./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/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_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/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_8bc83faf-504e-46f1-8450-24fa37b716c3/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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:36:48,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:36:48,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:36:48,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:36:48,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:36:48,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:36:48,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:36:48,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:36:49,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:36:49,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:36:49,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:36:49,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:36:49,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:36:49,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:36:49,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:36:49,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:36:49,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:36:49,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:36:49,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:36:49,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:36:49,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:36:49,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:36:49,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:36:49,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:36:49,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:36:49,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:36:49,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:36:49,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:36:49,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:36:49,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:36:49,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:36:49,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:36:49,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:36:49,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:36:49,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:36:49,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:36:49,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:36:49,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:36:49,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:36:49,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:36:49,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:36:49,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 09:36:49,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:36:49,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:36:49,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:36:49,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:36:49,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:36:49,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:36:49,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:36:49,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:36:49,072 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:36:49,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:36:49,073 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:36:49,073 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:36:49,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:36:49,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:36:49,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:36:49,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:36:49,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:36:49,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:36:49,075 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 09:36:49,075 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:36:49,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:36:49,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:36:49,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:36:49,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:36:49,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:36:49,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:36:49,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:36:49,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:36:49,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:36:49,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:36:49,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:36:49,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:36:49,079 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:36:49,079 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:36:49,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:36:49,079 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_8bc83faf-504e-46f1-8450-24fa37b716c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2022-11-20 09:36:49,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:36:49,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:36:49,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:36:49,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:36:49,427 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:36:49,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-20 09:36:52,571 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:36:52,844 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:36:52,844 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-20 09:36:52,856 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/data/7ca7f87f9/23aba408ead449fda5dba04fcf92bede/FLAG83aafce27 [2022-11-20 09:36:52,881 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/data/7ca7f87f9/23aba408ead449fda5dba04fcf92bede [2022-11-20 09:36:52,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:36:52,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:36:52,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:36:52,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:36:52,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:36:52,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:36:52" (1/1) ... [2022-11-20 09:36:52,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d3d877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:52, skipping insertion in model container [2022-11-20 09:36:52,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:36:52" (1/1) ... [2022-11-20 09:36:52,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:36:52,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:36:53,172 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_8bc83faf-504e-46f1-8450-24fa37b716c3/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-20 09:36:53,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:36:53,188 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:36:53,213 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_8bc83faf-504e-46f1-8450-24fa37b716c3/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-20 09:36:53,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:36:53,231 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:36:53,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53 WrapperNode [2022-11-20 09:36:53,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:36:53,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:36:53,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:36:53,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:36:53,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,283 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 271 [2022-11-20 09:36:53,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:36:53,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:36:53,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:36:53,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:36:53,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,322 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:36:53,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:36:53,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:36:53,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:36:53,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (1/1) ... [2022-11-20 09:36:53,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:36:53,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:53,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:36:53,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:36:53,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:36:53,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:36:53,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:36:53,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:36:53,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 09:36:53,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 09:36:53,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 09:36:53,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 09:36:53,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 09:36:53,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 09:36:53,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:36:53,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 09:36:53,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 09:36:53,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:36:53,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:36:53,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:36:53,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:36:53,424 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 09:36:53,580 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:36:53,583 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:36:54,214 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:36:54,463 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:36:54,463 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 09:36:54,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:36:54 BoogieIcfgContainer [2022-11-20 09:36:54,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:36:54,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:36:54,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:36:54,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:36:54,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:36:52" (1/3) ... [2022-11-20 09:36:54,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ac984c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:36:54, skipping insertion in model container [2022-11-20 09:36:54,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:36:53" (2/3) ... [2022-11-20 09:36:54,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ac984c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:36:54, skipping insertion in model container [2022-11-20 09:36:54,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:36:54" (3/3) ... [2022-11-20 09:36:54,475 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2022-11-20 09:36:54,484 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 09:36:54,496 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:36:54,496 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-20 09:36:54,496 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:36:54,668 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 09:36:54,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 250 transitions, 524 flow [2022-11-20 09:36:54,880 INFO L130 PetriNetUnfolder]: 18/247 cut-off events. [2022-11-20 09:36:54,880 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 09:36:54,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 247 events. 18/247 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2022-11-20 09:36:54,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 250 transitions, 524 flow [2022-11-20 09:36:54,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 227 transitions, 472 flow [2022-11-20 09:36:54,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:36:54,913 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;@2d55f4e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:36:54,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-20 09:36:54,929 INFO L130 PetriNetUnfolder]: 3/73 cut-off events. [2022-11-20 09:36:54,929 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:36:54,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:54,930 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] [2022-11-20 09:36:54,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:36:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2011028244, now seen corresponding path program 1 times [2022-11-20 09:36:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:54,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439247529] [2022-11-20 09:36:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:55,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439247529] [2022-11-20 09:36:55,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439247529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:55,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:55,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:36:55,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635123809] [2022-11-20 09:36:55,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:55,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:36:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:36:55,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:36:55,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 250 [2022-11-20 09:36:55,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 227 transitions, 472 flow. Second operand has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:55,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:55,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 250 [2022-11-20 09:36:55,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:56,290 INFO L130 PetriNetUnfolder]: 793/2013 cut-off events. [2022-11-20 09:36:56,290 INFO L131 PetriNetUnfolder]: For 232/232 co-relation queries the response was YES. [2022-11-20 09:36:56,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 2013 events. 793/2013 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13057 event pairs, 472 based on Foata normal form. 252/1401 useless extension candidates. Maximal degree in co-relation 1508. Up to 588 conditions per place. [2022-11-20 09:36:56,320 INFO L137 encePairwiseOnDemand]: 220/250 looper letters, 68 selfloop transitions, 9 changer transitions 5/245 dead transitions. [2022-11-20 09:36:56,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 245 transitions, 680 flow [2022-11-20 09:36:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:36:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:36:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1056 transitions. [2022-11-20 09:36:56,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8448 [2022-11-20 09:36:56,350 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1056 transitions. [2022-11-20 09:36:56,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1056 transitions. [2022-11-20 09:36:56,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:56,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1056 transitions. [2022-11-20 09:36:56,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:56,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:56,376 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:56,378 INFO L175 Difference]: Start difference. First operand has 220 places, 227 transitions, 472 flow. Second operand 5 states and 1056 transitions. [2022-11-20 09:36:56,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 245 transitions, 680 flow [2022-11-20 09:36:56,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 245 transitions, 656 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 09:36:56,395 INFO L231 Difference]: Finished difference. Result has 216 places, 212 transitions, 483 flow [2022-11-20 09:36:56,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=483, PETRI_PLACES=216, PETRI_TRANSITIONS=212} [2022-11-20 09:36:56,404 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, -4 predicate places. [2022-11-20 09:36:56,404 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 212 transitions, 483 flow [2022-11-20 09:36:56,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:56,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:56,406 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:56,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:36:56,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:36:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -794874023, now seen corresponding path program 1 times [2022-11-20 09:36:56,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:56,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318151323] [2022-11-20 09:36:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:56,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318151323] [2022-11-20 09:36:56,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318151323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109214092] [2022-11-20 09:36:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:56,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:56,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:56,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:36:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:36:56,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:56,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:56,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109214092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:56,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:56,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 09:36:56,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138930195] [2022-11-20 09:36:56,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:56,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:36:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:36:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:36:56,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 250 [2022-11-20 09:36:56,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 212 transitions, 483 flow. Second operand has 12 states, 12 states have (on average 191.66666666666666) internal successors, (2300), 12 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:56,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:56,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 250 [2022-11-20 09:36:56,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:58,609 INFO L130 PetriNetUnfolder]: 1981/4903 cut-off events. [2022-11-20 09:36:58,610 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-11-20 09:36:58,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8072 conditions, 4903 events. 1981/4903 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 36477 event pairs, 1180 based on Foata normal form. 6/2774 useless extension candidates. Maximal degree in co-relation 6236. Up to 581 conditions per place. [2022-11-20 09:36:58,652 INFO L137 encePairwiseOnDemand]: 235/250 looper letters, 146 selfloop transitions, 40 changer transitions 0/349 dead transitions. [2022-11-20 09:36:58,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 349 transitions, 1203 flow [2022-11-20 09:36:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:36:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 09:36:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3594 transitions. [2022-11-20 09:36:58,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7986666666666666 [2022-11-20 09:36:58,662 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3594 transitions. [2022-11-20 09:36:58,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3594 transitions. [2022-11-20 09:36:58,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:58,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3594 transitions. [2022-11-20 09:36:58,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 199.66666666666666) internal successors, (3594), 18 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:58,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:58,686 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:58,686 INFO L175 Difference]: Start difference. First operand has 216 places, 212 transitions, 483 flow. Second operand 18 states and 3594 transitions. [2022-11-20 09:36:58,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 349 transitions, 1203 flow [2022-11-20 09:36:58,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 349 transitions, 1198 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:36:58,700 INFO L231 Difference]: Finished difference. Result has 231 places, 239 transitions, 716 flow [2022-11-20 09:36:58,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=716, PETRI_PLACES=231, PETRI_TRANSITIONS=239} [2022-11-20 09:36:58,701 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 11 predicate places. [2022-11-20 09:36:58,701 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 239 transitions, 716 flow [2022-11-20 09:36:58,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 191.66666666666666) internal successors, (2300), 12 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:58,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:58,705 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:58,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 09:36:58,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:58,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:36:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1128709746, now seen corresponding path program 1 times [2022-11-20 09:36:58,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463801693] [2022-11-20 09:36:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:59,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:59,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463801693] [2022-11-20 09:36:59,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463801693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:59,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537805673] [2022-11-20 09:36:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:59,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:59,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:59,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:59,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:36:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:36:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:59,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:36:59,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537805673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:59,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:36:59,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 09:36:59,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514024082] [2022-11-20 09:36:59,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:59,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:36:59,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:59,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:36:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:36:59,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 250 [2022-11-20 09:36:59,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 239 transitions, 716 flow. Second operand has 6 states, 6 states have (on average 191.33333333333334) internal successors, (1148), 6 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 09:36:59,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:59,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 250 [2022-11-20 09:36:59,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:00,607 INFO L130 PetriNetUnfolder]: 1981/4895 cut-off events. [2022-11-20 09:37:00,607 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2022-11-20 09:37:00,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8109 conditions, 4895 events. 1981/4895 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 36517 event pairs, 1180 based on Foata normal form. 8/2768 useless extension candidates. Maximal degree in co-relation 6458. Up to 2280 conditions per place. [2022-11-20 09:37:00,657 INFO L137 encePairwiseOnDemand]: 239/250 looper letters, 69 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2022-11-20 09:37:00,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 259 transitions, 920 flow [2022-11-20 09:37:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:37:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:37:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1400 transitions. [2022-11-20 09:37:00,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-11-20 09:37:00,662 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1400 transitions. [2022-11-20 09:37:00,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1400 transitions. [2022-11-20 09:37:00,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:00,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1400 transitions. [2022-11-20 09:37:00,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.0) internal successors, (1400), 7 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:00,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:00,672 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:00,672 INFO L175 Difference]: Start difference. First operand has 231 places, 239 transitions, 716 flow. Second operand 7 states and 1400 transitions. [2022-11-20 09:37:00,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 259 transitions, 920 flow [2022-11-20 09:37:00,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 259 transitions, 846 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-20 09:37:00,685 INFO L231 Difference]: Finished difference. Result has 226 places, 231 transitions, 642 flow [2022-11-20 09:37:00,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=642, PETRI_PLACES=226, PETRI_TRANSITIONS=231} [2022-11-20 09:37:00,690 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 6 predicate places. [2022-11-20 09:37:00,691 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 231 transitions, 642 flow [2022-11-20 09:37:00,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.33333333333334) internal successors, (1148), 6 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 09:37:00,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:00,692 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:00,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:00,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:00,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:00,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:00,898 INFO L85 PathProgramCache]: Analyzing trace with hash -407268820, now seen corresponding path program 2 times [2022-11-20 09:37:00,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:00,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106450596] [2022-11-20 09:37:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:00,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:01,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106450596] [2022-11-20 09:37:01,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106450596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429958466] [2022-11-20 09:37:01,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:37:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:01,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:01,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:37:01,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:37:01,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:01,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:37:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 09:37:01,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 09:37:01,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429958466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:01,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:01,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 09:37:01,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825814769] [2022-11-20 09:37:01,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:01,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:37:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:37:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:37:01,768 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 250 [2022-11-20 09:37:01,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 231 transitions, 642 flow. Second operand has 18 states, 18 states have (on average 177.61111111111111) internal successors, (3197), 18 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:01,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:01,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 250 [2022-11-20 09:37:01,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:03,950 INFO L130 PetriNetUnfolder]: 1317/4211 cut-off events. [2022-11-20 09:37:03,951 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2022-11-20 09:37:03,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6592 conditions, 4211 events. 1317/4211 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 32155 event pairs, 854 based on Foata normal form. 4/2899 useless extension candidates. Maximal degree in co-relation 5328. Up to 343 conditions per place. [2022-11-20 09:37:03,987 INFO L137 encePairwiseOnDemand]: 227/250 looper letters, 177 selfloop transitions, 65 changer transitions 0/390 dead transitions. [2022-11-20 09:37:03,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 390 transitions, 1539 flow [2022-11-20 09:37:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 09:37:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 09:37:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 8793 transitions. [2022-11-20 09:37:04,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7177959183673469 [2022-11-20 09:37:04,012 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 8793 transitions. [2022-11-20 09:37:04,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 8793 transitions. [2022-11-20 09:37:04,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:04,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 8793 transitions. [2022-11-20 09:37:04,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 179.44897959183675) internal successors, (8793), 49 states have internal predecessors, (8793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:04,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 250.0) internal successors, (12500), 50 states have internal predecessors, (12500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:04,072 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 250.0) internal successors, (12500), 50 states have internal predecessors, (12500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:04,073 INFO L175 Difference]: Start difference. First operand has 226 places, 231 transitions, 642 flow. Second operand 49 states and 8793 transitions. [2022-11-20 09:37:04,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 390 transitions, 1539 flow [2022-11-20 09:37:04,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 390 transitions, 1496 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:37:04,084 INFO L231 Difference]: Finished difference. Result has 269 places, 253 transitions, 851 flow [2022-11-20 09:37:04,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=851, PETRI_PLACES=269, PETRI_TRANSITIONS=253} [2022-11-20 09:37:04,086 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 49 predicate places. [2022-11-20 09:37:04,087 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 253 transitions, 851 flow [2022-11-20 09:37:04,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 177.61111111111111) internal successors, (3197), 18 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:04,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:04,097 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:04,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 09:37:04,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:04,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1722532470, now seen corresponding path program 1 times [2022-11-20 09:37:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846560789] [2022-11-20 09:37:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:04,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:04,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846560789] [2022-11-20 09:37:04,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846560789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:04,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:04,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:37:04,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20451079] [2022-11-20 09:37:04,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:04,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:37:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:37:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:37:04,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 250 [2022-11-20 09:37:04,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 253 transitions, 851 flow. Second operand has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:04,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:04,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 250 [2022-11-20 09:37:04,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:07,547 INFO L130 PetriNetUnfolder]: 6728/14172 cut-off events. [2022-11-20 09:37:07,547 INFO L131 PetriNetUnfolder]: For 460/460 co-relation queries the response was YES. [2022-11-20 09:37:07,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26087 conditions, 14172 events. 6728/14172 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 122727 event pairs, 3311 based on Foata normal form. 0/9433 useless extension candidates. Maximal degree in co-relation 25792. Up to 6091 conditions per place. [2022-11-20 09:37:07,656 INFO L137 encePairwiseOnDemand]: 244/250 looper letters, 60 selfloop transitions, 4 changer transitions 0/292 dead transitions. [2022-11-20 09:37:07,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 292 transitions, 1066 flow [2022-11-20 09:37:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:37:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:37:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1081 transitions. [2022-11-20 09:37:07,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8648 [2022-11-20 09:37:07,660 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1081 transitions. [2022-11-20 09:37:07,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1081 transitions. [2022-11-20 09:37:07,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:07,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1081 transitions. [2022-11-20 09:37:07,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.2) internal successors, (1081), 5 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:07,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:07,666 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:07,667 INFO L175 Difference]: Start difference. First operand has 269 places, 253 transitions, 851 flow. Second operand 5 states and 1081 transitions. [2022-11-20 09:37:07,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 292 transitions, 1066 flow [2022-11-20 09:37:07,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 292 transitions, 983 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-20 09:37:07,674 INFO L231 Difference]: Finished difference. Result has 261 places, 256 transitions, 798 flow [2022-11-20 09:37:07,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=798, PETRI_PLACES=261, PETRI_TRANSITIONS=256} [2022-11-20 09:37:07,675 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 41 predicate places. [2022-11-20 09:37:07,676 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 256 transitions, 798 flow [2022-11-20 09:37:07,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:07,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:07,676 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:07,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:37:07,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:07,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:07,677 INFO L85 PathProgramCache]: Analyzing trace with hash 728100, now seen corresponding path program 1 times [2022-11-20 09:37:07,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:07,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825076192] [2022-11-20 09:37:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:07,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:07,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:07,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825076192] [2022-11-20 09:37:07,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825076192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:07,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:07,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:37:07,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275301205] [2022-11-20 09:37:07,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:37:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:37:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:37:07,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 250 [2022-11-20 09:37:07,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 256 transitions, 798 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:07,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:07,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 250 [2022-11-20 09:37:07,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:09,288 INFO L130 PetriNetUnfolder]: 1422/5478 cut-off events. [2022-11-20 09:37:09,288 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2022-11-20 09:37:09,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8660 conditions, 5478 events. 1422/5478 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 49863 event pairs, 490 based on Foata normal form. 28/3910 useless extension candidates. Maximal degree in co-relation 8382. Up to 2384 conditions per place. [2022-11-20 09:37:09,318 INFO L137 encePairwiseOnDemand]: 246/250 looper letters, 22 selfloop transitions, 3 changer transitions 0/262 dead transitions. [2022-11-20 09:37:09,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 262 transitions, 862 flow [2022-11-20 09:37:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:37:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:37:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-11-20 09:37:09,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8706666666666667 [2022-11-20 09:37:09,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-11-20 09:37:09,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-11-20 09:37:09,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:09,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-11-20 09:37:09,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:09,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:09,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:09,332 INFO L175 Difference]: Start difference. First operand has 261 places, 256 transitions, 798 flow. Second operand 3 states and 653 transitions. [2022-11-20 09:37:09,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 262 transitions, 862 flow [2022-11-20 09:37:09,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 262 transitions, 860 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:37:09,341 INFO L231 Difference]: Finished difference. Result has 263 places, 258 transitions, 815 flow [2022-11-20 09:37:09,341 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=815, PETRI_PLACES=263, PETRI_TRANSITIONS=258} [2022-11-20 09:37:09,344 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 43 predicate places. [2022-11-20 09:37:09,344 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 258 transitions, 815 flow [2022-11-20 09:37:09,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:09,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:09,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:09,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:37:09,346 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash -913342109, now seen corresponding path program 1 times [2022-11-20 09:37:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:09,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649640771] [2022-11-20 09:37:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:09,484 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 09:37:09,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:09,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649640771] [2022-11-20 09:37:09,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649640771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:09,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313906795] [2022-11-20 09:37:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:09,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:09,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:09,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:37:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:37:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:37:09,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:37:09,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313906795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:09,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:37:09,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-11-20 09:37:09,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160951486] [2022-11-20 09:37:09,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:09,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:37:09,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:37:09,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:09,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 250 [2022-11-20 09:37:09,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 258 transitions, 815 flow. Second operand has 6 states, 6 states have (on average 190.5) internal successors, (1143), 6 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:09,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:09,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 250 [2022-11-20 09:37:09,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:11,320 INFO L130 PetriNetUnfolder]: 1429/5922 cut-off events. [2022-11-20 09:37:11,320 INFO L131 PetriNetUnfolder]: For 1310/1646 co-relation queries the response was YES. [2022-11-20 09:37:11,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10131 conditions, 5922 events. 1429/5922 cut-off events. For 1310/1646 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 54482 event pairs, 1218 based on Foata normal form. 70/4347 useless extension candidates. Maximal degree in co-relation 9204. Up to 2463 conditions per place. [2022-11-20 09:37:11,365 INFO L137 encePairwiseOnDemand]: 239/250 looper letters, 99 selfloop transitions, 21 changer transitions 0/294 dead transitions. [2022-11-20 09:37:11,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 294 transitions, 1202 flow [2022-11-20 09:37:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:37:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1748 transitions. [2022-11-20 09:37:11,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7768888888888889 [2022-11-20 09:37:11,372 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1748 transitions. [2022-11-20 09:37:11,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1748 transitions. [2022-11-20 09:37:11,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:11,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1748 transitions. [2022-11-20 09:37:11,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.22222222222223) internal successors, (1748), 9 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:11,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:11,385 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:11,385 INFO L175 Difference]: Start difference. First operand has 263 places, 258 transitions, 815 flow. Second operand 9 states and 1748 transitions. [2022-11-20 09:37:11,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 294 transitions, 1202 flow [2022-11-20 09:37:11,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 294 transitions, 1199 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:37:11,397 INFO L231 Difference]: Finished difference. Result has 272 places, 259 transitions, 868 flow [2022-11-20 09:37:11,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=868, PETRI_PLACES=272, PETRI_TRANSITIONS=259} [2022-11-20 09:37:11,399 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 52 predicate places. [2022-11-20 09:37:11,399 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 259 transitions, 868 flow [2022-11-20 09:37:11,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.5) internal successors, (1143), 6 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:11,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:11,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:11,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:11,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:11,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1705646169, now seen corresponding path program 1 times [2022-11-20 09:37:11,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:11,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082705474] [2022-11-20 09:37:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:11,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:11,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082705474] [2022-11-20 09:37:11,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082705474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:11,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:11,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:37:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509576435] [2022-11-20 09:37:11,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:11,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:37:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:37:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:37:11,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 250 [2022-11-20 09:37:11,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 259 transitions, 868 flow. Second operand has 4 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:11,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:11,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 250 [2022-11-20 09:37:11,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:13,232 INFO L130 PetriNetUnfolder]: 1961/6300 cut-off events. [2022-11-20 09:37:13,232 INFO L131 PetriNetUnfolder]: For 1260/1428 co-relation queries the response was YES. [2022-11-20 09:37:13,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11069 conditions, 6300 events. 1961/6300 cut-off events. For 1260/1428 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 55601 event pairs, 700 based on Foata normal form. 224/4445 useless extension candidates. Maximal degree in co-relation 10278. Up to 2425 conditions per place. [2022-11-20 09:37:13,271 INFO L137 encePairwiseOnDemand]: 244/250 looper letters, 35 selfloop transitions, 4 changer transitions 0/268 dead transitions. [2022-11-20 09:37:13,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 268 transitions, 972 flow [2022-11-20 09:37:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:37:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 09:37:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2022-11-20 09:37:13,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.857 [2022-11-20 09:37:13,275 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2022-11-20 09:37:13,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2022-11-20 09:37:13,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:13,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2022-11-20 09:37:13,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:13,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:13,280 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:13,281 INFO L175 Difference]: Start difference. First operand has 272 places, 259 transitions, 868 flow. Second operand 4 states and 857 transitions. [2022-11-20 09:37:13,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 268 transitions, 972 flow [2022-11-20 09:37:13,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 268 transitions, 946 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:37:13,290 INFO L231 Difference]: Finished difference. Result has 271 places, 260 transitions, 860 flow [2022-11-20 09:37:13,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=860, PETRI_PLACES=271, PETRI_TRANSITIONS=260} [2022-11-20 09:37:13,291 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 51 predicate places. [2022-11-20 09:37:13,292 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 260 transitions, 860 flow [2022-11-20 09:37:13,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:13,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:13,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:13,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:37:13,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:13,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1680834474, now seen corresponding path program 1 times [2022-11-20 09:37:13,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:13,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411086095] [2022-11-20 09:37:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:13,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:13,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:13,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411086095] [2022-11-20 09:37:13,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411086095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626124944] [2022-11-20 09:37:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:13,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:13,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:13,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:13,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:37:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:37:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:13,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:14,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626124944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:14,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:14,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 09:37:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009066508] [2022-11-20 09:37:14,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:37:14,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:14,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:37:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:37:14,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 250 [2022-11-20 09:37:14,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 260 transitions, 860 flow. Second operand has 19 states, 19 states have (on average 170.21052631578948) internal successors, (3234), 19 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:14,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:14,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 250 [2022-11-20 09:37:14,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:21,581 INFO L130 PetriNetUnfolder]: 14897/35234 cut-off events. [2022-11-20 09:37:21,581 INFO L131 PetriNetUnfolder]: For 8224/8322 co-relation queries the response was YES. [2022-11-20 09:37:21,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75410 conditions, 35234 events. 14897/35234 cut-off events. For 8224/8322 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 373118 event pairs, 3423 based on Foata normal form. 651/26967 useless extension candidates. Maximal degree in co-relation 64613. Up to 6403 conditions per place. [2022-11-20 09:37:21,844 INFO L137 encePairwiseOnDemand]: 227/250 looper letters, 287 selfloop transitions, 54 changer transitions 15/495 dead transitions. [2022-11-20 09:37:21,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 495 transitions, 2479 flow [2022-11-20 09:37:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 09:37:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-20 09:37:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5038 transitions. [2022-11-20 09:37:21,859 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6948965517241379 [2022-11-20 09:37:21,859 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5038 transitions. [2022-11-20 09:37:21,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5038 transitions. [2022-11-20 09:37:21,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:21,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5038 transitions. [2022-11-20 09:37:21,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 173.72413793103448) internal successors, (5038), 29 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:21,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 250.0) internal successors, (7500), 30 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:21,890 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 250.0) internal successors, (7500), 30 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:21,890 INFO L175 Difference]: Start difference. First operand has 271 places, 260 transitions, 860 flow. Second operand 29 states and 5038 transitions. [2022-11-20 09:37:21,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 495 transitions, 2479 flow [2022-11-20 09:37:21,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 495 transitions, 2463 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 09:37:21,949 INFO L231 Difference]: Finished difference. Result has 306 places, 280 transitions, 1152 flow [2022-11-20 09:37:21,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1152, PETRI_PLACES=306, PETRI_TRANSITIONS=280} [2022-11-20 09:37:21,951 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 86 predicate places. [2022-11-20 09:37:21,951 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 280 transitions, 1152 flow [2022-11-20 09:37:21,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 170.21052631578948) internal successors, (3234), 19 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:21,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:21,953 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:21,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:22,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:22,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:22,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash -797156253, now seen corresponding path program 1 times [2022-11-20 09:37:22,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:22,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693802926] [2022-11-20 09:37:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:22,431 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 09:37:22,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:22,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693802926] [2022-11-20 09:37:22,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693802926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:22,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:22,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:37:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146109529] [2022-11-20 09:37:22,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:22,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:37:22,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:37:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:37:22,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 250 [2022-11-20 09:37:22,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 280 transitions, 1152 flow. Second operand has 6 states, 6 states have (on average 191.5) internal successors, (1149), 6 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:22,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:22,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 250 [2022-11-20 09:37:22,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:25,278 INFO L130 PetriNetUnfolder]: 3377/12857 cut-off events. [2022-11-20 09:37:25,278 INFO L131 PetriNetUnfolder]: For 5452/6000 co-relation queries the response was YES. [2022-11-20 09:37:25,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24586 conditions, 12857 events. 3377/12857 cut-off events. For 5452/6000 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 138117 event pairs, 2316 based on Foata normal form. 284/9448 useless extension candidates. Maximal degree in co-relation 20605. Up to 5535 conditions per place. [2022-11-20 09:37:25,364 INFO L137 encePairwiseOnDemand]: 239/250 looper letters, 93 selfloop transitions, 14 changer transitions 5/294 dead transitions. [2022-11-20 09:37:25,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 294 transitions, 1450 flow [2022-11-20 09:37:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:37:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:37:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1366 transitions. [2022-11-20 09:37:25,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7805714285714286 [2022-11-20 09:37:25,368 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1366 transitions. [2022-11-20 09:37:25,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1366 transitions. [2022-11-20 09:37:25,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:25,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1366 transitions. [2022-11-20 09:37:25,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:25,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:25,375 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:25,375 INFO L175 Difference]: Start difference. First operand has 306 places, 280 transitions, 1152 flow. Second operand 7 states and 1366 transitions. [2022-11-20 09:37:25,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 294 transitions, 1450 flow [2022-11-20 09:37:25,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 294 transitions, 1371 flow, removed 12 selfloop flow, removed 15 redundant places. [2022-11-20 09:37:25,396 INFO L231 Difference]: Finished difference. Result has 297 places, 280 transitions, 1118 flow [2022-11-20 09:37:25,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1118, PETRI_PLACES=297, PETRI_TRANSITIONS=280} [2022-11-20 09:37:25,397 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 77 predicate places. [2022-11-20 09:37:25,397 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 280 transitions, 1118 flow [2022-11-20 09:37:25,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.5) internal successors, (1149), 6 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:25,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:25,398 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:25,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 09:37:25,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:25,399 INFO L85 PathProgramCache]: Analyzing trace with hash 519092480, now seen corresponding path program 1 times [2022-11-20 09:37:25,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:25,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645208942] [2022-11-20 09:37:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:37:25,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:25,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645208942] [2022-11-20 09:37:25,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645208942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380593790] [2022-11-20 09:37:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:25,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:25,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:25,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:25,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:37:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:25,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:37:25,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 09:37:25,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:37:25,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380593790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:25,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:37:25,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 09:37:25,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580613264] [2022-11-20 09:37:25,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:25,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:37:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:37:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:37:25,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 250 [2022-11-20 09:37:25,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 280 transitions, 1118 flow. Second operand has 6 states, 6 states have (on average 205.33333333333334) internal successors, (1232), 6 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:25,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:25,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 250 [2022-11-20 09:37:25,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:30,905 INFO L130 PetriNetUnfolder]: 13277/25887 cut-off events. [2022-11-20 09:37:30,905 INFO L131 PetriNetUnfolder]: For 12217/12217 co-relation queries the response was YES. [2022-11-20 09:37:31,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68065 conditions, 25887 events. 13277/25887 cut-off events. For 12217/12217 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 235100 event pairs, 542 based on Foata normal form. 382/19458 useless extension candidates. Maximal degree in co-relation 67794. Up to 8319 conditions per place. [2022-11-20 09:37:31,096 INFO L137 encePairwiseOnDemand]: 245/250 looper letters, 76 selfloop transitions, 12 changer transitions 0/327 dead transitions. [2022-11-20 09:37:31,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 327 transitions, 1463 flow [2022-11-20 09:37:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:37:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:37:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1496 transitions. [2022-11-20 09:37:31,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8548571428571429 [2022-11-20 09:37:31,099 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1496 transitions. [2022-11-20 09:37:31,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1496 transitions. [2022-11-20 09:37:31,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:31,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1496 transitions. [2022-11-20 09:37:31,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:31,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:31,107 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:31,107 INFO L175 Difference]: Start difference. First operand has 297 places, 280 transitions, 1118 flow. Second operand 7 states and 1496 transitions. [2022-11-20 09:37:31,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 327 transitions, 1463 flow [2022-11-20 09:37:31,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 327 transitions, 1434 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-20 09:37:31,247 INFO L231 Difference]: Finished difference. Result has 297 places, 278 transitions, 1099 flow [2022-11-20 09:37:31,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1099, PETRI_PLACES=297, PETRI_TRANSITIONS=278} [2022-11-20 09:37:31,248 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 77 predicate places. [2022-11-20 09:37:31,248 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 278 transitions, 1099 flow [2022-11-20 09:37:31,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.33333333333334) internal successors, (1232), 6 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:31,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:31,249 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:31,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 09:37:31,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:31,454 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:31,454 INFO L85 PathProgramCache]: Analyzing trace with hash -35413913, now seen corresponding path program 1 times [2022-11-20 09:37:31,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:31,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641228415] [2022-11-20 09:37:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:31,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:32,551 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 09:37:32,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:32,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641228415] [2022-11-20 09:37:32,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641228415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:32,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217163908] [2022-11-20 09:37:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:32,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:32,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:32,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:32,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:37:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:37:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:34,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 09:37:34,080 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 09:37:34,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:34,165 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 09:37:34,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-11-20 09:37:35,393 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 09:37:35,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217163908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:35,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:35,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 36 [2022-11-20 09:37:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754329103] [2022-11-20 09:37:35,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:35,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 09:37:35,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:35,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 09:37:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 09:37:35,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 250 [2022-11-20 09:37:35,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 278 transitions, 1099 flow. Second operand has 37 states, 37 states have (on average 147.3783783783784) internal successors, (5453), 37 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:35,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:35,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 250 [2022-11-20 09:37:35,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:46,458 INFO L130 PetriNetUnfolder]: 18209/49198 cut-off events. [2022-11-20 09:37:46,459 INFO L131 PetriNetUnfolder]: For 19540/20852 co-relation queries the response was YES. [2022-11-20 09:37:46,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101662 conditions, 49198 events. 18209/49198 cut-off events. For 19540/20852 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 585410 event pairs, 5271 based on Foata normal form. 1088/38087 useless extension candidates. Maximal degree in co-relation 101319. Up to 11680 conditions per place. [2022-11-20 09:37:47,088 INFO L137 encePairwiseOnDemand]: 218/250 looper letters, 262 selfloop transitions, 69 changer transitions 1/458 dead transitions. [2022-11-20 09:37:47,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 458 transitions, 2353 flow [2022-11-20 09:37:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 09:37:47,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 09:37:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5985 transitions. [2022-11-20 09:37:47,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5985 [2022-11-20 09:37:47,097 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5985 transitions. [2022-11-20 09:37:47,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5985 transitions. [2022-11-20 09:37:47,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:47,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5985 transitions. [2022-11-20 09:37:47,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 149.625) internal successors, (5985), 40 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:47,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 250.0) internal successors, (10250), 41 states have internal predecessors, (10250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:47,130 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 250.0) internal successors, (10250), 41 states have internal predecessors, (10250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:47,130 INFO L175 Difference]: Start difference. First operand has 297 places, 278 transitions, 1099 flow. Second operand 40 states and 5985 transitions. [2022-11-20 09:37:47,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 458 transitions, 2353 flow [2022-11-20 09:37:47,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 458 transitions, 2327 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-20 09:37:47,206 INFO L231 Difference]: Finished difference. Result has 338 places, 310 transitions, 1384 flow [2022-11-20 09:37:47,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1384, PETRI_PLACES=338, PETRI_TRANSITIONS=310} [2022-11-20 09:37:47,208 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 118 predicate places. [2022-11-20 09:37:47,208 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 310 transitions, 1384 flow [2022-11-20 09:37:47,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 147.3783783783784) internal successors, (5453), 37 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:47,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:47,210 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:47,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:47,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:47,416 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash 310813256, now seen corresponding path program 1 times [2022-11-20 09:37:47,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:47,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272012048] [2022-11-20 09:37:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:47,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:47,654 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 09:37:47,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272012048] [2022-11-20 09:37:47,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272012048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751483126] [2022-11-20 09:37:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:47,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:47,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:47,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:47,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:37:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:37:47,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:37:47,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:37:47,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751483126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:47,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:37:47,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 09:37:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257812389] [2022-11-20 09:37:47,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:47,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:37:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:37:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:47,942 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 250 [2022-11-20 09:37:47,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 310 transitions, 1384 flow. Second operand has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:47,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:47,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 250 [2022-11-20 09:37:47,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:50,869 INFO L130 PetriNetUnfolder]: 2865/13266 cut-off events. [2022-11-20 09:37:50,869 INFO L131 PetriNetUnfolder]: For 14190/14640 co-relation queries the response was YES. [2022-11-20 09:37:50,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30560 conditions, 13266 events. 2865/13266 cut-off events. For 14190/14640 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 149169 event pairs, 1828 based on Foata normal form. 774/12111 useless extension candidates. Maximal degree in co-relation 30234. Up to 5001 conditions per place. [2022-11-20 09:37:50,973 INFO L137 encePairwiseOnDemand]: 245/250 looper letters, 39 selfloop transitions, 3 changer transitions 0/306 dead transitions. [2022-11-20 09:37:50,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 306 transitions, 1440 flow [2022-11-20 09:37:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:37:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 09:37:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2022-11-20 09:37:50,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.849 [2022-11-20 09:37:50,977 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2022-11-20 09:37:50,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2022-11-20 09:37:50,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:50,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2022-11-20 09:37:50,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:50,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:50,983 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:50,983 INFO L175 Difference]: Start difference. First operand has 338 places, 310 transitions, 1384 flow. Second operand 4 states and 849 transitions. [2022-11-20 09:37:50,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 306 transitions, 1440 flow [2022-11-20 09:37:51,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 306 transitions, 1377 flow, removed 6 selfloop flow, removed 17 redundant places. [2022-11-20 09:37:51,056 INFO L231 Difference]: Finished difference. Result has 322 places, 306 transitions, 1299 flow [2022-11-20 09:37:51,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1299, PETRI_PLACES=322, PETRI_TRANSITIONS=306} [2022-11-20 09:37:51,059 INFO L288 CegarLoopForPetriNet]: 220 programPoint places, 102 predicate places. [2022-11-20 09:37:51,060 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 306 transitions, 1299 flow [2022-11-20 09:37:51,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:51,060 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:51,061 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:51,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:51,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:51,272 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-20 09:37:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash 310813254, now seen corresponding path program 1 times [2022-11-20 09:37:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:51,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273162735] [2022-11-20 09:37:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:54,140 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 09:37:54,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273162735] [2022-11-20 09:37:54,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273162735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:54,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570211001] [2022-11-20 09:37:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:54,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:54,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:54,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:54,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bc83faf-504e-46f1-8450-24fa37b716c3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:37:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:54,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 09:37:54,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:55,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:37:55,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:37:56,529 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 09:37:56,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 09:37:56,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:37:57,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:37:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:37:57,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 09:37:57,571 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 09:37:57,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 09:37:57,624 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 09:37:57,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:57,696 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_350 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_350) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2022-11-20 09:38:00,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:38:00,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-20 09:38:00,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:38:00,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 212 [2022-11-20 09:38:00,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 112 [2022-11-20 09:38:00,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:38:00,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 164 [2022-11-20 09:38:00,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:38:00,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 105 [2022-11-20 09:38:01,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:38:01,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2022-11-20 09:38:02,733 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 09:38:02,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570211001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:02,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:38:02,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 25] total 69 [2022-11-20 09:38:02,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911128227] [2022-11-20 09:38:02,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:02,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 09:38:02,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:02,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 09:38:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=4321, Unknown=11, NotChecked=134, Total=4830 [2022-11-20 09:38:02,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 250 [2022-11-20 09:38:02,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 306 transitions, 1299 flow. Second operand has 70 states, 70 states have (on average 104.31428571428572) internal successors, (7302), 70 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:02,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:02,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 250 [2022-11-20 09:38:02,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand