./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8 --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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- 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-e04fb08 [2022-11-16 12:21:06,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:21:06,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:21:06,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:21:06,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:21:06,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:21:06,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:21:06,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:21:06,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:21:06,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:21:06,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:21:06,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:21:06,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:21:06,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:21:06,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:21:06,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:21:06,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:21:06,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:21:06,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:21:06,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:21:06,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:21:06,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:21:06,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:21:06,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:21:06,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:21:06,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:21:06,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:21:06,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:21:06,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:21:06,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:21:06,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:21:06,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:21:06,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:21:06,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:21:06,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:21:06,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:21:06,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:21:06,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:21:06,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:21:06,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:21:06,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:21:06,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:21:06,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:21:06,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:21:06,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:21:06,313 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:21:06,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:21:06,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:21:06,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:21:06,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:21:06,315 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:21:06,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:21:06,316 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:21:06,316 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:21:06,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:21:06,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:21:06,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:21:06,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:21:06,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:21:06,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:21:06,317 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:21:06,317 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:21:06,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:21:06,318 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:21:06,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:21:06,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:21:06,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:21:06,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:21:06,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:21:06,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:21:06,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:21:06,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:21:06,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:21:06,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:21:06,320 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:21:06,320 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:21:06,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:21:06,321 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_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-16 12:21:06,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:21:06,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:21:06,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:21:06,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:21:06,670 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:21:06,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-16 12:21:06,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/data/f42f24640/95ba96c7dc614f748d659d3d68647b7c/FLAGfab34ffee [2022-11-16 12:21:07,344 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:21:07,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-16 12:21:07,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/data/f42f24640/95ba96c7dc614f748d659d3d68647b7c/FLAGfab34ffee [2022-11-16 12:21:07,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/data/f42f24640/95ba96c7dc614f748d659d3d68647b7c [2022-11-16 12:21:07,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:21:07,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:21:07,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:21:07,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:21:07,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:21:07,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:21:07" (1/1) ... [2022-11-16 12:21:07,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4fd745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:07, skipping insertion in model container [2022-11-16 12:21:07,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:21:07" (1/1) ... [2022-11-16 12:21:07,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:21:07,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:21:07,988 WARN L229 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_5a45ca71-4b80-4a33-a4f3-5f81f030c412/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-16 12:21:07,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:21:08,004 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:21:08,024 WARN L229 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_5a45ca71-4b80-4a33-a4f3-5f81f030c412/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-16 12:21:08,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:21:08,040 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:21:08,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08 WrapperNode [2022-11-16 12:21:08,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:21:08,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:21:08,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:21:08,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:21:08,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,079 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2022-11-16 12:21:08,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:21:08,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:21:08,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:21:08,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:21:08,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:21:08,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:21:08,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:21:08,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:21:08,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (1/1) ... [2022-11-16 12:21:08,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:21:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:08,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:21:08,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:21:08,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:21:08,212 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:21:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:21:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:21:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:21:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:21:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:21:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:21:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:21:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:21:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:21:08,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:21:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:21:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:21:08,221 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:21:08,390 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:21:08,406 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:21:08,661 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:21:08,737 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:21:08,737 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:21:08,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:21:08 BoogieIcfgContainer [2022-11-16 12:21:08,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:21:08,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:21:08,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:21:08,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:21:08,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:21:07" (1/3) ... [2022-11-16 12:21:08,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddb2bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:21:08, skipping insertion in model container [2022-11-16 12:21:08,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:21:08" (2/3) ... [2022-11-16 12:21:08,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddb2bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:21:08, skipping insertion in model container [2022-11-16 12:21:08,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:21:08" (3/3) ... [2022-11-16 12:21:08,751 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-16 12:21:08,760 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:21:08,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:21:08,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-16 12:21:08,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:21:08,843 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:21:08,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 192 flow [2022-11-16 12:21:08,938 INFO L130 PetriNetUnfolder]: 5/86 cut-off events. [2022-11-16 12:21:08,938 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:21:08,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-11-16 12:21:08,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 88 transitions, 192 flow [2022-11-16 12:21:08,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 67 transitions, 143 flow [2022-11-16 12:21:08,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:21:08,969 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;@2980161a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:21:08,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-16 12:21:08,982 INFO L130 PetriNetUnfolder]: 1/31 cut-off events. [2022-11-16 12:21:08,983 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:21:08,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:08,984 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] [2022-11-16 12:21:08,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash -120636830, now seen corresponding path program 1 times [2022-11-16 12:21:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:09,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570746427] [2022-11-16 12:21:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:09,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:09,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:09,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570746427] [2022-11-16 12:21:09,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570746427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:09,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:09,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:21:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891318462] [2022-11-16 12:21:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:09,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:09,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:09,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:09,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-16 12:21:09,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:09,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-16 12:21:09,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:09,755 INFO L130 PetriNetUnfolder]: 18/144 cut-off events. [2022-11-16 12:21:09,755 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-16 12:21:09,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 144 events. 18/144 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 462 event pairs, 8 based on Foata normal form. 15/126 useless extension candidates. Maximal degree in co-relation 130. Up to 31 conditions per place. [2022-11-16 12:21:09,759 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 9 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2022-11-16 12:21:09,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 173 flow [2022-11-16 12:21:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:21:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2022-11-16 12:21:09,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9015151515151515 [2022-11-16 12:21:09,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2022-11-16 12:21:09,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2022-11-16 12:21:09,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:09,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2022-11-16 12:21:09,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,802 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 143 flow. Second operand 3 states and 238 transitions. [2022-11-16 12:21:09,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 173 flow [2022-11-16 12:21:09,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 165 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 12:21:09,817 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 150 flow [2022-11-16 12:21:09,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-16 12:21:09,828 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2022-11-16 12:21:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 150 flow [2022-11-16 12:21:09,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:09,829 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] [2022-11-16 12:21:09,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:21:09,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash 32133125, now seen corresponding path program 1 times [2022-11-16 12:21:09,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:09,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883647478] [2022-11-16 12:21:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:09,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:09,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:09,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883647478] [2022-11-16 12:21:09,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883647478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:09,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:09,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:21:09,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348831419] [2022-11-16 12:21:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:09,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:21:09,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:09,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:21:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:21:09,987 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-16 12:21:09,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:09,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-16 12:21:09,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:10,153 INFO L130 PetriNetUnfolder]: 94/248 cut-off events. [2022-11-16 12:21:10,154 INFO L131 PetriNetUnfolder]: For 35/42 co-relation queries the response was YES. [2022-11-16 12:21:10,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 248 events. 94/248 cut-off events. For 35/42 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1132 event pairs, 3 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 378. Up to 122 conditions per place. [2022-11-16 12:21:10,159 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 30 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2022-11-16 12:21:10,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 275 flow [2022-11-16 12:21:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:21:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:21:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 358 transitions. [2022-11-16 12:21:10,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8136363636363636 [2022-11-16 12:21:10,170 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 358 transitions. [2022-11-16 12:21:10,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 358 transitions. [2022-11-16 12:21:10,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:10,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 358 transitions. [2022-11-16 12:21:10,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.6) internal successors, (358), 5 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,179 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,179 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 150 flow. Second operand 5 states and 358 transitions. [2022-11-16 12:21:10,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 275 flow [2022-11-16 12:21:10,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:21:10,185 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 178 flow [2022-11-16 12:21:10,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-16 12:21:10,187 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 5 predicate places. [2022-11-16 12:21:10,187 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 178 flow [2022-11-16 12:21:10,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:10,189 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:10,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:21:10,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:10,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1013911830, now seen corresponding path program 1 times [2022-11-16 12:21:10,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:10,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838197257] [2022-11-16 12:21:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:10,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:10,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838197257] [2022-11-16 12:21:10,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838197257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828445483] [2022-11-16 12:21:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:10,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:10,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:10,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:10,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:21:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:21:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:10,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:10,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828445483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:10,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:10,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 12:21:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485976168] [2022-11-16 12:21:10,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:10,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:21:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:10,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:21:10,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:21:10,561 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-16 12:21:10,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:10,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-16 12:21:10,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:10,697 INFO L130 PetriNetUnfolder]: 42/296 cut-off events. [2022-11-16 12:21:10,698 INFO L131 PetriNetUnfolder]: For 44/48 co-relation queries the response was YES. [2022-11-16 12:21:10,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 296 events. 42/296 cut-off events. For 44/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1292 event pairs, 3 based on Foata normal form. 5/248 useless extension candidates. Maximal degree in co-relation 435. Up to 59 conditions per place. [2022-11-16 12:21:10,702 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 17 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2022-11-16 12:21:10,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 87 transitions, 308 flow [2022-11-16 12:21:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:21:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:21:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 544 transitions. [2022-11-16 12:21:10,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8831168831168831 [2022-11-16 12:21:10,705 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 544 transitions. [2022-11-16 12:21:10,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 544 transitions. [2022-11-16 12:21:10,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:10,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 544 transitions. [2022-11-16 12:21:10,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,709 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,709 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 178 flow. Second operand 7 states and 544 transitions. [2022-11-16 12:21:10,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 87 transitions, 308 flow [2022-11-16 12:21:10,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:21:10,713 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 285 flow [2022-11-16 12:21:10,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=285, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2022-11-16 12:21:10,714 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-11-16 12:21:10,714 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 285 flow [2022-11-16 12:21:10,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:10,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:10,715 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:10,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:10,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:10,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:10,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1013911831, now seen corresponding path program 1 times [2022-11-16 12:21:10,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:10,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704877626] [2022-11-16 12:21:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:10,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:11,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:11,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704877626] [2022-11-16 12:21:11,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704877626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:11,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294168929] [2022-11-16 12:21:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:11,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:11,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:11,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:11,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:21:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:11,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:21:11,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:11,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:21:11,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294168929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:11,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:21:11,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-16 12:21:11,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075461504] [2022-11-16 12:21:11,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:21:11,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:21:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:21:11,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-16 12:21:11,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:11,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:11,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-16 12:21:11,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:11,307 INFO L130 PetriNetUnfolder]: 40/322 cut-off events. [2022-11-16 12:21:11,308 INFO L131 PetriNetUnfolder]: For 599/599 co-relation queries the response was YES. [2022-11-16 12:21:11,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 322 events. 40/322 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1489 event pairs, 6 based on Foata normal form. 11/297 useless extension candidates. Maximal degree in co-relation 373. Up to 57 conditions per place. [2022-11-16 12:21:11,312 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 12 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2022-11-16 12:21:11,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 357 flow [2022-11-16 12:21:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:21:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:21:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 304 transitions. [2022-11-16 12:21:11,314 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2022-11-16 12:21:11,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 304 transitions. [2022-11-16 12:21:11,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 304 transitions. [2022-11-16 12:21:11,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:11,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 304 transitions. [2022-11-16 12:21:11,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:11,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:11,318 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:11,318 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 285 flow. Second operand 4 states and 304 transitions. [2022-11-16 12:21:11,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 357 flow [2022-11-16 12:21:11,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 341 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-16 12:21:11,324 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 339 flow [2022-11-16 12:21:11,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2022-11-16 12:21:11,325 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 17 predicate places. [2022-11-16 12:21:11,325 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 339 flow [2022-11-16 12:21:11,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:11,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:11,326 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] [2022-11-16 12:21:11,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:11,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:11,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:11,533 INFO L85 PathProgramCache]: Analyzing trace with hash -588297799, now seen corresponding path program 1 times [2022-11-16 12:21:11,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:11,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558179615] [2022-11-16 12:21:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:11,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:11,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:11,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558179615] [2022-11-16 12:21:11,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558179615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:11,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437169102] [2022-11-16 12:21:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:11,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:11,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:11,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:21:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:21:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:11,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:11,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437169102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:11,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:11,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:21:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600196194] [2022-11-16 12:21:11,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:11,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:21:11,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:21:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:21:11,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-16 12:21:11,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:11,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:11,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-16 12:21:11,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:12,415 INFO L130 PetriNetUnfolder]: 302/1016 cut-off events. [2022-11-16 12:21:12,415 INFO L131 PetriNetUnfolder]: For 4293/4293 co-relation queries the response was YES. [2022-11-16 12:21:12,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1016 events. 302/1016 cut-off events. For 4293/4293 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6065 event pairs, 16 based on Foata normal form. 22/924 useless extension candidates. Maximal degree in co-relation 2971. Up to 230 conditions per place. [2022-11-16 12:21:12,428 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 131 selfloop transitions, 18 changer transitions 2/197 dead transitions. [2022-11-16 12:21:12,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 197 transitions, 1634 flow [2022-11-16 12:21:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:21:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:21:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1247 transitions. [2022-11-16 12:21:12,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7872474747474747 [2022-11-16 12:21:12,432 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1247 transitions. [2022-11-16 12:21:12,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1247 transitions. [2022-11-16 12:21:12,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:12,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1247 transitions. [2022-11-16 12:21:12,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.27777777777777) internal successors, (1247), 18 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:12,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:12,440 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:12,441 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 339 flow. Second operand 18 states and 1247 transitions. [2022-11-16 12:21:12,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 197 transitions, 1634 flow [2022-11-16 12:21:12,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 197 transitions, 1457 flow, removed 88 selfloop flow, removed 1 redundant places. [2022-11-16 12:21:12,451 INFO L231 Difference]: Finished difference. Result has 107 places, 90 transitions, 416 flow [2022-11-16 12:21:12,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=416, PETRI_PLACES=107, PETRI_TRANSITIONS=90} [2022-11-16 12:21:12,452 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 37 predicate places. [2022-11-16 12:21:12,452 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 416 flow [2022-11-16 12:21:12,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:12,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:12,453 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:12,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:12,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:12,659 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:12,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1057362306, now seen corresponding path program 1 times [2022-11-16 12:21:12,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:12,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850066741] [2022-11-16 12:21:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:12,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:12,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:12,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850066741] [2022-11-16 12:21:12,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850066741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:12,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428246939] [2022-11-16 12:21:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:12,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:12,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:12,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:12,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:21:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:12,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:21:12,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:12,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:21:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428246939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:12,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:21:12,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:21:12,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924877007] [2022-11-16 12:21:12,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:12,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:21:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:21:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:21:12,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-16 12:21:12,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 90 transitions, 416 flow. Second operand has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:12,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:12,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-16 12:21:12,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:13,169 INFO L130 PetriNetUnfolder]: 270/944 cut-off events. [2022-11-16 12:21:13,169 INFO L131 PetriNetUnfolder]: For 2519/2592 co-relation queries the response was YES. [2022-11-16 12:21:13,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 944 events. 270/944 cut-off events. For 2519/2592 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5855 event pairs, 37 based on Foata normal form. 52/858 useless extension candidates. Maximal degree in co-relation 2508. Up to 266 conditions per place. [2022-11-16 12:21:13,178 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 46 selfloop transitions, 11 changer transitions 2/105 dead transitions. [2022-11-16 12:21:13,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 630 flow [2022-11-16 12:21:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:21:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:21:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 484 transitions. [2022-11-16 12:21:13,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-11-16 12:21:13,181 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 484 transitions. [2022-11-16 12:21:13,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 484 transitions. [2022-11-16 12:21:13,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:13,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 484 transitions. [2022-11-16 12:21:13,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.14285714285714) internal successors, (484), 7 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,185 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,185 INFO L175 Difference]: Start difference. First operand has 107 places, 90 transitions, 416 flow. Second operand 7 states and 484 transitions. [2022-11-16 12:21:13,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 630 flow [2022-11-16 12:21:13,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 105 transitions, 598 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 12:21:13,193 INFO L231 Difference]: Finished difference. Result has 103 places, 86 transitions, 379 flow [2022-11-16 12:21:13,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=379, PETRI_PLACES=103, PETRI_TRANSITIONS=86} [2022-11-16 12:21:13,194 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 33 predicate places. [2022-11-16 12:21:13,194 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 86 transitions, 379 flow [2022-11-16 12:21:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:13,195 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] [2022-11-16 12:21:13,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:13,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:13,402 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash -365327580, now seen corresponding path program 1 times [2022-11-16 12:21:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190721531] [2022-11-16 12:21:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:13,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:13,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:13,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190721531] [2022-11-16 12:21:13,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190721531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:13,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:13,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:21:13,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517478618] [2022-11-16 12:21:13,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:13,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:21:13,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:13,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:21:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:21:13,456 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-16 12:21:13,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 86 transitions, 379 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:13,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-16 12:21:13,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:13,822 INFO L130 PetriNetUnfolder]: 456/1410 cut-off events. [2022-11-16 12:21:13,823 INFO L131 PetriNetUnfolder]: For 2915/3117 co-relation queries the response was YES. [2022-11-16 12:21:13,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3760 conditions, 1410 events. 456/1410 cut-off events. For 2915/3117 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11777 event pairs, 228 based on Foata normal form. 28/1093 useless extension candidates. Maximal degree in co-relation 3574. Up to 716 conditions per place. [2022-11-16 12:21:13,839 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 67 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2022-11-16 12:21:13,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 128 transitions, 839 flow [2022-11-16 12:21:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:21:13,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:21:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2022-11-16 12:21:13,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8113636363636364 [2022-11-16 12:21:13,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2022-11-16 12:21:13,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2022-11-16 12:21:13,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:13,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2022-11-16 12:21:13,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,847 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,848 INFO L175 Difference]: Start difference. First operand has 103 places, 86 transitions, 379 flow. Second operand 5 states and 357 transitions. [2022-11-16 12:21:13,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 128 transitions, 839 flow [2022-11-16 12:21:13,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 128 transitions, 825 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:21:13,856 INFO L231 Difference]: Finished difference. Result has 105 places, 89 transitions, 395 flow [2022-11-16 12:21:13,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=395, PETRI_PLACES=105, PETRI_TRANSITIONS=89} [2022-11-16 12:21:13,857 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 35 predicate places. [2022-11-16 12:21:13,858 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 89 transitions, 395 flow [2022-11-16 12:21:13,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:13,859 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] [2022-11-16 12:21:13,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:21:13,859 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash -328099202, now seen corresponding path program 1 times [2022-11-16 12:21:13,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:13,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387270615] [2022-11-16 12:21:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:13,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:21:14,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:14,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387270615] [2022-11-16 12:21:14,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387270615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:14,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811856739] [2022-11-16 12:21:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:14,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:14,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:14,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:14,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:21:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:21:14,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:21:14,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:21:14,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811856739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:14,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:14,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:21:14,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5528376] [2022-11-16 12:21:14,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:14,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:21:14,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:21:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:21:14,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-16 12:21:14,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 89 transitions, 395 flow. Second operand has 12 states, 12 states have (on average 66.83333333333333) internal successors, (802), 12 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:14,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:14,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-16 12:21:14,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:15,121 INFO L130 PetriNetUnfolder]: 992/2924 cut-off events. [2022-11-16 12:21:15,122 INFO L131 PetriNetUnfolder]: For 6212/6354 co-relation queries the response was YES. [2022-11-16 12:21:15,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8504 conditions, 2924 events. 992/2924 cut-off events. For 6212/6354 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26691 event pairs, 83 based on Foata normal form. 102/2663 useless extension candidates. Maximal degree in co-relation 8321. Up to 442 conditions per place. [2022-11-16 12:21:15,149 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 224 selfloop transitions, 18 changer transitions 0/299 dead transitions. [2022-11-16 12:21:15,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 299 transitions, 2531 flow [2022-11-16 12:21:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:21:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:21:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1258 transitions. [2022-11-16 12:21:15,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7941919191919192 [2022-11-16 12:21:15,154 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1258 transitions. [2022-11-16 12:21:15,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1258 transitions. [2022-11-16 12:21:15,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:15,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1258 transitions. [2022-11-16 12:21:15,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.88888888888889) internal successors, (1258), 18 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:15,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:15,165 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:15,165 INFO L175 Difference]: Start difference. First operand has 105 places, 89 transitions, 395 flow. Second operand 18 states and 1258 transitions. [2022-11-16 12:21:15,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 299 transitions, 2531 flow [2022-11-16 12:21:15,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 299 transitions, 2529 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:21:15,181 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 499 flow [2022-11-16 12:21:15,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=499, PETRI_PLACES=125, PETRI_TRANSITIONS=101} [2022-11-16 12:21:15,185 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 55 predicate places. [2022-11-16 12:21:15,185 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 499 flow [2022-11-16 12:21:15,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.83333333333333) internal successors, (802), 12 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:15,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:15,186 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] [2022-11-16 12:21:15,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:15,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:21:15,392 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1581140375, now seen corresponding path program 1 times [2022-11-16 12:21:15,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:15,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424774596] [2022-11-16 12:21:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:15,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:21:15,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424774596] [2022-11-16 12:21:15,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424774596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:15,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112149636] [2022-11-16 12:21:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:15,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:15,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:15,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:15,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:21:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:15,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:21:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:21:15,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:21:15,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112149636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:15,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:21:15,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:21:15,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033105545] [2022-11-16 12:21:15,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:15,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:21:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:21:15,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:21:15,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-16 12:21:15,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 101 transitions, 499 flow. Second operand has 6 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:15,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:15,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-16 12:21:15,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:16,370 INFO L130 PetriNetUnfolder]: 907/2684 cut-off events. [2022-11-16 12:21:16,370 INFO L131 PetriNetUnfolder]: For 6506/6648 co-relation queries the response was YES. [2022-11-16 12:21:16,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8426 conditions, 2684 events. 907/2684 cut-off events. For 6506/6648 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24565 event pairs, 163 based on Foata normal form. 128/2370 useless extension candidates. Maximal degree in co-relation 8240. Up to 805 conditions per place. [2022-11-16 12:21:16,394 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 84 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2022-11-16 12:21:16,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 152 transitions, 1098 flow [2022-11-16 12:21:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:21:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:21:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2022-11-16 12:21:16,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7938311688311688 [2022-11-16 12:21:16,397 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2022-11-16 12:21:16,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2022-11-16 12:21:16,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:16,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2022-11-16 12:21:16,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:16,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:16,400 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:16,401 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 499 flow. Second operand 7 states and 489 transitions. [2022-11-16 12:21:16,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 152 transitions, 1098 flow [2022-11-16 12:21:16,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1066 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 12:21:16,415 INFO L231 Difference]: Finished difference. Result has 121 places, 97 transitions, 462 flow [2022-11-16 12:21:16,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=121, PETRI_TRANSITIONS=97} [2022-11-16 12:21:16,416 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 51 predicate places. [2022-11-16 12:21:16,416 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 97 transitions, 462 flow [2022-11-16 12:21:16,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:16,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:16,417 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:16,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:16,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:16,624 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:16,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1040659810, now seen corresponding path program 2 times [2022-11-16 12:21:16,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:16,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340927159] [2022-11-16 12:21:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:16,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:16,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340927159] [2022-11-16 12:21:16,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340927159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:16,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793771171] [2022-11-16 12:21:16,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:21:16,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:16,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:16,734 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:16,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:21:16,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:21:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:21:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:16,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:17,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793771171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:17,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:17,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 12:21:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793014306] [2022-11-16 12:21:17,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:17,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:21:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:21:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:21:17,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-16 12:21:17,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 97 transitions, 462 flow. Second operand has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:17,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:17,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-16 12:21:17,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:17,642 INFO L130 PetriNetUnfolder]: 282/2370 cut-off events. [2022-11-16 12:21:17,642 INFO L131 PetriNetUnfolder]: For 5810/5891 co-relation queries the response was YES. [2022-11-16 12:21:17,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5877 conditions, 2370 events. 282/2370 cut-off events. For 5810/5891 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 20149 event pairs, 20 based on Foata normal form. 263/2467 useless extension candidates. Maximal degree in co-relation 5526. Up to 230 conditions per place. [2022-11-16 12:21:17,668 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 33 selfloop transitions, 46 changer transitions 0/156 dead transitions. [2022-11-16 12:21:17,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 156 transitions, 1024 flow [2022-11-16 12:21:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:21:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 12:21:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 932 transitions. [2022-11-16 12:21:17,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8825757575757576 [2022-11-16 12:21:17,675 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 932 transitions. [2022-11-16 12:21:17,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 932 transitions. [2022-11-16 12:21:17,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:17,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 932 transitions. [2022-11-16 12:21:17,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 77.66666666666667) internal successors, (932), 12 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:17,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:17,688 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:17,688 INFO L175 Difference]: Start difference. First operand has 121 places, 97 transitions, 462 flow. Second operand 12 states and 932 transitions. [2022-11-16 12:21:17,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 156 transitions, 1024 flow [2022-11-16 12:21:17,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 156 transitions, 1010 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:21:17,714 INFO L231 Difference]: Finished difference. Result has 137 places, 136 transitions, 1044 flow [2022-11-16 12:21:17,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1044, PETRI_PLACES=137, PETRI_TRANSITIONS=136} [2022-11-16 12:21:17,716 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 67 predicate places. [2022-11-16 12:21:17,716 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 136 transitions, 1044 flow [2022-11-16 12:21:17,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:17,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:17,718 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:17,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:17,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:21:17,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash -653292795, now seen corresponding path program 2 times [2022-11-16 12:21:17,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:17,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657078165] [2022-11-16 12:21:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:17,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:18,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657078165] [2022-11-16 12:21:18,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657078165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301836831] [2022-11-16 12:21:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:21:18,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:18,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:18,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:21:18,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:21:18,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:18,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:21:18,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 12:21:18,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 12:21:18,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301836831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:18,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:18,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-16 12:21:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578428772] [2022-11-16 12:21:18,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:21:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:21:18,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:21:18,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-16 12:21:18,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 136 transitions, 1044 flow. Second operand has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:18,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:18,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-16 12:21:18,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:21,115 INFO L130 PetriNetUnfolder]: 3525/9775 cut-off events. [2022-11-16 12:21:21,116 INFO L131 PetriNetUnfolder]: For 33003/33013 co-relation queries the response was YES. [2022-11-16 12:21:21,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29728 conditions, 9775 events. 3525/9775 cut-off events. For 33003/33013 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 98015 event pairs, 412 based on Foata normal form. 312/8363 useless extension candidates. Maximal degree in co-relation 28980. Up to 1557 conditions per place. [2022-11-16 12:21:21,221 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 343 selfloop transitions, 23 changer transitions 10/426 dead transitions. [2022-11-16 12:21:21,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 426 transitions, 4804 flow [2022-11-16 12:21:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:21:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 12:21:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1401 transitions. [2022-11-16 12:21:21,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7236570247933884 [2022-11-16 12:21:21,227 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1401 transitions. [2022-11-16 12:21:21,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1401 transitions. [2022-11-16 12:21:21,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:21,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1401 transitions. [2022-11-16 12:21:21,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 63.68181818181818) internal successors, (1401), 22 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:21,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:21,237 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:21,238 INFO L175 Difference]: Start difference. First operand has 137 places, 136 transitions, 1044 flow. Second operand 22 states and 1401 transitions. [2022-11-16 12:21:21,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 426 transitions, 4804 flow [2022-11-16 12:21:21,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 426 transitions, 4314 flow, removed 241 selfloop flow, removed 4 redundant places. [2022-11-16 12:21:21,302 INFO L231 Difference]: Finished difference. Result has 154 places, 140 transitions, 1001 flow [2022-11-16 12:21:21,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1001, PETRI_PLACES=154, PETRI_TRANSITIONS=140} [2022-11-16 12:21:21,303 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-11-16 12:21:21,303 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 140 transitions, 1001 flow [2022-11-16 12:21:21,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:21,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:21,305 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:21,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:21,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:21:21,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1034121636, now seen corresponding path program 2 times [2022-11-16 12:21:21,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:21,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136792070] [2022-11-16 12:21:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:21,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:21,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136792070] [2022-11-16 12:21:21,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136792070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584295367] [2022-11-16 12:21:21,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:21:21,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:21,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:21,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:21,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:21:21,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:21:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:21,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:21:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-16 12:21:22,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-16 12:21:22,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584295367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:22,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:22,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-16 12:21:22,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679359499] [2022-11-16 12:21:22,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:22,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:21:22,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:21:22,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:21:22,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-16 12:21:22,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 140 transitions, 1001 flow. Second operand has 16 states, 16 states have (on average 61.4375) internal successors, (983), 16 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:22,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:22,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-16 12:21:22,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:25,369 INFO L130 PetriNetUnfolder]: 5337/13271 cut-off events. [2022-11-16 12:21:25,369 INFO L131 PetriNetUnfolder]: For 35738/36252 co-relation queries the response was YES. [2022-11-16 12:21:25,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40987 conditions, 13271 events. 5337/13271 cut-off events. For 35738/36252 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 137599 event pairs, 168 based on Foata normal form. 748/12891 useless extension candidates. Maximal degree in co-relation 40486. Up to 1334 conditions per place. [2022-11-16 12:21:25,475 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 768 selfloop transitions, 23 changer transitions 0/844 dead transitions. [2022-11-16 12:21:25,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 844 transitions, 9894 flow [2022-11-16 12:21:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:21:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 12:21:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1415 transitions. [2022-11-16 12:21:25,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7308884297520661 [2022-11-16 12:21:25,479 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1415 transitions. [2022-11-16 12:21:25,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1415 transitions. [2022-11-16 12:21:25,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:25,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1415 transitions. [2022-11-16 12:21:25,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.31818181818181) internal successors, (1415), 22 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:25,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:25,489 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:25,489 INFO L175 Difference]: Start difference. First operand has 154 places, 140 transitions, 1001 flow. Second operand 22 states and 1415 transitions. [2022-11-16 12:21:25,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 844 transitions, 9894 flow [2022-11-16 12:21:25,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 844 transitions, 9802 flow, removed 18 selfloop flow, removed 19 redundant places. [2022-11-16 12:21:25,598 INFO L231 Difference]: Finished difference. Result has 156 places, 144 transitions, 1006 flow [2022-11-16 12:21:25,599 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1006, PETRI_PLACES=156, PETRI_TRANSITIONS=144} [2022-11-16 12:21:25,600 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 86 predicate places. [2022-11-16 12:21:25,600 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 144 transitions, 1006 flow [2022-11-16 12:21:25,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.4375) internal successors, (983), 16 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:25,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:25,601 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:25,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:25,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:21:25,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash 804847074, now seen corresponding path program 3 times [2022-11-16 12:21:25,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923366228] [2022-11-16 12:21:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:25,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:26,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:26,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923366228] [2022-11-16 12:21:26,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923366228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:26,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75695865] [2022-11-16 12:21:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:21:26,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:26,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:26,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:26,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:21:26,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:21:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:26,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:21:26,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75695865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:26,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:26,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-16 12:21:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789964920] [2022-11-16 12:21:26,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:26,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:21:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:21:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:21:26,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-16 12:21:26,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 144 transitions, 1006 flow. Second operand has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:26,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:26,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-16 12:21:26,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:28,823 INFO L130 PetriNetUnfolder]: 939/7882 cut-off events. [2022-11-16 12:21:28,823 INFO L131 PetriNetUnfolder]: For 61080/61343 co-relation queries the response was YES. [2022-11-16 12:21:28,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20562 conditions, 7882 events. 939/7882 cut-off events. For 61080/61343 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 81326 event pairs, 24 based on Foata normal form. 648/8515 useless extension candidates. Maximal degree in co-relation 19916. Up to 838 conditions per place. [2022-11-16 12:21:29,033 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 56 selfloop transitions, 206 changer transitions 1/348 dead transitions. [2022-11-16 12:21:29,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 348 transitions, 3143 flow [2022-11-16 12:21:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:21:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:21:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1868 transitions. [2022-11-16 12:21:29,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.884469696969697 [2022-11-16 12:21:29,038 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1868 transitions. [2022-11-16 12:21:29,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1868 transitions. [2022-11-16 12:21:29,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:29,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1868 transitions. [2022-11-16 12:21:29,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 77.83333333333333) internal successors, (1868), 24 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:29,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 88.0) internal successors, (2200), 25 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:29,049 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 88.0) internal successors, (2200), 25 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:29,050 INFO L175 Difference]: Start difference. First operand has 156 places, 144 transitions, 1006 flow. Second operand 24 states and 1868 transitions. [2022-11-16 12:21:29,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 348 transitions, 3143 flow [2022-11-16 12:21:29,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 348 transitions, 3091 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-11-16 12:21:29,096 INFO L231 Difference]: Finished difference. Result has 186 places, 304 transitions, 3409 flow [2022-11-16 12:21:29,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3409, PETRI_PLACES=186, PETRI_TRANSITIONS=304} [2022-11-16 12:21:29,097 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 116 predicate places. [2022-11-16 12:21:29,098 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 304 transitions, 3409 flow [2022-11-16 12:21:29,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:29,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:29,100 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:29,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:29,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:29,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash 387755746, now seen corresponding path program 4 times [2022-11-16 12:21:29,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:29,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178086498] [2022-11-16 12:21:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:29,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:30,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:30,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178086498] [2022-11-16 12:21:30,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178086498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:30,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130926427] [2022-11-16 12:21:30,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:21:30,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:30,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:30,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:21:30,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:21:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:21:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:30,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130926427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:31,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:31,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-16 12:21:31,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488274076] [2022-11-16 12:21:31,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:31,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:21:31,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:21:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:21:31,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-16 12:21:31,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 304 transitions, 3409 flow. Second operand has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:31,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:31,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-16 12:21:31,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:21:39,173 INFO L130 PetriNetUnfolder]: 2453/20592 cut-off events. [2022-11-16 12:21:39,173 INFO L131 PetriNetUnfolder]: For 686257/687054 co-relation queries the response was YES. [2022-11-16 12:21:39,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58246 conditions, 20592 events. 2453/20592 cut-off events. For 686257/687054 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 232232 event pairs, 24 based on Foata normal form. 1320/21897 useless extension candidates. Maximal degree in co-relation 56888. Up to 2907 conditions per place. [2022-11-16 12:21:39,380 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 104 selfloop transitions, 822 changer transitions 1/1012 dead transitions. [2022-11-16 12:21:39,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1012 transitions, 13514 flow [2022-11-16 12:21:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:21:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-16 12:21:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3740 transitions. [2022-11-16 12:21:39,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8854166666666666 [2022-11-16 12:21:39,387 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3740 transitions. [2022-11-16 12:21:39,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3740 transitions. [2022-11-16 12:21:39,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:21:39,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3740 transitions. [2022-11-16 12:21:39,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 77.91666666666667) internal successors, (3740), 48 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:39,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 88.0) internal successors, (4312), 49 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:39,407 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 88.0) internal successors, (4312), 49 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:39,407 INFO L175 Difference]: Start difference. First operand has 186 places, 304 transitions, 3409 flow. Second operand 48 states and 3740 transitions. [2022-11-16 12:21:39,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1012 transitions, 13514 flow [2022-11-16 12:21:39,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1012 transitions, 10784 flow, removed 1336 selfloop flow, removed 5 redundant places. [2022-11-16 12:21:39,697 INFO L231 Difference]: Finished difference. Result has 274 places, 920 transitions, 12262 flow [2022-11-16 12:21:39,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=12262, PETRI_PLACES=274, PETRI_TRANSITIONS=920} [2022-11-16 12:21:39,699 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 204 predicate places. [2022-11-16 12:21:39,699 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 920 transitions, 12262 flow [2022-11-16 12:21:39,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:39,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:21:39,702 INFO L209 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:39,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:39,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:39,908 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:21:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1740336926, now seen corresponding path program 5 times [2022-11-16 12:21:39,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:39,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874494096] [2022-11-16 12:21:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:39,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:43,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:43,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874494096] [2022-11-16 12:21:43,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874494096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:43,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218448916] [2022-11-16 12:21:43,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:21:43,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:43,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:43,429 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:43,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:21:43,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-16 12:21:43,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 12:21:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:44,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:48,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218448916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:48,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:48,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-16 12:21:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633687389] [2022-11-16 12:21:48,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:48,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-16 12:21:48,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-16 12:21:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 12:21:48,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-16 12:21:48,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 920 transitions, 12262 flow. Second operand has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:48,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:21:48,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-16 12:21:48,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:20,890 INFO L130 PetriNetUnfolder]: 6679/55057 cut-off events. [2022-11-16 12:22:20,890 INFO L131 PetriNetUnfolder]: For 6086820/6088393 co-relation queries the response was YES. [2022-11-16 12:22:21,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158830 conditions, 55057 events. 6679/55057 cut-off events. For 6086820/6088393 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 664276 event pairs, 24 based on Foata normal form. 2685/57726 useless extension candidates. Maximal degree in co-relation 156067. Up to 7507 conditions per place. [2022-11-16 12:22:21,800 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 200 selfloop transitions, 3214 changer transitions 1/3500 dead transitions. [2022-11-16 12:22:21,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 3500 transitions, 51235 flow [2022-11-16 12:22:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 12:22:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-16 12:22:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 7484 transitions. [2022-11-16 12:22:21,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8858901515151515 [2022-11-16 12:22:21,817 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 7484 transitions. [2022-11-16 12:22:21,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 7484 transitions. [2022-11-16 12:22:21,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:21,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 7484 transitions. [2022-11-16 12:22:21,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 77.95833333333333) internal successors, (7484), 96 states have internal predecessors, (7484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:21,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 88.0) internal successors, (8536), 97 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:21,850 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 88.0) internal successors, (8536), 97 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:21,851 INFO L175 Difference]: Start difference. First operand has 274 places, 920 transitions, 12262 flow. Second operand 96 states and 7484 transitions. [2022-11-16 12:22:21,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 3500 transitions, 51235 flow [2022-11-16 12:22:24,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 3500 transitions, 40313 flow, removed 5296 selfloop flow, removed 11 redundant places. [2022-11-16 12:22:24,335 INFO L231 Difference]: Finished difference. Result has 452 places, 3312 transitions, 46431 flow [2022-11-16 12:22:24,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=11226, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=46431, PETRI_PLACES=452, PETRI_TRANSITIONS=3312} [2022-11-16 12:22:24,336 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 382 predicate places. [2022-11-16 12:22:24,336 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 3312 transitions, 46431 flow [2022-11-16 12:22:24,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:24,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:24,338 INFO L209 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:24,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:24,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a45ca71-4b80-4a33-a4f3-5f81f030c412/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:22:24,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 12:22:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1159091426, now seen corresponding path program 6 times [2022-11-16 12:22:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:24,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958652447] [2022-11-16 12:22:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:24,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat