./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.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_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/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_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/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_10b57164-9424-4053-878b-5e15879ee2d0/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 d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- 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 11:02:20,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:02:20,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:02:20,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:02:20,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:02:20,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:02:20,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:02:20,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:02:20,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:02:20,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:02:20,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:02:20,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:02:20,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:02:20,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:02:20,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:02:20,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:02:20,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:02:20,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:02:20,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:02:20,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:02:20,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:02:20,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:02:20,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:02:20,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:02:20,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:02:20,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:02:20,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:02:20,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:02:20,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:02:20,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:02:20,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:02:20,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:02:20,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:02:20,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:02:20,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:02:20,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:02:20,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:02:20,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:02:20,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:02:20,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:02:20,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:02:20,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:02:20,498 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:02:20,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:02:20,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:02:20,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:02:20,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:02:20,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:02:20,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:02:20,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:02:20,502 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:02:20,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:02:20,502 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:02:20,503 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:02:20,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:02:20,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:02:20,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:02:20,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:02:20,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:02:20,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:02:20,505 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:02:20,505 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:02:20,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:02:20,506 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:02:20,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:02:20,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:02:20,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:02:20,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:02:20,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:02:20,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:02:20,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:02:20,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:02:20,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:02:20,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:02:20,510 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:02:20,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:02:20,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:02:20,511 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_10b57164-9424-4053-878b-5e15879ee2d0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-11-16 11:02:20,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:02:20,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:02:20,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:02:20,829 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:02:20,830 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:02:20,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-11-16 11:02:20,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/data/c3200be0b/e12c982506a34fa78337a0914df37457/FLAG9786def73 [2022-11-16 11:02:21,441 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:02:21,447 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-11-16 11:02:21,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/data/c3200be0b/e12c982506a34fa78337a0914df37457/FLAG9786def73 [2022-11-16 11:02:21,759 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/data/c3200be0b/e12c982506a34fa78337a0914df37457 [2022-11-16 11:02:21,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:02:21,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:02:21,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:02:21,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:02:21,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:02:21,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:02:21" (1/1) ... [2022-11-16 11:02:21,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d5a57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:21, skipping insertion in model container [2022-11-16 11:02:21,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:02:21" (1/1) ... [2022-11-16 11:02:21,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:02:21,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:02:22,053 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_10b57164-9424-4053-878b-5e15879ee2d0/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-11-16 11:02:22,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:02:22,072 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:02:22,104 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_10b57164-9424-4053-878b-5e15879ee2d0/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-11-16 11:02:22,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:02:22,127 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:02:22,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22 WrapperNode [2022-11-16 11:02:22,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:02:22,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:02:22,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:02:22,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:02:22,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,193 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 341 [2022-11-16 11:02:22,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:02:22,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:02:22,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:02:22,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:02:22,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:02:22,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:02:22,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:02:22,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:02:22,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (1/1) ... [2022-11-16 11:02:22,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:02:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:02:22,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:02:22,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:02:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:02:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:02:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:02:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:02:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:02:22,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:02:22,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:02:22,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:02:22,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:02:22,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:02:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:02:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:02:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:02:22,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:02:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:02:22,376 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 11:02:22,507 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:02:22,509 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:02:23,361 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:02:23,380 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:02:23,380 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:02:23,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:02:23 BoogieIcfgContainer [2022-11-16 11:02:23,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:02:23,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:02:23,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:02:23,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:02:23,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:02:21" (1/3) ... [2022-11-16 11:02:23,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f201323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:02:23, skipping insertion in model container [2022-11-16 11:02:23,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:02:22" (2/3) ... [2022-11-16 11:02:23,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f201323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:02:23, skipping insertion in model container [2022-11-16 11:02:23,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:02:23" (3/3) ... [2022-11-16 11:02:23,395 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2022-11-16 11:02:23,407 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:02:23,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:02:23,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2022-11-16 11:02:23,420 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:02:23,581 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:02:23,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 434 places, 459 transitions, 942 flow [2022-11-16 11:02:23,997 INFO L130 PetriNetUnfolder]: 35/456 cut-off events. [2022-11-16 11:02:23,997 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:02:24,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 456 events. 35/456 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1067 event pairs, 0 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 341. Up to 3 conditions per place. [2022-11-16 11:02:24,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 434 places, 459 transitions, 942 flow [2022-11-16 11:02:24,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 427 transitions, 869 flow [2022-11-16 11:02:24,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:02:24,071 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;@3547fe66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:02:24,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2022-11-16 11:02:24,083 INFO L130 PetriNetUnfolder]: 3/70 cut-off events. [2022-11-16 11:02:24,083 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:02:24,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:02:24,085 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:24,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2022-11-16 11:02:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1777577551, now seen corresponding path program 1 times [2022-11-16 11:02:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:02:24,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713272978] [2022-11-16 11:02:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:24,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:02:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:24,750 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 11:02:24,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:02:24,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713272978] [2022-11-16 11:02:24,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713272978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:24,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:02:24,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:02:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483249695] [2022-11-16 11:02:24,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:24,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:02:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:02:24,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:02:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:02:24,852 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 459 [2022-11-16 11:02:24,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 427 transitions, 869 flow. Second operand has 4 states, 4 states have (on average 397.5) internal successors, (1590), 4 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 11:02:24,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:02:24,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 459 [2022-11-16 11:02:24,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:02:25,425 INFO L130 PetriNetUnfolder]: 29/718 cut-off events. [2022-11-16 11:02:25,425 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-16 11:02:25,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 718 events. 29/718 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2911 event pairs, 0 based on Foata normal form. 36/640 useless extension candidates. Maximal degree in co-relation 618. Up to 44 conditions per place. [2022-11-16 11:02:25,442 INFO L137 encePairwiseOnDemand]: 421/459 looper letters, 58 selfloop transitions, 14 changer transitions 6/440 dead transitions. [2022-11-16 11:02:25,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 440 transitions, 1054 flow [2022-11-16 11:02:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:02:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:02:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2088 transitions. [2022-11-16 11:02:25,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9098039215686274 [2022-11-16 11:02:25,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2088 transitions. [2022-11-16 11:02:25,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2088 transitions. [2022-11-16 11:02:25,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:02:25,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2088 transitions. [2022-11-16 11:02:25,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 417.6) internal successors, (2088), 5 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states 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 11:02:25,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 459.0) internal successors, (2754), 6 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states 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 11:02:25,514 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 459.0) internal successors, (2754), 6 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states 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 11:02:25,516 INFO L175 Difference]: Start difference. First operand has 404 places, 427 transitions, 869 flow. Second operand 5 states and 2088 transitions. [2022-11-16 11:02:25,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 440 transitions, 1054 flow [2022-11-16 11:02:25,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 440 transitions, 1036 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:02:25,544 INFO L231 Difference]: Finished difference. Result has 406 places, 414 transitions, 916 flow [2022-11-16 11:02:25,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=916, PETRI_PLACES=406, PETRI_TRANSITIONS=414} [2022-11-16 11:02:25,555 INFO L288 CegarLoopForPetriNet]: 404 programPoint places, 2 predicate places. [2022-11-16 11:02:25,555 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 414 transitions, 916 flow [2022-11-16 11:02:25,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 397.5) internal successors, (1590), 4 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 11:02:25,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:02:25,558 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:25,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:02:25,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2022-11-16 11:02:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1218740394, now seen corresponding path program 1 times [2022-11-16 11:02:25,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:02:25,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972826501] [2022-11-16 11:02:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:25,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:02:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:25,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:02:25,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972826501] [2022-11-16 11:02:25,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972826501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:02:25,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220135232] [2022-11-16 11:02:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:25,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:02:25,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:02:25,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:02:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:26,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:02:26,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:26,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:26,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220135232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:02:26,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:02:26,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:02:26,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787694707] [2022-11-16 11:02:26,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:02:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:02:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:02:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:02:26,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:02:26,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 459 [2022-11-16 11:02:26,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 414 transitions, 916 flow. Second operand has 12 states, 12 states have (on average 398.6666666666667) internal successors, (4784), 12 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states 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 11:02:26,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:02:26,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 459 [2022-11-16 11:02:26,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:02:27,520 INFO L130 PetriNetUnfolder]: 71/1645 cut-off events. [2022-11-16 11:02:27,521 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-16 11:02:27,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1923 conditions, 1645 events. 71/1645 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 10231 event pairs, 0 based on Foata normal form. 9/1399 useless extension candidates. Maximal degree in co-relation 1176. Up to 35 conditions per place. [2022-11-16 11:02:27,546 INFO L137 encePairwiseOnDemand]: 436/459 looper letters, 109 selfloop transitions, 62 changer transitions 0/533 dead transitions. [2022-11-16 11:02:27,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 533 transitions, 1598 flow [2022-11-16 11:02:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:02:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:02:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 7308 transitions. [2022-11-16 11:02:27,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8845315904139434 [2022-11-16 11:02:27,563 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 7308 transitions. [2022-11-16 11:02:27,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 7308 transitions. [2022-11-16 11:02:27,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:02:27,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 7308 transitions. [2022-11-16 11:02:27,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 406.0) internal successors, (7308), 18 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states 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 11:02:27,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 459.0) internal successors, (8721), 19 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states 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 11:02:27,613 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 459.0) internal successors, (8721), 19 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states 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 11:02:27,613 INFO L175 Difference]: Start difference. First operand has 406 places, 414 transitions, 916 flow. Second operand 18 states and 7308 transitions. [2022-11-16 11:02:27,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 533 transitions, 1598 flow [2022-11-16 11:02:27,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 533 transitions, 1590 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:02:27,628 INFO L231 Difference]: Finished difference. Result has 420 places, 456 transitions, 1278 flow [2022-11-16 11:02:27,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1278, PETRI_PLACES=420, PETRI_TRANSITIONS=456} [2022-11-16 11:02:27,630 INFO L288 CegarLoopForPetriNet]: 404 programPoint places, 16 predicate places. [2022-11-16 11:02:27,630 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 456 transitions, 1278 flow [2022-11-16 11:02:27,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 398.6666666666667) internal successors, (4784), 12 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states 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 11:02:27,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:02:27,634 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:27,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:27,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:27,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2022-11-16 11:02:27,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:27,842 INFO L85 PathProgramCache]: Analyzing trace with hash -873752407, now seen corresponding path program 1 times [2022-11-16 11:02:27,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:02:27,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130361787] [2022-11-16 11:02:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:27,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:02:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:27,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:02:27,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130361787] [2022-11-16 11:02:27,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130361787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:02:27,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390822985] [2022-11-16 11:02:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:27,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:27,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:02:27,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:02:27,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:02:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:02:28,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:28,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:02:28,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390822985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:28,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:02:28,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:02:28,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496493512] [2022-11-16 11:02:28,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:02:28,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:02:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:02:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:02:28,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 459 [2022-11-16 11:02:28,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 456 transitions, 1278 flow. Second operand has 6 states, 6 states have (on average 398.3333333333333) internal successors, (2390), 6 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states 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 11:02:28,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:02:28,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 459 [2022-11-16 11:02:28,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:02:29,013 INFO L130 PetriNetUnfolder]: 71/1633 cut-off events. [2022-11-16 11:02:29,013 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2022-11-16 11:02:29,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1979 conditions, 1633 events. 71/1633 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 10134 event pairs, 0 based on Foata normal form. 12/1390 useless extension candidates. Maximal degree in co-relation 1538. Up to 68 conditions per place. [2022-11-16 11:02:29,044 INFO L137 encePairwiseOnDemand]: 442/459 looper letters, 59 selfloop transitions, 43 changer transitions 0/464 dead transitions. [2022-11-16 11:02:29,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 464 transitions, 1453 flow [2022-11-16 11:02:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:02:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:02:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2844 transitions. [2022-11-16 11:02:29,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8851540616246498 [2022-11-16 11:02:29,054 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2844 transitions. [2022-11-16 11:02:29,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2844 transitions. [2022-11-16 11:02:29,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:02:29,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2844 transitions. [2022-11-16 11:02:29,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 406.2857142857143) internal successors, (2844), 7 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states 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 11:02:29,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 11:02:29,073 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states 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 11:02:29,074 INFO L175 Difference]: Start difference. First operand has 420 places, 456 transitions, 1278 flow. Second operand 7 states and 2844 transitions. [2022-11-16 11:02:29,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 464 transitions, 1453 flow [2022-11-16 11:02:29,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 464 transitions, 1337 flow, removed 41 selfloop flow, removed 5 redundant places. [2022-11-16 11:02:29,091 INFO L231 Difference]: Finished difference. Result has 414 places, 444 transitions, 1167 flow [2022-11-16 11:02:29,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1167, PETRI_PLACES=414, PETRI_TRANSITIONS=444} [2022-11-16 11:02:29,095 INFO L288 CegarLoopForPetriNet]: 404 programPoint places, 10 predicate places. [2022-11-16 11:02:29,095 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 444 transitions, 1167 flow [2022-11-16 11:02:29,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 398.3333333333333) internal successors, (2390), 6 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states 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 11:02:29,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:02:29,097 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:29,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:29,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:29,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2022-11-16 11:02:29,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash -51002609, now seen corresponding path program 2 times [2022-11-16 11:02:29,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:02:29,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346477778] [2022-11-16 11:02:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:29,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:02:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:29,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:02:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346477778] [2022-11-16 11:02:29,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346477778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:02:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57036809] [2022-11-16 11:02:29,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:02:29,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:29,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:02:29,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:02:29,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:02:29,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:02:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:02:29,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:02:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:02:30,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:02:30,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57036809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:02:30,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:02:30,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 11:02:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118756148] [2022-11-16 11:02:30,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:02:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:02:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:02:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:02:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:02:30,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 459 [2022-11-16 11:02:30,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 444 transitions, 1167 flow. Second operand has 18 states, 18 states have (on average 365.6111111111111) internal successors, (6581), 18 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states 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 11:02:30,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:02:30,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 459 [2022-11-16 11:02:30,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:02:35,624 INFO L130 PetriNetUnfolder]: 1884/14010 cut-off events. [2022-11-16 11:02:35,625 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2022-11-16 11:02:35,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17613 conditions, 14010 events. 1884/14010 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 165852 event pairs, 1225 based on Foata normal form. 6/10936 useless extension candidates. Maximal degree in co-relation 14544. Up to 448 conditions per place. [2022-11-16 11:02:36,017 INFO L137 encePairwiseOnDemand]: 431/459 looper letters, 248 selfloop transitions, 97 changer transitions 0/673 dead transitions. [2022-11-16 11:02:36,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 673 transitions, 2452 flow [2022-11-16 11:02:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:02:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:02:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 18089 transitions. [2022-11-16 11:02:36,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8042772664621404 [2022-11-16 11:02:36,054 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 18089 transitions. [2022-11-16 11:02:36,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 18089 transitions. [2022-11-16 11:02:36,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:02:36,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 18089 transitions. [2022-11-16 11:02:36,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 369.16326530612247) internal successors, (18089), 49 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states 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 11:02:36,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 459.0) internal successors, (22950), 50 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states 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 11:02:36,148 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 459.0) internal successors, (22950), 50 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states 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 11:02:36,148 INFO L175 Difference]: Start difference. First operand has 414 places, 444 transitions, 1167 flow. Second operand 49 states and 18089 transitions. [2022-11-16 11:02:36,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 673 transitions, 2452 flow [2022-11-16 11:02:36,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 673 transitions, 2383 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:02:36,163 INFO L231 Difference]: Finished difference. Result has 460 places, 484 transitions, 1510 flow [2022-11-16 11:02:36,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1510, PETRI_PLACES=460, PETRI_TRANSITIONS=484} [2022-11-16 11:02:36,165 INFO L288 CegarLoopForPetriNet]: 404 programPoint places, 56 predicate places. [2022-11-16 11:02:36,166 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 484 transitions, 1510 flow [2022-11-16 11:02:36,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 365.6111111111111) internal successors, (6581), 18 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states 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 11:02:36,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:02:36,168 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:36,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b57164-9424-4053-878b-5e15879ee2d0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:36,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2022-11-16 11:02:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2060217344, now seen corresponding path program 1 times [2022-11-16 11:02:36,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:02:36,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642687797] [2022-11-16 11:02:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:36,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:02:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:36,787 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 11:02:36,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:02:36,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642687797] [2022-11-16 11:02:36,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642687797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:36,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:02:36,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:02:36,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809367672] [2022-11-16 11:02:36,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:36,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:02:36,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:02:36,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:02:36,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:02:36,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 459 [2022-11-16 11:02:36,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 484 transitions, 1510 flow. Second operand has 11 states, 11 states have (on average 341.3636363636364) internal successors, (3755), 11 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states 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 11:02:36,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:02:36,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 459 [2022-11-16 11:02:36,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:03:02,948 INFO L130 PetriNetUnfolder]: 20224/129292 cut-off events. [2022-11-16 11:03:02,948 INFO L131 PetriNetUnfolder]: For 1751/1751 co-relation queries the response was YES. [2022-11-16 11:03:03,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154604 conditions, 129292 events. 20224/129292 cut-off events. For 1751/1751 co-relation queries the response was YES. Maximal size of possible extension queue 2054. Compared 2183396 event pairs, 13594 based on Foata normal form. 0/100333 useless extension candidates. Maximal degree in co-relation 132487. Up to 10797 conditions per place. [2022-11-16 11:03:04,699 INFO L137 encePairwiseOnDemand]: 441/459 looper letters, 234 selfloop transitions, 35 changer transitions 0/604 dead transitions. [2022-11-16 11:03:04,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 604 transitions, 2531 flow [2022-11-16 11:03:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:03:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 11:03:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5896 transitions. [2022-11-16 11:03:04,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.755606817890555 [2022-11-16 11:03:04,715 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5896 transitions. [2022-11-16 11:03:04,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5896 transitions. [2022-11-16 11:03:04,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:03:04,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5896 transitions. [2022-11-16 11:03:04,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 346.8235294117647) internal successors, (5896), 17 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states 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 11:03:04,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 459.0) internal successors, (8262), 18 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states 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 11:03:04,755 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 459.0) internal successors, (8262), 18 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states 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 11:03:04,755 INFO L175 Difference]: Start difference. First operand has 460 places, 484 transitions, 1510 flow. Second operand 17 states and 5896 transitions. [2022-11-16 11:03:04,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 604 transitions, 2531 flow [2022-11-16 11:03:04,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 604 transitions, 2350 flow, removed 27 selfloop flow, removed 15 redundant places. [2022-11-16 11:03:04,773 INFO L231 Difference]: Finished difference. Result has 470 places, 498 transitions, 1589 flow [2022-11-16 11:03:04,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1589, PETRI_PLACES=470, PETRI_TRANSITIONS=498} [2022-11-16 11:03:04,778 INFO L288 CegarLoopForPetriNet]: 404 programPoint places, 66 predicate places. [2022-11-16 11:03:04,778 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 498 transitions, 1589 flow [2022-11-16 11:03:04,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 341.3636363636364) internal successors, (3755), 11 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states 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 11:03:04,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:03:04,780 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:04,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:03:04,781 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2022-11-16 11:03:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash -557770679, now seen corresponding path program 1 times [2022-11-16 11:03:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:04,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432841541] [2022-11-16 11:03:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:04,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:05,046 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 11:03:05,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:05,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432841541] [2022-11-16 11:03:05,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432841541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:05,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:05,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:03:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578339497] [2022-11-16 11:03:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:05,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:03:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:05,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:03:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:03:05,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 459 [2022-11-16 11:03:05,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 498 transitions, 1589 flow. Second operand has 8 states, 8 states have (on average 372.25) internal successors, (2978), 8 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states 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 11:03:05,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:03:05,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 459 [2022-11-16 11:03:05,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand