./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:53:07,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:53:07,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:53:07,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:53:07,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:53:07,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:53:07,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:53:07,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:53:07,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:53:07,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:53:07,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:53:07,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:53:07,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:53:07,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:53:07,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:53:07,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:53:07,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:53:07,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:53:07,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:53:07,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:53:07,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:53:07,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:53:07,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:53:07,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:53:07,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:53:07,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:53:07,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:53:07,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:53:07,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:53:07,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:53:07,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:53:07,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:53:07,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:53:07,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:53:07,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:53:07,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:53:07,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:53:07,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:53:07,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:53:07,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:53:07,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:53:07,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 13:53:07,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:53:07,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:53:07,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:53:07,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:53:07,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:53:07,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:53:07,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:53:07,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:53:07,230 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:53:07,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:53:07,230 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:53:07,230 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:53:07,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:53:07,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:53:07,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:53:07,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:53:07,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:53:07,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:53:07,232 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 13:53:07,232 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:53:07,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:53:07,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:53:07,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:53:07,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:53:07,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:53:07,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:53:07,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:53:07,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:53:07,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:53:07,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:53:07,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:53:07,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:53:07,234 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:53:07,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:53:07,235 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:53:07,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:53:07,235 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:53:07,235 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-12-13 13:53:07,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:53:07,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:53:07,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:53:07,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:53:07,427 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:53:07,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-12-13 13:53:10,101 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:53:10,282 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:53:10,282 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-12-13 13:53:10,292 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/data/de442e851/b74f1fff2bb848ef8f70320d04c74b50/FLAG7661dece9 [2022-12-13 13:53:10,302 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/data/de442e851/b74f1fff2bb848ef8f70320d04c74b50 [2022-12-13 13:53:10,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:53:10,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:53:10,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:53:10,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:53:10,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:53:10,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d137ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10, skipping insertion in model container [2022-12-13 13:53:10,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:53:10,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:53:10,442 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:53:10,635 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-12-13 13:53:10,637 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-12-13 13:53:10,638 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-12-13 13:53:10,685 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-12-13 13:53:10,686 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-12-13 13:53:10,688 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-12-13 13:53:10,688 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-12-13 13:53:10,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:53:10,700 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:53:10,708 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 13:53:10,724 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-12-13 13:53:10,725 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-12-13 13:53:10,725 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-12-13 13:53:10,733 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-12-13 13:53:10,734 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-12-13 13:53:10,735 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-12-13 13:53:10,735 WARN L237 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_d76e6886-8034-4044-849e-530b53c4bacb/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-12-13 13:53:10,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:53:10,775 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:53:10,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10 WrapperNode [2022-12-13 13:53:10,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:53:10,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:53:10,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:53:10,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:53:10,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,812 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 229 [2022-12-13 13:53:10,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:53:10,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:53:10,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:53:10,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:53:10,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,834 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:53:10,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:53:10,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:53:10,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:53:10,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (1/1) ... [2022-12-13 13:53:10,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:53:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:53:10,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:53:10,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:53:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-12-13 13:53:10,894 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-12-13 13:53:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-12-13 13:53:10,894 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-12-13 13:53:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:53:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:53:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:53:10,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:53:10,895 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 13:53:10,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:53:10,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:53:10,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:53:10,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:53:10,897 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:53:11,018 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:53:11,020 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:53:11,330 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:53:11,339 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:53:11,339 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 13:53:11,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:53:11 BoogieIcfgContainer [2022-12-13 13:53:11,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:53:11,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:53:11,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:53:11,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:53:11,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:53:10" (1/3) ... [2022-12-13 13:53:11,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a05a3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:53:11, skipping insertion in model container [2022-12-13 13:53:11,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:10" (2/3) ... [2022-12-13 13:53:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a05a3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:53:11, skipping insertion in model container [2022-12-13 13:53:11,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:53:11" (3/3) ... [2022-12-13 13:53:11,348 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-12-13 13:53:11,354 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 13:53:11,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:53:11,362 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-12-13 13:53:11,363 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:53:11,434 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:53:11,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 281 transitions, 578 flow [2022-12-13 13:53:11,530 INFO L130 PetriNetUnfolder]: 17/279 cut-off events. [2022-12-13 13:53:11,531 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:53:11,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 279 events. 17/279 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 623 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 227. Up to 2 conditions per place. [2022-12-13 13:53:11,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 281 transitions, 578 flow [2022-12-13 13:53:11,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 268 transitions, 545 flow [2022-12-13 13:53:11,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:53:11,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 268 transitions, 545 flow [2022-12-13 13:53:11,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 268 transitions, 545 flow [2022-12-13 13:53:11,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 268 transitions, 545 flow [2022-12-13 13:53:11,589 INFO L130 PetriNetUnfolder]: 17/268 cut-off events. [2022-12-13 13:53:11,590 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:53:11,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 268 events. 17/268 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 584 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 227. Up to 2 conditions per place. [2022-12-13 13:53:11,605 INFO L119 LiptonReduction]: Number of co-enabled transitions 31780 [2022-12-13 13:53:16,870 INFO L134 LiptonReduction]: Checked pairs total: 53439 [2022-12-13 13:53:16,870 INFO L136 LiptonReduction]: Total number of compositions: 250 [2022-12-13 13:53:16,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:53:16,884 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1afcdf6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:53:16,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-12-13 13:53:16,887 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2022-12-13 13:53:16,887 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:53:16,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:16,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:53:16,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting writer_fnErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:53:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1680719563, now seen corresponding path program 1 times [2022-12-13 13:53:16,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:16,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523961266] [2022-12-13 13:53:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:17,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523961266] [2022-12-13 13:53:17,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523961266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:17,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:17,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:53:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603221745] [2022-12-13 13:53:17,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:17,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:53:17,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:53:17,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:53:17,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 531 [2022-12-13 13:53:17,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 167 flow. Second operand has 2 states, 2 states have (on average 270.0) internal successors, (540), 2 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:17,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:17,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 531 [2022-12-13 13:53:17,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:18,398 INFO L130 PetriNetUnfolder]: 11526/16937 cut-off events. [2022-12-13 13:53:18,398 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-12-13 13:53:18,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33391 conditions, 16937 events. 11526/16937 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 100514 event pairs, 9254 based on Foata normal form. 419/9120 useless extension candidates. Maximal degree in co-relation 33242. Up to 16396 conditions per place. [2022-12-13 13:53:18,470 INFO L137 encePairwiseOnDemand]: 524/531 looper letters, 60 selfloop transitions, 0 changer transitions 0/72 dead transitions. [2022-12-13 13:53:18,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 273 flow [2022-12-13 13:53:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:53:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:53:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 601 transitions. [2022-12-13 13:53:18,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5659133709981168 [2022-12-13 13:53:18,482 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 601 transitions. [2022-12-13 13:53:18,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 601 transitions. [2022-12-13 13:53:18,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:18,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 601 transitions. [2022-12-13 13:53:18,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 300.5) internal successors, (601), 2 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:18,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 531.0) internal successors, (1593), 3 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:18,496 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 531.0) internal successors, (1593), 3 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:18,498 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 167 flow. Second operand 2 states and 601 transitions. [2022-12-13 13:53:18,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 273 flow [2022-12-13 13:53:18,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:53:18,503 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 148 flow [2022-12-13 13:53:18,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2022-12-13 13:53:18,508 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, -6 predicate places. [2022-12-13 13:53:18,508 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 148 flow [2022-12-13 13:53:18,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 270.0) internal successors, (540), 2 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:18,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:18,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:53:18,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:53:18,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting writer_fnErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:53:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1680719562, now seen corresponding path program 1 times [2022-12-13 13:53:18,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:18,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753406678] [2022-12-13 13:53:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:18,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:18,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:18,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753406678] [2022-12-13 13:53:18,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753406678] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:18,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:18,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:53:18,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59239897] [2022-12-13 13:53:18,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:18,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:53:18,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:53:18,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:53:18,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 531 [2022-12-13 13:53:18,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:18,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:18,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 531 [2022-12-13 13:53:18,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:20,396 INFO L130 PetriNetUnfolder]: 19102/28549 cut-off events. [2022-12-13 13:53:20,396 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 13:53:20,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55974 conditions, 28549 events. 19102/28549 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 192608 event pairs, 9254 based on Foata normal form. 0/15364 useless extension candidates. Maximal degree in co-relation 55971. Up to 16396 conditions per place. [2022-12-13 13:53:20,494 INFO L137 encePairwiseOnDemand]: 525/531 looper letters, 109 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2022-12-13 13:53:20,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 123 transitions, 473 flow [2022-12-13 13:53:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:53:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:53:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2022-12-13 13:53:20,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5618330194601381 [2022-12-13 13:53:20,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2022-12-13 13:53:20,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2022-12-13 13:53:20,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:20,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2022-12-13 13:53:20,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,502 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 148 flow. Second operand 3 states and 895 transitions. [2022-12-13 13:53:20,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 123 transitions, 473 flow [2022-12-13 13:53:20,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:53:20,504 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 166 flow [2022-12-13 13:53:20,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2022-12-13 13:53:20,505 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-12-13 13:53:20,505 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 166 flow [2022-12-13 13:53:20,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:20,506 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:53:20,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:53:20,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:53:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1680721899, now seen corresponding path program 1 times [2022-12-13 13:53:20,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:20,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590432819] [2022-12-13 13:53:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:20,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590432819] [2022-12-13 13:53:20,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590432819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:20,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:20,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:53:20,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094542950] [2022-12-13 13:53:20,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:20,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:53:20,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:53:20,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:53:20,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 531 [2022-12-13 13:53:20,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:20,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 531 [2022-12-13 13:53:20,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:23,702 INFO L130 PetriNetUnfolder]: 32303/47331 cut-off events. [2022-12-13 13:53:23,702 INFO L131 PetriNetUnfolder]: For 3386/3386 co-relation queries the response was YES. [2022-12-13 13:53:23,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98172 conditions, 47331 events. 32303/47331 cut-off events. For 3386/3386 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 330494 event pairs, 15624 based on Foata normal form. 0/26536 useless extension candidates. Maximal degree in co-relation 98167. Up to 27384 conditions per place. [2022-12-13 13:53:23,871 INFO L137 encePairwiseOnDemand]: 525/531 looper letters, 109 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2022-12-13 13:53:23,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 123 transitions, 504 flow [2022-12-13 13:53:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:53:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:53:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2022-12-13 13:53:23,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5586942875078468 [2022-12-13 13:53:23,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2022-12-13 13:53:23,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2022-12-13 13:53:23,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:23,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2022-12-13 13:53:23,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:23,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:23,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:23,881 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 166 flow. Second operand 3 states and 890 transitions. [2022-12-13 13:53:23,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 123 transitions, 504 flow [2022-12-13 13:53:23,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 123 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:53:23,886 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 182 flow [2022-12-13 13:53:23,886 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2022-12-13 13:53:23,887 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, -1 predicate places. [2022-12-13 13:53:23,887 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 182 flow [2022-12-13 13:53:23,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:23,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:23,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:23,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:53:23,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:53:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash 562774242, now seen corresponding path program 1 times [2022-12-13 13:53:23,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:23,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902985879] [2022-12-13 13:53:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:23,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:24,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:24,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902985879] [2022-12-13 13:53:24,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902985879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:24,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:24,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:53:24,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686356852] [2022-12-13 13:53:24,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:53:24,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:24,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:53:24,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:53:24,522 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 531 [2022-12-13 13:53:24,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 251.16666666666666) internal successors, (1507), 6 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:24,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:24,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 531 [2022-12-13 13:53:24,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:28,079 INFO L130 PetriNetUnfolder]: 33111/48185 cut-off events. [2022-12-13 13:53:28,080 INFO L131 PetriNetUnfolder]: For 4688/4688 co-relation queries the response was YES. [2022-12-13 13:53:28,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103432 conditions, 48185 events. 33111/48185 cut-off events. For 4688/4688 co-relation queries the response was YES. Maximal size of possible extension queue 1273. Compared 330450 event pairs, 15482 based on Foata normal form. 60/27858 useless extension candidates. Maximal degree in co-relation 103426. Up to 45965 conditions per place. [2022-12-13 13:53:28,270 INFO L137 encePairwiseOnDemand]: 523/531 looper letters, 111 selfloop transitions, 10 changer transitions 0/133 dead transitions. [2022-12-13 13:53:28,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 133 transitions, 553 flow [2022-12-13 13:53:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:53:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:53:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1371 transitions. [2022-12-13 13:53:28,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5163841807909605 [2022-12-13 13:53:28,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1371 transitions. [2022-12-13 13:53:28,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1371 transitions. [2022-12-13 13:53:28,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:28,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1371 transitions. [2022-12-13 13:53:28,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:28,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 531.0) internal successors, (3186), 6 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:28,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 531.0) internal successors, (3186), 6 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:28,282 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 182 flow. Second operand 5 states and 1371 transitions. [2022-12-13 13:53:28,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 133 transitions, 553 flow [2022-12-13 13:53:28,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 550 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:53:28,287 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 246 flow [2022-12-13 13:53:28,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2022-12-13 13:53:28,288 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 5 predicate places. [2022-12-13 13:53:28,289 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 246 flow [2022-12-13 13:53:28,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 251.16666666666666) internal successors, (1507), 6 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:28,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:28,290 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:28,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:53:28,290 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:53:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash 562700155, now seen corresponding path program 1 times [2022-12-13 13:53:28,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:28,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798742604] [2022-12-13 13:53:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:28,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:28,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798742604] [2022-12-13 13:53:28,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798742604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:28,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:28,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:53:28,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125660205] [2022-12-13 13:53:28,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:53:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:53:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:53:28,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 531 [2022-12-13 13:53:28,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 252.0) internal successors, (1764), 7 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:28,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:28,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 531 [2022-12-13 13:53:28,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:32,185 INFO L130 PetriNetUnfolder]: 32871/47880 cut-off events. [2022-12-13 13:53:32,185 INFO L131 PetriNetUnfolder]: For 9260/9260 co-relation queries the response was YES. [2022-12-13 13:53:32,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109059 conditions, 47880 events. 32871/47880 cut-off events. For 9260/9260 co-relation queries the response was YES. Maximal size of possible extension queue 1273. Compared 329547 event pairs, 16499 based on Foata normal form. 50/27672 useless extension candidates. Maximal degree in co-relation 109050. Up to 45935 conditions per place. [2022-12-13 13:53:32,412 INFO L137 encePairwiseOnDemand]: 522/531 looper letters, 115 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2022-12-13 13:53:32,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 147 transitions, 695 flow [2022-12-13 13:53:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:53:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:53:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1633 transitions. [2022-12-13 13:53:32,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5125549278091651 [2022-12-13 13:53:32,419 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1633 transitions. [2022-12-13 13:53:32,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1633 transitions. [2022-12-13 13:53:32,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:32,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1633 transitions. [2022-12-13 13:53:32,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 272.1666666666667) internal successors, (1633), 6 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:32,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:32,436 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:32,436 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 246 flow. Second operand 6 states and 1633 transitions. [2022-12-13 13:53:32,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 147 transitions, 695 flow [2022-12-13 13:53:32,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 147 transitions, 695 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:53:32,445 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 374 flow [2022-12-13 13:53:32,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=374, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2022-12-13 13:53:32,445 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2022-12-13 13:53:32,445 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 374 flow [2022-12-13 13:53:32,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 252.0) internal successors, (1764), 7 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:32,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:32,446 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:32,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:53:32,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:53:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash -407596308, now seen corresponding path program 1 times [2022-12-13 13:53:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:32,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153961278] [2022-12-13 13:53:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:32,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:32,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:32,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153961278] [2022-12-13 13:53:32,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153961278] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:32,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:32,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:53:32,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346840944] [2022-12-13 13:53:32,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:32,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:53:32,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:32,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:53:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:53:32,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 531 [2022-12-13 13:53:32,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 374 flow. Second operand has 8 states, 8 states have (on average 239.375) internal successors, (1915), 8 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:32,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:32,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 531 [2022-12-13 13:53:32,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:40,573 INFO L130 PetriNetUnfolder]: 64775/95020 cut-off events. [2022-12-13 13:53:40,573 INFO L131 PetriNetUnfolder]: For 20831/20839 co-relation queries the response was YES. [2022-12-13 13:53:40,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225573 conditions, 95020 events. 64775/95020 cut-off events. For 20831/20839 co-relation queries the response was YES. Maximal size of possible extension queue 2411. Compared 717389 event pairs, 13436 based on Foata normal form. 8/55206 useless extension candidates. Maximal degree in co-relation 225559. Up to 28721 conditions per place. [2022-12-13 13:53:41,039 INFO L137 encePairwiseOnDemand]: 515/531 looper letters, 409 selfloop transitions, 46 changer transitions 0/466 dead transitions. [2022-12-13 13:53:41,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 466 transitions, 2397 flow [2022-12-13 13:53:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:53:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 13:53:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2785 transitions. [2022-12-13 13:53:41,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.524482109227872 [2022-12-13 13:53:41,044 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2785 transitions. [2022-12-13 13:53:41,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2785 transitions. [2022-12-13 13:53:41,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:41,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2785 transitions. [2022-12-13 13:53:41,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 278.5) internal successors, (2785), 10 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:41,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 531.0) internal successors, (5841), 11 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:41,056 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 531.0) internal successors, (5841), 11 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:41,056 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 374 flow. Second operand 10 states and 2785 transitions. [2022-12-13 13:53:41,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 466 transitions, 2397 flow [2022-12-13 13:53:41,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 466 transitions, 2368 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:53:41,077 INFO L231 Difference]: Finished difference. Result has 102 places, 142 transitions, 748 flow [2022-12-13 13:53:41,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=748, PETRI_PLACES=102, PETRI_TRANSITIONS=142} [2022-12-13 13:53:41,078 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 26 predicate places. [2022-12-13 13:53:41,078 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 142 transitions, 748 flow [2022-12-13 13:53:41,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 239.375) internal successors, (1915), 8 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:41,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:41,079 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:41,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:53:41,080 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:53:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash -407596427, now seen corresponding path program 1 times [2022-12-13 13:53:41,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:41,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770719293] [2022-12-13 13:53:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:41,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:41,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770719293] [2022-12-13 13:53:41,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770719293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:41,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:41,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:53:41,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863205452] [2022-12-13 13:53:41,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:41,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:53:41,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:53:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:53:41,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 531 [2022-12-13 13:53:41,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 142 transitions, 748 flow. Second operand has 8 states, 8 states have (on average 239.375) internal successors, (1915), 8 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:41,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:41,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 531 [2022-12-13 13:53:41,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:50,412 INFO L130 PetriNetUnfolder]: 68082/101328 cut-off events. [2022-12-13 13:53:50,413 INFO L131 PetriNetUnfolder]: For 69069/69109 co-relation queries the response was YES. [2022-12-13 13:53:50,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280340 conditions, 101328 events. 68082/101328 cut-off events. For 69069/69109 co-relation queries the response was YES. Maximal size of possible extension queue 2670. Compared 794372 event pairs, 13609 based on Foata normal form. 1078/65778 useless extension candidates. Maximal degree in co-relation 280322. Up to 30430 conditions per place. [2022-12-13 13:53:50,968 INFO L137 encePairwiseOnDemand]: 514/531 looper letters, 412 selfloop transitions, 59 changer transitions 0/482 dead transitions. [2022-12-13 13:53:50,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 482 transitions, 2794 flow [2022-12-13 13:53:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:53:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 13:53:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2784 transitions. [2022-12-13 13:53:50,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5242937853107345 [2022-12-13 13:53:50,974 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2784 transitions. [2022-12-13 13:53:50,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2784 transitions. [2022-12-13 13:53:50,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:50,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2784 transitions. [2022-12-13 13:53:50,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 278.4) internal successors, (2784), 10 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:50,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 531.0) internal successors, (5841), 11 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:50,986 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 531.0) internal successors, (5841), 11 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:50,986 INFO L175 Difference]: Start difference. First operand has 102 places, 142 transitions, 748 flow. Second operand 10 states and 2784 transitions. [2022-12-13 13:53:50,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 482 transitions, 2794 flow [2022-12-13 13:53:51,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 482 transitions, 2782 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 13:53:51,801 INFO L231 Difference]: Finished difference. Result has 114 places, 161 transitions, 1055 flow [2022-12-13 13:53:51,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1055, PETRI_PLACES=114, PETRI_TRANSITIONS=161} [2022-12-13 13:53:51,802 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 38 predicate places. [2022-12-13 13:53:51,802 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 161 transitions, 1055 flow [2022-12-13 13:53:51,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 239.375) internal successors, (1915), 8 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:51,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:51,803 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:51,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:53:51,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting writer_fnErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:53:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1603104, now seen corresponding path program 1 times [2022-12-13 13:53:51,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:51,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869532574] [2022-12-13 13:53:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:51,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:51,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:51,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869532574] [2022-12-13 13:53:51,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869532574] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:51,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:51,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:53:51,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447765703] [2022-12-13 13:53:51,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:51,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:53:51,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:51,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:53:51,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:53:52,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 531 [2022-12-13 13:53:52,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 161 transitions, 1055 flow. Second operand has 8 states, 8 states have (on average 241.375) internal successors, (1931), 8 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:52,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:52,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 531 [2022-12-13 13:53:52,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:54:10,232 INFO L130 PetriNetUnfolder]: 137756/206267 cut-off events. [2022-12-13 13:54:10,232 INFO L131 PetriNetUnfolder]: For 274403/278002 co-relation queries the response was YES. [2022-12-13 13:54:10,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611406 conditions, 206267 events. 137756/206267 cut-off events. For 274403/278002 co-relation queries the response was YES. Maximal size of possible extension queue 4912. Compared 1730826 event pairs, 27887 based on Foata normal form. 3155/138175 useless extension candidates. Maximal degree in co-relation 611384. Up to 61124 conditions per place. [2022-12-13 13:54:11,495 INFO L137 encePairwiseOnDemand]: 515/531 looper letters, 734 selfloop transitions, 146 changer transitions 0/892 dead transitions. [2022-12-13 13:54:11,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 892 transitions, 7303 flow [2022-12-13 13:54:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:54:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 13:54:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2824 transitions. [2022-12-13 13:54:11,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5318267419962335 [2022-12-13 13:54:11,500 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2824 transitions. [2022-12-13 13:54:11,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2824 transitions. [2022-12-13 13:54:11,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:54:11,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2824 transitions. [2022-12-13 13:54:11,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.4) internal successors, (2824), 10 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:11,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 531.0) internal successors, (5841), 11 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:11,516 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 531.0) internal successors, (5841), 11 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:11,516 INFO L175 Difference]: Start difference. First operand has 114 places, 161 transitions, 1055 flow. Second operand 10 states and 2824 transitions. [2022-12-13 13:54:11,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 892 transitions, 7303 flow [2022-12-13 13:54:12,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 892 transitions, 6982 flow, removed 27 selfloop flow, removed 4 redundant places. [2022-12-13 13:54:12,468 INFO L231 Difference]: Finished difference. Result has 124 places, 350 transitions, 3030 flow [2022-12-13 13:54:12,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3030, PETRI_PLACES=124, PETRI_TRANSITIONS=350} [2022-12-13 13:54:12,469 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 48 predicate places. [2022-12-13 13:54:12,469 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 350 transitions, 3030 flow [2022-12-13 13:54:12,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 241.375) internal successors, (1931), 8 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:12,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:54:12,470 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:12,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:54:12,470 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting writer_fnErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:54:12,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1603156, now seen corresponding path program 1 times [2022-12-13 13:54:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:12,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138601157] [2022-12-13 13:54:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:12,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138601157] [2022-12-13 13:54:12,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138601157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:12,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:12,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:54:12,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20475501] [2022-12-13 13:54:12,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:12,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:54:12,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:12,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:54:12,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:54:12,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 531 [2022-12-13 13:54:12,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 350 transitions, 3030 flow. Second operand has 8 states, 8 states have (on average 241.375) internal successors, (1931), 8 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:12,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:54:12,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 531 [2022-12-13 13:54:12,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:54:35,660 INFO L130 PetriNetUnfolder]: 139281/211618 cut-off events. [2022-12-13 13:54:35,661 INFO L131 PetriNetUnfolder]: For 419170/423236 co-relation queries the response was YES. [2022-12-13 13:54:36,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714407 conditions, 211618 events. 139281/211618 cut-off events. For 419170/423236 co-relation queries the response was YES. Maximal size of possible extension queue 5226. Compared 1833092 event pairs, 29245 based on Foata normal form. 4431/146907 useless extension candidates. Maximal degree in co-relation 714381. Up to 65560 conditions per place. [2022-12-13 13:54:37,070 INFO L137 encePairwiseOnDemand]: 515/531 looper letters, 765 selfloop transitions, 229 changer transitions 0/1006 dead transitions. [2022-12-13 13:54:37,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 1006 transitions, 9435 flow [2022-12-13 13:54:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:54:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 13:54:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2822 transitions. [2022-12-13 13:54:37,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5314500941619585 [2022-12-13 13:54:37,075 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2822 transitions. [2022-12-13 13:54:37,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2822 transitions. [2022-12-13 13:54:37,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:54:37,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2822 transitions. [2022-12-13 13:54:37,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.2) internal successors, (2822), 10 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:37,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 531.0) internal successors, (5841), 11 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:37,083 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 531.0) internal successors, (5841), 11 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:37,083 INFO L175 Difference]: Start difference. First operand has 124 places, 350 transitions, 3030 flow. Second operand 10 states and 2822 transitions. [2022-12-13 13:54:37,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 1006 transitions, 9435 flow [2022-12-13 13:54:41,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 1006 transitions, 9423 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 13:54:41,027 INFO L231 Difference]: Finished difference. Result has 134 places, 465 transitions, 4896 flow [2022-12-13 13:54:41,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4896, PETRI_PLACES=134, PETRI_TRANSITIONS=465} [2022-12-13 13:54:41,028 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 58 predicate places. [2022-12-13 13:54:41,028 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 465 transitions, 4896 flow [2022-12-13 13:54:41,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 241.375) internal successors, (1931), 8 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:41,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:54:41,028 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:41,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:54:41,028 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:54:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:41,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2003361613, now seen corresponding path program 1 times [2022-12-13 13:54:41,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:41,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035932456] [2022-12-13 13:54:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:41,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:41,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:41,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035932456] [2022-12-13 13:54:41,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035932456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:41,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:41,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:54:41,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289704838] [2022-12-13 13:54:41,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:41,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:54:41,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:54:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:41,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 531 [2022-12-13 13:54:41,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 465 transitions, 4896 flow. Second operand has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:41,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:54:41,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 531 [2022-12-13 13:54:41,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:54:47,587 INFO L130 PetriNetUnfolder]: 30412/52823 cut-off events. [2022-12-13 13:54:47,587 INFO L131 PetriNetUnfolder]: For 127583/127805 co-relation queries the response was YES. [2022-12-13 13:54:47,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177335 conditions, 52823 events. 30412/52823 cut-off events. For 127583/127805 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 460012 event pairs, 4747 based on Foata normal form. 6105/43036 useless extension candidates. Maximal degree in co-relation 177306. Up to 41219 conditions per place. [2022-12-13 13:54:47,921 INFO L137 encePairwiseOnDemand]: 521/531 looper letters, 284 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2022-12-13 13:54:47,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 324 transitions, 3260 flow [2022-12-13 13:54:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:54:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:54:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2022-12-13 13:54:47,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5505335844318895 [2022-12-13 13:54:47,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2022-12-13 13:54:47,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2022-12-13 13:54:47,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:54:47,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2022-12-13 13:54:47,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:47,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:47,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:47,927 INFO L175 Difference]: Start difference. First operand has 134 places, 465 transitions, 4896 flow. Second operand 3 states and 877 transitions. [2022-12-13 13:54:47,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 324 transitions, 3260 flow [2022-12-13 13:54:48,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 324 transitions, 3178 flow, removed 19 selfloop flow, removed 3 redundant places. [2022-12-13 13:54:48,748 INFO L231 Difference]: Finished difference. Result has 133 places, 276 transitions, 2343 flow [2022-12-13 13:54:48,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2343, PETRI_PLACES=133, PETRI_TRANSITIONS=276} [2022-12-13 13:54:48,748 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 57 predicate places. [2022-12-13 13:54:48,748 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 276 transitions, 2343 flow [2022-12-13 13:54:48,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:48,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:54:48,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:48,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:54:48,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:54:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash -831691060, now seen corresponding path program 1 times [2022-12-13 13:54:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:48,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821108020] [2022-12-13 13:54:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:48,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:48,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821108020] [2022-12-13 13:54:48,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821108020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:54:48,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601027695] [2022-12-13 13:54:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:48,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:54:48,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:54:48,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:54:48,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:54:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:48,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:54:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:54:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:48,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:54:48,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601027695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:48,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:54:48,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 13:54:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042727872] [2022-12-13 13:54:48,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:54:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:54:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:54:48,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 531 [2022-12-13 13:54:48,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 276 transitions, 2343 flow. Second operand has 4 states, 4 states have (on average 262.25) internal successors, (1049), 4 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:48,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:54:48,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 531 [2022-12-13 13:54:48,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:54:54,122 INFO L130 PetriNetUnfolder]: 27172/46296 cut-off events. [2022-12-13 13:54:54,122 INFO L131 PetriNetUnfolder]: For 109553/110565 co-relation queries the response was YES. [2022-12-13 13:54:54,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158832 conditions, 46296 events. 27172/46296 cut-off events. For 109553/110565 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 381500 event pairs, 10413 based on Foata normal form. 1743/35946 useless extension candidates. Maximal degree in co-relation 158802. Up to 27430 conditions per place. [2022-12-13 13:54:54,409 INFO L137 encePairwiseOnDemand]: 527/531 looper letters, 394 selfloop transitions, 4 changer transitions 0/414 dead transitions. [2022-12-13 13:54:54,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 414 transitions, 4072 flow [2022-12-13 13:54:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:54:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:54:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1182 transitions. [2022-12-13 13:54:54,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.556497175141243 [2022-12-13 13:54:54,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1182 transitions. [2022-12-13 13:54:54,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1182 transitions. [2022-12-13 13:54:54,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:54:54,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1182 transitions. [2022-12-13 13:54:54,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.5) internal successors, (1182), 4 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:54,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 531.0) internal successors, (2655), 5 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:54,420 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 531.0) internal successors, (2655), 5 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:54,420 INFO L175 Difference]: Start difference. First operand has 133 places, 276 transitions, 2343 flow. Second operand 4 states and 1182 transitions. [2022-12-13 13:54:54,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 414 transitions, 4072 flow [2022-12-13 13:54:54,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 414 transitions, 4027 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:54:54,874 INFO L231 Difference]: Finished difference. Result has 133 places, 274 transitions, 2317 flow [2022-12-13 13:54:54,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2317, PETRI_PLACES=133, PETRI_TRANSITIONS=274} [2022-12-13 13:54:54,875 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 57 predicate places. [2022-12-13 13:54:54,875 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 274 transitions, 2317 flow [2022-12-13 13:54:54,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 262.25) internal successors, (1049), 4 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:54,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:54:54,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:54,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:54:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:54:55,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting writer_fnErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:54:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash 515867669, now seen corresponding path program 1 times [2022-12-13 13:54:55,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:55,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524637169] [2022-12-13 13:54:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:55,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:55,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524637169] [2022-12-13 13:54:55,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524637169] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:54:55,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849583728] [2022-12-13 13:54:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:55,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:54:55,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:54:55,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:54:55,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:54:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:54:55,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:54:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:55,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:54:55,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849583728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:55,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:54:55,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 13:54:55,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258467927] [2022-12-13 13:54:55,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:55,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:54:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:54:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:54:55,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 531 [2022-12-13 13:54:55,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 274 transitions, 2317 flow. Second operand has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:55,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:54:55,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 531 [2022-12-13 13:54:55,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:54:59,724 INFO L130 PetriNetUnfolder]: 24105/40954 cut-off events. [2022-12-13 13:54:59,724 INFO L131 PetriNetUnfolder]: For 100681/101489 co-relation queries the response was YES. [2022-12-13 13:54:59,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140343 conditions, 40954 events. 24105/40954 cut-off events. For 100681/101489 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 329587 event pairs, 7958 based on Foata normal form. 1525/32004 useless extension candidates. Maximal degree in co-relation 140312. Up to 24916 conditions per place. [2022-12-13 13:54:59,992 INFO L137 encePairwiseOnDemand]: 527/531 looper letters, 398 selfloop transitions, 4 changer transitions 0/418 dead transitions. [2022-12-13 13:54:59,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 418 transitions, 4075 flow [2022-12-13 13:54:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:54:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:54:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1185 transitions. [2022-12-13 13:54:59,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.557909604519774 [2022-12-13 13:54:59,995 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1185 transitions. [2022-12-13 13:54:59,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1185 transitions. [2022-12-13 13:54:59,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:54:59,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1185 transitions. [2022-12-13 13:54:59,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:59,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 531.0) internal successors, (2655), 5 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:59,999 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 531.0) internal successors, (2655), 5 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:59,999 INFO L175 Difference]: Start difference. First operand has 133 places, 274 transitions, 2317 flow. Second operand 4 states and 1185 transitions. [2022-12-13 13:54:59,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 418 transitions, 4075 flow [2022-12-13 13:55:00,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 418 transitions, 4059 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:55:00,478 INFO L231 Difference]: Finished difference. Result has 132 places, 272 transitions, 2309 flow [2022-12-13 13:55:00,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2309, PETRI_PLACES=132, PETRI_TRANSITIONS=272} [2022-12-13 13:55:00,479 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 56 predicate places. [2022-12-13 13:55:00,479 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 272 transitions, 2309 flow [2022-12-13 13:55:00,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:00,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:00,479 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:00,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:55:00,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:55:00,681 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:55:00,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash -12616124, now seen corresponding path program 1 times [2022-12-13 13:55:00,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:00,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977916780] [2022-12-13 13:55:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:00,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:00,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:00,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977916780] [2022-12-13 13:55:00,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977916780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:55:00,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318994692] [2022-12-13 13:55:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:00,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:55:00,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:55:00,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:55:00,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:55:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:01,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:55:01,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:55:01,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 13:55:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:01,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:55:01,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-12-13 13:55:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:01,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318994692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:55:01,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:55:01,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-12-13 13:55:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117892231] [2022-12-13 13:55:01,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:55:01,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:55:01,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:55:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:55:01,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 531 [2022-12-13 13:55:01,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 272 transitions, 2309 flow. Second operand has 12 states, 12 states have (on average 256.6666666666667) internal successors, (3080), 12 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:01,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:01,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 531 [2022-12-13 13:55:01,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:06,857 INFO L130 PetriNetUnfolder]: 25104/42713 cut-off events. [2022-12-13 13:55:06,857 INFO L131 PetriNetUnfolder]: For 95825/96355 co-relation queries the response was YES. [2022-12-13 13:55:07,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146846 conditions, 42713 events. 25104/42713 cut-off events. For 95825/96355 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 348211 event pairs, 5148 based on Foata normal form. 525/32351 useless extension candidates. Maximal degree in co-relation 146815. Up to 25887 conditions per place. [2022-12-13 13:55:07,165 INFO L137 encePairwiseOnDemand]: 521/531 looper letters, 376 selfloop transitions, 66 changer transitions 0/458 dead transitions. [2022-12-13 13:55:07,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 458 transitions, 4402 flow [2022-12-13 13:55:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:55:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:55:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1692 transitions. [2022-12-13 13:55:07,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5310734463276836 [2022-12-13 13:55:07,168 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1692 transitions. [2022-12-13 13:55:07,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1692 transitions. [2022-12-13 13:55:07,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:07,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1692 transitions. [2022-12-13 13:55:07,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:07,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:07,174 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:07,174 INFO L175 Difference]: Start difference. First operand has 132 places, 272 transitions, 2309 flow. Second operand 6 states and 1692 transitions. [2022-12-13 13:55:07,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 458 transitions, 4402 flow [2022-12-13 13:55:07,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 458 transitions, 4382 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:55:07,834 INFO L231 Difference]: Finished difference. Result has 137 places, 282 transitions, 2668 flow [2022-12-13 13:55:07,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2668, PETRI_PLACES=137, PETRI_TRANSITIONS=282} [2022-12-13 13:55:07,834 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 61 predicate places. [2022-12-13 13:55:07,834 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 282 transitions, 2668 flow [2022-12-13 13:55:07,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 256.6666666666667) internal successors, (3080), 12 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:07,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:07,835 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:07,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:55:08,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 13:55:08,036 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:55:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash -12616159, now seen corresponding path program 1 times [2022-12-13 13:55:08,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:08,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186009473] [2022-12-13 13:55:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:08,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:08,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186009473] [2022-12-13 13:55:08,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186009473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:55:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593756094] [2022-12-13 13:55:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:08,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:55:08,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:55:08,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:55:08,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:55:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:55:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:55:08,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 13:55:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:08,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:55:08,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-12-13 13:55:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:08,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593756094] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:55:08,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:55:08,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 13:55:08,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97066148] [2022-12-13 13:55:08,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:55:08,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:55:08,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:55:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:55:08,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 531 [2022-12-13 13:55:08,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 282 transitions, 2668 flow. Second operand has 9 states, 9 states have (on average 259.44444444444446) internal successors, (2335), 9 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:08,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:08,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 531 [2022-12-13 13:55:08,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:13,841 INFO L130 PetriNetUnfolder]: 24941/42528 cut-off events. [2022-12-13 13:55:13,841 INFO L131 PetriNetUnfolder]: For 114364/114901 co-relation queries the response was YES. [2022-12-13 13:55:14,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151100 conditions, 42528 events. 24941/42528 cut-off events. For 114364/114901 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 347277 event pairs, 5134 based on Foata normal form. 529/32173 useless extension candidates. Maximal degree in co-relation 151067. Up to 24808 conditions per place. [2022-12-13 13:55:14,182 INFO L137 encePairwiseOnDemand]: 522/531 looper letters, 340 selfloop transitions, 75 changer transitions 0/431 dead transitions. [2022-12-13 13:55:14,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 431 transitions, 4418 flow [2022-12-13 13:55:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:55:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:55:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1441 transitions. [2022-12-13 13:55:14,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5427495291902071 [2022-12-13 13:55:14,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1441 transitions. [2022-12-13 13:55:14,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1441 transitions. [2022-12-13 13:55:14,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:14,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1441 transitions. [2022-12-13 13:55:14,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.2) internal successors, (1441), 5 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 531.0) internal successors, (3186), 6 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,190 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 531.0) internal successors, (3186), 6 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,190 INFO L175 Difference]: Start difference. First operand has 137 places, 282 transitions, 2668 flow. Second operand 5 states and 1441 transitions. [2022-12-13 13:55:14,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 431 transitions, 4418 flow [2022-12-13 13:55:14,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 431 transitions, 4341 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-12-13 13:55:14,899 INFO L231 Difference]: Finished difference. Result has 138 places, 290 transitions, 2859 flow [2022-12-13 13:55:14,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2859, PETRI_PLACES=138, PETRI_TRANSITIONS=290} [2022-12-13 13:55:14,899 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 62 predicate places. [2022-12-13 13:55:14,899 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 290 transitions, 2859 flow [2022-12-13 13:55:14,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 259.44444444444446) internal successors, (2335), 9 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:14,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:14,900 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:14,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:55:15,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:55:15,101 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:55:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1187970160, now seen corresponding path program 1 times [2022-12-13 13:55:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:15,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500608351] [2022-12-13 13:55:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:15,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:15,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500608351] [2022-12-13 13:55:15,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500608351] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:55:15,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719122140] [2022-12-13 13:55:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:15,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:55:15,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:55:15,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:55:15,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:55:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:15,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:55:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:55:15,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 13:55:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:15,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:55:15,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-12-13 13:55:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:15,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719122140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:55:15,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:55:15,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-12-13 13:55:15,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442541935] [2022-12-13 13:55:15,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:55:15,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:55:15,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:55:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:55:15,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 531 [2022-12-13 13:55:15,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 290 transitions, 2859 flow. Second operand has 7 states, 7 states have (on average 260.42857142857144) internal successors, (1823), 7 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:15,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:15,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 531 [2022-12-13 13:55:15,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:21,756 INFO L130 PetriNetUnfolder]: 25493/43747 cut-off events. [2022-12-13 13:55:21,756 INFO L131 PetriNetUnfolder]: For 119407/119901 co-relation queries the response was YES. [2022-12-13 13:55:21,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155495 conditions, 43747 events. 25493/43747 cut-off events. For 119407/119901 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 359964 event pairs, 4102 based on Foata normal form. 599/33303 useless extension candidates. Maximal degree in co-relation 155462. Up to 24948 conditions per place. [2022-12-13 13:55:22,016 INFO L137 encePairwiseOnDemand]: 522/531 looper letters, 374 selfloop transitions, 70 changer transitions 0/460 dead transitions. [2022-12-13 13:55:22,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 460 transitions, 4947 flow [2022-12-13 13:55:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:55:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:55:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1452 transitions. [2022-12-13 13:55:22,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5468926553672316 [2022-12-13 13:55:22,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1452 transitions. [2022-12-13 13:55:22,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1452 transitions. [2022-12-13 13:55:22,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:22,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1452 transitions. [2022-12-13 13:55:22,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.4) internal successors, (1452), 5 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:22,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 531.0) internal successors, (3186), 6 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:22,024 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 531.0) internal successors, (3186), 6 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:22,024 INFO L175 Difference]: Start difference. First operand has 138 places, 290 transitions, 2859 flow. Second operand 5 states and 1452 transitions. [2022-12-13 13:55:22,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 460 transitions, 4947 flow [2022-12-13 13:55:22,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 460 transitions, 4915 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-12-13 13:55:22,657 INFO L231 Difference]: Finished difference. Result has 143 places, 306 transitions, 3288 flow [2022-12-13 13:55:22,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3288, PETRI_PLACES=143, PETRI_TRANSITIONS=306} [2022-12-13 13:55:22,658 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 67 predicate places. [2022-12-13 13:55:22,658 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 306 transitions, 3288 flow [2022-12-13 13:55:22,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 260.42857142857144) internal successors, (1823), 7 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:22,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:22,658 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:22,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:55:22,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 13:55:22,860 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:55:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1187970195, now seen corresponding path program 1 times [2022-12-13 13:55:22,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:22,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418125436] [2022-12-13 13:55:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:22,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:23,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:23,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418125436] [2022-12-13 13:55:23,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418125436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:55:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333886613] [2022-12-13 13:55:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:23,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:55:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:55:23,377 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:55:23,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:55:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:55:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:55:23,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 13:55:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:23,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:55:23,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-12-13 13:55:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:23,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333886613] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:55:23,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:55:23,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 16 [2022-12-13 13:55:23,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389161566] [2022-12-13 13:55:23,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:55:23,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:55:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:55:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:55:24,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 531 [2022-12-13 13:55:24,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 306 transitions, 3288 flow. Second operand has 17 states, 17 states have (on average 242.0) internal successors, (4114), 17 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:24,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:24,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 531 [2022-12-13 13:55:24,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:30,869 INFO L130 PetriNetUnfolder]: 29429/48928 cut-off events. [2022-12-13 13:55:30,869 INFO L131 PetriNetUnfolder]: For 144840/145256 co-relation queries the response was YES. [2022-12-13 13:55:31,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178401 conditions, 48928 events. 29429/48928 cut-off events. For 144840/145256 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 390040 event pairs, 5683 based on Foata normal form. 583/36937 useless extension candidates. Maximal degree in co-relation 178366. Up to 28177 conditions per place. [2022-12-13 13:55:31,278 INFO L137 encePairwiseOnDemand]: 514/531 looper letters, 519 selfloop transitions, 153 changer transitions 0/684 dead transitions. [2022-12-13 13:55:31,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 684 transitions, 7047 flow [2022-12-13 13:55:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:55:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 13:55:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4184 transitions. [2022-12-13 13:55:31,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4924670433145009 [2022-12-13 13:55:31,286 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4184 transitions. [2022-12-13 13:55:31,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4184 transitions. [2022-12-13 13:55:31,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:31,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4184 transitions. [2022-12-13 13:55:31,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 261.5) internal successors, (4184), 16 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:31,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 531.0) internal successors, (9027), 17 states have internal predecessors, (9027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:31,304 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 531.0) internal successors, (9027), 17 states have internal predecessors, (9027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:31,304 INFO L175 Difference]: Start difference. First operand has 143 places, 306 transitions, 3288 flow. Second operand 16 states and 4184 transitions. [2022-12-13 13:55:31,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 684 transitions, 7047 flow [2022-12-13 13:55:32,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 684 transitions, 6778 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-12-13 13:55:32,283 INFO L231 Difference]: Finished difference. Result has 161 places, 367 transitions, 4400 flow [2022-12-13 13:55:32,283 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4400, PETRI_PLACES=161, PETRI_TRANSITIONS=367} [2022-12-13 13:55:32,283 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 85 predicate places. [2022-12-13 13:55:32,284 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 367 transitions, 4400 flow [2022-12-13 13:55:32,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 242.0) internal successors, (4114), 17 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:32,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:32,284 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:32,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:55:32,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76e6886-8034-4044-849e-530b53c4bacb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 13:55:32,486 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:55:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:32,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1886994601, now seen corresponding path program 1 times [2022-12-13 13:55:32,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:32,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140935409] [2022-12-13 13:55:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:32,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:32,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140935409] [2022-12-13 13:55:32,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140935409] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:32,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:32,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 13:55:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62110750] [2022-12-13 13:55:32,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:32,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:55:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:55:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:55:33,874 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 531 [2022-12-13 13:55:33,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 367 transitions, 4400 flow. Second operand has 13 states, 13 states have (on average 237.23076923076923) internal successors, (3084), 13 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:33,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:33,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 531 [2022-12-13 13:55:33,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:41,129 INFO L130 PetriNetUnfolder]: 28862/48641 cut-off events. [2022-12-13 13:55:41,129 INFO L131 PetriNetUnfolder]: For 191570/191918 co-relation queries the response was YES. [2022-12-13 13:55:41,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184638 conditions, 48641 events. 28862/48641 cut-off events. For 191570/191918 co-relation queries the response was YES. Maximal size of possible extension queue 1106. Compared 394544 event pairs, 12725 based on Foata normal form. 340/36598 useless extension candidates. Maximal degree in co-relation 184598. Up to 44752 conditions per place. [2022-12-13 13:55:41,511 INFO L137 encePairwiseOnDemand]: 514/531 looper letters, 559 selfloop transitions, 75 changer transitions 0/650 dead transitions. [2022-12-13 13:55:41,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 650 transitions, 7000 flow [2022-12-13 13:55:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:55:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 13:55:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4814 transitions. [2022-12-13 13:55:41,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4771533353156904 [2022-12-13 13:55:41,517 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4814 transitions. [2022-12-13 13:55:41,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4814 transitions. [2022-12-13 13:55:41,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:41,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4814 transitions. [2022-12-13 13:55:41,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 253.3684210526316) internal successors, (4814), 19 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:41,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 531.0) internal successors, (10620), 20 states have internal predecessors, (10620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:41,530 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 531.0) internal successors, (10620), 20 states have internal predecessors, (10620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:41,530 INFO L175 Difference]: Start difference. First operand has 161 places, 367 transitions, 4400 flow. Second operand 19 states and 4814 transitions. [2022-12-13 13:55:41,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 650 transitions, 7000 flow [2022-12-13 13:55:42,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 650 transitions, 6747 flow, removed 48 selfloop flow, removed 6 redundant places. [2022-12-13 13:55:42,608 INFO L231 Difference]: Finished difference. Result has 179 places, 414 transitions, 5008 flow [2022-12-13 13:55:42,608 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=4183, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5008, PETRI_PLACES=179, PETRI_TRANSITIONS=414} [2022-12-13 13:55:42,608 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 103 predicate places. [2022-12-13 13:55:42,608 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 414 transitions, 5008 flow [2022-12-13 13:55:42,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 237.23076923076923) internal successors, (3084), 13 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:42,609 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:42,609 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:42,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 13:55:42,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:55:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:42,609 INFO L85 PathProgramCache]: Analyzing trace with hash -426273731, now seen corresponding path program 1 times [2022-12-13 13:55:42,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:42,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044390171] [2022-12-13 13:55:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:42,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:42,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044390171] [2022-12-13 13:55:42,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044390171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:42,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:42,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:55:42,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933520611] [2022-12-13 13:55:42,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:42,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:55:42,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:42,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:55:42,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:55:43,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 531 [2022-12-13 13:55:43,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 414 transitions, 5008 flow. Second operand has 8 states, 8 states have (on average 251.75) internal successors, (2014), 8 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:43,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:55:43,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 531 [2022-12-13 13:55:43,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:55,255 INFO L130 PetriNetUnfolder]: 48893/84170 cut-off events. [2022-12-13 13:55:55,255 INFO L131 PetriNetUnfolder]: For 342794/344380 co-relation queries the response was YES. [2022-12-13 13:55:55,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321564 conditions, 84170 events. 48893/84170 cut-off events. For 342794/344380 co-relation queries the response was YES. Maximal size of possible extension queue 2164. Compared 764130 event pairs, 9912 based on Foata normal form. 1483/64146 useless extension candidates. Maximal degree in co-relation 321519. Up to 31424 conditions per place. [2022-12-13 13:55:55,984 INFO L137 encePairwiseOnDemand]: 516/531 looper letters, 837 selfloop transitions, 216 changer transitions 0/1074 dead transitions. [2022-12-13 13:55:55,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1074 transitions, 13081 flow [2022-12-13 13:55:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:55:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 13:55:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3110 transitions. [2022-12-13 13:55:55,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5324430748159562 [2022-12-13 13:55:55,988 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3110 transitions. [2022-12-13 13:55:55,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3110 transitions. [2022-12-13 13:55:55,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:55:55,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3110 transitions. [2022-12-13 13:55:55,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 282.72727272727275) internal successors, (3110), 11 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:55,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 531.0) internal successors, (6372), 12 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:55,996 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 531.0) internal successors, (6372), 12 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:55,996 INFO L175 Difference]: Start difference. First operand has 179 places, 414 transitions, 5008 flow. Second operand 11 states and 3110 transitions. [2022-12-13 13:55:55,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 1074 transitions, 13081 flow [2022-12-13 13:55:59,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1074 transitions, 12891 flow, removed 64 selfloop flow, removed 5 redundant places. [2022-12-13 13:55:59,439 INFO L231 Difference]: Finished difference. Result has 190 places, 553 transitions, 7708 flow [2022-12-13 13:55:59,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=4843, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7708, PETRI_PLACES=190, PETRI_TRANSITIONS=553} [2022-12-13 13:55:59,439 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 114 predicate places. [2022-12-13 13:55:59,439 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 553 transitions, 7708 flow [2022-12-13 13:55:59,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 251.75) internal successors, (2014), 8 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:59,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:55:59,439 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:59,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 13:55:59,440 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:55:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash -600354716, now seen corresponding path program 1 times [2022-12-13 13:55:59,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:59,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049072458] [2022-12-13 13:55:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:59,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:59,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049072458] [2022-12-13 13:55:59,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049072458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:59,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:59,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:55:59,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820000544] [2022-12-13 13:55:59,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:59,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:55:59,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:59,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:55:59,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:56:00,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 531 [2022-12-13 13:56:00,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 553 transitions, 7708 flow. Second operand has 9 states, 9 states have (on average 251.66666666666666) internal successors, (2265), 9 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:00,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:56:00,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 531 [2022-12-13 13:56:00,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:56:14,175 INFO L130 PetriNetUnfolder]: 49006/84083 cut-off events. [2022-12-13 13:56:14,175 INFO L131 PetriNetUnfolder]: For 436977/438371 co-relation queries the response was YES. [2022-12-13 13:56:14,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337514 conditions, 84083 events. 49006/84083 cut-off events. For 436977/438371 co-relation queries the response was YES. Maximal size of possible extension queue 2115. Compared 757858 event pairs, 9919 based on Foata normal form. 1400/63677 useless extension candidates. Maximal degree in co-relation 337462. Up to 31785 conditions per place. [2022-12-13 13:56:14,920 INFO L137 encePairwiseOnDemand]: 515/531 looper letters, 842 selfloop transitions, 228 changer transitions 0/1091 dead transitions. [2022-12-13 13:56:14,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1091 transitions, 14116 flow [2022-12-13 13:56:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:56:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:56:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3359 transitions. [2022-12-13 13:56:14,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5271500313873195 [2022-12-13 13:56:14,925 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3359 transitions. [2022-12-13 13:56:14,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3359 transitions. [2022-12-13 13:56:14,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:56:14,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3359 transitions. [2022-12-13 13:56:14,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 279.9166666666667) internal successors, (3359), 12 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:14,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 531.0) internal successors, (6903), 13 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:14,932 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 531.0) internal successors, (6903), 13 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:14,932 INFO L175 Difference]: Start difference. First operand has 190 places, 553 transitions, 7708 flow. Second operand 12 states and 3359 transitions. [2022-12-13 13:56:14,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1091 transitions, 14116 flow [2022-12-13 13:56:20,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1091 transitions, 14044 flow, removed 31 selfloop flow, removed 2 redundant places. [2022-12-13 13:56:20,114 INFO L231 Difference]: Finished difference. Result has 204 places, 610 transitions, 9144 flow [2022-12-13 13:56:20,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9144, PETRI_PLACES=204, PETRI_TRANSITIONS=610} [2022-12-13 13:56:20,114 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 128 predicate places. [2022-12-13 13:56:20,115 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 610 transitions, 9144 flow [2022-12-13 13:56:20,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 251.66666666666666) internal successors, (2265), 9 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:20,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:56:20,115 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:56:20,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:56:20,115 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:56:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:56:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1153440846, now seen corresponding path program 2 times [2022-12-13 13:56:20,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:56:20,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040654391] [2022-12-13 13:56:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:56:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:56:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:56:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:56:20,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:56:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040654391] [2022-12-13 13:56:20,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040654391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:56:20,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:56:20,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:56:20,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023754064] [2022-12-13 13:56:20,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:56:20,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:56:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:56:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:56:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:56:20,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 531 [2022-12-13 13:56:20,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 610 transitions, 9144 flow. Second operand has 9 states, 9 states have (on average 251.66666666666666) internal successors, (2265), 9 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:20,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:56:20,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 531 [2022-12-13 13:56:20,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:56:41,301 INFO L130 PetriNetUnfolder]: 64496/111479 cut-off events. [2022-12-13 13:56:41,301 INFO L131 PetriNetUnfolder]: For 652134/653649 co-relation queries the response was YES. [2022-12-13 13:56:41,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462740 conditions, 111479 events. 64496/111479 cut-off events. For 652134/653649 co-relation queries the response was YES. Maximal size of possible extension queue 2812. Compared 1050410 event pairs, 13431 based on Foata normal form. 1369/83681 useless extension candidates. Maximal degree in co-relation 462683. Up to 53236 conditions per place. [2022-12-13 13:56:42,362 INFO L137 encePairwiseOnDemand]: 515/531 looper letters, 871 selfloop transitions, 288 changer transitions 0/1180 dead transitions. [2022-12-13 13:56:42,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1180 transitions, 16648 flow [2022-12-13 13:56:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:56:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 13:56:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3632 transitions. [2022-12-13 13:56:42,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5261480515717804 [2022-12-13 13:56:42,366 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3632 transitions. [2022-12-13 13:56:42,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3632 transitions. [2022-12-13 13:56:42,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:56:42,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3632 transitions. [2022-12-13 13:56:42,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 279.38461538461536) internal successors, (3632), 13 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:42,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 531.0) internal successors, (7434), 14 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:42,374 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 531.0) internal successors, (7434), 14 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:42,374 INFO L175 Difference]: Start difference. First operand has 204 places, 610 transitions, 9144 flow. Second operand 13 states and 3632 transitions. [2022-12-13 13:56:42,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1180 transitions, 16648 flow [2022-12-13 13:56:54,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1180 transitions, 16509 flow, removed 63 selfloop flow, removed 3 redundant places. [2022-12-13 13:56:54,291 INFO L231 Difference]: Finished difference. Result has 218 places, 704 transitions, 11676 flow [2022-12-13 13:56:54,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=8970, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11676, PETRI_PLACES=218, PETRI_TRANSITIONS=704} [2022-12-13 13:56:54,291 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 142 predicate places. [2022-12-13 13:56:54,291 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 704 transitions, 11676 flow [2022-12-13 13:56:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 251.66666666666666) internal successors, (2265), 9 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:54,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:56:54,292 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:56:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 13:56:54,292 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:56:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:56:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1675381191, now seen corresponding path program 2 times [2022-12-13 13:56:54,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:56:54,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409744489] [2022-12-13 13:56:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:56:54,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:56:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:56:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:56:54,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:56:54,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409744489] [2022-12-13 13:56:54,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409744489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:56:54,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:56:54,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:56:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056875115] [2022-12-13 13:56:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:56:54,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:56:54,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:56:54,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:56:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:56:54,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 531 [2022-12-13 13:56:54,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 704 transitions, 11676 flow. Second operand has 9 states, 9 states have (on average 252.66666666666666) internal successors, (2274), 9 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:56:54,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:56:54,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 531 [2022-12-13 13:56:54,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:57:19,005 INFO L130 PetriNetUnfolder]: 69288/120006 cut-off events. [2022-12-13 13:57:19,005 INFO L131 PetriNetUnfolder]: For 846148/848224 co-relation queries the response was YES. [2022-12-13 13:57:19,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514804 conditions, 120006 events. 69288/120006 cut-off events. For 846148/848224 co-relation queries the response was YES. Maximal size of possible extension queue 3057. Compared 1144733 event pairs, 20849 based on Foata normal form. 2101/90374 useless extension candidates. Maximal degree in co-relation 514742. Up to 38909 conditions per place. [2022-12-13 13:57:20,309 INFO L137 encePairwiseOnDemand]: 518/531 looper letters, 1089 selfloop transitions, 105 changer transitions 0/1215 dead transitions. [2022-12-13 13:57:20,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1215 transitions, 19031 flow [2022-12-13 13:57:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:57:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 13:57:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2533 transitions. [2022-12-13 13:57:20,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5300272023435866 [2022-12-13 13:57:20,313 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2533 transitions. [2022-12-13 13:57:20,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2533 transitions. [2022-12-13 13:57:20,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:57:20,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2533 transitions. [2022-12-13 13:57:20,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.44444444444446) internal successors, (2533), 9 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:20,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 531.0) internal successors, (5310), 10 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:20,319 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 531.0) internal successors, (5310), 10 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:20,319 INFO L175 Difference]: Start difference. First operand has 218 places, 704 transitions, 11676 flow. Second operand 9 states and 2533 transitions. [2022-12-13 13:57:20,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1215 transitions, 19031 flow [2022-12-13 13:57:33,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 1215 transitions, 18585 flow, removed 60 selfloop flow, removed 5 redundant places. [2022-12-13 13:57:33,497 INFO L231 Difference]: Finished difference. Result has 225 places, 752 transitions, 12495 flow [2022-12-13 13:57:33,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=11043, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12495, PETRI_PLACES=225, PETRI_TRANSITIONS=752} [2022-12-13 13:57:33,498 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 149 predicate places. [2022-12-13 13:57:33,498 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 752 transitions, 12495 flow [2022-12-13 13:57:33,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 252.66666666666666) internal successors, (2274), 9 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:33,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:57:33,498 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:57:33,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 13:57:33,498 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:57:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:57:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1153440811, now seen corresponding path program 3 times [2022-12-13 13:57:33,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:57:33,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269945804] [2022-12-13 13:57:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:57:33,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:57:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:57:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:57:33,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:57:33,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269945804] [2022-12-13 13:57:33,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269945804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:57:33,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:57:33,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 13:57:33,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281305276] [2022-12-13 13:57:33,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:57:33,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:57:33,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:57:33,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:57:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:57:35,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 531 [2022-12-13 13:57:35,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 752 transitions, 12495 flow. Second operand has 14 states, 14 states have (on average 237.14285714285714) internal successors, (3320), 14 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:57:35,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:57:35,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 531 [2022-12-13 13:57:35,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:01,659 INFO L130 PetriNetUnfolder]: 73426/125639 cut-off events. [2022-12-13 13:58:01,660 INFO L131 PetriNetUnfolder]: For 907992/908942 co-relation queries the response was YES. [2022-12-13 13:58:02,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543402 conditions, 125639 events. 73426/125639 cut-off events. For 907992/908942 co-relation queries the response was YES. Maximal size of possible extension queue 3038. Compared 1182723 event pairs, 32622 based on Foata normal form. 897/93119 useless extension candidates. Maximal degree in co-relation 543339. Up to 112254 conditions per place. [2022-12-13 13:58:02,991 INFO L137 encePairwiseOnDemand]: 512/531 looper letters, 931 selfloop transitions, 145 changer transitions 0/1092 dead transitions. [2022-12-13 13:58:02,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1092 transitions, 16397 flow [2022-12-13 13:58:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:58:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 13:58:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 6061 transitions. [2022-12-13 13:58:02,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47559635907093534 [2022-12-13 13:58:02,998 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 6061 transitions. [2022-12-13 13:58:02,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 6061 transitions. [2022-12-13 13:58:02,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:02,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 6061 transitions. [2022-12-13 13:58:03,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 252.54166666666666) internal successors, (6061), 24 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:03,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 531.0) internal successors, (13275), 25 states have internal predecessors, (13275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:03,012 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 531.0) internal successors, (13275), 25 states have internal predecessors, (13275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:03,013 INFO L175 Difference]: Start difference. First operand has 225 places, 752 transitions, 12495 flow. Second operand 24 states and 6061 transitions. [2022-12-13 13:58:03,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1092 transitions, 16397 flow [2022-12-13 13:58:19,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1092 transitions, 16325 flow, removed 22 selfloop flow, removed 4 redundant places. [2022-12-13 13:58:19,727 INFO L231 Difference]: Finished difference. Result has 252 places, 810 transitions, 13888 flow [2022-12-13 13:58:19,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=12428, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13888, PETRI_PLACES=252, PETRI_TRANSITIONS=810} [2022-12-13 13:58:19,728 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 176 predicate places. [2022-12-13 13:58:19,728 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 810 transitions, 13888 flow [2022-12-13 13:58:19,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 237.14285714285714) internal successors, (3320), 14 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:19,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:58:19,729 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:58:19,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 13:58:19,729 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:58:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:58:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash -327797059, now seen corresponding path program 4 times [2022-12-13 13:58:19,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:58:19,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547111945] [2022-12-13 13:58:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:58:19,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:58:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:58:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:58:19,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:58:19,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547111945] [2022-12-13 13:58:19,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547111945] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:58:19,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:58:19,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:58:19,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574587152] [2022-12-13 13:58:19,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:58:19,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:58:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:58:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:58:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:58:20,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 531 [2022-12-13 13:58:20,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 810 transitions, 13888 flow. Second operand has 9 states, 9 states have (on average 252.66666666666666) internal successors, (2274), 9 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:20,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:58:20,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 531 [2022-12-13 13:58:20,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:58:47,109 INFO L130 PetriNetUnfolder]: 70025/121600 cut-off events. [2022-12-13 13:58:47,109 INFO L131 PetriNetUnfolder]: For 946240/948840 co-relation queries the response was YES. [2022-12-13 13:58:48,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537077 conditions, 121600 events. 70025/121600 cut-off events. For 946240/948840 co-relation queries the response was YES. Maximal size of possible extension queue 3049. Compared 1164421 event pairs, 20413 based on Foata normal form. 1793/91290 useless extension candidates. Maximal degree in co-relation 537006. Up to 68180 conditions per place. [2022-12-13 13:58:48,517 INFO L137 encePairwiseOnDemand]: 518/531 looper letters, 1022 selfloop transitions, 106 changer transitions 0/1153 dead transitions. [2022-12-13 13:58:48,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1153 transitions, 19018 flow [2022-12-13 13:58:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:58:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 13:58:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2518 transitions. [2022-12-13 13:58:48,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5268884703912953 [2022-12-13 13:58:48,521 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2518 transitions. [2022-12-13 13:58:48,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2518 transitions. [2022-12-13 13:58:48,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:58:48,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2518 transitions. [2022-12-13 13:58:48,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 279.77777777777777) internal successors, (2518), 9 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:48,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 531.0) internal successors, (5310), 10 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:48,527 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 531.0) internal successors, (5310), 10 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:58:48,527 INFO L175 Difference]: Start difference. First operand has 252 places, 810 transitions, 13888 flow. Second operand 9 states and 2518 transitions. [2022-12-13 13:58:48,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1153 transitions, 19018 flow [2022-12-13 13:59:10,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1153 transitions, 18651 flow, removed 165 selfloop flow, removed 7 redundant places. [2022-12-13 13:59:10,037 INFO L231 Difference]: Finished difference. Result has 255 places, 818 transitions, 14020 flow [2022-12-13 13:59:10,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=13464, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14020, PETRI_PLACES=255, PETRI_TRANSITIONS=818} [2022-12-13 13:59:10,037 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 179 predicate places. [2022-12-13 13:59:10,037 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 818 transitions, 14020 flow [2022-12-13 13:59:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 252.66666666666666) internal successors, (2274), 9 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:10,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:59:10,038 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:59:10,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 13:59:10,038 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 13:59:10,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:59:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash -980089381, now seen corresponding path program 2 times [2022-12-13 13:59:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:59:10,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629447172] [2022-12-13 13:59:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:59:10,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:59:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:59:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:59:10,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:59:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629447172] [2022-12-13 13:59:10,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629447172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:59:10,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:59:10,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:59:10,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324826988] [2022-12-13 13:59:10,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:59:10,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:59:10,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:59:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:59:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:59:10,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 531 [2022-12-13 13:59:10,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 818 transitions, 14020 flow. Second operand has 9 states, 9 states have (on average 252.55555555555554) internal successors, (2273), 9 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:10,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:59:10,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 531 [2022-12-13 13:59:10,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:59:45,541 INFO L130 PetriNetUnfolder]: 87428/152200 cut-off events. [2022-12-13 13:59:45,541 INFO L131 PetriNetUnfolder]: For 1165206/1168029 co-relation queries the response was YES. [2022-12-13 13:59:46,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672380 conditions, 152200 events. 87428/152200 cut-off events. For 1165206/1168029 co-relation queries the response was YES. Maximal size of possible extension queue 3802. Compared 1506752 event pairs, 25983 based on Foata normal form. 1759/114348 useless extension candidates. Maximal degree in co-relation 672306. Up to 99745 conditions per place. [2022-12-13 13:59:47,577 INFO L137 encePairwiseOnDemand]: 518/531 looper letters, 1208 selfloop transitions, 93 changer transitions 0/1326 dead transitions. [2022-12-13 13:59:47,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1326 transitions, 22545 flow [2022-12-13 13:59:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:59:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 13:59:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2523 transitions. [2022-12-13 13:59:47,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5279347143753923 [2022-12-13 13:59:47,580 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2523 transitions. [2022-12-13 13:59:47,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2523 transitions. [2022-12-13 13:59:47,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:59:47,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2523 transitions. [2022-12-13 13:59:47,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.3333333333333) internal successors, (2523), 9 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:47,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 531.0) internal successors, (5310), 10 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:47,586 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 531.0) internal successors, (5310), 10 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:59:47,586 INFO L175 Difference]: Start difference. First operand has 255 places, 818 transitions, 14020 flow. Second operand 9 states and 2523 transitions. [2022-12-13 13:59:47,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1326 transitions, 22545 flow [2022-12-13 14:00:24,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1326 transitions, 22493 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 14:00:24,701 INFO L231 Difference]: Finished difference. Result has 262 places, 882 transitions, 15747 flow [2022-12-13 14:00:24,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=13980, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15747, PETRI_PLACES=262, PETRI_TRANSITIONS=882} [2022-12-13 14:00:24,702 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 186 predicate places. [2022-12-13 14:00:24,702 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 882 transitions, 15747 flow [2022-12-13 14:00:24,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 252.55555555555554) internal successors, (2273), 9 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:24,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:24,702 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 14:00:24,703 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 14:00:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1675381226, now seen corresponding path program 3 times [2022-12-13 14:00:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:00:24,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893908856] [2022-12-13 14:00:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:00:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:00:24,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:00:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893908856] [2022-12-13 14:00:24,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893908856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:24,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:24,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:00:24,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981416279] [2022-12-13 14:00:24,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:24,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:00:24,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:00:24,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:00:24,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:00:25,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 531 [2022-12-13 14:00:25,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 882 transitions, 15747 flow. Second operand has 9 states, 9 states have (on average 251.66666666666666) internal successors, (2265), 9 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:00:25,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:25,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 531 [2022-12-13 14:00:25,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:02,657 INFO L130 PetriNetUnfolder]: 87409/151253 cut-off events. [2022-12-13 14:01:02,657 INFO L131 PetriNetUnfolder]: For 1239638/1242389 co-relation queries the response was YES. [2022-12-13 14:01:04,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676017 conditions, 151253 events. 87409/151253 cut-off events. For 1239638/1242389 co-relation queries the response was YES. Maximal size of possible extension queue 3754. Compared 1486081 event pairs, 16722 based on Foata normal form. 1975/113272 useless extension candidates. Maximal degree in co-relation 675939. Up to 50195 conditions per place. [2022-12-13 14:01:04,588 INFO L137 encePairwiseOnDemand]: 515/531 looper letters, 1072 selfloop transitions, 383 changer transitions 0/1480 dead transitions. [2022-12-13 14:01:04,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1480 transitions, 23638 flow [2022-12-13 14:01:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:01:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 14:01:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3648 transitions. [2022-12-13 14:01:04,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5284658843980878 [2022-12-13 14:01:04,593 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3648 transitions. [2022-12-13 14:01:04,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3648 transitions. [2022-12-13 14:01:04,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:04,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3648 transitions. [2022-12-13 14:01:04,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 280.61538461538464) internal successors, (3648), 13 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:04,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 531.0) internal successors, (7434), 14 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:04,605 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 531.0) internal successors, (7434), 14 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:04,605 INFO L175 Difference]: Start difference. First operand has 262 places, 882 transitions, 15747 flow. Second operand 13 states and 3648 transitions. [2022-12-13 14:01:04,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1480 transitions, 23638 flow [2022-12-13 14:01:41,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1480 transitions, 23515 flow, removed 40 selfloop flow, removed 4 redundant places. [2022-12-13 14:01:41,153 INFO L231 Difference]: Finished difference. Result has 273 places, 895 transitions, 16877 flow [2022-12-13 14:01:41,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=15419, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16877, PETRI_PLACES=273, PETRI_TRANSITIONS=895} [2022-12-13 14:01:41,155 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 197 predicate places. [2022-12-13 14:01:41,155 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 895 transitions, 16877 flow [2022-12-13 14:01:41,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 251.66666666666666) internal successors, (2265), 9 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:41,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:41,155 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:41,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 14:01:41,156 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting writer_fnErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 14:01:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash -391165364, now seen corresponding path program 4 times [2022-12-13 14:01:41,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:01:41,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756410705] [2022-12-13 14:01:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:41,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:01:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:01:41,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:01:41,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756410705] [2022-12-13 14:01:41,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756410705] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:41,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:41,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:01:41,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140820] [2022-12-13 14:01:41,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:41,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:01:41,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:01:41,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:01:41,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:01:41,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 531 [2022-12-13 14:01:41,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 895 transitions, 16877 flow. Second operand has 9 states, 9 states have (on average 252.66666666666666) internal successors, (2274), 9 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:41,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:41,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 531 [2022-12-13 14:01:41,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:02:21,119 INFO L130 PetriNetUnfolder]: 87207/151937 cut-off events. [2022-12-13 14:02:21,119 INFO L131 PetriNetUnfolder]: For 1365820/1367741 co-relation queries the response was YES. [2022-12-13 14:02:22,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695231 conditions, 151937 events. 87207/151937 cut-off events. For 1365820/1367741 co-relation queries the response was YES. Maximal size of possible extension queue 3735. Compared 1503584 event pairs, 16348 based on Foata normal form. 1441/113723 useless extension candidates. Maximal degree in co-relation 695150. Up to 97770 conditions per place. [2022-12-13 14:02:23,196 INFO L137 encePairwiseOnDemand]: 518/531 looper letters, 833 selfloop transitions, 279 changer transitions 0/1137 dead transitions. [2022-12-13 14:02:23,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1137 transitions, 20722 flow [2022-12-13 14:02:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:02:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 14:02:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2506 transitions. [2022-12-13 14:02:23,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5243774848294622 [2022-12-13 14:02:23,200 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2506 transitions. [2022-12-13 14:02:23,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2506 transitions. [2022-12-13 14:02:23,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:02:23,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2506 transitions. [2022-12-13 14:02:23,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 278.44444444444446) internal successors, (2506), 9 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:23,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 531.0) internal successors, (5310), 10 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:23,210 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 531.0) internal successors, (5310), 10 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:23,210 INFO L175 Difference]: Start difference. First operand has 273 places, 895 transitions, 16877 flow. Second operand 9 states and 2506 transitions. [2022-12-13 14:02:23,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1137 transitions, 20722 flow [2022-12-13 14:03:01,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1137 transitions, 20484 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-12-13 14:03:01,336 INFO L231 Difference]: Finished difference. Result has 277 places, 892 transitions, 17393 flow [2022-12-13 14:03:01,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=16556, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17393, PETRI_PLACES=277, PETRI_TRANSITIONS=892} [2022-12-13 14:03:01,336 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 201 predicate places. [2022-12-13 14:03:01,336 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 892 transitions, 17393 flow [2022-12-13 14:03:01,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 252.66666666666666) internal successors, (2274), 9 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:01,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:03:01,337 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:03:01,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 14:03:01,337 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 14:03:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:03:01,337 INFO L85 PathProgramCache]: Analyzing trace with hash -391165399, now seen corresponding path program 5 times [2022-12-13 14:03:01,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:03:01,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950296204] [2022-12-13 14:03:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:03:01,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:03:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:03:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:03:01,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:03:01,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950296204] [2022-12-13 14:03:01,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950296204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:03:01,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:03:01,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:03:01,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876238440] [2022-12-13 14:03:01,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:03:01,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:03:01,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:03:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:03:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:03:02,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 531 [2022-12-13 14:03:02,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 892 transitions, 17393 flow. Second operand has 9 states, 9 states have (on average 251.66666666666666) internal successors, (2265), 9 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:02,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:03:02,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 531 [2022-12-13 14:03:02,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:03:41,050 INFO L130 PetriNetUnfolder]: 87334/151567 cut-off events. [2022-12-13 14:03:41,050 INFO L131 PetriNetUnfolder]: For 1457507/1459356 co-relation queries the response was YES. [2022-12-13 14:03:42,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702248 conditions, 151567 events. 87334/151567 cut-off events. For 1457507/1459356 co-relation queries the response was YES. Maximal size of possible extension queue 3685. Compared 1490565 event pairs, 10638 based on Foata normal form. 1401/113214 useless extension candidates. Maximal degree in co-relation 702165. Up to 72118 conditions per place. [2022-12-13 14:03:43,102 INFO L137 encePairwiseOnDemand]: 515/531 looper letters, 769 selfloop transitions, 454 changer transitions 0/1248 dead transitions. [2022-12-13 14:03:43,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 1248 transitions, 21987 flow [2022-12-13 14:03:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:03:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 14:03:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3605 transitions. [2022-12-13 14:03:43,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5222367086773867 [2022-12-13 14:03:43,106 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3605 transitions. [2022-12-13 14:03:43,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3605 transitions. [2022-12-13 14:03:43,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:03:43,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3605 transitions. [2022-12-13 14:03:43,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 277.3076923076923) internal successors, (3605), 13 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:43,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 531.0) internal successors, (7434), 14 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:43,114 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 531.0) internal successors, (7434), 14 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:03:43,114 INFO L175 Difference]: Start difference. First operand has 277 places, 892 transitions, 17393 flow. Second operand 13 states and 3605 transitions. [2022-12-13 14:03:43,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 1248 transitions, 21987 flow [2022-12-13 14:04:22,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1248 transitions, 21595 flow, removed 53 selfloop flow, removed 5 redundant places. [2022-12-13 14:04:22,164 INFO L231 Difference]: Finished difference. Result has 285 places, 910 transitions, 18359 flow [2022-12-13 14:04:22,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=16857, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18359, PETRI_PLACES=285, PETRI_TRANSITIONS=910} [2022-12-13 14:04:22,165 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 209 predicate places. [2022-12-13 14:04:22,165 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 910 transitions, 18359 flow [2022-12-13 14:04:22,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 251.66666666666666) internal successors, (2265), 9 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:04:22,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:04:22,165 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:04:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 14:04:22,166 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-12-13 14:04:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:04:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1592957588, now seen corresponding path program 1 times [2022-12-13 14:04:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:04:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556300375] [2022-12-13 14:04:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:04:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:04:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:04:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:04:22,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:04:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556300375] [2022-12-13 14:04:22,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556300375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:04:22,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:04:22,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:04:22,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704490754] [2022-12-13 14:04:22,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:04:22,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:04:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:04:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:04:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:04:22,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 531 [2022-12-13 14:04:22,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 910 transitions, 18359 flow. Second operand has 9 states, 9 states have (on average 252.55555555555554) internal successors, (2273), 9 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:04:22,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:04:22,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 531 [2022-12-13 14:04:22,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand