./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/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_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/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_29bbc682-dccf-410d-bafc-a9de0057c5e9/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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- 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 11:39:23,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:39:23,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:39:23,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:39:23,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:39:23,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:39:23,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:39:23,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:39:23,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:39:23,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:39:23,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:39:23,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:39:23,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:39:23,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:39:23,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:39:23,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:39:23,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:39:23,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:39:23,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:39:23,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:39:23,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:39:23,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:39:23,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:39:23,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:39:23,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:39:23,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:39:23,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:39:23,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:39:23,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:39:23,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:39:23,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:39:23,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:39:23,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:39:23,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:39:23,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:39:23,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:39:23,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:39:23,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:39:23,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:39:23,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:39:23,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:39:23,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 11:39:23,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:39:23,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:39:23,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:39:23,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:39:23,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:39:23,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:39:23,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:39:23,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:39:23,674 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:39:23,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:39:23,674 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:39:23,674 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:39:23,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:39:23,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:39:23,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:39:23,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:39:23,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:39:23,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:39:23,676 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 11:39:23,676 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:39:23,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:39:23,676 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:39:23,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:39:23,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:39:23,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:39:23,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:39:23,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:39:23,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:39:23,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:39:23,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:39:23,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:39:23,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:39:23,680 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:39:23,680 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:39:23,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:39:23,681 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_29bbc682-dccf-410d-bafc-a9de0057c5e9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-11-20 11:39:23,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:39:23,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:39:23,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:39:23,954 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:39:23,955 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:39:23,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-20 11:39:27,076 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:39:27,251 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:39:27,252 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-20 11:39:27,258 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/data/ba85047b0/50c4763336df470285752ca3b04429fe/FLAGcff059fa0 [2022-11-20 11:39:27,272 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/data/ba85047b0/50c4763336df470285752ca3b04429fe [2022-11-20 11:39:27,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:39:27,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:39:27,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:39:27,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:39:27,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:39:27,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5935ba7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27, skipping insertion in model container [2022-11-20 11:39:27,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:39:27,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:39:27,495 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_29bbc682-dccf-410d-bafc-a9de0057c5e9/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-20 11:39:27,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:39:27,506 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:39:27,525 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_29bbc682-dccf-410d-bafc-a9de0057c5e9/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-20 11:39:27,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:39:27,541 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:39:27,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27 WrapperNode [2022-11-20 11:39:27,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:39:27,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:39:27,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:39:27,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:39:27,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,580 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 82 [2022-11-20 11:39:27,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:39:27,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:39:27,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:39:27,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:39:27,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:39:27,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:39:27,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:39:27,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:39:27,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (1/1) ... [2022-11-20 11:39:27,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:39:27,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:27,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:39:27,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:39:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:39:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:39:27,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:39:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:39:27,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:39:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:39:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:39:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:39:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:39:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:39:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:39:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:39:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:39:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:39:27,695 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 11:39:27,800 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:39:27,803 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:39:28,204 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:39:28,280 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:39:28,280 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 11:39:28,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:39:28 BoogieIcfgContainer [2022-11-20 11:39:28,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:39:28,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:39:28,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:39:28,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:39:28,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:39:27" (1/3) ... [2022-11-20 11:39:28,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e87bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:39:28, skipping insertion in model container [2022-11-20 11:39:28,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27" (2/3) ... [2022-11-20 11:39:28,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e87bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:39:28, skipping insertion in model container [2022-11-20 11:39:28,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:39:28" (3/3) ... [2022-11-20 11:39:28,293 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-11-20 11:39:28,306 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:39:28,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:39:28,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-20 11:39:28,318 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:39:28,436 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:39:28,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 104 transitions, 224 flow [2022-11-20 11:39:28,527 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2022-11-20 11:39:28,528 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:39:28,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 6/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-20 11:39:28,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 104 transitions, 224 flow [2022-11-20 11:39:28,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 84 transitions, 180 flow [2022-11-20 11:39:28,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:39:28,559 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;@4291caa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:39:28,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-20 11:39:28,579 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2022-11-20 11:39:28,579 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:39:28,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:28,580 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] [2022-11-20 11:39:28,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2094336087, now seen corresponding path program 1 times [2022-11-20 11:39:28,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:28,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691224159] [2022-11-20 11:39:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:28,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:28,992 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 11:39:28,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:28,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691224159] [2022-11-20 11:39:28,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691224159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:28,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:28,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585135303] [2022-11-20 11:39:28,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:29,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:29,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:29,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:29,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:29,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-20 11:39:29,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:39:29,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:29,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-20 11:39:29,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:29,211 INFO L130 PetriNetUnfolder]: 22/171 cut-off events. [2022-11-20 11:39:29,212 INFO L131 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-11-20 11:39:29,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 171 events. 22/171 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 499 event pairs, 6 based on Foata normal form. 18/146 useless extension candidates. Maximal degree in co-relation 141. Up to 39 conditions per place. [2022-11-20 11:39:29,220 INFO L137 encePairwiseOnDemand]: 94/104 looper letters, 12 selfloop transitions, 2 changer transitions 1/84 dead transitions. [2022-11-20 11:39:29,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 217 flow [2022-11-20 11:39:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:39:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2022-11-20 11:39:29,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2022-11-20 11:39:29,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2022-11-20 11:39:29,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2022-11-20 11:39:29,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:29,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2022-11-20 11:39:29,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:29,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 11:39:29,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 11:39:29,270 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 180 flow. Second operand 3 states and 286 transitions. [2022-11-20 11:39:29,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 217 flow [2022-11-20 11:39:29,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 203 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:39:29,277 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 180 flow [2022-11-20 11:39:29,279 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2022-11-20 11:39:29,283 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, -2 predicate places. [2022-11-20 11:39:29,284 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 180 flow [2022-11-20 11:39:29,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:39:29,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:29,284 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] [2022-11-20 11:39:29,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:39:29,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1682671302, now seen corresponding path program 1 times [2022-11-20 11:39:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:29,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952894023] [2022-11-20 11:39:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:29,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:29,429 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 11:39:29,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:29,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952894023] [2022-11-20 11:39:29,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952894023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:29,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:29,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:29,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857499981] [2022-11-20 11:39:29,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:29,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:39:29,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:39:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:39:29,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-20 11:39:29,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 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 11:39:29,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:29,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-20 11:39:29,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:29,582 INFO L130 PetriNetUnfolder]: 95/261 cut-off events. [2022-11-20 11:39:29,582 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-20 11:39:29,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 261 events. 95/261 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1091 event pairs, 12 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 372. Up to 124 conditions per place. [2022-11-20 11:39:29,586 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 34 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2022-11-20 11:39:29,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 98 transitions, 309 flow [2022-11-20 11:39:29,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:39:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:39:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 435 transitions. [2022-11-20 11:39:29,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8365384615384616 [2022-11-20 11:39:29,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 435 transitions. [2022-11-20 11:39:29,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 435 transitions. [2022-11-20 11:39:29,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:29,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 435 transitions. [2022-11-20 11:39:29,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 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 11:39:29,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:29,594 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:29,594 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 180 flow. Second operand 5 states and 435 transitions. [2022-11-20 11:39:29,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 98 transitions, 309 flow [2022-11-20 11:39:29,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 98 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:29,598 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 208 flow [2022-11-20 11:39:29,598 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2022-11-20 11:39:29,599 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 3 predicate places. [2022-11-20 11:39:29,599 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 208 flow [2022-11-20 11:39:29,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 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 11:39:29,600 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:29,600 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:29,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:39:29,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2079090651, now seen corresponding path program 1 times [2022-11-20 11:39:29,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:29,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67192186] [2022-11-20 11:39:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:29,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:29,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67192186] [2022-11-20 11:39:29,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67192186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95315370] [2022-11-20 11:39:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:29,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:29,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:29,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:29,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:39:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:29,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:39:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:29,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:30,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95315370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:30,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:30,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 11:39:30,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211920585] [2022-11-20 11:39:30,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:30,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:30,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:30,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:30,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:30,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-20 11:39:30,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 11:39:30,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:30,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-20 11:39:30,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:30,246 INFO L130 PetriNetUnfolder]: 46/340 cut-off events. [2022-11-20 11:39:30,246 INFO L131 PetriNetUnfolder]: For 54/58 co-relation queries the response was YES. [2022-11-20 11:39:30,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 340 events. 46/340 cut-off events. For 54/58 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1544 event pairs, 3 based on Foata normal form. 5/286 useless extension candidates. Maximal degree in co-relation 467. Up to 59 conditions per place. [2022-11-20 11:39:30,269 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 22 selfloop transitions, 12 changer transitions 0/106 dead transitions. [2022-11-20 11:39:30,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 355 flow [2022-11-20 11:39:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:39:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 654 transitions. [2022-11-20 11:39:30,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8983516483516484 [2022-11-20 11:39:30,274 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 654 transitions. [2022-11-20 11:39:30,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 654 transitions. [2022-11-20 11:39:30,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:30,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 654 transitions. [2022-11-20 11:39:30,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.42857142857143) internal successors, (654), 7 states have internal predecessors, (654), 0 states have call successors, (0), 0 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 11:39:30,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 11:39:30,284 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 11:39:30,284 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 208 flow. Second operand 7 states and 654 transitions. [2022-11-20 11:39:30,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 355 flow [2022-11-20 11:39:30,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 106 transitions, 353 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:30,293 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 315 flow [2022-11-20 11:39:30,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2022-11-20 11:39:30,296 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 13 predicate places. [2022-11-20 11:39:30,296 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 315 flow [2022-11-20 11:39:30,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 11:39:30,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:30,298 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:30,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:30,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:30,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:30,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2079090650, now seen corresponding path program 1 times [2022-11-20 11:39:30,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:30,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286077122] [2022-11-20 11:39:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:30,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:30,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286077122] [2022-11-20 11:39:30,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286077122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:30,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413737876] [2022-11-20 11:39:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:30,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:30,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:30,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:39:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:30,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:39:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:30,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:30,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413737876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:30,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:30,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-20 11:39:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536011803] [2022-11-20 11:39:30,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:30,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:39:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:39:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:39:30,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-20 11:39:30,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 11:39:30,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:30,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-20 11:39:30,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:31,028 INFO L130 PetriNetUnfolder]: 44/378 cut-off events. [2022-11-20 11:39:31,029 INFO L131 PetriNetUnfolder]: For 601/663 co-relation queries the response was YES. [2022-11-20 11:39:31,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 378 events. 44/378 cut-off events. For 601/663 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1747 event pairs, 2 based on Foata normal form. 20/358 useless extension candidates. Maximal degree in co-relation 439. Up to 57 conditions per place. [2022-11-20 11:39:31,035 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 14 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2022-11-20 11:39:31,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 96 transitions, 393 flow [2022-11-20 11:39:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:39:31,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:39:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2022-11-20 11:39:31,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8798076923076923 [2022-11-20 11:39:31,037 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2022-11-20 11:39:31,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2022-11-20 11:39:31,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:31,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2022-11-20 11:39:31,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 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 11:39:31,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 11:39:31,041 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 11:39:31,041 INFO L175 Difference]: Start difference. First operand has 99 places, 92 transitions, 315 flow. Second operand 4 states and 366 transitions. [2022-11-20 11:39:31,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 96 transitions, 393 flow [2022-11-20 11:39:31,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 377 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:31,052 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 369 flow [2022-11-20 11:39:31,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=369, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2022-11-20 11:39:31,054 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 15 predicate places. [2022-11-20 11:39:31,055 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 369 flow [2022-11-20 11:39:31,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 11:39:31,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:31,056 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:39:31,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:31,262 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash -846312056, now seen corresponding path program 1 times [2022-11-20 11:39:31,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:31,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822043520] [2022-11-20 11:39:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:31,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:31,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822043520] [2022-11-20 11:39:31,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822043520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212242637] [2022-11-20 11:39:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:31,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:31,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:31,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:31,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:39:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:39:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:31,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:31,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212242637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:31,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:31,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 11:39:31,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346815680] [2022-11-20 11:39:31,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:31,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:39:31,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:39:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:39:31,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-20 11:39:31,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 369 flow. Second operand has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 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 11:39:31,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:31,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-20 11:39:31,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:32,099 INFO L130 PetriNetUnfolder]: 304/1142 cut-off events. [2022-11-20 11:39:32,100 INFO L131 PetriNetUnfolder]: For 4352/4391 co-relation queries the response was YES. [2022-11-20 11:39:32,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3449 conditions, 1142 events. 304/1142 cut-off events. For 4352/4391 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 7230 event pairs, 13 based on Foata normal form. 36/1040 useless extension candidates. Maximal degree in co-relation 2715. Up to 230 conditions per place. [2022-11-20 11:39:32,115 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 138 selfloop transitions, 18 changer transitions 0/216 dead transitions. [2022-11-20 11:39:32,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 216 transitions, 1670 flow [2022-11-20 11:39:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:39:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:39:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1522 transitions. [2022-11-20 11:39:32,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.813034188034188 [2022-11-20 11:39:32,122 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1522 transitions. [2022-11-20 11:39:32,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1522 transitions. [2022-11-20 11:39:32,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:32,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1522 transitions. [2022-11-20 11:39:32,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.55555555555556) internal successors, (1522), 18 states have internal predecessors, (1522), 0 states have call successors, (0), 0 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 11:39:32,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 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 11:39:32,174 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 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 11:39:32,174 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 369 flow. Second operand 18 states and 1522 transitions. [2022-11-20 11:39:32,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 216 transitions, 1670 flow [2022-11-20 11:39:32,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 216 transitions, 1493 flow, removed 88 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:32,185 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 446 flow [2022-11-20 11:39:32,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=446, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2022-11-20 11:39:32,187 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 35 predicate places. [2022-11-20 11:39:32,187 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 446 flow [2022-11-20 11:39:32,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 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 11:39:32,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:32,188 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:39:32,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:39:32,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:32,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:32,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:32,394 INFO L85 PathProgramCache]: Analyzing trace with hash -465869645, now seen corresponding path program 1 times [2022-11-20 11:39:32,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:32,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660012990] [2022-11-20 11:39:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:32,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:32,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660012990] [2022-11-20 11:39:32,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660012990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831667491] [2022-11-20 11:39:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:32,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:32,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:32,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:32,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:39:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:32,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:39:32,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:32,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:32,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831667491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:32,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:32,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:39:32,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607031468] [2022-11-20 11:39:32,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:32,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:39:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:39:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:32,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-20 11:39:32,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 446 flow. Second operand has 6 states, 6 states have (on average 81.33333333333333) internal successors, (488), 6 states have internal predecessors, (488), 0 states have call successors, (0), 0 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 11:39:32,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:32,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-20 11:39:32,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:32,935 INFO L130 PetriNetUnfolder]: 272/1051 cut-off events. [2022-11-20 11:39:32,935 INFO L131 PetriNetUnfolder]: For 2561/2634 co-relation queries the response was YES. [2022-11-20 11:39:32,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 1051 events. 272/1051 cut-off events. For 2561/2634 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6864 event pairs, 37 based on Foata normal form. 52/946 useless extension candidates. Maximal degree in co-relation 2281. Up to 273 conditions per place. [2022-11-20 11:39:32,945 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 50 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2022-11-20 11:39:32,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 121 transitions, 662 flow [2022-11-20 11:39:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:39:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 591 transitions. [2022-11-20 11:39:32,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8118131868131868 [2022-11-20 11:39:32,948 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 591 transitions. [2022-11-20 11:39:32,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 591 transitions. [2022-11-20 11:39:32,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:32,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 591 transitions. [2022-11-20 11:39:32,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.42857142857143) internal successors, (591), 7 states have internal predecessors, (591), 0 states have call successors, (0), 0 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 11:39:32,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 11:39:32,952 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 11:39:32,952 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 446 flow. Second operand 7 states and 591 transitions. [2022-11-20 11:39:32,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 121 transitions, 662 flow [2022-11-20 11:39:32,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 630 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 11:39:32,963 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 409 flow [2022-11-20 11:39:32,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2022-11-20 11:39:32,966 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 31 predicate places. [2022-11-20 11:39:32,966 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 409 flow [2022-11-20 11:39:32,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.33333333333333) internal successors, (488), 6 states have internal predecessors, (488), 0 states have call successors, (0), 0 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 11:39:32,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:32,967 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] [2022-11-20 11:39:32,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:33,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:33,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash -650724744, now seen corresponding path program 1 times [2022-11-20 11:39:33,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:33,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866499540] [2022-11-20 11:39:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:33,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:33,282 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 11:39:33,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:33,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866499540] [2022-11-20 11:39:33,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866499540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:33,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:33,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:33,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760976207] [2022-11-20 11:39:33,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:33,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:39:33,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:33,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:39:33,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:39:33,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-20 11:39:33,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 409 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 11:39:33,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:33,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-20 11:39:33,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:33,623 INFO L130 PetriNetUnfolder]: 457/1568 cut-off events. [2022-11-20 11:39:33,624 INFO L131 PetriNetUnfolder]: For 2942/3120 co-relation queries the response was YES. [2022-11-20 11:39:33,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3969 conditions, 1568 events. 457/1568 cut-off events. For 2942/3120 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13259 event pairs, 193 based on Foata normal form. 28/1221 useless extension candidates. Maximal degree in co-relation 3660. Up to 732 conditions per place. [2022-11-20 11:39:33,636 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 69 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2022-11-20 11:39:33,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 144 transitions, 876 flow [2022-11-20 11:39:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:39:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:39:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 434 transitions. [2022-11-20 11:39:33,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8346153846153846 [2022-11-20 11:39:33,639 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 434 transitions. [2022-11-20 11:39:33,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 434 transitions. [2022-11-20 11:39:33,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:33,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 434 transitions. [2022-11-20 11:39:33,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 11:39:33,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:33,643 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:33,643 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 409 flow. Second operand 5 states and 434 transitions. [2022-11-20 11:39:33,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 144 transitions, 876 flow [2022-11-20 11:39:33,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 862 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:39:33,652 INFO L231 Difference]: Finished difference. Result has 119 places, 104 transitions, 425 flow [2022-11-20 11:39:33,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=119, PETRI_TRANSITIONS=104} [2022-11-20 11:39:33,653 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 33 predicate places. [2022-11-20 11:39:33,653 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 104 transitions, 425 flow [2022-11-20 11:39:33,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 11:39:33,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:33,654 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] [2022-11-20 11:39:33,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:39:33,654 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash 208290301, now seen corresponding path program 1 times [2022-11-20 11:39:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:33,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159390223] [2022-11-20 11:39:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:33,853 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 11:39:33,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:33,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159390223] [2022-11-20 11:39:33,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159390223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:33,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:33,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:39:33,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23913246] [2022-11-20 11:39:33,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:33,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:33,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-11-20 11:39:33,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 104 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:33,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:33,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-11-20 11:39:33,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:34,322 INFO L130 PetriNetUnfolder]: 483/2003 cut-off events. [2022-11-20 11:39:34,322 INFO L131 PetriNetUnfolder]: For 2241/2241 co-relation queries the response was YES. [2022-11-20 11:39:34,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4867 conditions, 2003 events. 483/2003 cut-off events. For 2241/2241 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 16310 event pairs, 339 based on Foata normal form. 0/1714 useless extension candidates. Maximal degree in co-relation 3856. Up to 999 conditions per place. [2022-11-20 11:39:34,337 INFO L137 encePairwiseOnDemand]: 96/104 looper letters, 51 selfloop transitions, 7 changer transitions 1/117 dead transitions. [2022-11-20 11:39:34,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 581 flow [2022-11-20 11:39:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:39:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:39:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 555 transitions. [2022-11-20 11:39:34,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6670673076923077 [2022-11-20 11:39:34,340 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 555 transitions. [2022-11-20 11:39:34,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 555 transitions. [2022-11-20 11:39:34,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:34,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 555 transitions. [2022-11-20 11:39:34,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 11:39:34,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 11:39:34,344 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 11:39:34,345 INFO L175 Difference]: Start difference. First operand has 119 places, 104 transitions, 425 flow. Second operand 8 states and 555 transitions. [2022-11-20 11:39:34,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 581 flow [2022-11-20 11:39:34,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 117 transitions, 579 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:34,355 INFO L231 Difference]: Finished difference. Result has 128 places, 106 transitions, 455 flow [2022-11-20 11:39:34,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=455, PETRI_PLACES=128, PETRI_TRANSITIONS=106} [2022-11-20 11:39:34,356 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 42 predicate places. [2022-11-20 11:39:34,357 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 106 transitions, 455 flow [2022-11-20 11:39:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:34,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:34,357 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] [2022-11-20 11:39:34,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:39:34,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash 283275449, now seen corresponding path program 1 times [2022-11-20 11:39:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:34,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447946615] [2022-11-20 11:39:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:34,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447946615] [2022-11-20 11:39:34,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447946615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:34,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:34,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:39:34,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402810575] [2022-11-20 11:39:34,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:34,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:39:34,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:34,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:39:34,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:39:34,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-11-20 11:39:34,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 106 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 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 11:39:34,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:34,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-11-20 11:39:34,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:34,916 INFO L130 PetriNetUnfolder]: 503/2050 cut-off events. [2022-11-20 11:39:34,916 INFO L131 PetriNetUnfolder]: For 2330/2359 co-relation queries the response was YES. [2022-11-20 11:39:34,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5068 conditions, 2050 events. 503/2050 cut-off events. For 2330/2359 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 17374 event pairs, 283 based on Foata normal form. 12/1899 useless extension candidates. Maximal degree in co-relation 4924. Up to 820 conditions per place. [2022-11-20 11:39:34,932 INFO L137 encePairwiseOnDemand]: 94/104 looper letters, 61 selfloop transitions, 9 changer transitions 4/138 dead transitions. [2022-11-20 11:39:34,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 138 transitions, 822 flow [2022-11-20 11:39:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:39:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:39:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 598 transitions. [2022-11-20 11:39:34,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.71875 [2022-11-20 11:39:34,935 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 598 transitions. [2022-11-20 11:39:34,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 598 transitions. [2022-11-20 11:39:34,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:34,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 598 transitions. [2022-11-20 11:39:34,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.75) internal successors, (598), 8 states have internal predecessors, (598), 0 states have call successors, (0), 0 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 11:39:34,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 11:39:34,940 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 11:39:34,940 INFO L175 Difference]: Start difference. First operand has 128 places, 106 transitions, 455 flow. Second operand 8 states and 598 transitions. [2022-11-20 11:39:34,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 138 transitions, 822 flow [2022-11-20 11:39:34,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 138 transitions, 813 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:39:34,952 INFO L231 Difference]: Finished difference. Result has 134 places, 106 transitions, 476 flow [2022-11-20 11:39:34,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=134, PETRI_TRANSITIONS=106} [2022-11-20 11:39:34,953 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2022-11-20 11:39:34,953 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 106 transitions, 476 flow [2022-11-20 11:39:34,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 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 11:39:34,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:34,954 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] [2022-11-20 11:39:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:39:34,954 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash -540023610, now seen corresponding path program 1 times [2022-11-20 11:39:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:34,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43351669] [2022-11-20 11:39:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:39:35,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43351669] [2022-11-20 11:39:35,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43351669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389669598] [2022-11-20 11:39:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:35,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:35,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:35,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:35,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:39:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:39:35,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:39:35,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:39:35,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389669598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:35,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:35,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 11:39:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907577441] [2022-11-20 11:39:35,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:39:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:39:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:39:35,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-20 11:39:35,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 106 transitions, 476 flow. Second operand has 12 states, 12 states have (on average 81.83333333333333) internal successors, (982), 12 states have internal predecessors, (982), 0 states have call successors, (0), 0 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 11:39:35,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:35,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-20 11:39:35,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:36,137 INFO L130 PetriNetUnfolder]: 989/3131 cut-off events. [2022-11-20 11:39:36,138 INFO L131 PetriNetUnfolder]: For 6463/6586 co-relation queries the response was YES. [2022-11-20 11:39:36,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9172 conditions, 3131 events. 989/3131 cut-off events. For 6463/6586 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 29071 event pairs, 83 based on Foata normal form. 102/3032 useless extension candidates. Maximal degree in co-relation 8980. Up to 442 conditions per place. [2022-11-20 11:39:36,167 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 229 selfloop transitions, 18 changer transitions 0/319 dead transitions. [2022-11-20 11:39:36,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 319 transitions, 2638 flow [2022-11-20 11:39:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:39:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:39:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1533 transitions. [2022-11-20 11:39:36,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8189102564102564 [2022-11-20 11:39:36,172 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1533 transitions. [2022-11-20 11:39:36,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1533 transitions. [2022-11-20 11:39:36,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:36,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1533 transitions. [2022-11-20 11:39:36,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.16666666666667) internal successors, (1533), 18 states have internal predecessors, (1533), 0 states have call successors, (0), 0 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 11:39:36,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 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 11:39:36,183 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 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 11:39:36,183 INFO L175 Difference]: Start difference. First operand has 134 places, 106 transitions, 476 flow. Second operand 18 states and 1533 transitions. [2022-11-20 11:39:36,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 319 transitions, 2638 flow [2022-11-20 11:39:36,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 319 transitions, 2620 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-20 11:39:36,203 INFO L231 Difference]: Finished difference. Result has 147 places, 118 transitions, 564 flow [2022-11-20 11:39:36,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=564, PETRI_PLACES=147, PETRI_TRANSITIONS=118} [2022-11-20 11:39:36,204 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2022-11-20 11:39:36,205 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 118 transitions, 564 flow [2022-11-20 11:39:36,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.83333333333333) internal successors, (982), 12 states have internal predecessors, (982), 0 states have call successors, (0), 0 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 11:39:36,205 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:36,206 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] [2022-11-20 11:39:36,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:36,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:39:36,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash -765719959, now seen corresponding path program 1 times [2022-11-20 11:39:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:36,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373913200] [2022-11-20 11:39:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:39:36,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373913200] [2022-11-20 11:39:36,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373913200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579301818] [2022-11-20 11:39:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:36,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:36,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:36,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:36,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:39:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:39:36,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:39:36,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579301818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:36,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:36,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:39:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946681324] [2022-11-20 11:39:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:36,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:39:36,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:39:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:36,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-20 11:39:36,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 118 transitions, 564 flow. Second operand has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 11:39:36,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:36,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-20 11:39:36,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:37,413 INFO L130 PetriNetUnfolder]: 903/2849 cut-off events. [2022-11-20 11:39:37,413 INFO L131 PetriNetUnfolder]: For 6750/6873 co-relation queries the response was YES. [2022-11-20 11:39:37,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8936 conditions, 2849 events. 903/2849 cut-off events. For 6750/6873 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 26472 event pairs, 134 based on Foata normal form. 128/2706 useless extension candidates. Maximal degree in co-relation 8665. Up to 844 conditions per place. [2022-11-20 11:39:37,439 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 86 selfloop transitions, 11 changer transitions 0/169 dead transitions. [2022-11-20 11:39:37,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 169 transitions, 1168 flow [2022-11-20 11:39:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:39:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 596 transitions. [2022-11-20 11:39:37,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8186813186813187 [2022-11-20 11:39:37,442 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 596 transitions. [2022-11-20 11:39:37,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 596 transitions. [2022-11-20 11:39:37,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:37,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 596 transitions. [2022-11-20 11:39:37,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:37,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 11:39:37,447 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 11:39:37,447 INFO L175 Difference]: Start difference. First operand has 147 places, 118 transitions, 564 flow. Second operand 7 states and 596 transitions. [2022-11-20 11:39:37,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 169 transitions, 1168 flow [2022-11-20 11:39:37,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 169 transitions, 1136 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 11:39:37,464 INFO L231 Difference]: Finished difference. Result has 143 places, 114 transitions, 527 flow [2022-11-20 11:39:37,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=143, PETRI_TRANSITIONS=114} [2022-11-20 11:39:37,465 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 57 predicate places. [2022-11-20 11:39:37,465 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 114 transitions, 527 flow [2022-11-20 11:39:37,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 11:39:37,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:37,466 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] [2022-11-20 11:39:37,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:37,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:39:37,674 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:37,674 INFO L85 PathProgramCache]: Analyzing trace with hash 106812249, now seen corresponding path program 1 times [2022-11-20 11:39:37,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:37,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651688993] [2022-11-20 11:39:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:37,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:37,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651688993] [2022-11-20 11:39:37,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651688993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070462723] [2022-11-20 11:39:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:37,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:37,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:37,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:39:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:39:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:38,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:38,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070462723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:38,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:38,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2022-11-20 11:39:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104508171] [2022-11-20 11:39:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:38,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:39:38,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-11-20 11:39:38,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 114 transitions, 527 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:38,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:38,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-11-20 11:39:38,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:39,185 INFO L130 PetriNetUnfolder]: 653/3088 cut-off events. [2022-11-20 11:39:39,186 INFO L131 PetriNetUnfolder]: For 4186/4227 co-relation queries the response was YES. [2022-11-20 11:39:39,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8178 conditions, 3088 events. 653/3088 cut-off events. For 4186/4227 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 28483 event pairs, 442 based on Foata normal form. 84/3098 useless extension candidates. Maximal degree in co-relation 7761. Up to 1415 conditions per place. [2022-11-20 11:39:39,222 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 32 selfloop transitions, 6 changer transitions 0/112 dead transitions. [2022-11-20 11:39:39,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 112 transitions, 595 flow [2022-11-20 11:39:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:39:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2022-11-20 11:39:39,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510989010989011 [2022-11-20 11:39:39,225 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2022-11-20 11:39:39,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2022-11-20 11:39:39,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:39,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2022-11-20 11:39:39,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.71428571428571) internal successors, (474), 7 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:39,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 11:39:39,231 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 11:39:39,231 INFO L175 Difference]: Start difference. First operand has 143 places, 114 transitions, 527 flow. Second operand 7 states and 474 transitions. [2022-11-20 11:39:39,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 112 transitions, 595 flow [2022-11-20 11:39:39,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 112 transitions, 571 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-20 11:39:39,259 INFO L231 Difference]: Finished difference. Result has 141 places, 112 transitions, 507 flow [2022-11-20 11:39:39,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=507, PETRI_PLACES=141, PETRI_TRANSITIONS=112} [2022-11-20 11:39:39,261 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 55 predicate places. [2022-11-20 11:39:39,262 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 112 transitions, 507 flow [2022-11-20 11:39:39,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:39,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:39,263 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 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] [2022-11-20 11:39:39,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:39:39,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:39:39,468 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1168305961, now seen corresponding path program 2 times [2022-11-20 11:39:39,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:39,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614462119] [2022-11-20 11:39:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:39,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:39,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:39,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614462119] [2022-11-20 11:39:39,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614462119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:39,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964545958] [2022-11-20 11:39:39,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:39:39,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:39,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:39,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:39,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:39:39,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:39:39,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:39,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:39:39,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:39,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:39,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964545958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:39,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:39,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 11:39:39,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388630662] [2022-11-20 11:39:39,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:39,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:39:39,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:39:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:39:39,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-20 11:39:39,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 112 transitions, 507 flow. Second operand has 13 states, 13 states have (on average 88.3076923076923) internal successors, (1148), 13 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 11:39:39,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:39,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-20 11:39:39,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:40,756 INFO L130 PetriNetUnfolder]: 293/2877 cut-off events. [2022-11-20 11:39:40,757 INFO L131 PetriNetUnfolder]: For 5872/5937 co-relation queries the response was YES. [2022-11-20 11:39:40,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6860 conditions, 2877 events. 293/2877 cut-off events. For 5872/5937 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 27060 event pairs, 20 based on Foata normal form. 260/3123 useless extension candidates. Maximal degree in co-relation 6798. Up to 230 conditions per place. [2022-11-20 11:39:40,780 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 44 selfloop transitions, 46 changer transitions 0/181 dead transitions. [2022-11-20 11:39:40,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 181 transitions, 1111 flow [2022-11-20 11:39:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:39:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 11:39:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2022-11-20 11:39:40,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8998397435897436 [2022-11-20 11:39:40,785 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2022-11-20 11:39:40,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2022-11-20 11:39:40,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:40,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2022-11-20 11:39:40,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 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 11:39:40,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 11:39:40,796 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 11:39:40,796 INFO L175 Difference]: Start difference. First operand has 141 places, 112 transitions, 507 flow. Second operand 12 states and 1123 transitions. [2022-11-20 11:39:40,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 181 transitions, 1111 flow [2022-11-20 11:39:40,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 181 transitions, 1100 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:39:40,822 INFO L231 Difference]: Finished difference. Result has 157 places, 151 transitions, 1092 flow [2022-11-20 11:39:40,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1092, PETRI_PLACES=157, PETRI_TRANSITIONS=151} [2022-11-20 11:39:40,823 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 71 predicate places. [2022-11-20 11:39:40,823 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 151 transitions, 1092 flow [2022-11-20 11:39:40,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.3076923076923) internal successors, (1148), 13 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 11:39:40,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:40,825 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:39:40,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:41,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:41,030 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1755553350, now seen corresponding path program 2 times [2022-11-20 11:39:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:41,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667247579] [2022-11-20 11:39:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:41,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667247579] [2022-11-20 11:39:41,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667247579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:41,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740021535] [2022-11-20 11:39:41,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:39:41,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:41,229 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:41,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:39:41,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:39:41,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:41,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:39:41,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 11:39:41,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 11:39:41,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740021535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:41,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:41,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-20 11:39:41,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373932177] [2022-11-20 11:39:41,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:41,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:39:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:39:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:39:41,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-11-20 11:39:41,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 151 transitions, 1092 flow. Second operand has 16 states, 16 states have (on average 71.5625) internal successors, (1145), 16 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 11:39:41,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:41,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-11-20 11:39:41,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:43,354 INFO L130 PetriNetUnfolder]: 1246/4719 cut-off events. [2022-11-20 11:39:43,354 INFO L131 PetriNetUnfolder]: For 29908/29996 co-relation queries the response was YES. [2022-11-20 11:39:43,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17910 conditions, 4719 events. 1246/4719 cut-off events. For 29908/29996 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 44698 event pairs, 46 based on Foata normal form. 157/4775 useless extension candidates. Maximal degree in co-relation 17837. Up to 1050 conditions per place. [2022-11-20 11:39:43,420 INFO L137 encePairwiseOnDemand]: 95/104 looper letters, 332 selfloop transitions, 23 changer transitions 0/418 dead transitions. [2022-11-20 11:39:43,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 418 transitions, 4775 flow [2022-11-20 11:39:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:39:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 11:39:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1622 transitions. [2022-11-20 11:39:43,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.708916083916084 [2022-11-20 11:39:43,427 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1622 transitions. [2022-11-20 11:39:43,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1622 transitions. [2022-11-20 11:39:43,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:43,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1622 transitions. [2022-11-20 11:39:43,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 73.72727272727273) internal successors, (1622), 22 states have internal predecessors, (1622), 0 states have call successors, (0), 0 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 11:39:43,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 104.0) internal successors, (2392), 23 states have internal predecessors, (2392), 0 states have call successors, (0), 0 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 11:39:43,440 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 104.0) internal successors, (2392), 23 states have internal predecessors, (2392), 0 states have call successors, (0), 0 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 11:39:43,440 INFO L175 Difference]: Start difference. First operand has 157 places, 151 transitions, 1092 flow. Second operand 22 states and 1622 transitions. [2022-11-20 11:39:43,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 418 transitions, 4775 flow [2022-11-20 11:39:43,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 418 transitions, 4285 flow, removed 241 selfloop flow, removed 4 redundant places. [2022-11-20 11:39:43,507 INFO L231 Difference]: Finished difference. Result has 174 places, 155 transitions, 1049 flow [2022-11-20 11:39:43,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1049, PETRI_PLACES=174, PETRI_TRANSITIONS=155} [2022-11-20 11:39:43,509 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2022-11-20 11:39:43,509 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 155 transitions, 1049 flow [2022-11-20 11:39:43,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 71.5625) internal successors, (1145), 16 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 11:39:43,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:43,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:43,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:43,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:39:43,715 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:43,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash -769297139, now seen corresponding path program 1 times [2022-11-20 11:39:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:43,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263981237] [2022-11-20 11:39:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:43,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:43,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263981237] [2022-11-20 11:39:43,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263981237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:43,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479774486] [2022-11-20 11:39:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:43,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:43,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:43,998 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:44,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:39:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:39:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:44,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:44,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479774486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:44,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:44,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2022-11-20 11:39:44,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18778123] [2022-11-20 11:39:44,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:44,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:39:44,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:39:44,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:39:44,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 104 [2022-11-20 11:39:44,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 155 transitions, 1049 flow. Second operand has 17 states, 17 states have (on average 65.6470588235294) internal successors, (1116), 17 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 11:39:44,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:44,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 104 [2022-11-20 11:39:44,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:49,966 INFO L130 PetriNetUnfolder]: 8388/24318 cut-off events. [2022-11-20 11:39:49,967 INFO L131 PetriNetUnfolder]: For 58613/59146 co-relation queries the response was YES. [2022-11-20 11:39:50,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72771 conditions, 24318 events. 8388/24318 cut-off events. For 58613/59146 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 262572 event pairs, 3259 based on Foata normal form. 670/24884 useless extension candidates. Maximal degree in co-relation 72694. Up to 8724 conditions per place. [2022-11-20 11:39:50,230 INFO L137 encePairwiseOnDemand]: 91/104 looper letters, 446 selfloop transitions, 35 changer transitions 27/555 dead transitions. [2022-11-20 11:39:50,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 555 transitions, 5572 flow [2022-11-20 11:39:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:39:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-20 11:39:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1757 transitions. [2022-11-20 11:39:50,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6497781065088757 [2022-11-20 11:39:50,234 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1757 transitions. [2022-11-20 11:39:50,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1757 transitions. [2022-11-20 11:39:50,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:50,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1757 transitions. [2022-11-20 11:39:50,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 67.57692307692308) internal successors, (1757), 26 states have internal predecessors, (1757), 0 states have call successors, (0), 0 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 11:39:50,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 104.0) internal successors, (2808), 27 states have internal predecessors, (2808), 0 states have call successors, (0), 0 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 11:39:50,246 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 104.0) internal successors, (2808), 27 states have internal predecessors, (2808), 0 states have call successors, (0), 0 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 11:39:50,246 INFO L175 Difference]: Start difference. First operand has 174 places, 155 transitions, 1049 flow. Second operand 26 states and 1757 transitions. [2022-11-20 11:39:50,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 555 transitions, 5572 flow [2022-11-20 11:39:50,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 555 transitions, 5328 flow, removed 16 selfloop flow, removed 16 redundant places. [2022-11-20 11:39:50,461 INFO L231 Difference]: Finished difference. Result has 194 places, 181 transitions, 1288 flow [2022-11-20 11:39:50,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1288, PETRI_PLACES=194, PETRI_TRANSITIONS=181} [2022-11-20 11:39:50,463 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 108 predicate places. [2022-11-20 11:39:50,463 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 181 transitions, 1288 flow [2022-11-20 11:39:50,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.6470588235294) internal successors, (1116), 17 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 11:39:50,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:50,482 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-11-20 11:39:50,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:50,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:39:50,688 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash -579249570, now seen corresponding path program 2 times [2022-11-20 11:39:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:50,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360669513] [2022-11-20 11:39:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:50,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:39:51,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:51,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360669513] [2022-11-20 11:39:51,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360669513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:51,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996782321] [2022-11-20 11:39:51,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:39:51,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:51,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:51,078 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:51,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:39:51,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:39:51,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:51,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:39:51,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:39:51,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:39:51,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996782321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:51,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:51,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-20 11:39:51,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206687354] [2022-11-20 11:39:51,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:51,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:39:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:39:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:39:51,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-20 11:39:51,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 181 transitions, 1288 flow. Second operand has 24 states, 24 states have (on average 82.375) internal successors, (1977), 24 states have internal predecessors, (1977), 0 states have call successors, (0), 0 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 11:39:51,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:51,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-20 11:39:51,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:55,818 INFO L130 PetriNetUnfolder]: 5763/15899 cut-off events. [2022-11-20 11:39:55,818 INFO L131 PetriNetUnfolder]: For 75703/76875 co-relation queries the response was YES. [2022-11-20 11:39:55,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56516 conditions, 15899 events. 5763/15899 cut-off events. For 75703/76875 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 167171 event pairs, 278 based on Foata normal form. 577/15112 useless extension candidates. Maximal degree in co-relation 56433. Up to 2750 conditions per place. [2022-11-20 11:39:55,955 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 1226 selfloop transitions, 47 changer transitions 0/1355 dead transitions. [2022-11-20 11:39:55,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 1355 transitions, 16677 flow [2022-11-20 11:39:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:39:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 11:39:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2729 transitions. [2022-11-20 11:39:55,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8200120192307693 [2022-11-20 11:39:55,963 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2729 transitions. [2022-11-20 11:39:55,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2729 transitions. [2022-11-20 11:39:55,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:55,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2729 transitions. [2022-11-20 11:39:55,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 85.28125) internal successors, (2729), 32 states have internal predecessors, (2729), 0 states have call successors, (0), 0 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 11:39:55,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 104.0) internal successors, (3432), 33 states have internal predecessors, (3432), 0 states have call successors, (0), 0 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 11:39:55,977 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 104.0) internal successors, (3432), 33 states have internal predecessors, (3432), 0 states have call successors, (0), 0 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 11:39:55,978 INFO L175 Difference]: Start difference. First operand has 194 places, 181 transitions, 1288 flow. Second operand 32 states and 2729 transitions. [2022-11-20 11:39:55,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 1355 transitions, 16677 flow [2022-11-20 11:39:56,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1355 transitions, 16650 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-20 11:39:56,413 INFO L231 Difference]: Finished difference. Result has 224 places, 200 transitions, 1487 flow [2022-11-20 11:39:56,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1487, PETRI_PLACES=224, PETRI_TRANSITIONS=200} [2022-11-20 11:39:56,414 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 138 predicate places. [2022-11-20 11:39:56,414 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 200 transitions, 1487 flow [2022-11-20 11:39:56,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 82.375) internal successors, (1977), 24 states have internal predecessors, (1977), 0 states have call successors, (0), 0 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 11:39:56,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:56,416 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:39:56,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:56,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:56,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:39:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 312268183, now seen corresponding path program 3 times [2022-11-20 11:39:56,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:56,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790018501] [2022-11-20 11:39:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:56,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:56,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790018501] [2022-11-20 11:39:56,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790018501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:56,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169812803] [2022-11-20 11:39:56,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:39:56,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:56,895 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:56,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:39:57,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 11:39:57,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:57,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:39:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:57,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:57,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169812803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:57,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:57,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 11:39:57,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368085859] [2022-11-20 11:39:57,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:57,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:39:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:57,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:39:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:39:57,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-20 11:39:57,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 200 transitions, 1487 flow. Second operand has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 0 states have call successors, (0), 0 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 11:39:57,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:57,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-20 11:39:57,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:40:02,932 INFO L130 PetriNetUnfolder]: 2400/18810 cut-off events. [2022-11-20 11:40:02,932 INFO L131 PetriNetUnfolder]: For 151711/152269 co-relation queries the response was YES. [2022-11-20 11:40:03,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54131 conditions, 18810 events. 2400/18810 cut-off events. For 151711/152269 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 227836 event pairs, 52 based on Foata normal form. 1444/20174 useless extension candidates. Maximal degree in co-relation 54043. Up to 2013 conditions per place. [2022-11-20 11:40:03,151 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 57 selfloop transitions, 206 changer transitions 0/404 dead transitions. [2022-11-20 11:40:03,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 404 transitions, 3602 flow [2022-11-20 11:40:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:40:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 11:40:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2228 transitions. [2022-11-20 11:40:03,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8926282051282052 [2022-11-20 11:40:03,157 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2228 transitions. [2022-11-20 11:40:03,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2228 transitions. [2022-11-20 11:40:03,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:40:03,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2228 transitions. [2022-11-20 11:40:03,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.83333333333333) internal successors, (2228), 24 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:03,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 104.0) internal successors, (2600), 25 states have internal predecessors, (2600), 0 states have call successors, (0), 0 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 11:40:03,170 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 104.0) internal successors, (2600), 25 states have internal predecessors, (2600), 0 states have call successors, (0), 0 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 11:40:03,170 INFO L175 Difference]: Start difference. First operand has 224 places, 200 transitions, 1487 flow. Second operand 24 states and 2228 transitions. [2022-11-20 11:40:03,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 404 transitions, 3602 flow [2022-11-20 11:40:03,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 404 transitions, 3538 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-11-20 11:40:03,624 INFO L231 Difference]: Finished difference. Result has 258 places, 360 transitions, 3878 flow [2022-11-20 11:40:03,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3878, PETRI_PLACES=258, PETRI_TRANSITIONS=360} [2022-11-20 11:40:03,625 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 172 predicate places. [2022-11-20 11:40:03,626 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 360 transitions, 3878 flow [2022-11-20 11:40:03,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 0 states have call successors, (0), 0 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 11:40:03,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:40:03,627 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:03,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:03,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:40:03,832 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:40:03,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1172350424, now seen corresponding path program 3 times [2022-11-20 11:40:03,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:03,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061667790] [2022-11-20 11:40:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:03,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 56 proven. 620 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 11:40:04,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061667790] [2022-11-20 11:40:04,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061667790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285356917] [2022-11-20 11:40:04,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:40:04,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:04,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:04,904 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:04,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:40:04,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:40:04,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:40:04,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-11-20 11:40:05,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-11-20 11:40:05,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285356917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:40:05,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:40:05,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 27 [2022-11-20 11:40:05,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937188622] [2022-11-20 11:40:05,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:05,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:40:05,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:05,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:40:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:40:05,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-11-20 11:40:05,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 360 transitions, 3878 flow. Second operand has 28 states, 28 states have (on average 71.96428571428571) internal successors, (2015), 28 states have internal predecessors, (2015), 0 states have call successors, (0), 0 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 11:40:05,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:40:05,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-11-20 11:40:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:40:24,738 INFO L130 PetriNetUnfolder]: 19704/53925 cut-off events. [2022-11-20 11:40:24,738 INFO L131 PetriNetUnfolder]: For 531731/536809 co-relation queries the response was YES. [2022-11-20 11:40:25,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212038 conditions, 53925 events. 19704/53925 cut-off events. For 531731/536809 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 672155 event pairs, 559 based on Foata normal form. 1343/50623 useless extension candidates. Maximal degree in co-relation 211921. Up to 9673 conditions per place. [2022-11-20 11:40:25,448 INFO L137 encePairwiseOnDemand]: 95/104 looper letters, 4613 selfloop transitions, 56 changer transitions 0/4745 dead transitions. [2022-11-20 11:40:25,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 4745 transitions, 74691 flow [2022-11-20 11:40:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 11:40:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 11:40:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2952 transitions. [2022-11-20 11:40:25,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7096153846153846 [2022-11-20 11:40:25,453 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2952 transitions. [2022-11-20 11:40:25,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2952 transitions. [2022-11-20 11:40:25,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:40:25,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2952 transitions. [2022-11-20 11:40:25,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 73.8) internal successors, (2952), 40 states have internal predecessors, (2952), 0 states have call successors, (0), 0 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 11:40:25,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 104.0) internal successors, (4264), 41 states have internal predecessors, (4264), 0 states have call successors, (0), 0 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 11:40:25,466 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 104.0) internal successors, (4264), 41 states have internal predecessors, (4264), 0 states have call successors, (0), 0 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 11:40:25,466 INFO L175 Difference]: Start difference. First operand has 258 places, 360 transitions, 3878 flow. Second operand 40 states and 2952 transitions. [2022-11-20 11:40:25,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 4745 transitions, 74691 flow [2022-11-20 11:40:27,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 4745 transitions, 67341 flow, removed 2963 selfloop flow, removed 15 redundant places. [2022-11-20 11:40:27,839 INFO L231 Difference]: Finished difference. Result has 282 places, 364 transitions, 3601 flow [2022-11-20 11:40:27,840 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3601, PETRI_PLACES=282, PETRI_TRANSITIONS=364} [2022-11-20 11:40:27,840 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 196 predicate places. [2022-11-20 11:40:27,840 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 364 transitions, 3601 flow [2022-11-20 11:40:27,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.96428571428571) internal successors, (2015), 28 states have internal predecessors, (2015), 0 states have call successors, (0), 0 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 11:40:27,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:40:27,842 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:27,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 11:40:28,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:40:28,047 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 11:40:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:28,047 INFO L85 PathProgramCache]: Analyzing trace with hash -169701609, now seen corresponding path program 4 times [2022-11-20 11:40:28,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:28,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875753499] [2022-11-20 11:40:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:28,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:28,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:28,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875753499] [2022-11-20 11:40:28,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875753499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:28,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240436917] [2022-11-20 11:40:28,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:40:28,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:28,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:28,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:28,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bbc682-dccf-410d-bafc-a9de0057c5e9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:40:28,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:40:28,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:40:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:29,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:30,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240436917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:40:30,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:40:30,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-20 11:40:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480655671] [2022-11-20 11:40:30,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:40:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:40:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:40:30,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-20 11:40:30,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 364 transitions, 3601 flow. Second operand has 49 states, 49 states have (on average 88.08163265306122) internal successors, (4316), 49 states have internal predecessors, (4316), 0 states have call successors, (0), 0 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 11:40:30,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:40:30,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-20 11:40:30,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand