./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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-6b4ec56 [2022-11-20 10:30:42,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:30:42,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:30:42,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:30:42,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:30:42,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:30:42,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:30:42,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:30:42,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:30:42,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:30:42,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:30:42,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:30:42,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:30:42,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:30:42,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:30:42,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:30:42,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:30:42,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:30:42,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:30:42,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:30:42,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:30:42,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:30:42,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:30:42,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:30:42,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:30:42,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:30:42,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:30:42,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:30:42,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:30:42,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:30:42,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:30:42,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:30:42,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:30:42,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:30:42,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:30:42,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:30:42,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:30:42,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:30:42,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:30:42,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:30:42,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:30:42,234 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 10:30:42,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:30:42,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:30:42,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:30:42,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:30:42,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:30:42,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:30:42,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:30:42,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:30:42,298 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:30:42,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:30:42,299 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:30:42,300 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:30:42,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:30:42,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:30:42,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:30:42,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:30:42,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:30:42,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:30:42,301 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 10:30:42,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:30:42,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:30:42,302 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:30:42,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:30:42,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:30:42,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:30:42,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:30:42,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:42,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:30:42,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:30:42,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:30:42,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:30:42,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:30:42,305 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:30:42,305 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:30:42,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:30:42,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-20 10:30:42,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:30:42,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:30:42,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:30:42,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:30:42,655 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:30:42,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-20 10:30:45,813 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:30:46,017 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:30:46,017 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-20 10:30:46,025 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/data/93393809b/29cf363c7f934b8d8071a98c8dbfcf3c/FLAG0e05fb959 [2022-11-20 10:30:46,043 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/data/93393809b/29cf363c7f934b8d8071a98c8dbfcf3c [2022-11-20 10:30:46,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:30:46,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:30:46,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:46,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:30:46,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:30:46,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b767734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46, skipping insertion in model container [2022-11-20 10:30:46,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:30:46,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:30:46,287 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_0ee9b956-7c1b-4769-ab44-576550b80e04/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-20 10:30:46,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:46,303 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:30:46,329 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_0ee9b956-7c1b-4769-ab44-576550b80e04/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-20 10:30:46,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:46,350 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:30:46,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46 WrapperNode [2022-11-20 10:30:46,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:46,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:46,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:30:46,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:30:46,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,401 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 161 [2022-11-20 10:30:46,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:46,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:30:46,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:30:46,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:30:46,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,436 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:30:46,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:30:46,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:30:46,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:30:46,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (1/1) ... [2022-11-20 10:30:46,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:46,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:30:46,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:30:46,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:30:46,544 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:30:46,544 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:30:46,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:30:46,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:30:46,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:30:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:30:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:30:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:30:46,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:30:46,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:30:46,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:30:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:30:46,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:30:46,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:30:46,556 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:30:46,686 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:30:46,688 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:30:47,199 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:30:47,396 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:30:47,397 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:30:47,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:47 BoogieIcfgContainer [2022-11-20 10:30:47,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:30:47,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:30:47,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:30:47,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:30:47,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:30:46" (1/3) ... [2022-11-20 10:30:47,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147fa0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:47, skipping insertion in model container [2022-11-20 10:30:47,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:46" (2/3) ... [2022-11-20 10:30:47,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147fa0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:47, skipping insertion in model container [2022-11-20 10:30:47,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:47" (3/3) ... [2022-11-20 10:30:47,431 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-11-20 10:30:47,443 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:30:47,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:30:47,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-20 10:30:47,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:30:47,594 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:30:47,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 157 transitions, 330 flow [2022-11-20 10:30:47,846 INFO L130 PetriNetUnfolder]: 11/155 cut-off events. [2022-11-20 10:30:47,851 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:30:47,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 11/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 182 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-11-20 10:30:47,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 157 transitions, 330 flow [2022-11-20 10:30:47,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 136 transitions, 281 flow [2022-11-20 10:30:47,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:30:47,912 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;@46a13954, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:30:47,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-20 10:30:47,934 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-11-20 10:30:47,934 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:30:47,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:47,935 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:47,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1121129848, now seen corresponding path program 1 times [2022-11-20 10:30:47,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:47,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022628166] [2022-11-20 10:30:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:47,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:48,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:48,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022628166] [2022-11-20 10:30:48,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022628166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:48,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:48,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443026902] [2022-11-20 10:30:48,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:48,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:30:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:48,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:30:48,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:48,542 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-11-20 10:30:48,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 136 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:48,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:48,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-11-20 10:30:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:48,809 INFO L130 PetriNetUnfolder]: 27/270 cut-off events. [2022-11-20 10:30:48,809 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-11-20 10:30:48,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 270 events. 27/270 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 967 event pairs, 16 based on Foata normal form. 46/276 useless extension candidates. Maximal degree in co-relation 182. Up to 43 conditions per place. [2022-11-20 10:30:48,814 INFO L137 encePairwiseOnDemand]: 145/157 looper letters, 40 selfloop transitions, 4 changer transitions 2/150 dead transitions. [2022-11-20 10:30:48,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 150 transitions, 406 flow [2022-11-20 10:30:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:30:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:30:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 676 transitions. [2022-11-20 10:30:48,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8611464968152867 [2022-11-20 10:30:48,836 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 676 transitions. [2022-11-20 10:30:48,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 676 transitions. [2022-11-20 10:30:48,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:48,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 676 transitions. [2022-11-20 10:30:48,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:48,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:48,860 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:48,862 INFO L175 Difference]: Start difference. First operand has 133 places, 136 transitions, 281 flow. Second operand 5 states and 676 transitions. [2022-11-20 10:30:48,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 150 transitions, 406 flow [2022-11-20 10:30:48,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 150 transitions, 396 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:30:48,872 INFO L231 Difference]: Finished difference. Result has 137 places, 131 transitions, 290 flow [2022-11-20 10:30:48,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=137, PETRI_TRANSITIONS=131} [2022-11-20 10:30:48,879 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 4 predicate places. [2022-11-20 10:30:48,879 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 131 transitions, 290 flow [2022-11-20 10:30:48,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:48,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:48,881 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:48,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:30:48,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1831626791, now seen corresponding path program 1 times [2022-11-20 10:30:48,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:48,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749819230] [2022-11-20 10:30:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:48,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:49,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:49,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749819230] [2022-11-20 10:30:49,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749819230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:49,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775017656] [2022-11-20 10:30:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:49,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:49,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:49,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:30:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:49,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:49,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:49,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775017656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:49,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:49,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 10:30:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926682337] [2022-11-20 10:30:49,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:49,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:30:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:30:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:30:49,448 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-11-20 10:30:49,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 131 transitions, 290 flow. Second operand has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:49,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-11-20 10:30:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:49,856 INFO L130 PetriNetUnfolder]: 66/597 cut-off events. [2022-11-20 10:30:49,856 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-20 10:30:49,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 597 events. 66/597 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3207 event pairs, 40 based on Foata normal form. 3/510 useless extension candidates. Maximal degree in co-relation 624. Up to 45 conditions per place. [2022-11-20 10:30:49,863 INFO L137 encePairwiseOnDemand]: 150/157 looper letters, 88 selfloop transitions, 18 changer transitions 0/210 dead transitions. [2022-11-20 10:30:49,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 210 transitions, 698 flow [2022-11-20 10:30:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:30:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:30:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2341 transitions. [2022-11-20 10:30:49,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8283793347487615 [2022-11-20 10:30:49,870 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2341 transitions. [2022-11-20 10:30:49,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2341 transitions. [2022-11-20 10:30:49,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:49,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2341 transitions. [2022-11-20 10:30:49,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.05555555555554) internal successors, (2341), 18 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,887 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,888 INFO L175 Difference]: Start difference. First operand has 137 places, 131 transitions, 290 flow. Second operand 18 states and 2341 transitions. [2022-11-20 10:30:49,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 210 transitions, 698 flow [2022-11-20 10:30:49,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 210 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:30:49,893 INFO L231 Difference]: Finished difference. Result has 155 places, 143 transitions, 394 flow [2022-11-20 10:30:49,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=394, PETRI_PLACES=155, PETRI_TRANSITIONS=143} [2022-11-20 10:30:49,895 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 22 predicate places. [2022-11-20 10:30:49,895 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 143 transitions, 394 flow [2022-11-20 10:30:49,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:49,897 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:49,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:50,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:50,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:50,105 INFO L85 PathProgramCache]: Analyzing trace with hash 945856016, now seen corresponding path program 1 times [2022-11-20 10:30:50,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:50,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248636464] [2022-11-20 10:30:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:50,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:50,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:50,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248636464] [2022-11-20 10:30:50,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248636464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:50,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139772986] [2022-11-20 10:30:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:50,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:50,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:50,310 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:50,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:30:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:50,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:50,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:30:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139772986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:50,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:30:50,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 10:30:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752135788] [2022-11-20 10:30:50,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:50,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:30:50,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:30:50,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:30:50,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-11-20 10:30:50,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 143 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:50,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:50,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-11-20 10:30:50,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:50,693 INFO L130 PetriNetUnfolder]: 66/593 cut-off events. [2022-11-20 10:30:50,693 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-11-20 10:30:50,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 593 events. 66/593 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3188 event pairs, 40 based on Foata normal form. 4/507 useless extension candidates. Maximal degree in co-relation 668. Up to 136 conditions per place. [2022-11-20 10:30:50,699 INFO L137 encePairwiseOnDemand]: 152/157 looper letters, 41 selfloop transitions, 11 changer transitions 0/156 dead transitions. [2022-11-20 10:30:50,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 156 transitions, 511 flow [2022-11-20 10:30:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:30:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:30:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 912 transitions. [2022-11-20 10:30:50,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8298453139217471 [2022-11-20 10:30:50,703 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 912 transitions. [2022-11-20 10:30:50,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 912 transitions. [2022-11-20 10:30:50,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:50,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 912 transitions. [2022-11-20 10:30:50,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.28571428571428) internal successors, (912), 7 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:50,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:50,713 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:50,713 INFO L175 Difference]: Start difference. First operand has 155 places, 143 transitions, 394 flow. Second operand 7 states and 912 transitions. [2022-11-20 10:30:50,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 156 transitions, 511 flow [2022-11-20 10:30:50,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 156 transitions, 479 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 10:30:50,725 INFO L231 Difference]: Finished difference. Result has 151 places, 139 transitions, 357 flow [2022-11-20 10:30:50,726 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=151, PETRI_TRANSITIONS=139} [2022-11-20 10:30:50,728 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 18 predicate places. [2022-11-20 10:30:50,728 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 139 transitions, 357 flow [2022-11-20 10:30:50,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:50,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:50,729 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:50,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:50,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:50,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1969607666, now seen corresponding path program 1 times [2022-11-20 10:30:50,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:50,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283764448] [2022-11-20 10:30:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:50,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:51,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:51,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283764448] [2022-11-20 10:30:51,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283764448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:51,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:51,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:30:51,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418059692] [2022-11-20 10:30:51,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:51,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:30:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:30:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:51,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-11-20 10:30:51,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 139 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:51,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-11-20 10:30:51,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:51,550 INFO L130 PetriNetUnfolder]: 606/2113 cut-off events. [2022-11-20 10:30:51,550 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-20 10:30:51,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 2113 events. 606/2113 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 14588 event pairs, 210 based on Foata normal form. 0/1538 useless extension candidates. Maximal degree in co-relation 2696. Up to 609 conditions per place. [2022-11-20 10:30:51,570 INFO L137 encePairwiseOnDemand]: 151/157 looper letters, 49 selfloop transitions, 7 changer transitions 0/171 dead transitions. [2022-11-20 10:30:51,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 171 transitions, 536 flow [2022-11-20 10:30:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:30:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:30:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 678 transitions. [2022-11-20 10:30:51,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636942675159236 [2022-11-20 10:30:51,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 678 transitions. [2022-11-20 10:30:51,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 678 transitions. [2022-11-20 10:30:51,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:51,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 678 transitions. [2022-11-20 10:30:51,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,579 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,580 INFO L175 Difference]: Start difference. First operand has 151 places, 139 transitions, 357 flow. Second operand 5 states and 678 transitions. [2022-11-20 10:30:51,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 171 transitions, 536 flow [2022-11-20 10:30:51,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 171 transitions, 522 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:30:51,585 INFO L231 Difference]: Finished difference. Result has 154 places, 145 transitions, 399 flow [2022-11-20 10:30:51,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=154, PETRI_TRANSITIONS=145} [2022-11-20 10:30:51,586 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 21 predicate places. [2022-11-20 10:30:51,586 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 145 transitions, 399 flow [2022-11-20 10:30:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:51,587 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:51,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:30:51,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1043761423, now seen corresponding path program 1 times [2022-11-20 10:30:51,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:51,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840192585] [2022-11-20 10:30:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:51,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:51,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840192585] [2022-11-20 10:30:51,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840192585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:51,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:51,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:30:51,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845106353] [2022-11-20 10:30:51,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:51,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:30:51,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:51,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:30:51,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:30:51,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 157 [2022-11-20 10:30:51,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 145 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:51,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:51,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 157 [2022-11-20 10:30:51,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:52,337 INFO L130 PetriNetUnfolder]: 561/2723 cut-off events. [2022-11-20 10:30:52,338 INFO L131 PetriNetUnfolder]: For 798/798 co-relation queries the response was YES. [2022-11-20 10:30:52,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 2723 events. 561/2723 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 20776 event pairs, 185 based on Foata normal form. 0/2398 useless extension candidates. Maximal degree in co-relation 3652. Up to 624 conditions per place. [2022-11-20 10:30:52,359 INFO L137 encePairwiseOnDemand]: 150/157 looper letters, 35 selfloop transitions, 5 changer transitions 0/155 dead transitions. [2022-11-20 10:30:52,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 155 transitions, 508 flow [2022-11-20 10:30:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:30:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:30:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2022-11-20 10:30:52,362 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8248407643312102 [2022-11-20 10:30:52,362 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2022-11-20 10:30:52,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2022-11-20 10:30:52,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:52,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2022-11-20 10:30:52,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.5) internal successors, (777), 6 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:52,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:52,368 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:52,368 INFO L175 Difference]: Start difference. First operand has 154 places, 145 transitions, 399 flow. Second operand 6 states and 777 transitions. [2022-11-20 10:30:52,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 155 transitions, 508 flow [2022-11-20 10:30:52,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 155 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:30:52,374 INFO L231 Difference]: Finished difference. Result has 158 places, 144 transitions, 413 flow [2022-11-20 10:30:52,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2022-11-20 10:30:52,376 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 25 predicate places. [2022-11-20 10:30:52,376 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 413 flow [2022-11-20 10:30:52,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:52,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:52,377 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:52,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:30:52,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1043761422, now seen corresponding path program 1 times [2022-11-20 10:30:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:52,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660688080] [2022-11-20 10:30:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:52,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:52,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660688080] [2022-11-20 10:30:52,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660688080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:52,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:52,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:30:52,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203443210] [2022-11-20 10:30:52,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:52,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:30:52,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:30:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:30:52,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 157 [2022-11-20 10:30:52,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 144 transitions, 413 flow. Second operand has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:52,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:52,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 157 [2022-11-20 10:30:52,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:53,091 INFO L130 PetriNetUnfolder]: 310/2095 cut-off events. [2022-11-20 10:30:53,091 INFO L131 PetriNetUnfolder]: For 550/550 co-relation queries the response was YES. [2022-11-20 10:30:53,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3350 conditions, 2095 events. 310/2095 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 15674 event pairs, 169 based on Foata normal form. 2/1834 useless extension candidates. Maximal degree in co-relation 3192. Up to 581 conditions per place. [2022-11-20 10:30:53,106 INFO L137 encePairwiseOnDemand]: 149/157 looper letters, 38 selfloop transitions, 6 changer transitions 5/151 dead transitions. [2022-11-20 10:30:53,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 151 transitions, 533 flow [2022-11-20 10:30:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:30:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:30:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 858 transitions. [2022-11-20 10:30:53,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7807097361237488 [2022-11-20 10:30:53,112 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 858 transitions. [2022-11-20 10:30:53,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 858 transitions. [2022-11-20 10:30:53,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:53,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 858 transitions. [2022-11-20 10:30:53,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:53,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:53,118 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:53,118 INFO L175 Difference]: Start difference. First operand has 158 places, 144 transitions, 413 flow. Second operand 7 states and 858 transitions. [2022-11-20 10:30:53,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 151 transitions, 533 flow [2022-11-20 10:30:53,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 151 transitions, 528 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:30:53,126 INFO L231 Difference]: Finished difference. Result has 163 places, 144 transitions, 426 flow [2022-11-20 10:30:53,127 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=163, PETRI_TRANSITIONS=144} [2022-11-20 10:30:53,129 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 30 predicate places. [2022-11-20 10:30:53,130 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 144 transitions, 426 flow [2022-11-20 10:30:53,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:53,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:53,132 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:53,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:30:53,133 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 186976831, now seen corresponding path program 1 times [2022-11-20 10:30:53,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:53,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388744582] [2022-11-20 10:30:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:53,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:53,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:53,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388744582] [2022-11-20 10:30:53,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388744582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:53,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465650202] [2022-11-20 10:30:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:53,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:53,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:53,607 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:53,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:30:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:30:53,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:53,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:30:53,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465650202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:53,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:30:53,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2022-11-20 10:30:53,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8014778] [2022-11-20 10:30:53,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:53,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:30:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:30:53,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:30:53,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 157 [2022-11-20 10:30:53,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 144 transitions, 426 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:53,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:53,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 157 [2022-11-20 10:30:53,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:54,201 INFO L130 PetriNetUnfolder]: 217/985 cut-off events. [2022-11-20 10:30:54,201 INFO L131 PetriNetUnfolder]: For 327/327 co-relation queries the response was YES. [2022-11-20 10:30:54,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 985 events. 217/985 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5453 event pairs, 16 based on Foata normal form. 88/933 useless extension candidates. Maximal degree in co-relation 1753. Up to 242 conditions per place. [2022-11-20 10:30:54,210 INFO L137 encePairwiseOnDemand]: 147/157 looper letters, 13 selfloop transitions, 10 changer transitions 9/147 dead transitions. [2022-11-20 10:30:54,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 147 transitions, 497 flow [2022-11-20 10:30:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:30:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:30:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 775 transitions. [2022-11-20 10:30:54,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8227176220806794 [2022-11-20 10:30:54,214 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 775 transitions. [2022-11-20 10:30:54,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 775 transitions. [2022-11-20 10:30:54,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:54,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 775 transitions. [2022-11-20 10:30:54,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.16666666666666) internal successors, (775), 6 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:54,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:54,221 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:54,221 INFO L175 Difference]: Start difference. First operand has 163 places, 144 transitions, 426 flow. Second operand 6 states and 775 transitions. [2022-11-20 10:30:54,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 147 transitions, 497 flow [2022-11-20 10:30:54,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 147 transitions, 483 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-20 10:30:54,226 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 399 flow [2022-11-20 10:30:54,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=159, PETRI_TRANSITIONS=135} [2022-11-20 10:30:54,227 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 26 predicate places. [2022-11-20 10:30:54,227 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 399 flow [2022-11-20 10:30:54,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:54,228 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:54,228 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:54,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:54,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:30:54,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash -443758792, now seen corresponding path program 2 times [2022-11-20 10:30:54,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:54,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168523590] [2022-11-20 10:30:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:54,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:54,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168523590] [2022-11-20 10:30:54,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168523590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45994656] [2022-11-20 10:30:54,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:30:54,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:54,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:54,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:54,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:30:54,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:30:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:54,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:30:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:30:54,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:30:55,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45994656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:55,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:55,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 10:30:55,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814321825] [2022-11-20 10:30:55,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:55,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:30:55,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:30:55,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:30:55,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 157 [2022-11-20 10:30:55,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 135 transitions, 399 flow. Second operand has 18 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:55,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:55,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 157 [2022-11-20 10:30:55,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:56,200 INFO L130 PetriNetUnfolder]: 139/1525 cut-off events. [2022-11-20 10:30:56,201 INFO L131 PetriNetUnfolder]: For 491/503 co-relation queries the response was YES. [2022-11-20 10:30:56,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 1525 events. 139/1525 cut-off events. For 491/503 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 9671 event pairs, 36 based on Foata normal form. 2/1287 useless extension candidates. Maximal degree in co-relation 2258. Up to 103 conditions per place. [2022-11-20 10:30:56,213 INFO L137 encePairwiseOnDemand]: 146/157 looper letters, 96 selfloop transitions, 25 changer transitions 0/213 dead transitions. [2022-11-20 10:30:56,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 213 transitions, 966 flow [2022-11-20 10:30:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:30:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 10:30:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2823 transitions. [2022-11-20 10:30:56,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7492038216560509 [2022-11-20 10:30:56,221 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2823 transitions. [2022-11-20 10:30:56,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2823 transitions. [2022-11-20 10:30:56,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:56,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2823 transitions. [2022-11-20 10:30:56,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 117.625) internal successors, (2823), 24 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 157.0) internal successors, (3925), 25 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,241 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 157.0) internal successors, (3925), 25 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,241 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 399 flow. Second operand 24 states and 2823 transitions. [2022-11-20 10:30:56,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 213 transitions, 966 flow [2022-11-20 10:30:56,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 213 transitions, 857 flow, removed 1 selfloop flow, removed 12 redundant places. [2022-11-20 10:30:56,248 INFO L231 Difference]: Finished difference. Result has 166 places, 139 transitions, 429 flow [2022-11-20 10:30:56,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=429, PETRI_PLACES=166, PETRI_TRANSITIONS=139} [2022-11-20 10:30:56,252 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 33 predicate places. [2022-11-20 10:30:56,252 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 139 transitions, 429 flow [2022-11-20 10:30:56,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:56,254 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:56,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 10:30:56,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:56,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1404550366, now seen corresponding path program 1 times [2022-11-20 10:30:56,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:56,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278901820] [2022-11-20 10:30:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:56,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:56,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:56,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278901820] [2022-11-20 10:30:56,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278901820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:56,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:56,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:30:56,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826552445] [2022-11-20 10:30:56,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:56,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:30:56,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:56,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:30:56,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:30:56,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 157 [2022-11-20 10:30:56,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 139 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:56,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 157 [2022-11-20 10:30:56,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:57,036 INFO L130 PetriNetUnfolder]: 577/2047 cut-off events. [2022-11-20 10:30:57,036 INFO L131 PetriNetUnfolder]: For 718/718 co-relation queries the response was YES. [2022-11-20 10:30:57,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 2047 events. 577/2047 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 12529 event pairs, 54 based on Foata normal form. 0/1849 useless extension candidates. Maximal degree in co-relation 1895. Up to 338 conditions per place. [2022-11-20 10:30:57,052 INFO L137 encePairwiseOnDemand]: 147/157 looper letters, 40 selfloop transitions, 9 changer transitions 0/163 dead transitions. [2022-11-20 10:30:57,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 163 transitions, 599 flow [2022-11-20 10:30:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:30:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:30:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 897 transitions. [2022-11-20 10:30:57,055 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.816196542311192 [2022-11-20 10:30:57,055 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 897 transitions. [2022-11-20 10:30:57,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 897 transitions. [2022-11-20 10:30:57,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:57,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 897 transitions. [2022-11-20 10:30:57,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.14285714285714) internal successors, (897), 7 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,061 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,061 INFO L175 Difference]: Start difference. First operand has 166 places, 139 transitions, 429 flow. Second operand 7 states and 897 transitions. [2022-11-20 10:30:57,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 163 transitions, 599 flow [2022-11-20 10:30:57,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 163 transitions, 541 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-20 10:30:57,066 INFO L231 Difference]: Finished difference. Result has 158 places, 141 transitions, 409 flow [2022-11-20 10:30:57,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=158, PETRI_TRANSITIONS=141} [2022-11-20 10:30:57,067 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 25 predicate places. [2022-11-20 10:30:57,067 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 141 transitions, 409 flow [2022-11-20 10:30:57,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,067 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:57,068 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:57,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:30:57,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash -591387892, now seen corresponding path program 1 times [2022-11-20 10:30:57,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:57,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425837440] [2022-11-20 10:30:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:57,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:57,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:57,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425837440] [2022-11-20 10:30:57,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425837440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:57,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:57,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:30:57,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246264261] [2022-11-20 10:30:57,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:57,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:30:57,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:30:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:30:57,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 157 [2022-11-20 10:30:57,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 141 transitions, 409 flow. Second operand has 5 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:57,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 157 [2022-11-20 10:30:57,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:57,575 INFO L130 PetriNetUnfolder]: 517/1939 cut-off events. [2022-11-20 10:30:57,576 INFO L131 PetriNetUnfolder]: For 784/784 co-relation queries the response was YES. [2022-11-20 10:30:57,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3846 conditions, 1939 events. 517/1939 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 11755 event pairs, 126 based on Foata normal form. 0/1813 useless extension candidates. Maximal degree in co-relation 1821. Up to 478 conditions per place. [2022-11-20 10:30:57,592 INFO L137 encePairwiseOnDemand]: 151/157 looper letters, 27 selfloop transitions, 6 changer transitions 0/145 dead transitions. [2022-11-20 10:30:57,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 145 transitions, 491 flow [2022-11-20 10:30:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:30:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:30:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2022-11-20 10:30:57,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7949044585987262 [2022-11-20 10:30:57,596 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2022-11-20 10:30:57,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2022-11-20 10:30:57,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:57,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2022-11-20 10:30:57,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,601 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,601 INFO L175 Difference]: Start difference. First operand has 158 places, 141 transitions, 409 flow. Second operand 5 states and 624 transitions. [2022-11-20 10:30:57,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 145 transitions, 491 flow [2022-11-20 10:30:57,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 145 transitions, 479 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:30:57,606 INFO L231 Difference]: Finished difference. Result has 157 places, 140 transitions, 407 flow [2022-11-20 10:30:57,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=407, PETRI_PLACES=157, PETRI_TRANSITIONS=140} [2022-11-20 10:30:57,607 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 24 predicate places. [2022-11-20 10:30:57,607 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 140 transitions, 407 flow [2022-11-20 10:30:57,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:57,608 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:57,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:30:57,609 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:30:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:57,609 INFO L85 PathProgramCache]: Analyzing trace with hash -80350811, now seen corresponding path program 1 times [2022-11-20 10:30:57,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:57,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475029886] [2022-11-20 10:30:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:57,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:59,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475029886] [2022-11-20 10:30:59,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475029886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:59,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586063319] [2022-11-20 10:30:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:59,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:59,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:59,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:30:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 10:30:59,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:59,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-20 10:30:59,785 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 10:30:59,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:31:00,102 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-20 10:31:00,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 10:31:00,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:31:01,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:31:01,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:31:02,242 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:31:02,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:31:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:02,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:08,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:08,061 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-20 10:31:08,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:08,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2022-11-20 10:31:08,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 56 [2022-11-20 10:31:08,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 10:31:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:10,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586063319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:10,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:10,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 25] total 72 [2022-11-20 10:31:10,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158206505] [2022-11-20 10:31:10,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:10,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-20 10:31:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-20 10:31:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4936, Unknown=3, NotChecked=0, Total=5256 [2022-11-20 10:31:10,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 157 [2022-11-20 10:31:10,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 140 transitions, 407 flow. Second operand has 73 states, 73 states have (on average 68.15068493150685) internal successors, (4975), 73 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:10,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:10,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 157 [2022-11-20 10:31:10,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:15,894 INFO L130 PetriNetUnfolder]: 2786/5861 cut-off events. [2022-11-20 10:31:15,894 INFO L131 PetriNetUnfolder]: For 2572/2572 co-relation queries the response was YES. [2022-11-20 10:31:15,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13021 conditions, 5861 events. 2786/5861 cut-off events. For 2572/2572 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 39850 event pairs, 1364 based on Foata normal form. 0/5505 useless extension candidates. Maximal degree in co-relation 5331. Up to 4095 conditions per place. [2022-11-20 10:31:15,956 INFO L137 encePairwiseOnDemand]: 113/157 looper letters, 100 selfloop transitions, 96 changer transitions 3/249 dead transitions. [2022-11-20 10:31:15,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 249 transitions, 1112 flow [2022-11-20 10:31:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:31:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 10:31:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2755 transitions. [2022-11-20 10:31:15,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4499428384778703 [2022-11-20 10:31:15,968 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2755 transitions. [2022-11-20 10:31:15,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2755 transitions. [2022-11-20 10:31:15,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:15,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2755 transitions. [2022-11-20 10:31:15,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 70.64102564102564) internal successors, (2755), 39 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:16,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 157.0) internal successors, (6280), 40 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:16,017 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 157.0) internal successors, (6280), 40 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:16,018 INFO L175 Difference]: Start difference. First operand has 157 places, 140 transitions, 407 flow. Second operand 39 states and 2755 transitions. [2022-11-20 10:31:16,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 249 transitions, 1112 flow [2022-11-20 10:31:16,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 249 transitions, 1096 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:31:16,031 INFO L231 Difference]: Finished difference. Result has 207 places, 228 transitions, 1013 flow [2022-11-20 10:31:16,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1013, PETRI_PLACES=207, PETRI_TRANSITIONS=228} [2022-11-20 10:31:16,033 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 74 predicate places. [2022-11-20 10:31:16,033 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 228 transitions, 1013 flow [2022-11-20 10:31:16,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 68.15068493150685) internal successors, (4975), 73 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:16,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:16,035 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:16,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:16,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:16,241 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:31:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash -29896670, now seen corresponding path program 1 times [2022-11-20 10:31:16,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:16,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702777757] [2022-11-20 10:31:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:16,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:16,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:16,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702777757] [2022-11-20 10:31:16,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702777757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:16,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:31:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976412320] [2022-11-20 10:31:16,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:16,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:31:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:31:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:31:16,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 157 [2022-11-20 10:31:16,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 228 transitions, 1013 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:16,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:16,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 157 [2022-11-20 10:31:16,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:17,288 INFO L130 PetriNetUnfolder]: 1200/4369 cut-off events. [2022-11-20 10:31:17,289 INFO L131 PetriNetUnfolder]: For 1945/2561 co-relation queries the response was YES. [2022-11-20 10:31:17,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9571 conditions, 4369 events. 1200/4369 cut-off events. For 1945/2561 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 34701 event pairs, 523 based on Foata normal form. 131/4336 useless extension candidates. Maximal degree in co-relation 8832. Up to 1524 conditions per place. [2022-11-20 10:31:17,325 INFO L137 encePairwiseOnDemand]: 154/157 looper letters, 64 selfloop transitions, 2 changer transitions 0/232 dead transitions. [2022-11-20 10:31:17,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 232 transitions, 1155 flow [2022-11-20 10:31:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:31:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:31:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2022-11-20 10:31:17,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8768577494692145 [2022-11-20 10:31:17,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2022-11-20 10:31:17,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2022-11-20 10:31:17,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:17,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2022-11-20 10:31:17,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:17,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:17,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:17,330 INFO L175 Difference]: Start difference. First operand has 207 places, 228 transitions, 1013 flow. Second operand 3 states and 413 transitions. [2022-11-20 10:31:17,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 232 transitions, 1155 flow [2022-11-20 10:31:17,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 232 transitions, 1081 flow, removed 22 selfloop flow, removed 15 redundant places. [2022-11-20 10:31:17,349 INFO L231 Difference]: Finished difference. Result has 194 places, 228 transitions, 945 flow [2022-11-20 10:31:17,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=945, PETRI_PLACES=194, PETRI_TRANSITIONS=228} [2022-11-20 10:31:17,351 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 61 predicate places. [2022-11-20 10:31:17,351 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 228 transitions, 945 flow [2022-11-20 10:31:17,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:17,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:17,352 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:17,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:31:17,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:31:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1804092655, now seen corresponding path program 1 times [2022-11-20 10:31:17,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:17,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670933651] [2022-11-20 10:31:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:17,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:17,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670933651] [2022-11-20 10:31:17,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670933651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:17,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:17,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:31:17,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205000273] [2022-11-20 10:31:17,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:17,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:31:17,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:31:17,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:31:17,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 157 [2022-11-20 10:31:17,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 228 transitions, 945 flow. Second operand has 8 states, 8 states have (on average 110.375) internal successors, (883), 8 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:17,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:17,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 157 [2022-11-20 10:31:17,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:19,522 INFO L130 PetriNetUnfolder]: 3320/7807 cut-off events. [2022-11-20 10:31:19,522 INFO L131 PetriNetUnfolder]: For 6350/6365 co-relation queries the response was YES. [2022-11-20 10:31:19,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20558 conditions, 7807 events. 3320/7807 cut-off events. For 6350/6365 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 58325 event pairs, 322 based on Foata normal form. 176/7807 useless extension candidates. Maximal degree in co-relation 18714. Up to 3451 conditions per place. [2022-11-20 10:31:19,609 INFO L137 encePairwiseOnDemand]: 146/157 looper letters, 161 selfloop transitions, 17 changer transitions 0/293 dead transitions. [2022-11-20 10:31:19,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 293 transitions, 1616 flow [2022-11-20 10:31:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:31:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 10:31:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1150 transitions. [2022-11-20 10:31:19,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.732484076433121 [2022-11-20 10:31:19,612 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1150 transitions. [2022-11-20 10:31:19,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1150 transitions. [2022-11-20 10:31:19,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:19,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1150 transitions. [2022-11-20 10:31:19,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.0) internal successors, (1150), 10 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:19,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:19,618 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:19,619 INFO L175 Difference]: Start difference. First operand has 194 places, 228 transitions, 945 flow. Second operand 10 states and 1150 transitions. [2022-11-20 10:31:19,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 293 transitions, 1616 flow [2022-11-20 10:31:19,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 293 transitions, 1614 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:31:19,641 INFO L231 Difference]: Finished difference. Result has 207 places, 235 transitions, 1046 flow [2022-11-20 10:31:19,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1046, PETRI_PLACES=207, PETRI_TRANSITIONS=235} [2022-11-20 10:31:19,642 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 74 predicate places. [2022-11-20 10:31:19,642 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 235 transitions, 1046 flow [2022-11-20 10:31:19,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 110.375) internal successors, (883), 8 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:19,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:19,643 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:19,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 10:31:19,644 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:31:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1735879897, now seen corresponding path program 1 times [2022-11-20 10:31:19,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:19,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923572891] [2022-11-20 10:31:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:19,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923572891] [2022-11-20 10:31:19,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923572891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132472032] [2022-11-20 10:31:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:19,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:19,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:19,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:31:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:31:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:31:20,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:31:20,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132472032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:20,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:20,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-20 10:31:20,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461438883] [2022-11-20 10:31:20,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:20,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:31:20,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:31:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:31:20,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 157 [2022-11-20 10:31:20,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 235 transitions, 1046 flow. Second operand has 15 states, 15 states have (on average 113.8) internal successors, (1707), 15 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:20,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:20,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 157 [2022-11-20 10:31:20,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:24,135 INFO L130 PetriNetUnfolder]: 6242/14500 cut-off events. [2022-11-20 10:31:24,135 INFO L131 PetriNetUnfolder]: For 15434/15538 co-relation queries the response was YES. [2022-11-20 10:31:24,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40551 conditions, 14500 events. 6242/14500 cut-off events. For 15434/15538 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 122755 event pairs, 1210 based on Foata normal form. 271/14317 useless extension candidates. Maximal degree in co-relation 38627. Up to 6530 conditions per place. [2022-11-20 10:31:24,289 INFO L137 encePairwiseOnDemand]: 138/157 looper letters, 219 selfloop transitions, 85 changer transitions 0/440 dead transitions. [2022-11-20 10:31:24,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 440 transitions, 2762 flow [2022-11-20 10:31:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:31:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-20 10:31:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2642 transitions. [2022-11-20 10:31:24,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7316532816394351 [2022-11-20 10:31:24,298 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2642 transitions. [2022-11-20 10:31:24,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2642 transitions. [2022-11-20 10:31:24,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:24,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2642 transitions. [2022-11-20 10:31:24,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 114.8695652173913) internal successors, (2642), 23 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:24,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:24,317 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:24,317 INFO L175 Difference]: Start difference. First operand has 207 places, 235 transitions, 1046 flow. Second operand 23 states and 2642 transitions. [2022-11-20 10:31:24,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 440 transitions, 2762 flow [2022-11-20 10:31:24,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 440 transitions, 2708 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-20 10:31:24,374 INFO L231 Difference]: Finished difference. Result has 233 places, 306 transitions, 1793 flow [2022-11-20 10:31:24,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1793, PETRI_PLACES=233, PETRI_TRANSITIONS=306} [2022-11-20 10:31:24,375 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 100 predicate places. [2022-11-20 10:31:24,376 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 306 transitions, 1793 flow [2022-11-20 10:31:24,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 113.8) internal successors, (1707), 15 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:24,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:24,378 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:24,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:24,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:24,584 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:31:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1727805194, now seen corresponding path program 1 times [2022-11-20 10:31:24,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:24,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572394387] [2022-11-20 10:31:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:24,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:24,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:24,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572394387] [2022-11-20 10:31:24,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572394387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:24,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:24,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:31:24,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977614179] [2022-11-20 10:31:24,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:24,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:31:24,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:31:24,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:31:24,771 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 157 [2022-11-20 10:31:24,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 306 transitions, 1793 flow. Second operand has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 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) [2022-11-20 10:31:24,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:24,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 157 [2022-11-20 10:31:24,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:25,039 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([452] L37-->L38: Formula: (= |v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_3| |v_thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1_3|) InVars {thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_3|} OutVars{thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1_3|, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_3|} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1][163], [24#L101-1true, 114#L82true, Black: 1630#(and (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 2147483647) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 2147483647) (<= ~n~0 2147483647)), Black: 2436#(and (= ~sum~0 0) (= ~element~0 1)), Black: 2440#(and (= |thread1Thread1of1ForFork0_#t~mem1#1| 1) (= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 1) (= ~sum~0 0) (= ~element~0 1)), 2434#(and (= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 1) (= ~sum~0 0)), 3184#(and (<= |thread2Thread1of1ForFork1_~flag~0#1| (* (div |thread2Thread1of1ForFork1_~flag~0#1| 256) 256)) (not (<= (+ (div |thread2Thread1of1ForFork1_~flag~0#1| 256) 1) 0))), Black: 2432#(and (= ~back~0 ~front~0) (= ~sum~0 0)), Black: 2438#(and (= |thread1Thread1of1ForFork0_#t~mem1#1| 1) (= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 1) (= ~sum~0 0)), Black: 1670#true, Black: 781#(<= ~back~0 ~front~0), Black: 784#(and (<= |thread1Thread1of1ForFork0_~cond~0#1| (* 256 (div |thread1Thread1of1ForFork0_~cond~0#1| 256))) (<= ~back~0 ~front~0)), thread2Thread1of1ForFork1InUse, 96#L38true, Black: 3140#(and (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647)), Black: 3164#(and (<= |thread1Thread1of1ForFork0_~cond~0#1| (* 256 (div |thread1Thread1of1ForFork0_~cond~0#1| 256))) (<= ~n~0 2147483647) (<= ~back~0 ~front~0)), Black: 3150#(and (<= |thread1Thread1of1ForFork0_~cond~0#1| (* 256 (div |thread1Thread1of1ForFork0_~cond~0#1| 256))) (<= ~n~0 2147483647)), 1676#(and (<= ~front~0 2147483646) (<= ~front~0 ~back~0)), Black: 2534#(<= ~n~0 2147483647), Black: 3144#(and (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0) (and (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (<= ~front~0 2147483646) (<= 0 ~front~0))) (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647)), Black: 3154#(and (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0)) (<= ~front~0 2147483646) (<= |thread1Thread1of1ForFork0_#t~post2#1| 2147483646) (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647) (<= 0 ~front~0) (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 1) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 0)) (<= ~back~0 (+ |thread1Thread1of1ForFork0_#t~post2#1| 1))), Black: 2404#(and (<= |thread1Thread1of1ForFork0_#t~mem1#1| 2147483647) (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647) (<= 0 ~front~0) (<= ~element~0 2147483647) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)), Black: 3142#(and (<= ~back~0 (+ ~front~0 1)) (<= |thread1Thread1of1ForFork0_~cond~0#1| (* 256 (div |thread1Thread1of1ForFork0_~cond~0#1| 256))) (<= ~n~0 2147483647)), Black: 3148#(and (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0)) (<= ~front~0 2147483646) (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647) (<= 0 ~front~0) (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 1) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 0))), Black: 2384#(and (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (not (= |ULTIMATE.start_main_#t~ret10#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (not (= |ULTIMATE.start_main_#t~ret10#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1)) (<= (select (select |#memory_int| |ULTIMATE.start_main_#t~ret10#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) |ULTIMATE.start_main_#t~ret10#1.offset|)) 2147483647))) (= ~sum~0 0) (= |ULTIMATE.start_main_#t~ret10#1.offset| 0) (<= (select (select |#memory_int| |ULTIMATE.start_main_#t~ret10#1.base|) 0) 2147483647)), Black: 2402#(and (<= |thread1Thread1of1ForFork0_#t~mem1#1| 2147483647) (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647) (<= 0 ~front~0) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)), Black: 3146#(and (or (and (<= ~front~0 2147483646) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 1) (<= 0 ~front~0)) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 0)) (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0) (and (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (<= ~front~0 2147483646) (<= 0 ~front~0))) (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647)), Black: 3135#(and (<= ~n~0 2147483647) (<= ~back~0 ~front~0)), Black: 2378#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t2~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t1~0#1.base|) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483647) (<= |ULTIMATE.start_create_fresh_int_array_~i~0#1| (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1)))) (= ~sum~0 0) (<= ~front~0 ~back~0) (= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) 0) 2147483647) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 3160#(and (<= |thread1Thread1of1ForFork0_#t~post2#1| 2147483646) (<= ~n~0 2147483647) (<= ~back~0 ~front~0) (<= ~back~0 (+ |thread1Thread1of1ForFork0_#t~post2#1| 1))), Black: 2393#(and (<= ~sum~0 0) (or (and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647)) (not (= (+ (* ~front~0 4) ~queue~0.offset) 0))) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) ~queue~0.offset)) 2147483647) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1))))), 3156#(and (or (and (<= ~front~0 2147483646) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 1) (<= 0 ~front~0)) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 0)) (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0) (and (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (<= ~front~0 2147483646) (<= 0 ~front~0))) (<= ~n~0 2147483647)), Black: 2380#(and (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (= ~sum~0 0) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1)) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483647))) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) 0) 2147483647) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 2386#(and (or (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)) (<= ~sum~0 0) (or (and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647)) (not (= (+ (* ~front~0 4) ~queue~0.offset) 0))) (not (= ~queue~0.base |ULTIMATE.start_main_~#t2~0#1.base|)) (= ~queue~0.offset 0) (not (= ~queue~0.base |ULTIMATE.start_main_~#t1~0#1.base|)) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) ~queue~0.offset)) 2147483647) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1))))), Black: 812#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 0)), Black: 2389#(and (or (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)) (<= ~sum~0 0) (or (and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647)) (not (= (+ (* ~front~0 4) ~queue~0.offset) 0))) (not (= ~queue~0.base |ULTIMATE.start_main_~#t2~0#1.base|)) (= ~queue~0.offset 0) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) ~queue~0.offset)) 2147483647) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1))))), Black: 1714#(and (or (and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647)) (not (= (+ (* ~front~0 4) ~queue~0.offset) 0))) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)), Black: 2370#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t2~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t1~0#1.base|) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |ULTIMATE.start_create_fresh_int_array_~i~0#1| 4) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483647) (= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 0) (= ~sum~0 0) (<= ~front~0 ~back~0) (= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1) (<= |ULTIMATE.start_create_fresh_int_array_#t~nondet19#1| 2147483647) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 1717#(and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647) (<= 0 ~front~0) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)), 1693#true, Black: 2368#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t2~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t1~0#1.base|) (= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 0) (= ~sum~0 0) (<= ~front~0 ~back~0) (= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1) (<= |ULTIMATE.start_create_fresh_int_array_#t~nondet19#1| 2147483647) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), 1638#(and (<= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 2147483647) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 2147483647) (<= ~n~0 2147483647)), Black: 2382#(and (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (not (= |ULTIMATE.start_create_fresh_int_array_#res#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (= ~sum~0 0) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) |ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) 2147483647) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1)))) (not (= |ULTIMATE.start_create_fresh_int_array_#res#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_#res#1.base|) 0) 2147483647) (= 0 |ULTIMATE.start_create_fresh_int_array_#res#1.offset|)), Black: 2365#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t2~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t1~0#1.base|) (= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 0) (= ~sum~0 0) (<= ~front~0 ~back~0) (= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 2426#(= |thread2Thread1of1ForFork1_~flag~0#1| 1), Black: 166#true]) [2022-11-20 10:31:25,040 INFO L383 tUnfolder$Statistics]: this new event has 110 ancestors and is cut-off event [2022-11-20 10:31:25,040 INFO L386 tUnfolder$Statistics]: existing Event has 96 ancestors and is cut-off event [2022-11-20 10:31:25,040 INFO L386 tUnfolder$Statistics]: existing Event has 96 ancestors and is cut-off event [2022-11-20 10:31:25,040 INFO L386 tUnfolder$Statistics]: existing Event has 96 ancestors and is cut-off event [2022-11-20 10:31:27,574 INFO L130 PetriNetUnfolder]: 3863/14012 cut-off events. [2022-11-20 10:31:27,574 INFO L131 PetriNetUnfolder]: For 16471/17383 co-relation queries the response was YES. [2022-11-20 10:31:27,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37157 conditions, 14012 events. 3863/14012 cut-off events. For 16471/17383 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 140396 event pairs, 1293 based on Foata normal form. 939/14272 useless extension candidates. Maximal degree in co-relation 25474. Up to 5152 conditions per place. [2022-11-20 10:31:27,697 INFO L137 encePairwiseOnDemand]: 153/157 looper letters, 70 selfloop transitions, 4 changer transitions 1/255 dead transitions. [2022-11-20 10:31:27,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 255 transitions, 1559 flow [2022-11-20 10:31:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:31:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:31:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 543 transitions. [2022-11-20 10:31:27,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8646496815286624 [2022-11-20 10:31:27,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 543 transitions. [2022-11-20 10:31:27,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 543 transitions. [2022-11-20 10:31:27,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:27,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 543 transitions. [2022-11-20 10:31:27,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:27,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:27,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:27,703 INFO L175 Difference]: Start difference. First operand has 233 places, 306 transitions, 1793 flow. Second operand 4 states and 543 transitions. [2022-11-20 10:31:27,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 255 transitions, 1559 flow [2022-11-20 10:31:27,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 255 transitions, 1373 flow, removed 60 selfloop flow, removed 12 redundant places. [2022-11-20 10:31:27,779 INFO L231 Difference]: Finished difference. Result has 225 places, 252 transitions, 1225 flow [2022-11-20 10:31:27,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1225, PETRI_PLACES=225, PETRI_TRANSITIONS=252} [2022-11-20 10:31:27,780 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 92 predicate places. [2022-11-20 10:31:27,780 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 252 transitions, 1225 flow [2022-11-20 10:31:27,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 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) [2022-11-20 10:31:27,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:27,781 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:27,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 10:31:27,781 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:31:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:27,782 INFO L85 PathProgramCache]: Analyzing trace with hash 442561935, now seen corresponding path program 1 times [2022-11-20 10:31:27,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:27,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811382665] [2022-11-20 10:31:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:27,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:31:28,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:28,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811382665] [2022-11-20 10:31:28,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811382665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:28,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275652862] [2022-11-20 10:31:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:28,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:28,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:28,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:31:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:28,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:31:28,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:31:29,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:31:29,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275652862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:29,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:29,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-11-20 10:31:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881964126] [2022-11-20 10:31:29,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:29,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:31:29,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:31:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:31:29,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 157 [2022-11-20 10:31:29,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 252 transitions, 1225 flow. Second operand has 36 states, 36 states have (on average 101.16666666666667) internal successors, (3642), 36 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:29,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:29,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 157 [2022-11-20 10:31:29,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:34,472 INFO L130 PetriNetUnfolder]: 5253/15584 cut-off events. [2022-11-20 10:31:34,472 INFO L131 PetriNetUnfolder]: For 17466/17635 co-relation queries the response was YES. [2022-11-20 10:31:34,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42370 conditions, 15584 events. 5253/15584 cut-off events. For 17466/17635 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 150410 event pairs, 1715 based on Foata normal form. 58/14958 useless extension candidates. Maximal degree in co-relation 26687. Up to 6086 conditions per place. [2022-11-20 10:31:34,603 INFO L137 encePairwiseOnDemand]: 137/157 looper letters, 125 selfloop transitions, 19 changer transitions 137/370 dead transitions. [2022-11-20 10:31:34,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 370 transitions, 2380 flow [2022-11-20 10:31:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:31:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 10:31:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2780 transitions. [2022-11-20 10:31:34,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6558150507195093 [2022-11-20 10:31:34,609 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2780 transitions. [2022-11-20 10:31:34,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2780 transitions. [2022-11-20 10:31:34,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:34,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2780 transitions. [2022-11-20 10:31:34,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.96296296296296) internal successors, (2780), 27 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:34,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:34,623 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:34,623 INFO L175 Difference]: Start difference. First operand has 225 places, 252 transitions, 1225 flow. Second operand 27 states and 2780 transitions. [2022-11-20 10:31:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 370 transitions, 2380 flow [2022-11-20 10:31:34,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 370 transitions, 2375 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 10:31:34,683 INFO L231 Difference]: Finished difference. Result has 264 places, 202 transitions, 1019 flow [2022-11-20 10:31:34,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1019, PETRI_PLACES=264, PETRI_TRANSITIONS=202} [2022-11-20 10:31:34,684 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 131 predicate places. [2022-11-20 10:31:34,685 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 202 transitions, 1019 flow [2022-11-20 10:31:34,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 101.16666666666667) internal successors, (3642), 36 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:34,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:34,686 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:34,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:34,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:31:34,894 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:31:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2049020732, now seen corresponding path program 2 times [2022-11-20 10:31:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:34,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143882405] [2022-11-20 10:31:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:34,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:31:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:35,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143882405] [2022-11-20 10:31:35,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143882405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:35,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716840639] [2022-11-20 10:31:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:31:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:35,700 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:35,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:31:35,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:31:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:35,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-20 10:31:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:36,684 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 15 treesize of output 11 [2022-11-20 10:31:37,061 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 6 treesize of output 5 [2022-11-20 10:31:37,131 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 6 treesize of output 5 [2022-11-20 10:31:38,295 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:31:38,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-20 10:31:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:38,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:41,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:41,538 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-20 10:31:41,556 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-20 10:31:41,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 144 [2022-11-20 10:31:41,575 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-20 10:31:41,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 109 [2022-11-20 10:31:41,590 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-20 10:31:41,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 75 [2022-11-20 10:31:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:42,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716840639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:42,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:42,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 31, 28] total 71 [2022-11-20 10:31:42,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65212631] [2022-11-20 10:31:42,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:42,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-20 10:31:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:42,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-20 10:31:42,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=4654, Unknown=23, NotChecked=0, Total=5112 [2022-11-20 10:31:42,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 157 [2022-11-20 10:31:42,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 202 transitions, 1019 flow. Second operand has 72 states, 72 states have (on average 69.16666666666667) internal successors, (4980), 72 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:42,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:42,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 157 [2022-11-20 10:31:42,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:32:07,533 INFO L130 PetriNetUnfolder]: 18263/41446 cut-off events. [2022-11-20 10:32:07,533 INFO L131 PetriNetUnfolder]: For 119457/119907 co-relation queries the response was YES. [2022-11-20 10:32:07,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144898 conditions, 41446 events. 18263/41446 cut-off events. For 119457/119907 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 427313 event pairs, 1682 based on Foata normal form. 468/40418 useless extension candidates. Maximal degree in co-relation 73093. Up to 18848 conditions per place. [2022-11-20 10:32:08,081 INFO L137 encePairwiseOnDemand]: 116/157 looper letters, 624 selfloop transitions, 461 changer transitions 29/1169 dead transitions. [2022-11-20 10:32:08,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1169 transitions, 9313 flow [2022-11-20 10:32:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-20 10:32:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2022-11-20 10:32:08,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 9191 transitions. [2022-11-20 10:32:08,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4573546974522293 [2022-11-20 10:32:08,096 INFO L72 ComplementDD]: Start complementDD. Operand 128 states and 9191 transitions. [2022-11-20 10:32:08,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 9191 transitions. [2022-11-20 10:32:08,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:32:08,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 128 states and 9191 transitions. [2022-11-20 10:32:08,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 129 states, 128 states have (on average 71.8046875) internal successors, (9191), 128 states have internal predecessors, (9191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:08,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 129 states, 129 states have (on average 157.0) internal successors, (20253), 129 states have internal predecessors, (20253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:08,318 INFO L81 ComplementDD]: Finished complementDD. Result has 129 states, 129 states have (on average 157.0) internal successors, (20253), 129 states have internal predecessors, (20253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:08,318 INFO L175 Difference]: Start difference. First operand has 264 places, 202 transitions, 1019 flow. Second operand 128 states and 9191 transitions. [2022-11-20 10:32:08,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1169 transitions, 9313 flow [2022-11-20 10:32:08,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1169 transitions, 8395 flow, removed 446 selfloop flow, removed 32 redundant places. [2022-11-20 10:32:08,850 INFO L231 Difference]: Finished difference. Result has 374 places, 669 transitions, 5604 flow [2022-11-20 10:32:08,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=128, PETRI_FLOW=5604, PETRI_PLACES=374, PETRI_TRANSITIONS=669} [2022-11-20 10:32:08,851 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 241 predicate places. [2022-11-20 10:32:08,851 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 669 transitions, 5604 flow [2022-11-20 10:32:08,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 69.16666666666667) internal successors, (4980), 72 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:08,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:32:08,853 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:08,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:32:09,059 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:32:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 421743666, now seen corresponding path program 3 times [2022-11-20 10:32:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:09,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950501501] [2022-11-20 10:32:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:11,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950501501] [2022-11-20 10:32:11,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950501501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592939004] [2022-11-20 10:32:11,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:32:11,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:11,789 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:11,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:32:11,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:32:11,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:11,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:12,345 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 25 treesize of output 9 [2022-11-20 10:32:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:32:12,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:12,802 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-20 10:32:12,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-20 10:32:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:32:12,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592939004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:12,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:32:12,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10, 10] total 47 [2022-11-20 10:32:12,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243400427] [2022-11-20 10:32:12,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:12,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 10:32:12,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 10:32:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 10:32:12,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 157 [2022-11-20 10:32:12,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 669 transitions, 5604 flow. Second operand has 48 states, 48 states have (on average 76.66666666666667) internal successors, (3680), 48 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:12,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:32:12,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 157 [2022-11-20 10:32:12,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:32:44,644 INFO L130 PetriNetUnfolder]: 25019/56846 cut-off events. [2022-11-20 10:32:44,645 INFO L131 PetriNetUnfolder]: For 574080/575019 co-relation queries the response was YES. [2022-11-20 10:32:45,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286144 conditions, 56846 events. 25019/56846 cut-off events. For 574080/575019 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 617320 event pairs, 3245 based on Foata normal form. 542/55550 useless extension candidates. Maximal degree in co-relation 275845. Up to 25872 conditions per place. [2022-11-20 10:32:45,784 INFO L137 encePairwiseOnDemand]: 123/157 looper letters, 1043 selfloop transitions, 453 changer transitions 0/1554 dead transitions. [2022-11-20 10:32:45,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1554 transitions, 17527 flow [2022-11-20 10:32:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-20 10:32:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2022-11-20 10:32:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 9059 transitions. [2022-11-20 10:32:45,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5017446690667405 [2022-11-20 10:32:45,798 INFO L72 ComplementDD]: Start complementDD. Operand 115 states and 9059 transitions. [2022-11-20 10:32:45,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 9059 transitions. [2022-11-20 10:32:45,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:32:45,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 115 states and 9059 transitions. [2022-11-20 10:32:45,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 116 states, 115 states have (on average 78.77391304347826) internal successors, (9059), 115 states have internal predecessors, (9059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:45,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 116 states, 116 states have (on average 157.0) internal successors, (18212), 116 states have internal predecessors, (18212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:45,848 INFO L81 ComplementDD]: Finished complementDD. Result has 116 states, 116 states have (on average 157.0) internal successors, (18212), 116 states have internal predecessors, (18212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:45,848 INFO L175 Difference]: Start difference. First operand has 374 places, 669 transitions, 5604 flow. Second operand 115 states and 9059 transitions. [2022-11-20 10:32:45,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1554 transitions, 17527 flow [2022-11-20 10:32:57,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1554 transitions, 16555 flow, removed 373 selfloop flow, removed 24 redundant places. [2022-11-20 10:32:57,266 INFO L231 Difference]: Finished difference. Result has 521 places, 901 transitions, 8922 flow [2022-11-20 10:32:57,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=5110, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=115, PETRI_FLOW=8922, PETRI_PLACES=521, PETRI_TRANSITIONS=901} [2022-11-20 10:32:57,267 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 388 predicate places. [2022-11-20 10:32:57,267 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 901 transitions, 8922 flow [2022-11-20 10:32:57,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 76.66666666666667) internal successors, (3680), 48 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:57,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:32:57,268 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:57,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:57,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:32:57,469 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 10:32:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash 556657422, now seen corresponding path program 1 times [2022-11-20 10:32:57,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:57,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100642387] [2022-11-20 10:32:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:57,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:32:58,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100642387] [2022-11-20 10:32:58,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100642387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937777839] [2022-11-20 10:32:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:58,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:58,191 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:58,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee9b956-7c1b-4769-ab44-576550b80e04/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:32:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 10:32:58,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:00,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:33:00,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 15 [2022-11-20 10:33:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:00,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:01,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:33:01,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 70 [2022-11-20 10:33:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:03,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937777839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:03,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:33:03,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 27, 27] total 66 [2022-11-20 10:33:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733572757] [2022-11-20 10:33:03,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:03,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 10:33:03,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 10:33:03,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=3823, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 10:33:03,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 157 [2022-11-20 10:33:03,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 901 transitions, 8922 flow. Second operand has 67 states, 67 states have (on average 83.07462686567165) internal successors, (5566), 67 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:03,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:03,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 157 [2022-11-20 10:33:03,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand