./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/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_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/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_fb09a36b-b1ac-454c-a32a-2dce54ea3492/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 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- 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 11:54:15,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:54:15,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:54:15,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:54:15,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:54:15,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:54:15,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:54:15,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:54:15,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:54:15,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:54:15,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:54:15,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:54:15,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:54:15,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:54:15,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:54:15,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:54:15,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:54:15,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:54:15,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:54:15,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:54:15,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:54:15,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:54:15,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:54:15,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:54:15,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:54:15,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:54:15,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:54:15,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:54:15,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:54:15,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:54:15,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:54:15,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:54:15,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:54:15,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:54:15,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:54:15,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:54:15,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:54:15,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:54:15,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:54:15,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:54:15,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:54:15,222 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:54:15,245 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:54:15,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:54:15,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:54:15,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:54:15,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:54:15,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:54:15,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:54:15,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:54:15,256 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:54:15,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:54:15,257 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:54:15,258 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:54:15,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:54:15,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:54:15,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:54:15,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:54:15,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:54:15,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:54:15,260 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:54:15,260 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:54:15,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:54:15,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:54:15,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:54:15,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:54:15,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:54:15,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:54:15,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:54:15,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:54:15,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:54:15,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:54:15,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:54:15,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:54:15,266 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:54:15,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:54:15,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:54:15,267 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_fb09a36b-b1ac-454c-a32a-2dce54ea3492/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2022-11-16 11:54:15,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:54:15,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:54:15,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:54:15,557 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:54:15,557 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:54:15,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2022-11-16 11:54:15,641 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/data/7568257e4/095352dc29264874bb3e930143409bca/FLAG6386e5478 [2022-11-16 11:54:16,281 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:54:16,282 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2022-11-16 11:54:16,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/data/7568257e4/095352dc29264874bb3e930143409bca/FLAG6386e5478 [2022-11-16 11:54:16,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/data/7568257e4/095352dc29264874bb3e930143409bca [2022-11-16 11:54:16,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:54:16,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:54:16,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:54:16,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:54:16,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:54:16,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:54:16" (1/1) ... [2022-11-16 11:54:16,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd525a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:16, skipping insertion in model container [2022-11-16 11:54:16,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:54:16" (1/1) ... [2022-11-16 11:54:16,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:54:16,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:54:17,415 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_fb09a36b-b1ac-454c-a32a-2dce54ea3492/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2022-11-16 11:54:17,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:54:17,487 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:54:17,538 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_fb09a36b-b1ac-454c-a32a-2dce54ea3492/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2022-11-16 11:54:17,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:54:17,605 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:54:17,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17 WrapperNode [2022-11-16 11:54:17,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:54:17,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:54:17,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:54:17,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:54:17,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,662 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 218 [2022-11-16 11:54:17,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:54:17,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:54:17,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:54:17,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:54:17,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,696 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:54:17,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:54:17,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:54:17,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:54:17,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (1/1) ... [2022-11-16 11:54:17,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:54:17,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:17,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:54:17,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:54:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:54:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:54:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-16 11:54:17,794 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-16 11:54:17,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:54:17,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:54:17,795 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-16 11:54:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-16 11:54:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:54:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:54:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:54:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:54:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:54:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:54:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:54:17,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:54:17,799 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 11:54:17,967 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:54:17,969 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:54:18,517 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:54:18,530 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:54:18,530 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-16 11:54:18,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:54:18 BoogieIcfgContainer [2022-11-16 11:54:18,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:54:18,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:54:18,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:54:18,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:54:18,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:54:16" (1/3) ... [2022-11-16 11:54:18,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485e6f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:54:18, skipping insertion in model container [2022-11-16 11:54:18,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:54:17" (2/3) ... [2022-11-16 11:54:18,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485e6f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:54:18, skipping insertion in model container [2022-11-16 11:54:18,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:54:18" (3/3) ... [2022-11-16 11:54:18,558 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2022-11-16 11:54:18,584 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:54:18,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:54:18,596 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-16 11:54:18,596 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:54:18,852 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 11:54:18,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 244 transitions, 510 flow [2022-11-16 11:54:19,136 INFO L130 PetriNetUnfolder]: 52/468 cut-off events. [2022-11-16 11:54:19,136 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2022-11-16 11:54:19,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 468 events. 52/468 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1913 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 233. Up to 8 conditions per place. [2022-11-16 11:54:19,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 244 transitions, 510 flow [2022-11-16 11:54:19,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 244 transitions, 510 flow [2022-11-16 11:54:19,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:54:19,197 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;@34f0987e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:54:19,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-16 11:54:19,217 INFO L130 PetriNetUnfolder]: 4/82 cut-off events. [2022-11-16 11:54:19,217 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:54:19,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:19,218 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] [2022-11-16 11:54:19,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:54:19,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash 537706274, now seen corresponding path program 1 times [2022-11-16 11:54:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:19,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841513961] [2022-11-16 11:54:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:19,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,800 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 11:54:19,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841513961] [2022-11-16 11:54:19,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841513961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:19,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:19,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037324862] [2022-11-16 11:54:19,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:19,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:19,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:19,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:19,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 244 [2022-11-16 11:54:19,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 244 transitions, 510 flow. Second operand has 4 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 0 states have call successors, (0), 0 states 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 11:54:19,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:19,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 244 [2022-11-16 11:54:19,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:20,026 INFO L130 PetriNetUnfolder]: 9/316 cut-off events. [2022-11-16 11:54:20,027 INFO L131 PetriNetUnfolder]: For 40/87 co-relation queries the response was YES. [2022-11-16 11:54:20,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 316 events. 9/316 cut-off events. For 40/87 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 915 event pairs, 0 based on Foata normal form. 46/328 useless extension candidates. Maximal degree in co-relation 212. Up to 15 conditions per place. [2022-11-16 11:54:20,033 INFO L137 encePairwiseOnDemand]: 221/244 looper letters, 14 selfloop transitions, 4 changer transitions 0/227 dead transitions. [2022-11-16 11:54:20,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 227 transitions, 512 flow [2022-11-16 11:54:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:54:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1083 transitions. [2022-11-16 11:54:20,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8877049180327868 [2022-11-16 11:54:20,055 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1083 transitions. [2022-11-16 11:54:20,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1083 transitions. [2022-11-16 11:54:20,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:20,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1083 transitions. [2022-11-16 11:54:20,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.6) internal successors, (1083), 5 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states 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 11:54:20,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 244.0) internal successors, (1464), 6 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states 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 11:54:20,076 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 244.0) internal successors, (1464), 6 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states 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 11:54:20,078 INFO L175 Difference]: Start difference. First operand has 226 places, 244 transitions, 510 flow. Second operand 5 states and 1083 transitions. [2022-11-16 11:54:20,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 227 transitions, 512 flow [2022-11-16 11:54:20,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 227 transitions, 512 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:54:20,089 INFO L231 Difference]: Finished difference. Result has 228 places, 225 transitions, 484 flow [2022-11-16 11:54:20,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=484, PETRI_PLACES=228, PETRI_TRANSITIONS=225} [2022-11-16 11:54:20,095 INFO L288 CegarLoopForPetriNet]: 226 programPoint places, 2 predicate places. [2022-11-16 11:54:20,095 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 225 transitions, 484 flow [2022-11-16 11:54:20,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 0 states have call successors, (0), 0 states 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 11:54:20,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:20,097 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:20,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:54:20,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:54:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash 757933372, now seen corresponding path program 1 times [2022-11-16 11:54:20,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:20,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204691193] [2022-11-16 11:54:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:20,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:54:20,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:54:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:54:20,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:54:20,193 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:54:20,194 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2022-11-16 11:54:20,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2022-11-16 11:54:20,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2022-11-16 11:54:20,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2022-11-16 11:54:20,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2022-11-16 11:54:20,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2022-11-16 11:54:20,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2022-11-16 11:54:20,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2022-11-16 11:54:20,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2022-11-16 11:54:20,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 18 remaining) [2022-11-16 11:54:20,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 18 remaining) [2022-11-16 11:54:20,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 18 remaining) [2022-11-16 11:54:20,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2022-11-16 11:54:20,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 18 remaining) [2022-11-16 11:54:20,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2022-11-16 11:54:20,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2022-11-16 11:54:20,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2022-11-16 11:54:20,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2022-11-16 11:54:20,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:54:20,202 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-16 11:54:20,204 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:54:20,204 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 11:54:20,326 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-16 11:54:20,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 341 places, 374 transitions, 796 flow [2022-11-16 11:54:20,764 INFO L130 PetriNetUnfolder]: 191/1429 cut-off events. [2022-11-16 11:54:20,764 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2022-11-16 11:54:20,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 1429 events. 191/1429 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 9272 event pairs, 2 based on Foata normal form. 0/1148 useless extension candidates. Maximal degree in co-relation 883. Up to 32 conditions per place. [2022-11-16 11:54:20,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 341 places, 374 transitions, 796 flow [2022-11-16 11:54:20,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 341 places, 374 transitions, 796 flow [2022-11-16 11:54:20,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:54:20,818 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;@34f0987e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:54:20,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-16 11:54:20,833 INFO L130 PetriNetUnfolder]: 4/82 cut-off events. [2022-11-16 11:54:20,833 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:54:20,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:20,835 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] [2022-11-16 11:54:20,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:54:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1672574062, now seen corresponding path program 1 times [2022-11-16 11:54:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:20,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868608804] [2022-11-16 11:54:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:21,014 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 11:54:21,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:21,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868608804] [2022-11-16 11:54:21,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868608804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:21,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:21,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:21,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760636753] [2022-11-16 11:54:21,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:21,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:21,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:21,023 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 374 [2022-11-16 11:54:21,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 374 transitions, 796 flow. Second operand has 4 states, 4 states have (on average 321.75) internal successors, (1287), 4 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states 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 11:54:21,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:21,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 374 [2022-11-16 11:54:21,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:21,501 INFO L130 PetriNetUnfolder]: 66/1095 cut-off events. [2022-11-16 11:54:21,502 INFO L131 PetriNetUnfolder]: For 295/616 co-relation queries the response was YES. [2022-11-16 11:54:21,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 1095 events. 66/1095 cut-off events. For 295/616 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6765 event pairs, 2 based on Foata normal form. 394/1340 useless extension candidates. Maximal degree in co-relation 819. Up to 85 conditions per place. [2022-11-16 11:54:21,535 INFO L137 encePairwiseOnDemand]: 339/374 looper letters, 27 selfloop transitions, 4 changer transitions 0/351 dead transitions. [2022-11-16 11:54:21,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 351 transitions, 812 flow [2022-11-16 11:54:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:54:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1663 transitions. [2022-11-16 11:54:21,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8893048128342246 [2022-11-16 11:54:21,542 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1663 transitions. [2022-11-16 11:54:21,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1663 transitions. [2022-11-16 11:54:21,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:21,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1663 transitions. [2022-11-16 11:54:21,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 332.6) internal successors, (1663), 5 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states 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 11:54:21,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 11:54:21,555 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 11:54:21,555 INFO L175 Difference]: Start difference. First operand has 341 places, 374 transitions, 796 flow. Second operand 5 states and 1663 transitions. [2022-11-16 11:54:21,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 351 transitions, 812 flow [2022-11-16 11:54:21,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 351 transitions, 812 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:54:21,570 INFO L231 Difference]: Finished difference. Result has 346 places, 347 transitions, 768 flow [2022-11-16 11:54:21,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=768, PETRI_PLACES=346, PETRI_TRANSITIONS=347} [2022-11-16 11:54:21,572 INFO L288 CegarLoopForPetriNet]: 341 programPoint places, 5 predicate places. [2022-11-16 11:54:21,572 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 347 transitions, 768 flow [2022-11-16 11:54:21,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.75) internal successors, (1287), 4 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states 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 11:54:21,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:21,574 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:54:21,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:54:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash 581824412, now seen corresponding path program 1 times [2022-11-16 11:54:21,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:21,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994437368] [2022-11-16 11:54:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:21,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:54:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994437368] [2022-11-16 11:54:21,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994437368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:21,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:21,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:21,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735928720] [2022-11-16 11:54:21,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:21,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:21,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:21,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:21,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 374 [2022-11-16 11:54:21,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 347 transitions, 768 flow. Second operand has 4 states, 4 states have (on average 323.75) internal successors, (1295), 4 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states 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 11:54:21,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:21,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 374 [2022-11-16 11:54:21,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:22,244 INFO L130 PetriNetUnfolder]: 66/1094 cut-off events. [2022-11-16 11:54:22,244 INFO L131 PetriNetUnfolder]: For 299/607 co-relation queries the response was YES. [2022-11-16 11:54:22,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 1094 events. 66/1094 cut-off events. For 299/607 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6771 event pairs, 2 based on Foata normal form. 13/962 useless extension candidates. Maximal degree in co-relation 1206. Up to 74 conditions per place. [2022-11-16 11:54:22,279 INFO L137 encePairwiseOnDemand]: 368/374 looper letters, 19 selfloop transitions, 8 changer transitions 0/347 dead transitions. [2022-11-16 11:54:22,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 347 transitions, 820 flow [2022-11-16 11:54:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:54:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1625 transitions. [2022-11-16 11:54:22,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8689839572192514 [2022-11-16 11:54:22,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1625 transitions. [2022-11-16 11:54:22,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1625 transitions. [2022-11-16 11:54:22,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:22,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1625 transitions. [2022-11-16 11:54:22,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states 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 11:54:22,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 11:54:22,298 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 11:54:22,299 INFO L175 Difference]: Start difference. First operand has 346 places, 347 transitions, 768 flow. Second operand 5 states and 1625 transitions. [2022-11-16 11:54:22,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 347 transitions, 820 flow [2022-11-16 11:54:22,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 347 transitions, 818 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:54:22,310 INFO L231 Difference]: Finished difference. Result has 349 places, 347 transitions, 786 flow [2022-11-16 11:54:22,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=786, PETRI_PLACES=349, PETRI_TRANSITIONS=347} [2022-11-16 11:54:22,314 INFO L288 CegarLoopForPetriNet]: 341 programPoint places, 8 predicate places. [2022-11-16 11:54:22,315 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 347 transitions, 786 flow [2022-11-16 11:54:22,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 323.75) internal successors, (1295), 4 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states 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 11:54:22,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:22,321 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:22,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:54:22,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:54:22,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:22,323 INFO L85 PathProgramCache]: Analyzing trace with hash 856688449, now seen corresponding path program 1 times [2022-11-16 11:54:22,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:22,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089359433] [2022-11-16 11:54:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:22,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:22,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:22,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089359433] [2022-11-16 11:54:22,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089359433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:22,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145894576] [2022-11-16 11:54:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:22,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:22,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:22,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:22,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:54:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:22,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:54:22,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:22,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:22,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145894576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:22,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:54:22,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:54:22,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736944091] [2022-11-16 11:54:22,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:22,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:54:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:54:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:54:22,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 374 [2022-11-16 11:54:22,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 347 transitions, 786 flow. Second operand has 6 states, 6 states have (on average 322.6666666666667) internal successors, (1936), 6 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states 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 11:54:22,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:22,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 374 [2022-11-16 11:54:22,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:23,318 INFO L130 PetriNetUnfolder]: 66/1093 cut-off events. [2022-11-16 11:54:23,318 INFO L131 PetriNetUnfolder]: For 304/599 co-relation queries the response was YES. [2022-11-16 11:54:23,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 1093 events. 66/1093 cut-off events. For 304/599 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6764 event pairs, 2 based on Foata normal form. 11/959 useless extension candidates. Maximal degree in co-relation 835. Up to 77 conditions per place. [2022-11-16 11:54:23,354 INFO L137 encePairwiseOnDemand]: 369/374 looper letters, 23 selfloop transitions, 6 changer transitions 0/349 dead transitions. [2022-11-16 11:54:23,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 349 transitions, 846 flow [2022-11-16 11:54:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:54:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:54:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2270 transitions. [2022-11-16 11:54:23,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.86707410236822 [2022-11-16 11:54:23,360 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2270 transitions. [2022-11-16 11:54:23,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2270 transitions. [2022-11-16 11:54:23,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:23,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2270 transitions. [2022-11-16 11:54:23,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 324.2857142857143) internal successors, (2270), 7 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states 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 11:54:23,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 11:54:23,376 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 11:54:23,377 INFO L175 Difference]: Start difference. First operand has 349 places, 347 transitions, 786 flow. Second operand 7 states and 2270 transitions. [2022-11-16 11:54:23,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 349 transitions, 846 flow [2022-11-16 11:54:23,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 349 transitions, 834 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:54:23,385 INFO L231 Difference]: Finished difference. Result has 351 places, 346 transitions, 782 flow [2022-11-16 11:54:23,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=782, PETRI_PLACES=351, PETRI_TRANSITIONS=346} [2022-11-16 11:54:23,387 INFO L288 CegarLoopForPetriNet]: 341 programPoint places, 10 predicate places. [2022-11-16 11:54:23,387 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 346 transitions, 782 flow [2022-11-16 11:54:23,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 322.6666666666667) internal successors, (1936), 6 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states 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 11:54:23,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:23,388 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] [2022-11-16 11:54:23,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:23,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:23,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:54:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash -401947896, now seen corresponding path program 1 times [2022-11-16 11:54:23,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:23,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065040310] [2022-11-16 11:54:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:23,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:23,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065040310] [2022-11-16 11:54:23,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065040310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:23,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974414305] [2022-11-16 11:54:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:23,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:23,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:23,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:23,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:54:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:54:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:24,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:24,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974414305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:24,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:54:24,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:54:24,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878243010] [2022-11-16 11:54:24,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:24,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:54:24,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:54:24,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:24,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 374 [2022-11-16 11:54:24,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 346 transitions, 782 flow. Second operand has 10 states, 10 states have (on average 323.0) internal successors, (3230), 10 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states 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 11:54:24,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:24,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 374 [2022-11-16 11:54:24,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:24,190 INFO L130 PetriNetUnfolder]: 0/129 cut-off events. [2022-11-16 11:54:24,190 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-16 11:54:24,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 129 events. 0/129 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 2/131 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-16 11:54:24,192 INFO L137 encePairwiseOnDemand]: 369/374 looper letters, 13 selfloop transitions, 7 changer transitions 0/123 dead transitions. [2022-11-16 11:54:24,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 123 transitions, 340 flow [2022-11-16 11:54:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:54:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:54:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2902 transitions. [2022-11-16 11:54:24,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8621509209744503 [2022-11-16 11:54:24,201 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2902 transitions. [2022-11-16 11:54:24,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2902 transitions. [2022-11-16 11:54:24,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:24,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2902 transitions. [2022-11-16 11:54:24,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 322.44444444444446) internal successors, (2902), 9 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states 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 11:54:24,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 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 11:54:24,219 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 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 11:54:24,220 INFO L175 Difference]: Start difference. First operand has 351 places, 346 transitions, 782 flow. Second operand 9 states and 2902 transitions. [2022-11-16 11:54:24,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 123 transitions, 340 flow [2022-11-16 11:54:24,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 123 transitions, 323 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-16 11:54:24,224 INFO L231 Difference]: Finished difference. Result has 137 places, 118 transitions, 285 flow [2022-11-16 11:54:24,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=285, PETRI_PLACES=137, PETRI_TRANSITIONS=118} [2022-11-16 11:54:24,225 INFO L288 CegarLoopForPetriNet]: 341 programPoint places, -204 predicate places. [2022-11-16 11:54:24,225 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 118 transitions, 285 flow [2022-11-16 11:54:24,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 323.0) internal successors, (3230), 10 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states 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 11:54:24,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:24,228 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:24,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:24,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:24,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:54:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash -571328974, now seen corresponding path program 1 times [2022-11-16 11:54:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:24,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874255287] [2022-11-16 11:54:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:54:24,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:54:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:54:24,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:54:24,511 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:54:24,511 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2022-11-16 11:54:24,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 22 remaining) [2022-11-16 11:54:24,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 22 remaining) [2022-11-16 11:54:24,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 22 remaining) [2022-11-16 11:54:24,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 22 remaining) [2022-11-16 11:54:24,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 22 remaining) [2022-11-16 11:54:24,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 22 remaining) [2022-11-16 11:54:24,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 22 remaining) [2022-11-16 11:54:24,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 22 remaining) [2022-11-16 11:54:24,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 22 remaining) [2022-11-16 11:54:24,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 22 remaining) [2022-11-16 11:54:24,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 22 remaining) [2022-11-16 11:54:24,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 22 remaining) [2022-11-16 11:54:24,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 22 remaining) [2022-11-16 11:54:24,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 22 remaining) [2022-11-16 11:54:24,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 22 remaining) [2022-11-16 11:54:24,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 22 remaining) [2022-11-16 11:54:24,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 22 remaining) [2022-11-16 11:54:24,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 22 remaining) [2022-11-16 11:54:24,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 22 remaining) [2022-11-16 11:54:24,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 22 remaining) [2022-11-16 11:54:24,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 22 remaining) [2022-11-16 11:54:24,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:54:24,517 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:54:24,518 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:54:24,518 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 11:54:24,622 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-16 11:54:24,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 456 places, 504 transitions, 1086 flow [2022-11-16 11:54:26,196 INFO L130 PetriNetUnfolder]: 664/4070 cut-off events. [2022-11-16 11:54:26,197 INFO L131 PetriNetUnfolder]: For 419/462 co-relation queries the response was YES. [2022-11-16 11:54:26,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 4070 events. 664/4070 cut-off events. For 419/462 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 32751 event pairs, 52 based on Foata normal form. 0/3259 useless extension candidates. Maximal degree in co-relation 2595. Up to 192 conditions per place. [2022-11-16 11:54:26,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 456 places, 504 transitions, 1086 flow [2022-11-16 11:54:26,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 456 places, 504 transitions, 1086 flow [2022-11-16 11:54:26,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:54:26,436 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;@34f0987e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:54:26,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-11-16 11:54:26,448 INFO L130 PetriNetUnfolder]: 4/82 cut-off events. [2022-11-16 11:54:26,448 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:54:26,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:26,449 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] [2022-11-16 11:54:26,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2022-11-16 11:54:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:26,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1931897284, now seen corresponding path program 1 times [2022-11-16 11:54:26,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:26,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840656895] [2022-11-16 11:54:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:26,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:26,547 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 11:54:26,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:26,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840656895] [2022-11-16 11:54:26,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840656895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:26,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:26,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:26,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144738826] [2022-11-16 11:54:26,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:26,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:26,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 504 [2022-11-16 11:54:26,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 504 transitions, 1086 flow. Second operand has 4 states, 4 states have (on average 432.75) internal successors, (1731), 4 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states 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 11:54:26,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:26,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 504 [2022-11-16 11:54:26,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:28,332 INFO L130 PetriNetUnfolder]: 359/3454 cut-off events. [2022-11-16 11:54:28,333 INFO L131 PetriNetUnfolder]: For 1305/1993 co-relation queries the response was YES. [2022-11-16 11:54:28,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4322 conditions, 3454 events. 359/3454 cut-off events. For 1305/1993 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 28714 event pairs, 36 based on Foata normal form. 2387/5329 useless extension candidates. Maximal degree in co-relation 2565. Up to 421 conditions per place. [2022-11-16 11:54:28,498 INFO L137 encePairwiseOnDemand]: 457/504 looper letters, 33 selfloop transitions, 4 changer transitions 0/468 dead transitions. [2022-11-16 11:54:28,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 468 transitions, 1088 flow [2022-11-16 11:54:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:54:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2236 transitions. [2022-11-16 11:54:28,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8873015873015873 [2022-11-16 11:54:28,504 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2236 transitions. [2022-11-16 11:54:28,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2236 transitions. [2022-11-16 11:54:28,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:28,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2236 transitions. [2022-11-16 11:54:28,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 447.2) internal successors, (2236), 5 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states 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 11:54:28,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states 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 11:54:28,517 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states 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 11:54:28,517 INFO L175 Difference]: Start difference. First operand has 456 places, 504 transitions, 1086 flow. Second operand 5 states and 2236 transitions. [2022-11-16 11:54:28,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 468 transitions, 1088 flow [2022-11-16 11:54:28,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 468 transitions, 1088 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:54:28,531 INFO L231 Difference]: Finished difference. Result has 460 places, 464 transitions, 1032 flow [2022-11-16 11:54:28,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1032, PETRI_PLACES=460, PETRI_TRANSITIONS=464} [2022-11-16 11:54:28,533 INFO L288 CegarLoopForPetriNet]: 456 programPoint places, 4 predicate places. [2022-11-16 11:54:28,533 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 464 transitions, 1032 flow [2022-11-16 11:54:28,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 432.75) internal successors, (1731), 4 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states 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 11:54:28,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:28,551 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:28,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:54:28,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2022-11-16 11:54:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:28,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1682873802, now seen corresponding path program 1 times [2022-11-16 11:54:28,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:28,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538738343] [2022-11-16 11:54:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:28,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:54:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:28,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538738343] [2022-11-16 11:54:28,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538738343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:28,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:28,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:28,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578945849] [2022-11-16 11:54:28,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:28,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:28,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:28,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:28,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 504 [2022-11-16 11:54:28,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 464 transitions, 1032 flow. Second operand has 4 states, 4 states have (on average 434.75) internal successors, (1739), 4 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states 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 11:54:28,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:28,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 504 [2022-11-16 11:54:28,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:30,310 INFO L130 PetriNetUnfolder]: 359/3452 cut-off events. [2022-11-16 11:54:30,310 INFO L131 PetriNetUnfolder]: For 1312/1981 co-relation queries the response was YES. [2022-11-16 11:54:30,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4340 conditions, 3452 events. 359/3452 cut-off events. For 1312/1981 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 28637 event pairs, 36 based on Foata normal form. 20/2967 useless extension candidates. Maximal degree in co-relation 4251. Up to 401 conditions per place. [2022-11-16 11:54:30,440 INFO L137 encePairwiseOnDemand]: 498/504 looper letters, 25 selfloop transitions, 8 changer transitions 0/464 dead transitions. [2022-11-16 11:54:30,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 464 transitions, 1096 flow [2022-11-16 11:54:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:54:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2186 transitions. [2022-11-16 11:54:30,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8674603174603175 [2022-11-16 11:54:30,447 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2186 transitions. [2022-11-16 11:54:30,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2186 transitions. [2022-11-16 11:54:30,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:30,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2186 transitions. [2022-11-16 11:54:30,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 437.2) internal successors, (2186), 5 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states 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 11:54:30,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states 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 11:54:30,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states 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 11:54:30,461 INFO L175 Difference]: Start difference. First operand has 460 places, 464 transitions, 1032 flow. Second operand 5 states and 2186 transitions. [2022-11-16 11:54:30,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 464 transitions, 1096 flow [2022-11-16 11:54:30,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 464 transitions, 1094 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:54:30,472 INFO L231 Difference]: Finished difference. Result has 463 places, 464 transitions, 1050 flow [2022-11-16 11:54:30,473 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1050, PETRI_PLACES=463, PETRI_TRANSITIONS=464} [2022-11-16 11:54:30,474 INFO L288 CegarLoopForPetriNet]: 456 programPoint places, 7 predicate places. [2022-11-16 11:54:30,474 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 464 transitions, 1050 flow [2022-11-16 11:54:30,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 434.75) internal successors, (1739), 4 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states 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 11:54:30,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:30,476 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:54:30,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2022-11-16 11:54:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash 629481673, now seen corresponding path program 1 times [2022-11-16 11:54:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:30,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289532211] [2022-11-16 11:54:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:30,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:30,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289532211] [2022-11-16 11:54:30,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289532211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:30,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142013797] [2022-11-16 11:54:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:30,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:30,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:30,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:30,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:54:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:54:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:30,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:30,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142013797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:30,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:54:30,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:54:30,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038859440] [2022-11-16 11:54:30,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:30,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:54:30,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:54:30,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:54:30,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 504 [2022-11-16 11:54:30,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 464 transitions, 1050 flow. Second operand has 6 states, 6 states have (on average 433.6666666666667) internal successors, (2602), 6 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states 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 11:54:30,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:30,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 504 [2022-11-16 11:54:30,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:32,515 INFO L130 PetriNetUnfolder]: 359/3450 cut-off events. [2022-11-16 11:54:32,515 INFO L131 PetriNetUnfolder]: For 1323/1973 co-relation queries the response was YES. [2022-11-16 11:54:32,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 3450 events. 359/3450 cut-off events. For 1323/1973 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 28656 event pairs, 36 based on Foata normal form. 14/2959 useless extension candidates. Maximal degree in co-relation 2586. Up to 407 conditions per place. [2022-11-16 11:54:32,615 INFO L137 encePairwiseOnDemand]: 499/504 looper letters, 29 selfloop transitions, 6 changer transitions 0/466 dead transitions. [2022-11-16 11:54:32,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 466 transitions, 1122 flow [2022-11-16 11:54:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:54:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:54:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3053 transitions. [2022-11-16 11:54:32,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8653628117913832 [2022-11-16 11:54:32,623 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3053 transitions. [2022-11-16 11:54:32,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3053 transitions. [2022-11-16 11:54:32,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:32,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3053 transitions. [2022-11-16 11:54:32,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 436.14285714285717) internal successors, (3053), 7 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states 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 11:54:32,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 504.0) internal successors, (4032), 8 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states 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 11:54:32,639 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 504.0) internal successors, (4032), 8 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states 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 11:54:32,639 INFO L175 Difference]: Start difference. First operand has 463 places, 464 transitions, 1050 flow. Second operand 7 states and 3053 transitions. [2022-11-16 11:54:32,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 466 transitions, 1122 flow [2022-11-16 11:54:32,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 466 transitions, 1110 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:54:32,648 INFO L231 Difference]: Finished difference. Result has 465 places, 463 transitions, 1046 flow [2022-11-16 11:54:32,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1046, PETRI_PLACES=465, PETRI_TRANSITIONS=463} [2022-11-16 11:54:32,650 INFO L288 CegarLoopForPetriNet]: 456 programPoint places, 9 predicate places. [2022-11-16 11:54:32,650 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 463 transitions, 1046 flow [2022-11-16 11:54:32,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 433.6666666666667) internal successors, (2602), 6 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states 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 11:54:32,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:32,651 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] [2022-11-16 11:54:32,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:32,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:32,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2022-11-16 11:54:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash -948988087, now seen corresponding path program 1 times [2022-11-16 11:54:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:32,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543775492] [2022-11-16 11:54:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:32,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543775492] [2022-11-16 11:54:32,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543775492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:32,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268041079] [2022-11-16 11:54:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:32,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:32,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:32,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:33,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:54:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:54:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:33,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:33,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268041079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:33,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:54:33,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:54:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778882771] [2022-11-16 11:54:33,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:33,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:54:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:54:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:33,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 504 [2022-11-16 11:54:33,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 463 transitions, 1046 flow. Second operand has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states 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 11:54:33,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:33,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 504 [2022-11-16 11:54:33,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:34,363 INFO L130 PetriNetUnfolder]: 333/2830 cut-off events. [2022-11-16 11:54:34,363 INFO L131 PetriNetUnfolder]: For 1226/1433 co-relation queries the response was YES. [2022-11-16 11:54:34,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3696 conditions, 2830 events. 333/2830 cut-off events. For 1226/1433 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 21348 event pairs, 76 based on Foata normal form. 8/2417 useless extension candidates. Maximal degree in co-relation 3544. Up to 392 conditions per place. [2022-11-16 11:54:34,439 INFO L137 encePairwiseOnDemand]: 498/504 looper letters, 34 selfloop transitions, 9 changer transitions 0/474 dead transitions. [2022-11-16 11:54:34,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 474 transitions, 1170 flow [2022-11-16 11:54:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:54:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:54:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3924 transitions. [2022-11-16 11:54:34,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8650793650793651 [2022-11-16 11:54:34,448 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3924 transitions. [2022-11-16 11:54:34,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3924 transitions. [2022-11-16 11:54:34,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:34,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3924 transitions. [2022-11-16 11:54:34,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states 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 11:54:34,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 504.0) internal successors, (5040), 10 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states 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 11:54:34,469 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 504.0) internal successors, (5040), 10 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states 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 11:54:34,469 INFO L175 Difference]: Start difference. First operand has 465 places, 463 transitions, 1046 flow. Second operand 9 states and 3924 transitions. [2022-11-16 11:54:34,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 474 transitions, 1170 flow [2022-11-16 11:54:34,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 474 transitions, 1157 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-16 11:54:34,479 INFO L231 Difference]: Finished difference. Result has 472 places, 467 transitions, 1093 flow [2022-11-16 11:54:34,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1093, PETRI_PLACES=472, PETRI_TRANSITIONS=467} [2022-11-16 11:54:34,481 INFO L288 CegarLoopForPetriNet]: 456 programPoint places, 16 predicate places. [2022-11-16 11:54:34,481 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 467 transitions, 1093 flow [2022-11-16 11:54:34,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states 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 11:54:34,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:34,483 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:34,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:34,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:34,689 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2022-11-16 11:54:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1532711581, now seen corresponding path program 1 times [2022-11-16 11:54:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:34,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316768944] [2022-11-16 11:54:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:54:34,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:54:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:54:34,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:54:34,788 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:54:34,788 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (25 of 26 remaining) [2022-11-16 11:54:34,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 26 remaining) [2022-11-16 11:54:34,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 26 remaining) [2022-11-16 11:54:34,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 26 remaining) [2022-11-16 11:54:34,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 26 remaining) [2022-11-16 11:54:34,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 26 remaining) [2022-11-16 11:54:34,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 26 remaining) [2022-11-16 11:54:34,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 26 remaining) [2022-11-16 11:54:34,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 26 remaining) [2022-11-16 11:54:34,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 26 remaining) [2022-11-16 11:54:34,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 26 remaining) [2022-11-16 11:54:34,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 26 remaining) [2022-11-16 11:54:34,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 26 remaining) [2022-11-16 11:54:34,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 26 remaining) [2022-11-16 11:54:34,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 26 remaining) [2022-11-16 11:54:34,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 26 remaining) [2022-11-16 11:54:34,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 26 remaining) [2022-11-16 11:54:34,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 26 remaining) [2022-11-16 11:54:34,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 26 remaining) [2022-11-16 11:54:34,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 26 remaining) [2022-11-16 11:54:34,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 26 remaining) [2022-11-16 11:54:34,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 26 remaining) [2022-11-16 11:54:34,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 26 remaining) [2022-11-16 11:54:34,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 26 remaining) [2022-11-16 11:54:34,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 26 remaining) [2022-11-16 11:54:34,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 26 remaining) [2022-11-16 11:54:34,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:54:34,794 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:54:34,796 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:54:34,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 11:54:34,913 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-16 11:54:34,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 571 places, 634 transitions, 1380 flow [2022-11-16 11:54:41,558 INFO L130 PetriNetUnfolder]: 2659/13035 cut-off events. [2022-11-16 11:54:41,558 INFO L131 PetriNetUnfolder]: For 2144/2211 co-relation queries the response was YES. [2022-11-16 11:54:42,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15200 conditions, 13035 events. 2659/13035 cut-off events. For 2144/2211 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 127992 event pairs, 626 based on Foata normal form. 0/10496 useless extension candidates. Maximal degree in co-relation 8126. Up to 1024 conditions per place. [2022-11-16 11:54:42,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 571 places, 634 transitions, 1380 flow [2022-11-16 11:54:42,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 571 places, 634 transitions, 1380 flow [2022-11-16 11:54:42,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:54:42,349 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;@34f0987e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:54:42,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2022-11-16 11:54:42,358 INFO L130 PetriNetUnfolder]: 4/82 cut-off events. [2022-11-16 11:54:42,359 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:54:42,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:42,359 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] [2022-11-16 11:54:42,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:54:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1533781576, now seen corresponding path program 1 times [2022-11-16 11:54:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:42,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543197750] [2022-11-16 11:54:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:42,445 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 11:54:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543197750] [2022-11-16 11:54:42,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543197750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:42,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:42,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124501800] [2022-11-16 11:54:42,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:42,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:42,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:42,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 542 out of 634 [2022-11-16 11:54:42,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 634 transitions, 1380 flow. Second operand has 4 states, 4 states have (on average 543.75) internal successors, (2175), 4 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states 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 11:54:42,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:42,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 542 of 634 [2022-11-16 11:54:42,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:48,486 INFO L130 PetriNetUnfolder]: 1860/11821 cut-off events. [2022-11-16 11:54:48,487 INFO L131 PetriNetUnfolder]: For 6349/7544 co-relation queries the response was YES. [2022-11-16 11:54:48,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16079 conditions, 11821 events. 1860/11821 cut-off events. For 6349/7544 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 120665 event pairs, 324 based on Foata normal form. 12726/22778 useless extension candidates. Maximal degree in co-relation 8560. Up to 2103 conditions per place. [2022-11-16 11:54:49,133 INFO L137 encePairwiseOnDemand]: 575/634 looper letters, 39 selfloop transitions, 4 changer transitions 0/585 dead transitions. [2022-11-16 11:54:49,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 585 transitions, 1368 flow [2022-11-16 11:54:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:54:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2809 transitions. [2022-11-16 11:54:49,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8861198738170347 [2022-11-16 11:54:49,143 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2809 transitions. [2022-11-16 11:54:49,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2809 transitions. [2022-11-16 11:54:49,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:49,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2809 transitions. [2022-11-16 11:54:49,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 561.8) internal successors, (2809), 5 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states 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 11:54:49,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 634.0) internal successors, (3804), 6 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states 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 11:54:49,164 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 634.0) internal successors, (3804), 6 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states 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 11:54:49,165 INFO L175 Difference]: Start difference. First operand has 571 places, 634 transitions, 1380 flow. Second operand 5 states and 2809 transitions. [2022-11-16 11:54:49,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 585 transitions, 1368 flow [2022-11-16 11:54:49,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 585 transitions, 1368 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:54:49,183 INFO L231 Difference]: Finished difference. Result has 574 places, 581 transitions, 1300 flow [2022-11-16 11:54:49,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1300, PETRI_PLACES=574, PETRI_TRANSITIONS=581} [2022-11-16 11:54:49,186 INFO L288 CegarLoopForPetriNet]: 571 programPoint places, 3 predicate places. [2022-11-16 11:54:49,186 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 581 transitions, 1300 flow [2022-11-16 11:54:49,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 543.75) internal successors, (2175), 4 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states 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 11:54:49,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:49,188 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:49,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:54:49,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:54:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:49,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1591657414, now seen corresponding path program 1 times [2022-11-16 11:54:49,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:49,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522501219] [2022-11-16 11:54:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:49,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:54:49,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:49,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522501219] [2022-11-16 11:54:49,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522501219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:49,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:49,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:49,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180502025] [2022-11-16 11:54:49,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:49,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:49,289 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 542 out of 634 [2022-11-16 11:54:49,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 581 transitions, 1300 flow. Second operand has 4 states, 4 states have (on average 545.75) internal successors, (2183), 4 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states 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 11:54:49,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:49,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 542 of 634 [2022-11-16 11:54:49,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:54:55,346 INFO L130 PetriNetUnfolder]: 1860/11818 cut-off events. [2022-11-16 11:54:55,346 INFO L131 PetriNetUnfolder]: For 6358/7529 co-relation queries the response was YES. [2022-11-16 11:54:55,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16100 conditions, 11818 events. 1860/11818 cut-off events. For 6358/7529 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 121237 event pairs, 324 based on Foata normal form. 27/10086 useless extension candidates. Maximal degree in co-relation 16009. Up to 2074 conditions per place. [2022-11-16 11:54:56,013 INFO L137 encePairwiseOnDemand]: 628/634 looper letters, 31 selfloop transitions, 8 changer transitions 0/581 dead transitions. [2022-11-16 11:54:56,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 581 transitions, 1376 flow [2022-11-16 11:54:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:54:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2747 transitions. [2022-11-16 11:54:56,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8665615141955836 [2022-11-16 11:54:56,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2747 transitions. [2022-11-16 11:54:56,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2747 transitions. [2022-11-16 11:54:56,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:54:56,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2747 transitions. [2022-11-16 11:54:56,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 549.4) internal successors, (2747), 5 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states 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 11:54:56,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 634.0) internal successors, (3804), 6 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states 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 11:54:56,039 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 634.0) internal successors, (3804), 6 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states 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 11:54:56,039 INFO L175 Difference]: Start difference. First operand has 574 places, 581 transitions, 1300 flow. Second operand 5 states and 2747 transitions. [2022-11-16 11:54:56,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 581 transitions, 1376 flow [2022-11-16 11:54:56,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 581 transitions, 1374 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:54:56,052 INFO L231 Difference]: Finished difference. Result has 577 places, 581 transitions, 1318 flow [2022-11-16 11:54:56,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1318, PETRI_PLACES=577, PETRI_TRANSITIONS=581} [2022-11-16 11:54:56,054 INFO L288 CegarLoopForPetriNet]: 571 programPoint places, 6 predicate places. [2022-11-16 11:54:56,054 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 581 transitions, 1318 flow [2022-11-16 11:54:56,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 545.75) internal successors, (2183), 4 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states 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 11:54:56,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:54:56,055 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:56,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:54:56,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:54:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2096737583, now seen corresponding path program 1 times [2022-11-16 11:54:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:56,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997111957] [2022-11-16 11:54:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:56,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:56,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997111957] [2022-11-16 11:54:56,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997111957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:56,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113008120] [2022-11-16 11:54:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:56,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:56,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:56,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:56,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:54:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:56,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:54:56,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:56,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:56,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113008120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:56,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:54:56,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:54:56,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162151728] [2022-11-16 11:54:56,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:56,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:54:56,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:54:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:54:56,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 542 out of 634 [2022-11-16 11:54:56,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 581 transitions, 1318 flow. Second operand has 6 states, 6 states have (on average 544.6666666666666) internal successors, (3268), 6 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states 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 11:54:56,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:54:56,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 542 of 634 [2022-11-16 11:54:56,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:55:02,425 INFO L130 PetriNetUnfolder]: 1860/11815 cut-off events. [2022-11-16 11:55:02,425 INFO L131 PetriNetUnfolder]: For 6374/7521 co-relation queries the response was YES. [2022-11-16 11:55:02,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16113 conditions, 11815 events. 1860/11815 cut-off events. For 6374/7521 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 120843 event pairs, 324 based on Foata normal form. 17/10073 useless extension candidates. Maximal degree in co-relation 8586. Up to 2083 conditions per place. [2022-11-16 11:55:03,159 INFO L137 encePairwiseOnDemand]: 629/634 looper letters, 35 selfloop transitions, 6 changer transitions 0/583 dead transitions. [2022-11-16 11:55:03,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 583 transitions, 1402 flow [2022-11-16 11:55:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:55:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:55:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3836 transitions. [2022-11-16 11:55:03,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8643533123028391 [2022-11-16 11:55:03,169 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3836 transitions. [2022-11-16 11:55:03,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3836 transitions. [2022-11-16 11:55:03,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:55:03,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3836 transitions. [2022-11-16 11:55:03,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 11:55:03,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 634.0) internal successors, (5072), 8 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states 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 11:55:03,193 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 634.0) internal successors, (5072), 8 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states 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 11:55:03,194 INFO L175 Difference]: Start difference. First operand has 577 places, 581 transitions, 1318 flow. Second operand 7 states and 3836 transitions. [2022-11-16 11:55:03,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 583 transitions, 1402 flow [2022-11-16 11:55:03,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 583 transitions, 1390 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:55:03,209 INFO L231 Difference]: Finished difference. Result has 579 places, 580 transitions, 1314 flow [2022-11-16 11:55:03,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=579, PETRI_TRANSITIONS=580} [2022-11-16 11:55:03,211 INFO L288 CegarLoopForPetriNet]: 571 programPoint places, 8 predicate places. [2022-11-16 11:55:03,211 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 580 transitions, 1314 flow [2022-11-16 11:55:03,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 544.6666666666666) internal successors, (3268), 6 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states 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 11:55:03,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:55:03,213 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] [2022-11-16 11:55:03,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:55:03,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:55:03,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:55:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2134668362, now seen corresponding path program 1 times [2022-11-16 11:55:03,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:03,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247495266] [2022-11-16 11:55:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:03,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:03,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:03,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247495266] [2022-11-16 11:55:03,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247495266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:55:03,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804855373] [2022-11-16 11:55:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:03,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:55:03,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:03,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:55:03,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:55:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:04,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:55:04,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:55:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:04,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:55:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:04,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804855373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:55:04,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:55:04,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:55:04,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141830784] [2022-11-16 11:55:04,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:55:04,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:55:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:55:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:55:04,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 542 out of 634 [2022-11-16 11:55:04,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 580 transitions, 1314 flow. Second operand has 10 states, 10 states have (on average 545.0) internal successors, (5450), 10 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states 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 11:55:04,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:55:04,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 542 of 634 [2022-11-16 11:55:04,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:55:10,149 INFO L130 PetriNetUnfolder]: 1826/10995 cut-off events. [2022-11-16 11:55:10,149 INFO L131 PetriNetUnfolder]: For 6300/6960 co-relation queries the response was YES. [2022-11-16 11:55:10,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15243 conditions, 10995 events. 1826/10995 cut-off events. For 6300/6960 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 111149 event pairs, 410 based on Foata normal form. 10/9360 useless extension candidates. Maximal degree in co-relation 8047. Up to 2064 conditions per place. [2022-11-16 11:55:10,697 INFO L137 encePairwiseOnDemand]: 628/634 looper letters, 40 selfloop transitions, 9 changer transitions 0/591 dead transitions. [2022-11-16 11:55:10,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 591 transitions, 1450 flow [2022-11-16 11:55:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:55:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:55:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4929 transitions. [2022-11-16 11:55:10,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8638275499474237 [2022-11-16 11:55:10,708 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4929 transitions. [2022-11-16 11:55:10,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4929 transitions. [2022-11-16 11:55:10,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:55:10,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4929 transitions. [2022-11-16 11:55:10,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 547.6666666666666) internal successors, (4929), 9 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states 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 11:55:10,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states 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 11:55:10,731 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states 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 11:55:10,731 INFO L175 Difference]: Start difference. First operand has 579 places, 580 transitions, 1314 flow. Second operand 9 states and 4929 transitions. [2022-11-16 11:55:10,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 591 transitions, 1450 flow [2022-11-16 11:55:10,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 591 transitions, 1437 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-16 11:55:10,743 INFO L231 Difference]: Finished difference. Result has 586 places, 584 transitions, 1361 flow [2022-11-16 11:55:10,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1361, PETRI_PLACES=586, PETRI_TRANSITIONS=584} [2022-11-16 11:55:10,745 INFO L288 CegarLoopForPetriNet]: 571 programPoint places, 15 predicate places. [2022-11-16 11:55:10,745 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 584 transitions, 1361 flow [2022-11-16 11:55:10,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 545.0) internal successors, (5450), 10 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states 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 11:55:10,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:55:10,747 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:55:10,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:55:10,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb09a36b-b1ac-454c-a32a-2dce54ea3492/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:55:10,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:55:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash -245403611, now seen corresponding path program 1 times [2022-11-16 11:55:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:10,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354484726] [2022-11-16 11:55:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:10,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 11:55:11,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:11,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354484726] [2022-11-16 11:55:11,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354484726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:11,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:11,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:55:11,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546551288] [2022-11-16 11:55:11,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:11,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:55:11,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:11,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:55:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:55:11,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 542 out of 634 [2022-11-16 11:55:11,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 584 transitions, 1361 flow. Second operand has 4 states, 4 states have (on average 544.5) internal successors, (2178), 4 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states 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 11:55:11,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:55:11,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 542 of 634 [2022-11-16 11:55:11,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:55:17,027 INFO L130 PetriNetUnfolder]: 1824/10987 cut-off events. [2022-11-16 11:55:17,027 INFO L131 PetriNetUnfolder]: For 6417/8359 co-relation queries the response was YES. [2022-11-16 11:55:17,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15307 conditions, 10987 events. 1824/10987 cut-off events. For 6417/8359 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 111777 event pairs, 424 based on Foata normal form. 18/9369 useless extension candidates. Maximal degree in co-relation 8068. Up to 2128 conditions per place. [2022-11-16 11:55:17,613 INFO L137 encePairwiseOnDemand]: 627/634 looper letters, 39 selfloop transitions, 4 changer transitions 0/591 dead transitions. [2022-11-16 11:55:17,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 591 transitions, 1461 flow [2022-11-16 11:55:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:55:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:55:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2756 transitions. [2022-11-16 11:55:17,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8694006309148264 [2022-11-16 11:55:17,620 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2756 transitions. [2022-11-16 11:55:17,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2756 transitions. [2022-11-16 11:55:17,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:55:17,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2756 transitions. [2022-11-16 11:55:17,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 551.2) internal successors, (2756), 5 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states 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 11:55:17,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 634.0) internal successors, (3804), 6 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states 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 11:55:17,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 634.0) internal successors, (3804), 6 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states 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 11:55:17,632 INFO L175 Difference]: Start difference. First operand has 586 places, 584 transitions, 1361 flow. Second operand 5 states and 2756 transitions. [2022-11-16 11:55:17,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 591 transitions, 1461 flow [2022-11-16 11:55:17,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 591 transitions, 1447 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-16 11:55:17,644 INFO L231 Difference]: Finished difference. Result has 589 places, 587 transitions, 1379 flow [2022-11-16 11:55:17,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1379, PETRI_PLACES=589, PETRI_TRANSITIONS=587} [2022-11-16 11:55:17,646 INFO L288 CegarLoopForPetriNet]: 571 programPoint places, 18 predicate places. [2022-11-16 11:55:17,647 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 587 transitions, 1379 flow [2022-11-16 11:55:17,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 544.5) internal successors, (2178), 4 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states 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 11:55:17,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:55:17,648 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:17,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:55:17,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:55:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1917133105, now seen corresponding path program 1 times [2022-11-16 11:55:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:17,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78119244] [2022-11-16 11:55:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:55:17,680 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:55:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:55:17,713 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:55:17,713 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:55:17,713 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (29 of 30 remaining) [2022-11-16 11:55:17,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 30 remaining) [2022-11-16 11:55:17,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 30 remaining) [2022-11-16 11:55:17,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 30 remaining) [2022-11-16 11:55:17,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 30 remaining) [2022-11-16 11:55:17,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 30 remaining) [2022-11-16 11:55:17,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 30 remaining) [2022-11-16 11:55:17,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 30 remaining) [2022-11-16 11:55:17,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 30 remaining) [2022-11-16 11:55:17,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 30 remaining) [2022-11-16 11:55:17,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 30 remaining) [2022-11-16 11:55:17,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 30 remaining) [2022-11-16 11:55:17,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 30 remaining) [2022-11-16 11:55:17,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 30 remaining) [2022-11-16 11:55:17,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 30 remaining) [2022-11-16 11:55:17,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 30 remaining) [2022-11-16 11:55:17,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 30 remaining) [2022-11-16 11:55:17,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 30 remaining) [2022-11-16 11:55:17,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 30 remaining) [2022-11-16 11:55:17,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 30 remaining) [2022-11-16 11:55:17,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 30 remaining) [2022-11-16 11:55:17,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 30 remaining) [2022-11-16 11:55:17,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 30 remaining) [2022-11-16 11:55:17,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 30 remaining) [2022-11-16 11:55:17,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 30 remaining) [2022-11-16 11:55:17,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 30 remaining) [2022-11-16 11:55:17,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 30 remaining) [2022-11-16 11:55:17,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 30 remaining) [2022-11-16 11:55:17,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 30 remaining) [2022-11-16 11:55:17,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 30 remaining) [2022-11-16 11:55:17,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:55:17,720 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 11:55:17,721 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:55:17,721 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 11:55:17,840 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2022-11-16 11:55:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 686 places, 764 transitions, 1678 flow