38,362 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1912 transitions. [2021-10-15 20:02:38,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1912 transitions. [2021-10-15 20:02:38,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:38,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1912 transitions. [2021-10-15 20:02:38,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.9090909090909) internal successors, (1912), 22 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:38,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:38,370 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:38,371 INFO L186 Difference]: Start difference. First operand has 359 places, 347 transitions, 5731 flow. Second operand 22 states and 1912 transitions. [2021-10-15 20:02:38,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 513 transitions, 9157 flow [2021-10-15 20:02:38,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 513 transitions, 8994 flow, removed 44 selfloop flow, removed 13 redundant places. [2021-10-15 20:02:38,610 INFO L242 Difference]: Finished difference. Result has 373 places, 404 transitions, 7526 flow [2021-10-15 20:02:38,611 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=5644, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7526, PETRI_PLACES=373, PETRI_TRANSITIONS=404} [2021-10-15 20:02:38,611 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 250 predicate places. [2021-10-15 20:02:38,612 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 404 transitions, 7526 flow [2021-10-15 20:02:38,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:38,612 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:38,613 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:38,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-15 20:02:38,613 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:38,617 INFO L82 PathProgramCache]: Analyzing trace with hash -148032746, now seen corresponding path program 35 times [2021-10-15 20:02:38,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:38,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483426817] [2021-10-15 20:02:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:38,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:38,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:38,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483426817] [2021-10-15 20:02:38,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483426817] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:38,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:38,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:38,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601894128] [2021-10-15 20:02:38,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:38,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:38,859 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:38,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 404 transitions, 7526 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:38,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:38,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:38,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:39,801 INFO L129 PetriNetUnfolder]: 307/1323 cut-off events. [2021-10-15 20:02:39,801 INFO L130 PetriNetUnfolder]: For 21872/21927 co-relation queries the response was YES. [2021-10-15 20:02:39,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8564 conditions, 1323 events. 307/1323 cut-off events. For 21872/21927 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9364 event pairs, 93 based on Foata normal form. 2/1298 useless extension candidates. Maximal degree in co-relation 8458. Up to 657 conditions per place. [2021-10-15 20:02:39,820 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 269 selfloop transitions, 72 changer transitions 29/445 dead transitions. [2021-10-15 20:02:39,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 445 transitions, 8667 flow [2021-10-15 20:02:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:02:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:02:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1626 transitions. [2021-10-15 20:02:39,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.638648860958366 [2021-10-15 20:02:39,822 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1626 transitions. [2021-10-15 20:02:39,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1626 transitions. [2021-10-15 20:02:39,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:39,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1626 transitions. [2021-10-15 20:02:39,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.57894736842105) internal successors, (1626), 19 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:39,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:39,825 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:39,826 INFO L186 Difference]: Start difference. First operand has 373 places, 404 transitions, 7526 flow. Second operand 19 states and 1626 transitions. [2021-10-15 20:02:39,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 445 transitions, 8667 flow [2021-10-15 20:02:39,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 445 transitions, 8399 flow, removed 98 selfloop flow, removed 12 redundant places. [2021-10-15 20:02:39,975 INFO L242 Difference]: Finished difference. Result has 383 places, 399 transitions, 7365 flow [2021-10-15 20:02:39,975 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=7319, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7365, PETRI_PLACES=383, PETRI_TRANSITIONS=399} [2021-10-15 20:02:39,975 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 260 predicate places. [2021-10-15 20:02:39,975 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 399 transitions, 7365 flow [2021-10-15 20:02:39,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:39,976 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:39,976 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:39,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-10-15 20:02:39,976 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:39,976 INFO L82 PathProgramCache]: Analyzing trace with hash -853950194, now seen corresponding path program 36 times [2021-10-15 20:02:39,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:39,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817053169] [2021-10-15 20:02:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:39,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:40,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:40,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817053169] [2021-10-15 20:02:40,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817053169] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:40,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:40,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:40,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482183596] [2021-10-15 20:02:40,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:40,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:40,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:40,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:40,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 399 transitions, 7365 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:40,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:40,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:40,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:41,084 INFO L129 PetriNetUnfolder]: 300/1290 cut-off events. [2021-10-15 20:02:41,084 INFO L130 PetriNetUnfolder]: For 21313/21368 co-relation queries the response was YES. [2021-10-15 20:02:41,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8268 conditions, 1290 events. 300/1290 cut-off events. For 21313/21368 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9009 event pairs, 91 based on Foata normal form. 2/1265 useless extension candidates. Maximal degree in co-relation 8159. Up to 643 conditions per place. [2021-10-15 20:02:41,102 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 264 selfloop transitions, 66 changer transitions 30/435 dead transitions. [2021-10-15 20:02:41,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 435 transitions, 8385 flow [2021-10-15 20:02:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1702 transitions. [2021-10-15 20:02:41,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6350746268656716 [2021-10-15 20:02:41,104 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1702 transitions. [2021-10-15 20:02:41,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1702 transitions. [2021-10-15 20:02:41,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:41,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1702 transitions. [2021-10-15 20:02:41,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 85.1) internal successors, (1702), 20 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:41,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:41,109 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:41,109 INFO L186 Difference]: Start difference. First operand has 383 places, 399 transitions, 7365 flow. Second operand 20 states and 1702 transitions. [2021-10-15 20:02:41,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 435 transitions, 8385 flow [2021-10-15 20:02:41,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 435 transitions, 8166 flow, removed 34 selfloop flow, removed 20 redundant places. [2021-10-15 20:02:41,303 INFO L242 Difference]: Finished difference. Result has 384 places, 388 transitions, 7095 flow [2021-10-15 20:02:41,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7095, PETRI_PLACES=384, PETRI_TRANSITIONS=388} [2021-10-15 20:02:41,304 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 261 predicate places. [2021-10-15 20:02:41,304 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 388 transitions, 7095 flow [2021-10-15 20:02:41,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:41,304 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:41,305 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:41,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-10-15 20:02:41,305 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1860275312, now seen corresponding path program 37 times [2021-10-15 20:02:41,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:41,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999211393] [2021-10-15 20:02:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:41,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:41,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:41,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999211393] [2021-10-15 20:02:41,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999211393] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:41,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:41,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:41,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948506290] [2021-10-15 20:02:41,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:41,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:41,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:41,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 388 transitions, 7095 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:41,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:41,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:41,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:42,387 INFO L129 PetriNetUnfolder]: 286/1222 cut-off events. [2021-10-15 20:02:42,388 INFO L130 PetriNetUnfolder]: For 19617/19668 co-relation queries the response was YES. [2021-10-15 20:02:42,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7827 conditions, 1222 events. 286/1222 cut-off events. For 19617/19668 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8441 event pairs, 76 based on Foata normal form. 10/1204 useless extension candidates. Maximal degree in co-relation 7718. Up to 334 conditions per place. [2021-10-15 20:02:42,404 INFO L132 encePairwiseOnDemand]: 112/134 looper letters, 137 selfloop transitions, 194 changer transitions 43/449 dead transitions. [2021-10-15 20:02:42,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 449 transitions, 8409 flow [2021-10-15 20:02:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:02:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:02:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1890 transitions. [2021-10-15 20:02:42,406 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641112618724559 [2021-10-15 20:02:42,406 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1890 transitions. [2021-10-15 20:02:42,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1890 transitions. [2021-10-15 20:02:42,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:42,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1890 transitions. [2021-10-15 20:02:42,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.9090909090909) internal successors, (1890), 22 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:42,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:42,410 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:42,410 INFO L186 Difference]: Start difference. First operand has 384 places, 388 transitions, 7095 flow. Second operand 22 states and 1890 transitions. [2021-10-15 20:02:42,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 449 transitions, 8409 flow [2021-10-15 20:02:42,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 449 transitions, 7895 flow, removed 47 selfloop flow, removed 32 redundant places. [2021-10-15 20:02:42,556 INFO L242 Difference]: Finished difference. Result has 369 places, 371 transitions, 6882 flow [2021-10-15 20:02:42,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6882, PETRI_PLACES=369, PETRI_TRANSITIONS=371} [2021-10-15 20:02:42,557 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 246 predicate places. [2021-10-15 20:02:42,557 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 371 transitions, 6882 flow [2021-10-15 20:02:42,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:42,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:42,558 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:42,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-10-15 20:02:42,558 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash 582614026, now seen corresponding path program 38 times [2021-10-15 20:02:42,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:42,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148496764] [2021-10-15 20:02:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:42,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:42,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:42,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148496764] [2021-10-15 20:02:42,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148496764] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:42,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:42,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:42,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112749814] [2021-10-15 20:02:42,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:42,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:42,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:42,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:42,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:42,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 371 transitions, 6882 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:42,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:42,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:42,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:43,493 INFO L129 PetriNetUnfolder]: 276/1206 cut-off events. [2021-10-15 20:02:43,493 INFO L130 PetriNetUnfolder]: For 19359/19408 co-relation queries the response was YES. [2021-10-15 20:02:43,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8120 conditions, 1206 events. 276/1206 cut-off events. For 19359/19408 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8094 event pairs, 54 based on Foata normal form. 2/1189 useless extension candidates. Maximal degree in co-relation 8018. Up to 575 conditions per place. [2021-10-15 20:02:43,510 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 261 selfloop transitions, 86 changer transitions 26/448 dead transitions. [2021-10-15 20:02:43,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 448 transitions, 8962 flow [2021-10-15 20:02:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1712 transitions. [2021-10-15 20:02:43,511 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6388059701492538 [2021-10-15 20:02:43,511 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1712 transitions. [2021-10-15 20:02:43,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1712 transitions. [2021-10-15 20:02:43,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:43,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1712 transitions. [2021-10-15 20:02:43,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 85.6) internal successors, (1712), 20 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:43,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:43,515 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:43,515 INFO L186 Difference]: Start difference. First operand has 369 places, 371 transitions, 6882 flow. Second operand 20 states and 1712 transitions. [2021-10-15 20:02:43,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 448 transitions, 8962 flow [2021-10-15 20:02:43,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 448 transitions, 8038 flow, removed 93 selfloop flow, removed 34 redundant places. [2021-10-15 20:02:43,658 INFO L242 Difference]: Finished difference. Result has 350 places, 402 transitions, 7107 flow [2021-10-15 20:02:43,659 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7107, PETRI_PLACES=350, PETRI_TRANSITIONS=402} [2021-10-15 20:02:43,659 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 227 predicate places. [2021-10-15 20:02:43,659 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 402 transitions, 7107 flow [2021-10-15 20:02:43,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:43,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:43,660 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:43,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-10-15 20:02:43,660 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash 7374286, now seen corresponding path program 39 times [2021-10-15 20:02:43,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:43,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522184978] [2021-10-15 20:02:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:43,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:43,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:43,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522184978] [2021-10-15 20:02:43,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522184978] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:43,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:43,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:43,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564558019] [2021-10-15 20:02:43,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:43,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:43,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:43,881 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:43,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 402 transitions, 7107 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:43,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:43,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:43,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:44,937 INFO L129 PetriNetUnfolder]: 293/1197 cut-off events. [2021-10-15 20:02:44,937 INFO L130 PetriNetUnfolder]: For 15792/15837 co-relation queries the response was YES. [2021-10-15 20:02:44,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7729 conditions, 1197 events. 293/1197 cut-off events. For 15792/15837 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7999 event pairs, 69 based on Foata normal form. 2/1173 useless extension candidates. Maximal degree in co-relation 7633. Up to 398 conditions per place. [2021-10-15 20:02:44,961 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 268 selfloop transitions, 121 changer transitions 30/494 dead transitions. [2021-10-15 20:02:44,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 494 transitions, 8927 flow [2021-10-15 20:02:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-15 20:02:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-15 20:02:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2063 transitions. [2021-10-15 20:02:44,964 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6414800995024875 [2021-10-15 20:02:44,964 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2063 transitions. [2021-10-15 20:02:44,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2063 transitions. [2021-10-15 20:02:44,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:44,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2063 transitions. [2021-10-15 20:02:44,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.95833333333333) internal successors, (2063), 24 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:44,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 134.0) internal successors, (3350), 25 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:44,971 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 134.0) internal successors, (3350), 25 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:44,971 INFO L186 Difference]: Start difference. First operand has 350 places, 402 transitions, 7107 flow. Second operand 24 states and 2063 transitions. [2021-10-15 20:02:44,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 494 transitions, 8927 flow [2021-10-15 20:02:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 494 transitions, 8679 flow, removed 42 selfloop flow, removed 13 redundant places. [2021-10-15 20:02:45,101 INFO L242 Difference]: Finished difference. Result has 361 places, 397 transitions, 7201 flow [2021-10-15 20:02:45,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6909, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7201, PETRI_PLACES=361, PETRI_TRANSITIONS=397} [2021-10-15 20:02:45,102 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 238 predicate places. [2021-10-15 20:02:45,102 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 397 transitions, 7201 flow [2021-10-15 20:02:45,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:45,102 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:45,102 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:45,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-10-15 20:02:45,103 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1271152184, now seen corresponding path program 40 times [2021-10-15 20:02:45,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:45,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863079326] [2021-10-15 20:02:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:45,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:45,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:45,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863079326] [2021-10-15 20:02:45,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863079326] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:45,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:45,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:45,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135256560] [2021-10-15 20:02:45,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:45,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:45,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:45,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:45,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 397 transitions, 7201 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:45,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:45,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:45,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:46,304 INFO L129 PetriNetUnfolder]: 313/1333 cut-off events. [2021-10-15 20:02:46,304 INFO L130 PetriNetUnfolder]: For 18173/18233 co-relation queries the response was YES. [2021-10-15 20:02:46,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8343 conditions, 1333 events. 313/1333 cut-off events. For 18173/18233 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9475 event pairs, 86 based on Foata normal form. 2/1301 useless extension candidates. Maximal degree in co-relation 8249. Up to 294 conditions per place. [2021-10-15 20:02:46,318 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 178 selfloop transitions, 177 changer transitions 44/474 dead transitions. [2021-10-15 20:02:46,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 474 transitions, 8851 flow [2021-10-15 20:02:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-15 20:02:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-15 20:02:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2227 transitions. [2021-10-15 20:02:46,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392078071182549 [2021-10-15 20:02:46,320 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2227 transitions. [2021-10-15 20:02:46,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2227 transitions. [2021-10-15 20:02:46,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:46,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2227 transitions. [2021-10-15 20:02:46,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 85.65384615384616) internal successors, (2227), 26 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:46,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 134.0) internal successors, (3618), 27 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:46,324 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 134.0) internal successors, (3618), 27 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:46,324 INFO L186 Difference]: Start difference. First operand has 361 places, 397 transitions, 7201 flow. Second operand 26 states and 2227 transitions. [2021-10-15 20:02:46,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 474 transitions, 8851 flow [2021-10-15 20:02:46,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 474 transitions, 8565 flow, removed 110 selfloop flow, removed 13 redundant places. [2021-10-15 20:02:46,454 INFO L242 Difference]: Finished difference. Result has 375 places, 385 transitions, 7233 flow [2021-10-15 20:02:46,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6982, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7233, PETRI_PLACES=375, PETRI_TRANSITIONS=385} [2021-10-15 20:02:46,455 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 252 predicate places. [2021-10-15 20:02:46,455 INFO L470 AbstractCegarLoop]: Abstraction has has 375 places, 385 transitions, 7233 flow [2021-10-15 20:02:46,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:46,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:46,455 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:46,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-10-15 20:02:46,455 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1203522988, now seen corresponding path program 41 times [2021-10-15 20:02:46,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:46,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938084408] [2021-10-15 20:02:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:46,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:46,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:46,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938084408] [2021-10-15 20:02:46,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938084408] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:46,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:46,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-15 20:02:46,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055089623] [2021-10-15 20:02:46,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:02:46,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:02:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:02:46,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:46,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 385 transitions, 7233 flow. Second operand has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:46,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:46,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:46,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:47,341 INFO L129 PetriNetUnfolder]: 312/1408 cut-off events. [2021-10-15 20:02:47,342 INFO L130 PetriNetUnfolder]: For 19107/19170 co-relation queries the response was YES. [2021-10-15 20:02:47,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8508 conditions, 1408 events. 312/1408 cut-off events. For 19107/19170 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10555 event pairs, 115 based on Foata normal form. 7/1379 useless extension candidates. Maximal degree in co-relation 8411. Up to 475 conditions per place. [2021-10-15 20:02:47,360 INFO L132 encePairwiseOnDemand]: 111/134 looper letters, 190 selfloop transitions, 155 changer transitions 39/459 dead transitions. [2021-10-15 20:02:47,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 459 transitions, 8982 flow [2021-10-15 20:02:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:02:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:02:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1643 transitions. [2021-10-15 20:02:47,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6453260015710919 [2021-10-15 20:02:47,362 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1643 transitions. [2021-10-15 20:02:47,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1643 transitions. [2021-10-15 20:02:47,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:47,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1643 transitions. [2021-10-15 20:02:47,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 86.47368421052632) internal successors, (1643), 19 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:47,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:47,365 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:47,365 INFO L186 Difference]: Start difference. First operand has 375 places, 385 transitions, 7233 flow. Second operand 19 states and 1643 transitions. [2021-10-15 20:02:47,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 459 transitions, 8982 flow [2021-10-15 20:02:47,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 459 transitions, 8566 flow, removed 94 selfloop flow, removed 18 redundant places. [2021-10-15 20:02:47,505 INFO L242 Difference]: Finished difference. Result has 376 places, 375 transitions, 7044 flow [2021-10-15 20:02:47,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7044, PETRI_PLACES=376, PETRI_TRANSITIONS=375} [2021-10-15 20:02:47,506 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 253 predicate places. [2021-10-15 20:02:47,506 INFO L470 AbstractCegarLoop]: Abstraction has has 376 places, 375 transitions, 7044 flow [2021-10-15 20:02:47,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:47,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:47,506 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:47,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-10-15 20:02:47,506 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash 700874326, now seen corresponding path program 42 times [2021-10-15 20:02:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:47,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871047104] [2021-10-15 20:02:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:47,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:47,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:47,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871047104] [2021-10-15 20:02:47,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871047104] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:47,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:47,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:47,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865133745] [2021-10-15 20:02:47,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:47,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:47,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:47,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:47,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:47,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 375 transitions, 7044 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:47,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:47,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:47,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:48,393 INFO L129 PetriNetUnfolder]: 287/1266 cut-off events. [2021-10-15 20:02:48,394 INFO L130 PetriNetUnfolder]: For 16836/16896 co-relation queries the response was YES. [2021-10-15 20:02:48,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7857 conditions, 1266 events. 287/1266 cut-off events. For 16836/16896 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8931 event pairs, 86 based on Foata normal form. 2/1238 useless extension candidates. Maximal degree in co-relation 7762. Up to 438 conditions per place. [2021-10-15 20:02:48,412 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 186 selfloop transitions, 132 changer transitions 26/419 dead transitions. [2021-10-15 20:02:48,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 419 transitions, 8046 flow [2021-10-15 20:02:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1715 transitions. [2021-10-15 20:02:48,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6399253731343284 [2021-10-15 20:02:48,414 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1715 transitions. [2021-10-15 20:02:48,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1715 transitions. [2021-10-15 20:02:48,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:48,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1715 transitions. [2021-10-15 20:02:48,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 85.75) internal successors, (1715), 20 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:48,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:48,418 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:48,418 INFO L186 Difference]: Start difference. First operand has 376 places, 375 transitions, 7044 flow. Second operand 20 states and 1715 transitions. [2021-10-15 20:02:48,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 419 transitions, 8046 flow [2021-10-15 20:02:48,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 419 transitions, 7820 flow, removed 39 selfloop flow, removed 13 redundant places. [2021-10-15 20:02:48,558 INFO L242 Difference]: Finished difference. Result has 382 places, 368 transitions, 6968 flow [2021-10-15 20:02:48,559 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6968, PETRI_PLACES=382, PETRI_TRANSITIONS=368} [2021-10-15 20:02:48,559 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 259 predicate places. [2021-10-15 20:02:48,559 INFO L470 AbstractCegarLoop]: Abstraction has has 382 places, 368 transitions, 6968 flow [2021-10-15 20:02:48,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:48,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:48,560 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:48,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-10-15 20:02:48,560 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:48,560 INFO L82 PathProgramCache]: Analyzing trace with hash 334521660, now seen corresponding path program 43 times [2021-10-15 20:02:48,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:48,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652098753] [2021-10-15 20:02:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:48,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:48,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:48,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652098753] [2021-10-15 20:02:48,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652098753] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:48,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:48,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-15 20:02:48,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410600785] [2021-10-15 20:02:48,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:02:48,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:02:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:02:48,807 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:48,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 368 transitions, 6968 flow. Second operand has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:48,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:48,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:48,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:49,554 INFO L129 PetriNetUnfolder]: 271/1232 cut-off events. [2021-10-15 20:02:49,555 INFO L130 PetriNetUnfolder]: For 18590/18643 co-relation queries the response was YES. [2021-10-15 20:02:49,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7638 conditions, 1232 events. 271/1232 cut-off events. For 18590/18643 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8642 event pairs, 130 based on Foata normal form. 4/1198 useless extension candidates. Maximal degree in co-relation 7543. Up to 552 conditions per place. [2021-10-15 20:02:49,569 INFO L132 encePairwiseOnDemand]: 117/134 looper letters, 162 selfloop transitions, 86 changer transitions 56/379 dead transitions. [2021-10-15 20:02:49,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 379 transitions, 7574 flow [2021-10-15 20:02:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:02:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:02:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1608 transitions. [2021-10-15 20:02:49,571 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2021-10-15 20:02:49,571 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1608 transitions. [2021-10-15 20:02:49,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1608 transitions. [2021-10-15 20:02:49,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:49,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1608 transitions. [2021-10-15 20:02:49,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 84.63157894736842) internal successors, (1608), 19 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:49,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:49,577 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:49,577 INFO L186 Difference]: Start difference. First operand has 382 places, 368 transitions, 6968 flow. Second operand 19 states and 1608 transitions. [2021-10-15 20:02:49,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 379 transitions, 7574 flow [2021-10-15 20:02:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 379 transitions, 7321 flow, removed 22 selfloop flow, removed 17 redundant places. [2021-10-15 20:02:49,699 INFO L242 Difference]: Finished difference. Result has 378 places, 323 transitions, 5904 flow [2021-10-15 20:02:49,700 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=6648, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5904, PETRI_PLACES=378, PETRI_TRANSITIONS=323} [2021-10-15 20:02:49,700 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 255 predicate places. [2021-10-15 20:02:49,700 INFO L470 AbstractCegarLoop]: Abstraction has has 378 places, 323 transitions, 5904 flow [2021-10-15 20:02:49,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:49,701 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:49,701 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:49,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-10-15 20:02:49,701 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:49,702 INFO L82 PathProgramCache]: Analyzing trace with hash 522297430, now seen corresponding path program 44 times [2021-10-15 20:02:49,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:49,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628048542] [2021-10-15 20:02:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:49,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:49,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:49,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628048542] [2021-10-15 20:02:49,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628048542] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:49,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:49,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:49,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850021986] [2021-10-15 20:02:49,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:49,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:49,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:49,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:49,895 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:49,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 323 transitions, 5904 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:49,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:49,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:49,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:50,570 INFO L129 PetriNetUnfolder]: 247/1129 cut-off events. [2021-10-15 20:02:50,570 INFO L130 PetriNetUnfolder]: For 14905/14958 co-relation queries the response was YES. [2021-10-15 20:02:50,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6903 conditions, 1129 events. 247/1129 cut-off events. For 14905/14958 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7646 event pairs, 76 based on Foata normal form. 2/1104 useless extension candidates. Maximal degree in co-relation 6811. Up to 416 conditions per place. [2021-10-15 20:02:50,585 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 188 selfloop transitions, 110 changer transitions 30/403 dead transitions. [2021-10-15 20:02:50,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 403 transitions, 7474 flow [2021-10-15 20:02:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1817 transitions. [2021-10-15 20:02:50,587 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6457000710732054 [2021-10-15 20:02:50,587 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1817 transitions. [2021-10-15 20:02:50,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1817 transitions. [2021-10-15 20:02:50,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:50,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1817 transitions. [2021-10-15 20:02:50,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.52380952380952) internal successors, (1817), 21 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:50,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:50,591 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:50,591 INFO L186 Difference]: Start difference. First operand has 378 places, 323 transitions, 5904 flow. Second operand 21 states and 1817 transitions. [2021-10-15 20:02:50,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 403 transitions, 7474 flow [2021-10-15 20:02:50,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 403 transitions, 7136 flow, removed 42 selfloop flow, removed 20 redundant places. [2021-10-15 20:02:50,696 INFO L242 Difference]: Finished difference. Result has 374 places, 321 transitions, 5852 flow [2021-10-15 20:02:50,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=5649, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5852, PETRI_PLACES=374, PETRI_TRANSITIONS=321} [2021-10-15 20:02:50,697 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 251 predicate places. [2021-10-15 20:02:50,697 INFO L470 AbstractCegarLoop]: Abstraction has has 374 places, 321 transitions, 5852 flow [2021-10-15 20:02:50,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:50,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:50,697 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:50,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-10-15 20:02:50,697 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1162370442, now seen corresponding path program 45 times [2021-10-15 20:02:50,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:50,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138396650] [2021-10-15 20:02:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:50,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:50,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:50,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138396650] [2021-10-15 20:02:50,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138396650] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:50,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:50,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:50,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157503237] [2021-10-15 20:02:50,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:50,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:50,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:50,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:50,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 321 transitions, 5852 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:50,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:50,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:50,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:51,512 INFO L129 PetriNetUnfolder]: 241/1133 cut-off events. [2021-10-15 20:02:51,512 INFO L130 PetriNetUnfolder]: For 15473/15519 co-relation queries the response was YES. [2021-10-15 20:02:51,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6689 conditions, 1133 events. 241/1133 cut-off events. For 15473/15519 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7892 event pairs, 96 based on Foata normal form. 7/1110 useless extension candidates. Maximal degree in co-relation 6597. Up to 315 conditions per place. [2021-10-15 20:02:51,526 INFO L132 encePairwiseOnDemand]: 111/134 looper letters, 157 selfloop transitions, 101 changer transitions 52/385 dead transitions. [2021-10-15 20:02:51,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 385 transitions, 7087 flow [2021-10-15 20:02:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1730 transitions. [2021-10-15 20:02:51,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6455223880597015 [2021-10-15 20:02:51,528 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1730 transitions. [2021-10-15 20:02:51,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1730 transitions. [2021-10-15 20:02:51,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:51,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1730 transitions. [2021-10-15 20:02:51,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.5) internal successors, (1730), 20 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:51,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:51,532 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:51,532 INFO L186 Difference]: Start difference. First operand has 374 places, 321 transitions, 5852 flow. Second operand 20 states and 1730 transitions. [2021-10-15 20:02:51,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 385 transitions, 7087 flow [2021-10-15 20:02:51,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 385 transitions, 6870 flow, removed 36 selfloop flow, removed 18 redundant places. [2021-10-15 20:02:51,632 INFO L242 Difference]: Finished difference. Result has 375 places, 293 transitions, 5193 flow [2021-10-15 20:02:51,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=5553, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5193, PETRI_PLACES=375, PETRI_TRANSITIONS=293} [2021-10-15 20:02:51,633 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 252 predicate places. [2021-10-15 20:02:51,633 INFO L470 AbstractCegarLoop]: Abstraction has has 375 places, 293 transitions, 5193 flow [2021-10-15 20:02:51,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:51,633 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:51,633 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:51,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-10-15 20:02:51,634 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash -780445136, now seen corresponding path program 46 times [2021-10-15 20:02:51,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:51,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349915128] [2021-10-15 20:02:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:51,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:51,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:51,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349915128] [2021-10-15 20:02:51,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349915128] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:51,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:51,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:51,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456801042] [2021-10-15 20:02:51,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:51,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:51,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:51,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:51,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:51,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 293 transitions, 5193 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:51,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:51,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:51,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:52,421 INFO L129 PetriNetUnfolder]: 213/1069 cut-off events. [2021-10-15 20:02:52,421 INFO L130 PetriNetUnfolder]: For 14384/14432 co-relation queries the response was YES. [2021-10-15 20:02:52,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6345 conditions, 1069 events. 213/1069 cut-off events. For 14384/14432 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7218 event pairs, 59 based on Foata normal form. 4/1051 useless extension candidates. Maximal degree in co-relation 6255. Up to 449 conditions per place. [2021-10-15 20:02:52,435 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 170 selfloop transitions, 64 changer transitions 32/341 dead transitions. [2021-10-15 20:02:52,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 341 transitions, 6311 flow [2021-10-15 20:02:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:02:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:02:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1625 transitions. [2021-10-15 20:02:52,436 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6382560879811469 [2021-10-15 20:02:52,436 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1625 transitions. [2021-10-15 20:02:52,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1625 transitions. [2021-10-15 20:02:52,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:52,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1625 transitions. [2021-10-15 20:02:52,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.52631578947368) internal successors, (1625), 19 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:52,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:52,440 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:52,440 INFO L186 Difference]: Start difference. First operand has 375 places, 293 transitions, 5193 flow. Second operand 19 states and 1625 transitions. [2021-10-15 20:02:52,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 341 transitions, 6311 flow [2021-10-15 20:02:52,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 341 transitions, 5971 flow, removed 67 selfloop flow, removed 19 redundant places. [2021-10-15 20:02:52,539 INFO L242 Difference]: Finished difference. Result has 379 places, 293 transitions, 5115 flow [2021-10-15 20:02:52,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5115, PETRI_PLACES=379, PETRI_TRANSITIONS=293} [2021-10-15 20:02:52,539 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 256 predicate places. [2021-10-15 20:02:52,539 INFO L470 AbstractCegarLoop]: Abstraction has has 379 places, 293 transitions, 5115 flow [2021-10-15 20:02:52,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:52,540 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:52,540 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:52,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-10-15 20:02:52,540 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:52,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1629797792, now seen corresponding path program 47 times [2021-10-15 20:02:52,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:52,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820261190] [2021-10-15 20:02:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:52,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:52,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:52,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820261190] [2021-10-15 20:02:52,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820261190] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:52,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:52,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-15 20:02:52,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591760637] [2021-10-15 20:02:52,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:02:52,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:52,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:02:52,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:02:52,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:52,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 293 transitions, 5115 flow. Second operand has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:52,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:52,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:52,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:53,470 INFO L129 PetriNetUnfolder]: 192/971 cut-off events. [2021-10-15 20:02:53,470 INFO L130 PetriNetUnfolder]: For 13238/13280 co-relation queries the response was YES. [2021-10-15 20:02:53,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5670 conditions, 971 events. 192/971 cut-off events. For 13238/13280 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6269 event pairs, 50 based on Foata normal form. 8/961 useless extension candidates. Maximal degree in co-relation 5577. Up to 262 conditions per place. [2021-10-15 20:02:53,483 INFO L132 encePairwiseOnDemand]: 108/134 looper letters, 203 selfloop transitions, 67 changer transitions 32/377 dead transitions. [2021-10-15 20:02:53,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 377 transitions, 6277 flow [2021-10-15 20:02:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1838 transitions. [2021-10-15 20:02:53,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6531627576403696 [2021-10-15 20:02:53,485 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1838 transitions. [2021-10-15 20:02:53,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1838 transitions. [2021-10-15 20:02:53,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:53,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1838 transitions. [2021-10-15 20:02:53,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.52380952380952) internal successors, (1838), 21 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:53,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:53,489 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:53,489 INFO L186 Difference]: Start difference. First operand has 379 places, 293 transitions, 5115 flow. Second operand 21 states and 1838 transitions. [2021-10-15 20:02:53,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 377 transitions, 6277 flow [2021-10-15 20:02:53,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 377 transitions, 5813 flow, removed 61 selfloop flow, removed 24 redundant places. [2021-10-15 20:02:53,587 INFO L242 Difference]: Finished difference. Result has 371 places, 270 transitions, 4511 flow [2021-10-15 20:02:53,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4653, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4511, PETRI_PLACES=371, PETRI_TRANSITIONS=270} [2021-10-15 20:02:53,587 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 248 predicate places. [2021-10-15 20:02:53,588 INFO L470 AbstractCegarLoop]: Abstraction has has 371 places, 270 transitions, 4511 flow [2021-10-15 20:02:53,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.4375) internal successors, (1319), 16 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:53,588 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:53,588 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:53,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-10-15 20:02:53,589 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:53,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1648986478, now seen corresponding path program 48 times [2021-10-15 20:02:53,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:53,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320921964] [2021-10-15 20:02:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:53,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:53,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:53,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320921964] [2021-10-15 20:02:53,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320921964] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:53,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:53,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:53,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282403636] [2021-10-15 20:02:53,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:53,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:53,786 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:53,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 270 transitions, 4511 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:53,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:53,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:53,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:54,445 INFO L129 PetriNetUnfolder]: 200/947 cut-off events. [2021-10-15 20:02:54,445 INFO L130 PetriNetUnfolder]: For 11943/11980 co-relation queries the response was YES. [2021-10-15 20:02:54,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5402 conditions, 947 events. 200/947 cut-off events. For 11943/11980 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6094 event pairs, 76 based on Foata normal form. 4/921 useless extension candidates. Maximal degree in co-relation 5318. Up to 377 conditions per place. [2021-10-15 20:02:54,457 INFO L132 encePairwiseOnDemand]: 113/134 looper letters, 107 selfloop transitions, 63 changer transitions 49/294 dead transitions. [2021-10-15 20:02:54,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 294 transitions, 5081 flow [2021-10-15 20:02:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:02:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1778 transitions. [2021-10-15 20:02:54,459 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6318407960199005 [2021-10-15 20:02:54,459 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1778 transitions. [2021-10-15 20:02:54,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1778 transitions. [2021-10-15 20:02:54,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:54,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1778 transitions. [2021-10-15 20:02:54,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 84.66666666666667) internal successors, (1778), 21 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:54,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:54,465 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:54,465 INFO L186 Difference]: Start difference. First operand has 371 places, 270 transitions, 4511 flow. Second operand 21 states and 1778 transitions. [2021-10-15 20:02:54,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 294 transitions, 5081 flow [2021-10-15 20:02:54,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 294 transitions, 4851 flow, removed 20 selfloop flow, removed 26 redundant places. [2021-10-15 20:02:54,541 INFO L242 Difference]: Finished difference. Result has 353 places, 237 transitions, 3654 flow [2021-10-15 20:02:54,541 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3654, PETRI_PLACES=353, PETRI_TRANSITIONS=237} [2021-10-15 20:02:54,541 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 230 predicate places. [2021-10-15 20:02:54,541 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 237 transitions, 3654 flow [2021-10-15 20:02:54,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:54,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:54,542 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:54,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-10-15 20:02:54,542 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash -419873228, now seen corresponding path program 49 times [2021-10-15 20:02:54,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:54,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323518891] [2021-10-15 20:02:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:54,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:54,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:54,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323518891] [2021-10-15 20:02:54,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323518891] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:54,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:54,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:54,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619719285] [2021-10-15 20:02:54,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:54,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:54,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:54,830 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:54,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 237 transitions, 3654 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:54,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:54,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:54,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:55,767 INFO L129 PetriNetUnfolder]: 183/922 cut-off events. [2021-10-15 20:02:55,767 INFO L130 PetriNetUnfolder]: For 11606/11629 co-relation queries the response was YES. [2021-10-15 20:02:55,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4986 conditions, 922 events. 183/922 cut-off events. For 11606/11629 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5937 event pairs, 101 based on Foata normal form. 14/908 useless extension candidates. Maximal degree in co-relation 4906. Up to 317 conditions per place. [2021-10-15 20:02:55,780 INFO L132 encePairwiseOnDemand]: 110/134 looper letters, 111 selfloop transitions, 48 changer transitions 59/293 dead transitions. [2021-10-15 20:02:55,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 293 transitions, 4700 flow [2021-10-15 20:02:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 20:02:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-15 20:02:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1954 transitions. [2021-10-15 20:02:55,783 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6340038935756003 [2021-10-15 20:02:55,783 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1954 transitions. [2021-10-15 20:02:55,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1954 transitions. [2021-10-15 20:02:55,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:55,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1954 transitions. [2021-10-15 20:02:55,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 84.95652173913044) internal successors, (1954), 23 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:55,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:55,790 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 134.0) internal successors, (3216), 24 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:55,790 INFO L186 Difference]: Start difference. First operand has 353 places, 237 transitions, 3654 flow. Second operand 23 states and 1954 transitions. [2021-10-15 20:02:55,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 293 transitions, 4700 flow [2021-10-15 20:02:55,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 293 transitions, 4024 flow, removed 61 selfloop flow, removed 42 redundant places. [2021-10-15 20:02:55,852 INFO L242 Difference]: Finished difference. Result has 342 places, 215 transitions, 2855 flow [2021-10-15 20:02:55,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2855, PETRI_PLACES=342, PETRI_TRANSITIONS=215} [2021-10-15 20:02:55,852 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 219 predicate places. [2021-10-15 20:02:55,852 INFO L470 AbstractCegarLoop]: Abstraction has has 342 places, 215 transitions, 2855 flow [2021-10-15 20:02:55,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:55,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:55,853 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:55,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-10-15 20:02:55,853 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:55,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1514498126, now seen corresponding path program 50 times [2021-10-15 20:02:55,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:55,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355428564] [2021-10-15 20:02:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:55,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:56,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:56,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355428564] [2021-10-15 20:02:56,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355428564] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:56,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:56,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:56,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935383002] [2021-10-15 20:02:56,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:56,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:56,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:56,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 215 transitions, 2855 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:56,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:56,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:56,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:56,527 INFO L129 PetriNetUnfolder]: 150/742 cut-off events. [2021-10-15 20:02:56,527 INFO L130 PetriNetUnfolder]: For 7239/7260 co-relation queries the response was YES. [2021-10-15 20:02:56,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3729 conditions, 742 events. 150/742 cut-off events. For 7239/7260 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4323 event pairs, 57 based on Foata normal form. 7/727 useless extension candidates. Maximal degree in co-relation 3643. Up to 283 conditions per place. [2021-10-15 20:02:56,535 INFO L132 encePairwiseOnDemand]: 112/134 looper letters, 93 selfloop transitions, 41 changer transitions 24/233 dead transitions. [2021-10-15 20:02:56,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 233 transitions, 3201 flow [2021-10-15 20:02:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 20:02:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 20:02:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1525 transitions. [2021-10-15 20:02:56,537 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6322553897180763 [2021-10-15 20:02:56,537 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1525 transitions. [2021-10-15 20:02:56,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1525 transitions. [2021-10-15 20:02:56,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:56,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1525 transitions. [2021-10-15 20:02:56,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.72222222222223) internal successors, (1525), 18 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:56,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 134.0) internal successors, (2546), 19 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:56,540 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 134.0) internal successors, (2546), 19 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:56,540 INFO L186 Difference]: Start difference. First operand has 342 places, 215 transitions, 2855 flow. Second operand 18 states and 1525 transitions. [2021-10-15 20:02:56,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 233 transitions, 3201 flow [2021-10-15 20:02:56,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 233 transitions, 2905 flow, removed 65 selfloop flow, removed 32 redundant places. [2021-10-15 20:02:56,579 INFO L242 Difference]: Finished difference. Result has 319 places, 201 transitions, 2409 flow [2021-10-15 20:02:56,580 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=2504, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2409, PETRI_PLACES=319, PETRI_TRANSITIONS=201} [2021-10-15 20:02:56,580 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 196 predicate places. [2021-10-15 20:02:56,580 INFO L470 AbstractCegarLoop]: Abstraction has has 319 places, 201 transitions, 2409 flow [2021-10-15 20:02:56,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:56,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:56,580 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:56,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-10-15 20:02:56,581 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:56,581 INFO L82 PathProgramCache]: Analyzing trace with hash 574439424, now seen corresponding path program 51 times [2021-10-15 20:02:56,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:56,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646525202] [2021-10-15 20:02:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:56,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:56,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:56,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646525202] [2021-10-15 20:02:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646525202] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:56,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:56,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-15 20:02:56,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515665461] [2021-10-15 20:02:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:02:56,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:56,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:02:56,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:02:56,739 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:56,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 201 transitions, 2409 flow. Second operand has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:56,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:56,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:56,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:57,111 INFO L129 PetriNetUnfolder]: 144/713 cut-off events. [2021-10-15 20:02:57,111 INFO L130 PetriNetUnfolder]: For 6107/6129 co-relation queries the response was YES. [2021-10-15 20:02:57,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3433 conditions, 713 events. 144/713 cut-off events. For 6107/6129 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4023 event pairs, 53 based on Foata normal form. 5/699 useless extension candidates. Maximal degree in co-relation 3361. Up to 267 conditions per place. [2021-10-15 20:02:57,118 INFO L132 encePairwiseOnDemand]: 112/134 looper letters, 89 selfloop transitions, 46 changer transitions 30/240 dead transitions. [2021-10-15 20:02:57,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 240 transitions, 3095 flow [2021-10-15 20:02:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:02:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:02:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1613 transitions. [2021-10-15 20:02:57,119 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6335428122545169 [2021-10-15 20:02:57,119 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1613 transitions. [2021-10-15 20:02:57,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1613 transitions. [2021-10-15 20:02:57,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:57,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1613 transitions. [2021-10-15 20:02:57,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 84.89473684210526) internal successors, (1613), 19 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,123 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,123 INFO L186 Difference]: Start difference. First operand has 319 places, 201 transitions, 2409 flow. Second operand 19 states and 1613 transitions. [2021-10-15 20:02:57,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 240 transitions, 3095 flow [2021-10-15 20:02:57,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 240 transitions, 2836 flow, removed 23 selfloop flow, removed 24 redundant places. [2021-10-15 20:02:57,155 INFO L242 Difference]: Finished difference. Result has 307 places, 197 transitions, 2257 flow [2021-10-15 20:02:57,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2257, PETRI_PLACES=307, PETRI_TRANSITIONS=197} [2021-10-15 20:02:57,155 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 184 predicate places. [2021-10-15 20:02:57,156 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 197 transitions, 2257 flow [2021-10-15 20:02:57,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,156 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:57,156 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:57,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-10-15 20:02:57,156 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1918320990, now seen corresponding path program 52 times [2021-10-15 20:02:57,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:57,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010985437] [2021-10-15 20:02:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:57,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:57,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:57,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010985437] [2021-10-15 20:02:57,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010985437] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:57,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:57,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:02:57,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146967823] [2021-10-15 20:02:57,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:02:57,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:02:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:02:57,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:57,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 197 transitions, 2257 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:57,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:57,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:57,808 INFO L129 PetriNetUnfolder]: 140/703 cut-off events. [2021-10-15 20:02:57,808 INFO L130 PetriNetUnfolder]: For 5571/5590 co-relation queries the response was YES. [2021-10-15 20:02:57,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3222 conditions, 703 events. 140/703 cut-off events. For 5571/5590 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3956 event pairs, 60 based on Foata normal form. 4/692 useless extension candidates. Maximal degree in co-relation 3148. Up to 202 conditions per place. [2021-10-15 20:02:57,814 INFO L132 encePairwiseOnDemand]: 112/134 looper letters, 79 selfloop transitions, 49 changer transitions 29/232 dead transitions. [2021-10-15 20:02:57,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 232 transitions, 2770 flow [2021-10-15 20:02:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:02:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:02:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1620 transitions. [2021-10-15 20:02:57,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6362922230950511 [2021-10-15 20:02:57,816 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1620 transitions. [2021-10-15 20:02:57,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1620 transitions. [2021-10-15 20:02:57,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:57,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1620 transitions. [2021-10-15 20:02:57,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.26315789473684) internal successors, (1620), 19 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,819 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 134.0) internal successors, (2680), 20 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,819 INFO L186 Difference]: Start difference. First operand has 307 places, 197 transitions, 2257 flow. Second operand 19 states and 1620 transitions. [2021-10-15 20:02:57,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 232 transitions, 2770 flow [2021-10-15 20:02:57,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 232 transitions, 2454 flow, removed 51 selfloop flow, removed 26 redundant places. [2021-10-15 20:02:57,850 INFO L242 Difference]: Finished difference. Result has 297 places, 186 transitions, 1939 flow [2021-10-15 20:02:57,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1939, PETRI_PLACES=297, PETRI_TRANSITIONS=186} [2021-10-15 20:02:57,850 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 174 predicate places. [2021-10-15 20:02:57,850 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 186 transitions, 1939 flow [2021-10-15 20:02:57,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:57,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:57,851 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:57,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-10-15 20:02:57,851 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash -478429256, now seen corresponding path program 53 times [2021-10-15 20:02:57,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:57,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974387990] [2021-10-15 20:02:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:57,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:58,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:58,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974387990] [2021-10-15 20:02:58,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974387990] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:58,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:58,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:58,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204028375] [2021-10-15 20:02:58,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:58,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:58,103 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:58,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 186 transitions, 1939 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:58,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:58,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:58,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:58,785 INFO L129 PetriNetUnfolder]: 113/654 cut-off events. [2021-10-15 20:02:58,785 INFO L130 PetriNetUnfolder]: For 3998/4018 co-relation queries the response was YES. [2021-10-15 20:02:58,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2759 conditions, 654 events. 113/654 cut-off events. For 3998/4018 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3495 event pairs, 23 based on Foata normal form. 4/648 useless extension candidates. Maximal degree in co-relation 2691. Up to 150 conditions per place. [2021-10-15 20:02:58,791 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 89 selfloop transitions, 38 changer transitions 25/227 dead transitions. [2021-10-15 20:02:58,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 227 transitions, 2476 flow [2021-10-15 20:02:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:02:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:02:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1865 transitions. [2021-10-15 20:02:58,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6326322930800543 [2021-10-15 20:02:58,796 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1865 transitions. [2021-10-15 20:02:58,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1865 transitions. [2021-10-15 20:02:58,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:58,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1865 transitions. [2021-10-15 20:02:58,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 84.77272727272727) internal successors, (1865), 22 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:58,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:58,804 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:58,804 INFO L186 Difference]: Start difference. First operand has 297 places, 186 transitions, 1939 flow. Second operand 22 states and 1865 transitions. [2021-10-15 20:02:58,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 227 transitions, 2476 flow [2021-10-15 20:02:58,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 227 transitions, 2141 flow, removed 27 selfloop flow, removed 33 redundant places. [2021-10-15 20:02:58,843 INFO L242 Difference]: Finished difference. Result has 282 places, 177 transitions, 1586 flow [2021-10-15 20:02:58,844 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1586, PETRI_PLACES=282, PETRI_TRANSITIONS=177} [2021-10-15 20:02:58,844 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 159 predicate places. [2021-10-15 20:02:58,844 INFO L470 AbstractCegarLoop]: Abstraction has has 282 places, 177 transitions, 1586 flow [2021-10-15 20:02:58,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:58,845 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:58,845 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:58,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-10-15 20:02:58,845 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:58,846 INFO L82 PathProgramCache]: Analyzing trace with hash 434521806, now seen corresponding path program 54 times [2021-10-15 20:02:58,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:58,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346341164] [2021-10-15 20:02:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:58,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:59,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:59,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346341164] [2021-10-15 20:02:59,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346341164] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:02:59,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:02:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:02:59,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965393683] [2021-10-15 20:02:59,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:02:59,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:59,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:02:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:02:59,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:02:59,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 177 transitions, 1586 flow. Second operand has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:59,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:02:59,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:02:59,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:02:59,869 INFO L129 PetriNetUnfolder]: 102/506 cut-off events. [2021-10-15 20:02:59,869 INFO L130 PetriNetUnfolder]: For 2760/2766 co-relation queries the response was YES. [2021-10-15 20:02:59,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 506 events. 102/506 cut-off events. For 2760/2766 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2262 event pairs, 22 based on Foata normal form. 2/499 useless extension candidates. Maximal degree in co-relation 2092. Up to 111 conditions per place. [2021-10-15 20:02:59,874 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 81 selfloop transitions, 23 changer transitions 43/222 dead transitions. [2021-10-15 20:02:59,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 222 transitions, 2008 flow [2021-10-15 20:02:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:02:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:02:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1719 transitions. [2021-10-15 20:02:59,876 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6414179104477612 [2021-10-15 20:02:59,876 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1719 transitions. [2021-10-15 20:02:59,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1719 transitions. [2021-10-15 20:02:59,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:02:59,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1719 transitions. [2021-10-15 20:02:59,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 85.95) internal successors, (1719), 20 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:59,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:59,881 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 134.0) internal successors, (2814), 21 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:59,881 INFO L186 Difference]: Start difference. First operand has 282 places, 177 transitions, 1586 flow. Second operand 20 states and 1719 transitions. [2021-10-15 20:02:59,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 222 transitions, 2008 flow [2021-10-15 20:02:59,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 222 transitions, 1804 flow, removed 32 selfloop flow, removed 28 redundant places. [2021-10-15 20:02:59,899 INFO L242 Difference]: Finished difference. Result has 266 places, 140 transitions, 946 flow [2021-10-15 20:02:59,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=946, PETRI_PLACES=266, PETRI_TRANSITIONS=140} [2021-10-15 20:02:59,900 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 143 predicate places. [2021-10-15 20:02:59,900 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 140 transitions, 946 flow [2021-10-15 20:02:59,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:02:59,900 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:02:59,901 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:59,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-10-15 20:02:59,901 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:02:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1755358632, now seen corresponding path program 2 times [2021-10-15 20:02:59,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:59,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663711966] [2021-10-15 20:02:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:59,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:03:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:03:00,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:03:00,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663711966] [2021-10-15 20:03:00,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663711966] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:03:00,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:03:00,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 20:03:00,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578042253] [2021-10-15 20:03:00,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:03:00,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:03:00,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:03:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:03:00,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:03:00,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 140 transitions, 946 flow. Second operand has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:00,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:03:00,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:03:00,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:03:00,504 INFO L129 PetriNetUnfolder]: 62/384 cut-off events. [2021-10-15 20:03:00,504 INFO L130 PetriNetUnfolder]: For 1760/1771 co-relation queries the response was YES. [2021-10-15 20:03:00,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 384 events. 62/384 cut-off events. For 1760/1771 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1551 event pairs, 15 based on Foata normal form. 9/377 useless extension candidates. Maximal degree in co-relation 1365. Up to 41 conditions per place. [2021-10-15 20:03:00,507 INFO L132 encePairwiseOnDemand]: 109/134 looper letters, 25 selfloop transitions, 20 changer transitions 80/196 dead transitions. [2021-10-15 20:03:00,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 196 transitions, 1476 flow [2021-10-15 20:03:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-15 20:03:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-15 20:03:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2516 transitions. [2021-10-15 20:03:00,510 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6258706467661691 [2021-10-15 20:03:00,510 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2516 transitions. [2021-10-15 20:03:00,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2516 transitions. [2021-10-15 20:03:00,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:03:00,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2516 transitions. [2021-10-15 20:03:00,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 83.86666666666666) internal successors, (2516), 30 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:00,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 134.0) internal successors, (4154), 31 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:00,517 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 134.0) internal successors, (4154), 31 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:00,517 INFO L186 Difference]: Start difference. First operand has 266 places, 140 transitions, 946 flow. Second operand 30 states and 2516 transitions. [2021-10-15 20:03:00,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 196 transitions, 1476 flow [2021-10-15 20:03:00,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 196 transitions, 1014 flow, removed 45 selfloop flow, removed 61 redundant places. [2021-10-15 20:03:00,525 INFO L242 Difference]: Finished difference. Result has 210 places, 116 transitions, 431 flow [2021-10-15 20:03:00,526 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=431, PETRI_PLACES=210, PETRI_TRANSITIONS=116} [2021-10-15 20:03:00,526 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 87 predicate places. [2021-10-15 20:03:00,526 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 116 transitions, 431 flow [2021-10-15 20:03:00,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.6) internal successors, (1239), 15 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:00,526 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:03:00,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:03:00,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-10-15 20:03:00,527 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-15 20:03:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:03:00,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2092476576, now seen corresponding path program 55 times [2021-10-15 20:03:00,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:03:00,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312615101] [2021-10-15 20:03:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:03:00,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:03:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:03:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:03:00,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:03:00,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312615101] [2021-10-15 20:03:00,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312615101] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:03:00,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:03:00,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-10-15 20:03:00,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095158535] [2021-10-15 20:03:00,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-15 20:03:00,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:03:00,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-15 20:03:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-15 20:03:00,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2021-10-15 20:03:00,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 116 transitions, 431 flow. Second operand has 18 states, 18 states have (on average 82.16666666666667) internal successors, (1479), 18 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:00,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:03:00,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2021-10-15 20:03:00,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:03:01,344 INFO L129 PetriNetUnfolder]: 9/107 cut-off events. [2021-10-15 20:03:01,344 INFO L130 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2021-10-15 20:03:01,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 107 events. 9/107 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 100 event pairs, 4 based on Foata normal form. 2/106 useless extension candidates. Maximal degree in co-relation 240. Up to 16 conditions per place. [2021-10-15 20:03:01,345 INFO L132 encePairwiseOnDemand]: 112/134 looper letters, 0 selfloop transitions, 0 changer transitions 94/94 dead transitions. [2021-10-15 20:03:01,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 94 transitions, 408 flow [2021-10-15 20:03:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:03:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:03:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1799 transitions. [2021-10-15 20:03:01,348 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6102442333785617 [2021-10-15 20:03:01,349 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1799 transitions. [2021-10-15 20:03:01,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1799 transitions. [2021-10-15 20:03:01,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:03:01,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1799 transitions. [2021-10-15 20:03:01,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 81.77272727272727) internal successors, (1799), 22 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:01,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:01,354 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:01,354 INFO L186 Difference]: Start difference. First operand has 210 places, 116 transitions, 431 flow. Second operand 22 states and 1799 transitions. [2021-10-15 20:03:01,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 94 transitions, 408 flow [2021-10-15 20:03:01,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 94 transitions, 286 flow, removed 10 selfloop flow, removed 44 redundant places. [2021-10-15 20:03:01,356 INFO L242 Difference]: Finished difference. Result has 131 places, 0 transitions, 0 flow [2021-10-15 20:03:01,357 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=0, PETRI_PLACES=131, PETRI_TRANSITIONS=0} [2021-10-15 20:03:01,357 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 8 predicate places. [2021-10-15 20:03:01,357 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 0 transitions, 0 flow [2021-10-15 20:03:01,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.16666666666667) internal successors, (1479), 18 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:03:01,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:03:01,361 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-15 20:03:01,361 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-15 20:03:01,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-10-15 20:03:01,366 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-15 20:03:01,367 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:03:01,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:03:01 BasicIcfg [2021-10-15 20:03:01,369 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:03:01,370 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:03:01,370 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:03:01,370 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:03:01,371 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:01:51" (3/4) ... [2021-10-15 20:03:01,374 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:03:01,382 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-15 20:03:01,382 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-15 20:03:01,388 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-15 20:03:01,388 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:03:01,388 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:03:01,389 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:03:01,427 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:03:01,428 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:03:01,429 INFO L168 Benchmark]: Toolchain (without parser) took 70937.22 ms. Allocated memory was 107.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 70.0 MB in the beginning and 814.4 MB in the end (delta: -744.4 MB). Peak memory consumption was 325.8 MB. Max. memory is 16.1 GB. [2021-10-15 20:03:01,430 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:03:01,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.45 ms. Allocated memory is still 107.0 MB. Free memory was 69.8 MB in the beginning and 83.2 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:03:01,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.70 ms. Allocated memory is still 107.0 MB. Free memory was 83.2 MB in the beginning and 81.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:03:01,431 INFO L168 Benchmark]: Boogie Preprocessor took 50.78 ms. Allocated memory is still 107.0 MB. Free memory was 81.3 MB in the beginning and 80.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:03:01,431 INFO L168 Benchmark]: RCFGBuilder took 412.05 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 67.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:03:01,432 INFO L168 Benchmark]: TraceAbstraction took 70008.70 ms. Allocated memory was 107.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 66.8 MB in the beginning and 817.5 MB in the end (delta: -750.8 MB). Peak memory consumption was 320.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:03:01,432 INFO L168 Benchmark]: Witness Printer took 57.98 ms. Allocated memory is still 1.2 GB. Free memory was 817.5 MB in the beginning and 814.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:03:01,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 331.45 ms. Allocated memory is still 107.0 MB. Free memory was 69.8 MB in the beginning and 83.2 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.70 ms. Allocated memory is still 107.0 MB. Free memory was 83.2 MB in the beginning and 81.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.78 ms. Allocated memory is still 107.0 MB. Free memory was 81.3 MB in the beginning and 80.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 412.05 ms. Allocated memory is still 107.0 MB. Free memory was 79.8 MB in the beginning and 67.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 70008.70 ms. Allocated memory was 107.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 66.8 MB in the beginning and 817.5 MB in the end (delta: -750.8 MB). Peak memory consumption was 320.5 MB. Max. memory is 16.1 GB. * Witness Printer took 57.98 ms. Allocated memory is still 1.2 GB. Free memory was 817.5 MB in the beginning and 814.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 94]: 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 with 1 thread instances CFG has 5 procedures, 181 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 78.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 69769.3ms, OverallIterations: 63, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 55159.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 122.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3092 SDtfs, 7228 SDslu, 20004 SDs, 0 SdLazy, 22945 SolverSat, 1490 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10783.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1698 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 1513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6169 ImplicationChecksByTransitivity, 18159.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7526occurred in iteration=41, InterpolantAutomatonStates: 1217, 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: 178.8ms SsaConstructionTime, 1457.6ms SatisfiabilityAnalysisTime, 12089.9ms InterpolantComputationTime, 6804 NumberOfCodeBlocks, 6804 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 6741 ConstructedInterpolants, 0 QuantifiedInterpolants, 23887 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 63 InterpolantComputations, 63 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:03:01,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9262555-ed66-4398-8c4a-9dc289aa02ef/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...