./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/array-eq-trans.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_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/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_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/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_fadef0fe-1b28-4ed1-a98f-fafc9d419845/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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- 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 09:27:30,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:30,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:30,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:30,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:30,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:30,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:30,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:30,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:30,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:30,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:30,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:30,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:30,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:30,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:30,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:30,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:30,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:30,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:30,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:30,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:30,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:30,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:30,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:30,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:30,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:30,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:30,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:30,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:30,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:30,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:30,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:30,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:30,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:30,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:30,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:30,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:30,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:30,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:30,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:30,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:30,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 09:27:30,293 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:30,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:30,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:30,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:30,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:30,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:30,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:30,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:30,296 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:30,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:30,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:30,298 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:27:30,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:30,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:30,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:30,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:27:30,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:30,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:27:30,299 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 09:27:30,299 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:30,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:27:30,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:30,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:27:30,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:30,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:30,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:30,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:30,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:30,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:30,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:27:30,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:30,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:30,302 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:27:30,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:27:30,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:27:30,302 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_fadef0fe-1b28-4ed1-a98f-fafc9d419845/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-11-20 09:27:30,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:30,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:30,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:30,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:30,676 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:30,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-20 09:27:33,693 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:33,998 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:33,999 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-20 09:27:34,007 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/data/892797844/74c49302e89645b88b84a55c042df7c6/FLAG206a7dff0 [2022-11-20 09:27:34,031 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/data/892797844/74c49302e89645b88b84a55c042df7c6 [2022-11-20 09:27:34,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:34,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:34,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:34,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:34,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:34,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d8f342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34, skipping insertion in model container [2022-11-20 09:27:34,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:34,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:34,338 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_fadef0fe-1b28-4ed1-a98f-fafc9d419845/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-20 09:27:34,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:34,357 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:34,382 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_fadef0fe-1b28-4ed1-a98f-fafc9d419845/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-20 09:27:34,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:34,399 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:34,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34 WrapperNode [2022-11-20 09:27:34,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:34,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:34,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:34,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:34,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,450 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 210 [2022-11-20 09:27:34,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:34,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:34,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:34,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:34,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,511 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:34,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:34,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:34,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:34,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (1/1) ... [2022-11-20 09:27:34,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:34,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:34,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:34,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:34,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:34,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 09:27:34,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 09:27:34,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 09:27:34,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 09:27:34,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 09:27:34,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 09:27:34,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:27:34,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:27:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:27:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:27:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:27:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:27:34,626 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 09:27:34,830 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:34,845 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:35,482 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:35,501 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:35,502 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 09:27:35,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:35 BoogieIcfgContainer [2022-11-20 09:27:35,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:35,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:35,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:35,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:35,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:34" (1/3) ... [2022-11-20 09:27:35,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201e9e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:35, skipping insertion in model container [2022-11-20 09:27:35,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:34" (2/3) ... [2022-11-20 09:27:35,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201e9e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:35, skipping insertion in model container [2022-11-20 09:27:35,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:35" (3/3) ... [2022-11-20 09:27:35,520 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-11-20 09:27:35,530 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 09:27:35,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:35,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-20 09:27:35,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:27:35,632 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 09:27:35,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 329 transitions, 682 flow [2022-11-20 09:27:35,837 INFO L130 PetriNetUnfolder]: 30/326 cut-off events. [2022-11-20 09:27:35,837 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 09:27:35,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 326 events. 30/326 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 324 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 221. Up to 3 conditions per place. [2022-11-20 09:27:35,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 329 transitions, 682 flow [2022-11-20 09:27:35,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 247 transitions, 509 flow [2022-11-20 09:27:35,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:35,885 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;@685c1e01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:35,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-20 09:27:35,905 INFO L130 PetriNetUnfolder]: 3/69 cut-off events. [2022-11-20 09:27:35,907 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:35,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:35,908 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] [2022-11-20 09:27:35,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:35,916 INFO L85 PathProgramCache]: Analyzing trace with hash -895934613, now seen corresponding path program 1 times [2022-11-20 09:27:35,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571387731] [2022-11-20 09:27:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:35,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:36,356 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 09:27:36,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:36,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571387731] [2022-11-20 09:27:36,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571387731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:36,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:36,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:36,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190745853] [2022-11-20 09:27:36,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:36,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:36,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:36,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:36,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:36,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 329 [2022-11-20 09:27:36,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 247 transitions, 509 flow. Second operand has 4 states, 4 states have (on average 272.5) internal successors, (1090), 4 states have internal predecessors, (1090), 0 states have call successors, (0), 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 09:27:36,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:36,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 329 [2022-11-20 09:27:36,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:36,741 INFO L130 PetriNetUnfolder]: 17/370 cut-off events. [2022-11-20 09:27:36,741 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 09:27:36,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 370 events. 17/370 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 850 event pairs, 0 based on Foata normal form. 24/352 useless extension candidates. Maximal degree in co-relation 386. Up to 44 conditions per place. [2022-11-20 09:27:36,753 INFO L137 encePairwiseOnDemand]: 297/329 looper letters, 58 selfloop transitions, 14 changer transitions 6/266 dead transitions. [2022-11-20 09:27:36,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 266 transitions, 706 flow [2022-11-20 09:27:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:27:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:27:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1451 transitions. [2022-11-20 09:27:36,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8820668693009118 [2022-11-20 09:27:36,782 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1451 transitions. [2022-11-20 09:27:36,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1451 transitions. [2022-11-20 09:27:36,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:36,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1451 transitions. [2022-11-20 09:27:36,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.2) internal successors, (1451), 5 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:36,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 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 09:27:36,809 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 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 09:27:36,812 INFO L175 Difference]: Start difference. First operand has 236 places, 247 transitions, 509 flow. Second operand 5 states and 1451 transitions. [2022-11-20 09:27:36,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 266 transitions, 706 flow [2022-11-20 09:27:36,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 266 transitions, 688 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:27:36,823 INFO L231 Difference]: Finished difference. Result has 238 places, 240 transitions, 568 flow [2022-11-20 09:27:36,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=568, PETRI_PLACES=238, PETRI_TRANSITIONS=240} [2022-11-20 09:27:36,834 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 2 predicate places. [2022-11-20 09:27:36,834 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 240 transitions, 568 flow [2022-11-20 09:27:36,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 272.5) internal successors, (1090), 4 states have internal predecessors, (1090), 0 states have call successors, (0), 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 09:27:36,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:36,836 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, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:36,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:27:36,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash -208542109, now seen corresponding path program 1 times [2022-11-20 09:27:36,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:36,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854207829] [2022-11-20 09:27:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:36,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:37,124 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 09:27:37,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:37,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854207829] [2022-11-20 09:27:37,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854207829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603693915] [2022-11-20 09:27:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:37,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:37,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:37,130 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:37,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:27:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:27:37,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:37,398 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 09:27:37,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:37,492 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 09:27:37,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603693915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:37,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:37,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 09:27:37,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161992089] [2022-11-20 09:27:37,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:37,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:27:37,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:27:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:27:37,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 329 [2022-11-20 09:27:37,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 240 transitions, 568 flow. Second operand has 12 states, 12 states have (on average 273.6666666666667) internal successors, (3284), 12 states have internal predecessors, (3284), 0 states have call successors, (0), 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 09:27:37,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:37,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 329 [2022-11-20 09:27:37,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:38,184 INFO L130 PetriNetUnfolder]: 41/775 cut-off events. [2022-11-20 09:27:38,185 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-20 09:27:38,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 775 events. 41/775 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3054 event pairs, 0 based on Foata normal form. 9/709 useless extension candidates. Maximal degree in co-relation 480. Up to 35 conditions per place. [2022-11-20 09:27:38,192 INFO L137 encePairwiseOnDemand]: 306/329 looper letters, 109 selfloop transitions, 62 changer transitions 0/359 dead transitions. [2022-11-20 09:27:38,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 359 transitions, 1250 flow [2022-11-20 09:27:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:27:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 09:27:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5058 transitions. [2022-11-20 09:27:38,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8541033434650456 [2022-11-20 09:27:38,208 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5058 transitions. [2022-11-20 09:27:38,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5058 transitions. [2022-11-20 09:27:38,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:38,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5058 transitions. [2022-11-20 09:27:38,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 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 09:27:38,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 329.0) internal successors, (6251), 19 states have internal predecessors, (6251), 0 states have call successors, (0), 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 09:27:38,245 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 329.0) internal successors, (6251), 19 states have internal predecessors, (6251), 0 states have call successors, (0), 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 09:27:38,246 INFO L175 Difference]: Start difference. First operand has 238 places, 240 transitions, 568 flow. Second operand 18 states and 5058 transitions. [2022-11-20 09:27:38,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 359 transitions, 1250 flow [2022-11-20 09:27:38,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 359 transitions, 1242 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:38,261 INFO L231 Difference]: Finished difference. Result has 252 places, 282 transitions, 930 flow [2022-11-20 09:27:38,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=930, PETRI_PLACES=252, PETRI_TRANSITIONS=282} [2022-11-20 09:27:38,263 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 16 predicate places. [2022-11-20 09:27:38,263 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 282 transitions, 930 flow [2022-11-20 09:27:38,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 273.6666666666667) internal successors, (3284), 12 states have internal predecessors, (3284), 0 states have call successors, (0), 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 09:27:38,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:38,267 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, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:38,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:38,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:38,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2125129790, now seen corresponding path program 1 times [2022-11-20 09:27:38,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:38,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504865237] [2022-11-20 09:27:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:38,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:38,693 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 09:27:38,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:38,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504865237] [2022-11-20 09:27:38,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504865237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572093645] [2022-11-20 09:27:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:38,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:38,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:38,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:38,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:27:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:38,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:27:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:38,871 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 09:27:38,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:38,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572093645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:38,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:38,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 09:27:38,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257194924] [2022-11-20 09:27:38,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:38,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:27:38,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:27:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:27:38,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 329 [2022-11-20 09:27:38,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 282 transitions, 930 flow. Second operand has 6 states, 6 states have (on average 273.3333333333333) internal successors, (1640), 6 states have internal predecessors, (1640), 0 states have call successors, (0), 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 09:27:38,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:38,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 329 [2022-11-20 09:27:38,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:39,176 INFO L130 PetriNetUnfolder]: 41/763 cut-off events. [2022-11-20 09:27:39,176 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2022-11-20 09:27:39,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 763 events. 41/763 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2976 event pairs, 0 based on Foata normal form. 12/700 useless extension candidates. Maximal degree in co-relation 842. Up to 68 conditions per place. [2022-11-20 09:27:39,183 INFO L137 encePairwiseOnDemand]: 312/329 looper letters, 59 selfloop transitions, 43 changer transitions 0/290 dead transitions. [2022-11-20 09:27:39,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 290 transitions, 1105 flow [2022-11-20 09:27:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:27:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:27:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1969 transitions. [2022-11-20 09:27:39,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8549717759444203 [2022-11-20 09:27:39,189 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1969 transitions. [2022-11-20 09:27:39,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1969 transitions. [2022-11-20 09:27:39,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:39,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1969 transitions. [2022-11-20 09:27:39,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 281.2857142857143) internal successors, (1969), 7 states have internal predecessors, (1969), 0 states have call successors, (0), 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 09:27:39,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 329.0) internal successors, (2632), 8 states have internal predecessors, (2632), 0 states have call successors, (0), 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 09:27:39,200 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 329.0) internal successors, (2632), 8 states have internal predecessors, (2632), 0 states have call successors, (0), 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 09:27:39,201 INFO L175 Difference]: Start difference. First operand has 252 places, 282 transitions, 930 flow. Second operand 7 states and 1969 transitions. [2022-11-20 09:27:39,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 290 transitions, 1105 flow [2022-11-20 09:27:39,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 290 transitions, 989 flow, removed 41 selfloop flow, removed 5 redundant places. [2022-11-20 09:27:39,211 INFO L231 Difference]: Finished difference. Result has 246 places, 270 transitions, 819 flow [2022-11-20 09:27:39,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=819, PETRI_PLACES=246, PETRI_TRANSITIONS=270} [2022-11-20 09:27:39,212 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 10 predicate places. [2022-11-20 09:27:39,212 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 270 transitions, 819 flow [2022-11-20 09:27:39,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 273.3333333333333) internal successors, (1640), 6 states have internal predecessors, (1640), 0 states have call successors, (0), 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 09:27:39,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:39,214 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, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:39,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:39,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:39,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1474687637, now seen corresponding path program 2 times [2022-11-20 09:27:39,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:39,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419049272] [2022-11-20 09:27:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:39,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:39,759 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 09:27:39,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:39,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419049272] [2022-11-20 09:27:39,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419049272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639027909] [2022-11-20 09:27:39,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:27:39,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:39,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:39,761 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:39,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:27:39,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:27:39,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:39,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:27:39,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:40,080 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 09:27:40,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:40,283 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 09:27:40,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639027909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:40,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:40,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 09:27:40,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249672241] [2022-11-20 09:27:40,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:40,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:40,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:40,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:40,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:40,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 329 [2022-11-20 09:27:40,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 270 transitions, 819 flow. Second operand has 18 states, 18 states have (on average 248.61111111111111) internal successors, (4475), 18 states have internal predecessors, (4475), 0 states have call successors, (0), 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 09:27:40,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:40,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 329 [2022-11-20 09:27:40,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:42,082 INFO L130 PetriNetUnfolder]: 225/1907 cut-off events. [2022-11-20 09:27:42,082 INFO L131 PetriNetUnfolder]: For 273/315 co-relation queries the response was YES. [2022-11-20 09:27:42,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 1907 events. 225/1907 cut-off events. For 273/315 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 11844 event pairs, 84 based on Foata normal form. 6/1570 useless extension candidates. Maximal degree in co-relation 1686. Up to 71 conditions per place. [2022-11-20 09:27:42,103 INFO L137 encePairwiseOnDemand]: 301/329 looper letters, 178 selfloop transitions, 97 changer transitions 0/439 dead transitions. [2022-11-20 09:27:42,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 439 transitions, 1844 flow [2022-11-20 09:27:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 09:27:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 09:27:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 12286 transitions. [2022-11-20 09:27:42,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7621115315427083 [2022-11-20 09:27:42,138 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 12286 transitions. [2022-11-20 09:27:42,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 12286 transitions. [2022-11-20 09:27:42,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:42,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 12286 transitions. [2022-11-20 09:27:42,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 250.73469387755102) internal successors, (12286), 49 states have internal predecessors, (12286), 0 states have call successors, (0), 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 09:27:42,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 329.0) internal successors, (16450), 50 states have internal predecessors, (16450), 0 states have call successors, (0), 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 09:27:42,228 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 329.0) internal successors, (16450), 50 states have internal predecessors, (16450), 0 states have call successors, (0), 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 09:27:42,228 INFO L175 Difference]: Start difference. First operand has 246 places, 270 transitions, 819 flow. Second operand 49 states and 12286 transitions. [2022-11-20 09:27:42,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 439 transitions, 1844 flow [2022-11-20 09:27:42,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 439 transitions, 1775 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:27:42,240 INFO L231 Difference]: Finished difference. Result has 292 places, 310 transitions, 1162 flow [2022-11-20 09:27:42,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1162, PETRI_PLACES=292, PETRI_TRANSITIONS=310} [2022-11-20 09:27:42,242 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 56 predicate places. [2022-11-20 09:27:42,242 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 310 transitions, 1162 flow [2022-11-20 09:27:42,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 248.61111111111111) internal successors, (4475), 18 states have internal predecessors, (4475), 0 states have call successors, (0), 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 09:27:42,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:42,244 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, 1, 1, 1, 1, 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 09:27:42,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:42,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:42,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash -111854088, now seen corresponding path program 1 times [2022-11-20 09:27:42,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:42,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750334453] [2022-11-20 09:27:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:42,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:42,601 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 09:27:42,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:42,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750334453] [2022-11-20 09:27:42,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750334453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:42,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:42,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:42,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750643823] [2022-11-20 09:27:42,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:42,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:42,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:42,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:42,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:42,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 329 [2022-11-20 09:27:42,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 310 transitions, 1162 flow. Second operand has 4 states, 4 states have (on average 292.75) internal successors, (1171), 4 states have internal predecessors, (1171), 0 states have call successors, (0), 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 09:27:42,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:42,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 329 [2022-11-20 09:27:42,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:43,096 INFO L130 PetriNetUnfolder]: 372/1956 cut-off events. [2022-11-20 09:27:43,097 INFO L131 PetriNetUnfolder]: For 291/319 co-relation queries the response was YES. [2022-11-20 09:27:43,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3406 conditions, 1956 events. 372/1956 cut-off events. For 291/319 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 13725 event pairs, 56 based on Foata normal form. 0/1718 useless extension candidates. Maximal degree in co-relation 3132. Up to 421 conditions per place. [2022-11-20 09:27:43,124 INFO L137 encePairwiseOnDemand]: 323/329 looper letters, 30 selfloop transitions, 4 changer transitions 0/327 dead transitions. [2022-11-20 09:27:43,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 327 transitions, 1275 flow [2022-11-20 09:27:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:27:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:27:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1491 transitions. [2022-11-20 09:27:43,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9063829787234042 [2022-11-20 09:27:43,129 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1491 transitions. [2022-11-20 09:27:43,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1491 transitions. [2022-11-20 09:27:43,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:43,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1491 transitions. [2022-11-20 09:27:43,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.2) internal successors, (1491), 5 states have internal predecessors, (1491), 0 states have call successors, (0), 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 09:27:43,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 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 09:27:43,138 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 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 09:27:43,138 INFO L175 Difference]: Start difference. First operand has 292 places, 310 transitions, 1162 flow. Second operand 5 states and 1491 transitions. [2022-11-20 09:27:43,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 327 transitions, 1275 flow [2022-11-20 09:27:43,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 327 transitions, 1152 flow, removed 16 selfloop flow, removed 15 redundant places. [2022-11-20 09:27:43,148 INFO L231 Difference]: Finished difference. Result has 284 places, 313 transitions, 1069 flow [2022-11-20 09:27:43,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1069, PETRI_PLACES=284, PETRI_TRANSITIONS=313} [2022-11-20 09:27:43,151 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 48 predicate places. [2022-11-20 09:27:43,152 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 313 transitions, 1069 flow [2022-11-20 09:27:43,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.75) internal successors, (1171), 4 states have internal predecessors, (1171), 0 states have call successors, (0), 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 09:27:43,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:43,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:27:43,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:27:43,154 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash -597735967, now seen corresponding path program 1 times [2022-11-20 09:27:43,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:43,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789699634] [2022-11-20 09:27:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:43,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:43,344 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 09:27:43,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:43,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789699634] [2022-11-20 09:27:43,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789699634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:43,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:43,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:43,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181489042] [2022-11-20 09:27:43,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:43,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:43,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:43,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:43,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 329 [2022-11-20 09:27:43,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 313 transitions, 1069 flow. Second operand has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 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 09:27:43,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:43,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 329 [2022-11-20 09:27:43,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:44,030 INFO L130 PetriNetUnfolder]: 533/2502 cut-off events. [2022-11-20 09:27:44,030 INFO L131 PetriNetUnfolder]: For 473/473 co-relation queries the response was YES. [2022-11-20 09:27:44,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 2502 events. 533/2502 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 20449 event pairs, 84 based on Foata normal form. 0/2082 useless extension candidates. Maximal degree in co-relation 3876. Up to 582 conditions per place. [2022-11-20 09:27:44,072 INFO L137 encePairwiseOnDemand]: 323/329 looper letters, 29 selfloop transitions, 4 changer transitions 0/329 dead transitions. [2022-11-20 09:27:44,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 329 transitions, 1177 flow [2022-11-20 09:27:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:27:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:27:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1490 transitions. [2022-11-20 09:27:44,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9057750759878419 [2022-11-20 09:27:44,077 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1490 transitions. [2022-11-20 09:27:44,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1490 transitions. [2022-11-20 09:27:44,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:44,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1490 transitions. [2022-11-20 09:27:44,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 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 09:27:44,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 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 09:27:44,086 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 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 09:27:44,086 INFO L175 Difference]: Start difference. First operand has 284 places, 313 transitions, 1069 flow. Second operand 5 states and 1490 transitions. [2022-11-20 09:27:44,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 329 transitions, 1177 flow [2022-11-20 09:27:44,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 329 transitions, 1175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:44,096 INFO L231 Difference]: Finished difference. Result has 290 places, 316 transitions, 1097 flow [2022-11-20 09:27:44,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1097, PETRI_PLACES=290, PETRI_TRANSITIONS=316} [2022-11-20 09:27:44,097 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 54 predicate places. [2022-11-20 09:27:44,097 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 316 transitions, 1097 flow [2022-11-20 09:27:44,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 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 09:27:44,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:44,098 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:27:44,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:27:44,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1489725109, now seen corresponding path program 1 times [2022-11-20 09:27:44,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:44,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365980267] [2022-11-20 09:27:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:44,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:27:44,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365980267] [2022-11-20 09:27:44,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365980267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:44,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:44,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:27:44,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365764211] [2022-11-20 09:27:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:44,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:27:44,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:27:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:27:44,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 329 [2022-11-20 09:27:44,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 316 transitions, 1097 flow. Second operand has 7 states, 7 states have (on average 259.85714285714283) internal successors, (1819), 7 states have internal predecessors, (1819), 0 states have call successors, (0), 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 09:27:44,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:44,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 329 [2022-11-20 09:27:44,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:45,849 INFO L130 PetriNetUnfolder]: 841/5273 cut-off events. [2022-11-20 09:27:45,850 INFO L131 PetriNetUnfolder]: For 982/1073 co-relation queries the response was YES. [2022-11-20 09:27:45,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7939 conditions, 5273 events. 841/5273 cut-off events. For 982/1073 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 48524 event pairs, 252 based on Foata normal form. 0/4412 useless extension candidates. Maximal degree in co-relation 6983. Up to 557 conditions per place. [2022-11-20 09:27:45,935 INFO L137 encePairwiseOnDemand]: 317/329 looper letters, 181 selfloop transitions, 23 changer transitions 0/401 dead transitions. [2022-11-20 09:27:45,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 401 transitions, 1862 flow [2022-11-20 09:27:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:27:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 09:27:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2652 transitions. [2022-11-20 09:27:45,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8060790273556231 [2022-11-20 09:27:45,943 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2652 transitions. [2022-11-20 09:27:45,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2652 transitions. [2022-11-20 09:27:45,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:45,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2652 transitions. [2022-11-20 09:27:45,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 265.2) internal successors, (2652), 10 states have internal predecessors, (2652), 0 states have call successors, (0), 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 09:27:45,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 329.0) internal successors, (3619), 11 states have internal predecessors, (3619), 0 states have call successors, (0), 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 09:27:45,959 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 329.0) internal successors, (3619), 11 states have internal predecessors, (3619), 0 states have call successors, (0), 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 09:27:45,960 INFO L175 Difference]: Start difference. First operand has 290 places, 316 transitions, 1097 flow. Second operand 10 states and 2652 transitions. [2022-11-20 09:27:45,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 401 transitions, 1862 flow [2022-11-20 09:27:45,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 401 transitions, 1860 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:45,974 INFO L231 Difference]: Finished difference. Result has 300 places, 317 transitions, 1153 flow [2022-11-20 09:27:45,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1153, PETRI_PLACES=300, PETRI_TRANSITIONS=317} [2022-11-20 09:27:45,975 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 64 predicate places. [2022-11-20 09:27:45,976 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 317 transitions, 1153 flow [2022-11-20 09:27:45,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 259.85714285714283) internal successors, (1819), 7 states have internal predecessors, (1819), 0 states have call successors, (0), 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 09:27:45,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:45,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:27:45,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:27:45,977 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash 345801704, now seen corresponding path program 1 times [2022-11-20 09:27:45,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:45,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652324059] [2022-11-20 09:27:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:45,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:46,222 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 09:27:46,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:46,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652324059] [2022-11-20 09:27:46,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652324059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:46,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:46,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:46,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063221888] [2022-11-20 09:27:46,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:46,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:46,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:46,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:46,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:46,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 329 [2022-11-20 09:27:46,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 317 transitions, 1153 flow. Second operand has 4 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 0 states have call successors, (0), 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 09:27:46,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:46,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 329 [2022-11-20 09:27:46,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:48,027 INFO L130 PetriNetUnfolder]: 1513/5924 cut-off events. [2022-11-20 09:27:48,028 INFO L131 PetriNetUnfolder]: For 1617/1617 co-relation queries the response was YES. [2022-11-20 09:27:48,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9472 conditions, 5924 events. 1513/5924 cut-off events. For 1617/1617 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 60427 event pairs, 252 based on Foata normal form. 0/4727 useless extension candidates. Maximal degree in co-relation 8080. Up to 1618 conditions per place. [2022-11-20 09:27:48,101 INFO L137 encePairwiseOnDemand]: 323/329 looper letters, 28 selfloop transitions, 4 changer transitions 0/332 dead transitions. [2022-11-20 09:27:48,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 332 transitions, 1253 flow [2022-11-20 09:27:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:27:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:27:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1489 transitions. [2022-11-20 09:27:48,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9051671732522797 [2022-11-20 09:27:48,108 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1489 transitions. [2022-11-20 09:27:48,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1489 transitions. [2022-11-20 09:27:48,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:48,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1489 transitions. [2022-11-20 09:27:48,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.8) internal successors, (1489), 5 states have internal predecessors, (1489), 0 states have call successors, (0), 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 09:27:48,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 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 09:27:48,118 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 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 09:27:48,118 INFO L175 Difference]: Start difference. First operand has 300 places, 317 transitions, 1153 flow. Second operand 5 states and 1489 transitions. [2022-11-20 09:27:48,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 332 transitions, 1253 flow [2022-11-20 09:27:48,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 332 transitions, 1226 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:27:48,130 INFO L231 Difference]: Finished difference. Result has 302 places, 320 transitions, 1156 flow [2022-11-20 09:27:48,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1156, PETRI_PLACES=302, PETRI_TRANSITIONS=320} [2022-11-20 09:27:48,132 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 66 predicate places. [2022-11-20 09:27:48,132 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 320 transitions, 1156 flow [2022-11-20 09:27:48,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 0 states have call successors, (0), 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 09:27:48,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:48,133 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:27:48,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:27:48,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1373005362, now seen corresponding path program 1 times [2022-11-20 09:27:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:48,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128695861] [2022-11-20 09:27:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:48,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:48,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:48,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128695861] [2022-11-20 09:27:48,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128695861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:48,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548411552] [2022-11-20 09:27:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:48,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:48,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:48,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:48,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:27:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:48,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:27:48,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:48,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:49,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548411552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:49,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:49,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-20 09:27:49,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245476643] [2022-11-20 09:27:49,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:49,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 09:27:49,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:49,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 09:27:49,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-11-20 09:27:49,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 329 [2022-11-20 09:27:49,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 320 transitions, 1156 flow. Second operand has 32 states, 32 states have (on average 274.28125) internal successors, (8777), 32 states have internal predecessors, (8777), 0 states have call successors, (0), 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 09:27:49,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:49,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 329 [2022-11-20 09:27:49,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:51,608 INFO L130 PetriNetUnfolder]: 271/5146 cut-off events. [2022-11-20 09:27:51,609 INFO L131 PetriNetUnfolder]: For 1597/1597 co-relation queries the response was YES. [2022-11-20 09:27:51,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 5146 events. 271/5146 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 44036 event pairs, 0 based on Foata normal form. 32/4848 useless extension candidates. Maximal degree in co-relation 7159. Up to 155 conditions per place. [2022-11-20 09:27:51,672 INFO L137 encePairwiseOnDemand]: 310/329 looper letters, 308 selfloop transitions, 160 changer transitions 0/671 dead transitions. [2022-11-20 09:27:51,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 671 transitions, 3482 flow [2022-11-20 09:27:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 09:27:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-20 09:27:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 12408 transitions. [2022-11-20 09:27:51,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2022-11-20 09:27:51,689 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 12408 transitions. [2022-11-20 09:27:51,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 12408 transitions. [2022-11-20 09:27:51,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:51,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 12408 transitions. [2022-11-20 09:27:51,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 282.0) internal successors, (12408), 44 states have internal predecessors, (12408), 0 states have call successors, (0), 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 09:27:51,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 329.0) internal successors, (14805), 45 states have internal predecessors, (14805), 0 states have call successors, (0), 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 09:27:51,853 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 329.0) internal successors, (14805), 45 states have internal predecessors, (14805), 0 states have call successors, (0), 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 09:27:51,853 INFO L175 Difference]: Start difference. First operand has 302 places, 320 transitions, 1156 flow. Second operand 44 states and 12408 transitions. [2022-11-20 09:27:51,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 671 transitions, 3482 flow [2022-11-20 09:27:51,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 671 transitions, 3480 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:51,878 INFO L231 Difference]: Finished difference. Result has 353 places, 413 transitions, 2172 flow [2022-11-20 09:27:51,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2172, PETRI_PLACES=353, PETRI_TRANSITIONS=413} [2022-11-20 09:27:51,880 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 117 predicate places. [2022-11-20 09:27:51,880 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 413 transitions, 2172 flow [2022-11-20 09:27:51,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 274.28125) internal successors, (8777), 32 states have internal predecessors, (8777), 0 states have call successors, (0), 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 09:27:51,883 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:51,883 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:27:51,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:52,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 09:27:52,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash -437552810, now seen corresponding path program 1 times [2022-11-20 09:27:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:52,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351501363] [2022-11-20 09:27:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:27:52,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351501363] [2022-11-20 09:27:52,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351501363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:52,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:52,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:27:52,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571149217] [2022-11-20 09:27:52,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:52,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:27:52,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:27:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:27:52,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 329 [2022-11-20 09:27:52,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 413 transitions, 2172 flow. Second operand has 7 states, 7 states have (on average 260.0) internal successors, (1820), 7 states have internal predecessors, (1820), 0 states have call successors, (0), 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 09:27:52,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:52,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 329 [2022-11-20 09:27:52,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:59,289 INFO L130 PetriNetUnfolder]: 5896/27860 cut-off events. [2022-11-20 09:27:59,289 INFO L131 PetriNetUnfolder]: For 7418/7673 co-relation queries the response was YES. [2022-11-20 09:27:59,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48823 conditions, 27860 events. 5896/27860 cut-off events. For 7418/7673 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 324472 event pairs, 2100 based on Foata normal form. 0/25190 useless extension candidates. Maximal degree in co-relation 47052. Up to 3931 conditions per place. [2022-11-20 09:27:59,715 INFO L137 encePairwiseOnDemand]: 317/329 looper letters, 218 selfloop transitions, 32 changer transitions 0/477 dead transitions. [2022-11-20 09:27:59,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 477 transitions, 3003 flow [2022-11-20 09:27:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:27:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 09:27:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2639 transitions. [2022-11-20 09:27:59,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8021276595744681 [2022-11-20 09:27:59,740 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2639 transitions. [2022-11-20 09:27:59,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2639 transitions. [2022-11-20 09:27:59,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:59,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2639 transitions. [2022-11-20 09:27:59,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 263.9) internal successors, (2639), 10 states have internal predecessors, (2639), 0 states have call successors, (0), 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 09:27:59,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 329.0) internal successors, (3619), 11 states have internal predecessors, (3619), 0 states have call successors, (0), 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 09:27:59,754 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 329.0) internal successors, (3619), 11 states have internal predecessors, (3619), 0 states have call successors, (0), 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 09:27:59,754 INFO L175 Difference]: Start difference. First operand has 353 places, 413 transitions, 2172 flow. Second operand 10 states and 2639 transitions. [2022-11-20 09:27:59,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 477 transitions, 3003 flow [2022-11-20 09:27:59,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 477 transitions, 2880 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-11-20 09:27:59,863 INFO L231 Difference]: Finished difference. Result has 348 places, 414 transitions, 2141 flow [2022-11-20 09:27:59,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2141, PETRI_PLACES=348, PETRI_TRANSITIONS=414} [2022-11-20 09:27:59,865 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 112 predicate places. [2022-11-20 09:27:59,865 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 414 transitions, 2141 flow [2022-11-20 09:27:59,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 260.0) internal successors, (1820), 7 states have internal predecessors, (1820), 0 states have call successors, (0), 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 09:27:59,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:59,866 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:27:59,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 09:27:59,867 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:27:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:59,867 INFO L85 PathProgramCache]: Analyzing trace with hash -811293357, now seen corresponding path program 1 times [2022-11-20 09:27:59,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:59,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044609607] [2022-11-20 09:27:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:59,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 09:28:00,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:00,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044609607] [2022-11-20 09:28:00,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044609607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:00,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:00,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:28:00,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582659867] [2022-11-20 09:28:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:00,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:28:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:28:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:00,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 329 [2022-11-20 09:28:00,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 414 transitions, 2141 flow. Second operand has 7 states, 7 states have (on average 260.42857142857144) internal successors, (1823), 7 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:00,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:00,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 329 [2022-11-20 09:28:00,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:05,356 INFO L130 PetriNetUnfolder]: 4411/21050 cut-off events. [2022-11-20 09:28:05,356 INFO L131 PetriNetUnfolder]: For 6701/6911 co-relation queries the response was YES. [2022-11-20 09:28:05,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37871 conditions, 21050 events. 4411/21050 cut-off events. For 6701/6911 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 235970 event pairs, 1710 based on Foata normal form. 75/19445 useless extension candidates. Maximal degree in co-relation 36098. Up to 3302 conditions per place. [2022-11-20 09:28:05,640 INFO L137 encePairwiseOnDemand]: 317/329 looper letters, 218 selfloop transitions, 32 changer transitions 0/477 dead transitions. [2022-11-20 09:28:05,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 477 transitions, 2950 flow [2022-11-20 09:28:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:28:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 09:28:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2639 transitions. [2022-11-20 09:28:05,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8021276595744681 [2022-11-20 09:28:05,646 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2639 transitions. [2022-11-20 09:28:05,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2639 transitions. [2022-11-20 09:28:05,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:05,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2639 transitions. [2022-11-20 09:28:05,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 263.9) internal successors, (2639), 10 states have internal predecessors, (2639), 0 states have call successors, (0), 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 09:28:05,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 329.0) internal successors, (3619), 11 states have internal predecessors, (3619), 0 states have call successors, (0), 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 09:28:05,659 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 329.0) internal successors, (3619), 11 states have internal predecessors, (3619), 0 states have call successors, (0), 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 09:28:05,660 INFO L175 Difference]: Start difference. First operand has 348 places, 414 transitions, 2141 flow. Second operand 10 states and 2639 transitions. [2022-11-20 09:28:05,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 477 transitions, 2950 flow [2022-11-20 09:28:05,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 477 transitions, 2906 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:05,737 INFO L231 Difference]: Finished difference. Result has 353 places, 414 transitions, 2167 flow [2022-11-20 09:28:05,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2098, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2167, PETRI_PLACES=353, PETRI_TRANSITIONS=414} [2022-11-20 09:28:05,739 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 117 predicate places. [2022-11-20 09:28:05,739 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 414 transitions, 2167 flow [2022-11-20 09:28:05,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 260.42857142857144) internal successors, (1823), 7 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:05,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:05,740 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:28:05,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 09:28:05,741 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:28:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash 21152899, now seen corresponding path program 1 times [2022-11-20 09:28:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:05,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824856393] [2022-11-20 09:28:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:05,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:28:06,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:06,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824856393] [2022-11-20 09:28:06,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824856393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:06,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:06,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:28:06,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610103767] [2022-11-20 09:28:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:28:06,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:28:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:06,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 329 [2022-11-20 09:28:06,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 414 transitions, 2167 flow. Second operand has 7 states, 7 states have (on average 260.14285714285717) internal successors, (1821), 7 states have internal predecessors, (1821), 0 states have call successors, (0), 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 09:28:06,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:06,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 329 [2022-11-20 09:28:06,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:10,504 INFO L130 PetriNetUnfolder]: 3601/17990 cut-off events. [2022-11-20 09:28:10,504 INFO L131 PetriNetUnfolder]: For 8248/8473 co-relation queries the response was YES. [2022-11-20 09:28:10,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31109 conditions, 17990 events. 3601/17990 cut-off events. For 8248/8473 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 203320 event pairs, 1290 based on Foata normal form. 0/15950 useless extension candidates. Maximal degree in co-relation 28809. Up to 2971 conditions per place. [2022-11-20 09:28:10,709 INFO L137 encePairwiseOnDemand]: 317/329 looper letters, 277 selfloop transitions, 31 changer transitions 1/536 dead transitions. [2022-11-20 09:28:10,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 536 transitions, 3543 flow [2022-11-20 09:28:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:28:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 09:28:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2649 transitions. [2022-11-20 09:28:10,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8051671732522796 [2022-11-20 09:28:10,714 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2649 transitions. [2022-11-20 09:28:10,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2649 transitions. [2022-11-20 09:28:10,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:10,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2649 transitions. [2022-11-20 09:28:10,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 264.9) internal successors, (2649), 10 states have internal predecessors, (2649), 0 states have call successors, (0), 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 09:28:10,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 329.0) internal successors, (3619), 11 states have internal predecessors, (3619), 0 states have call successors, (0), 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 09:28:10,728 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 329.0) internal successors, (3619), 11 states have internal predecessors, (3619), 0 states have call successors, (0), 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 09:28:10,728 INFO L175 Difference]: Start difference. First operand has 353 places, 414 transitions, 2167 flow. Second operand 10 states and 2649 transitions. [2022-11-20 09:28:10,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 536 transitions, 3543 flow [2022-11-20 09:28:10,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 536 transitions, 3437 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-20 09:28:10,800 INFO L231 Difference]: Finished difference. Result has 354 places, 414 transitions, 2170 flow [2022-11-20 09:28:10,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2170, PETRI_PLACES=354, PETRI_TRANSITIONS=414} [2022-11-20 09:28:10,801 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 118 predicate places. [2022-11-20 09:28:10,801 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 414 transitions, 2170 flow [2022-11-20 09:28:10,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 260.14285714285717) internal successors, (1821), 7 states have internal predecessors, (1821), 0 states have call successors, (0), 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 09:28:10,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:10,803 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:28:10,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 09:28:10,803 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:28:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1981518659, now seen corresponding path program 1 times [2022-11-20 09:28:10,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:10,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625892161] [2022-11-20 09:28:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:10,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 09:28:11,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:11,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625892161] [2022-11-20 09:28:11,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625892161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:11,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:11,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:28:11,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160262125] [2022-11-20 09:28:11,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:11,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:28:11,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:28:11,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:11,026 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 329 [2022-11-20 09:28:11,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 414 transitions, 2170 flow. Second operand has 7 states, 7 states have (on average 260.57142857142856) internal successors, (1824), 7 states have internal predecessors, (1824), 0 states have call successors, (0), 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 09:28:11,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:11,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 329 [2022-11-20 09:28:11,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:18,377 INFO L130 PetriNetUnfolder]: 7499/32031 cut-off events. [2022-11-20 09:28:18,377 INFO L131 PetriNetUnfolder]: For 11688/11688 co-relation queries the response was YES. [2022-11-20 09:28:18,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54861 conditions, 32031 events. 7499/32031 cut-off events. For 11688/11688 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 393667 event pairs, 2693 based on Foata normal form. 21/28836 useless extension candidates. Maximal degree in co-relation 50817. Up to 5452 conditions per place. [2022-11-20 09:28:18,992 INFO L137 encePairwiseOnDemand]: 319/329 looper letters, 196 selfloop transitions, 10 changer transitions 0/433 dead transitions. [2022-11-20 09:28:18,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 433 transitions, 2636 flow [2022-11-20 09:28:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 09:28:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2117 transitions. [2022-11-20 09:28:18,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8043313069908815 [2022-11-20 09:28:18,998 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2117 transitions. [2022-11-20 09:28:18,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2117 transitions. [2022-11-20 09:28:18,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:18,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2117 transitions. [2022-11-20 09:28:19,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 264.625) internal successors, (2117), 8 states have internal predecessors, (2117), 0 states have call successors, (0), 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 09:28:19,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 329.0) internal successors, (2961), 9 states have internal predecessors, (2961), 0 states have call successors, (0), 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 09:28:19,008 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 329.0) internal successors, (2961), 9 states have internal predecessors, (2961), 0 states have call successors, (0), 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 09:28:19,008 INFO L175 Difference]: Start difference. First operand has 354 places, 414 transitions, 2170 flow. Second operand 8 states and 2117 transitions. [2022-11-20 09:28:19,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 433 transitions, 2636 flow [2022-11-20 09:28:19,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 433 transitions, 2574 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-20 09:28:19,183 INFO L231 Difference]: Finished difference. Result has 353 places, 414 transitions, 2131 flow [2022-11-20 09:28:19,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2131, PETRI_PLACES=353, PETRI_TRANSITIONS=414} [2022-11-20 09:28:19,185 INFO L288 CegarLoopForPetriNet]: 236 programPoint places, 117 predicate places. [2022-11-20 09:28:19,186 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 414 transitions, 2131 flow [2022-11-20 09:28:19,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 260.57142857142856) internal successors, (1824), 7 states have internal predecessors, (1824), 0 states have call successors, (0), 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 09:28:19,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:19,187 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:28:19,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 09:28:19,187 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 09:28:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:19,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1519458832, now seen corresponding path program 1 times [2022-11-20 09:28:19,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622144676] [2022-11-20 09:28:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:19,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:19,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:19,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622144676] [2022-11-20 09:28:19,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622144676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151790658] [2022-11-20 09:28:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:19,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:19,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:19,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:19,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fadef0fe-1b28-4ed1-a98f-fafc9d419845/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:28:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:19,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 09:28:19,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:20,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:20,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151790658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:20,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:20,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-20 09:28:20,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646279067] [2022-11-20 09:28:20,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:20,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:28:20,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:20,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:28:20,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:28:20,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 329 [2022-11-20 09:28:20,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 414 transitions, 2131 flow. Second operand has 28 states, 28 states have (on average 235.10714285714286) internal successors, (6583), 28 states have internal predecessors, (6583), 0 states have call successors, (0), 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 09:28:20,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:20,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 329 [2022-11-20 09:28:20,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand