./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --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_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/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_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/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_4c27d97f-07cb-452e-bd54-3588307cd4d4/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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- 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 11:48:21,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:48:21,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:48:22,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:48:22,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:48:22,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:48:22,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:48:22,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:48:22,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:48:22,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:48:22,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:48:22,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:48:22,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:48:22,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:48:22,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:48:22,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:48:22,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:48:22,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:48:22,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:48:22,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:48:22,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:48:22,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:48:22,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:48:22,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:48:22,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:48:22,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:48:22,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:48:22,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:48:22,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:48:22,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:48:22,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:48:22,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:48:22,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:48:22,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:48:22,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:48:22,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:48:22,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:48:22,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:48:22,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:48:22,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:48:22,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:48:22,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:48:22,132 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:48:22,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:48:22,133 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:48:22,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:48:22,135 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:48:22,135 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:48:22,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:48:22,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:48:22,136 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:48:22,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:48:22,137 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:48:22,138 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:48:22,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:48:22,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:48:22,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:48:22,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:48:22,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:48:22,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:48:22,139 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:48:22,139 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:48:22,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:48:22,140 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:48:22,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:48:22,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:48:22,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:48:22,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:48:22,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:48:22,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:48:22,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:48:22,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:48:22,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:48:22,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:48:22,142 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:48:22,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:48:22,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:48:22,143 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_4c27d97f-07cb-452e-bd54-3588307cd4d4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-11-16 11:48:22,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:48:22,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:48:22,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:48:22,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:48:22,493 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:48:22,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-16 11:48:22,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/data/b814d8366/00bf954f59e4413fa8716418a1e06b71/FLAG26061da91 [2022-11-16 11:48:23,132 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:48:23,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-16 11:48:23,150 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/data/b814d8366/00bf954f59e4413fa8716418a1e06b71/FLAG26061da91 [2022-11-16 11:48:23,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/data/b814d8366/00bf954f59e4413fa8716418a1e06b71 [2022-11-16 11:48:23,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:48:23,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:48:23,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:48:23,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:48:23,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:48:23,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:23,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1409e5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23, skipping insertion in model container [2022-11-16 11:48:23,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:23,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:48:23,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:48:23,827 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_4c27d97f-07cb-452e-bd54-3588307cd4d4/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-16 11:48:23,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:48:23,859 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:48:23,903 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_4c27d97f-07cb-452e-bd54-3588307cd4d4/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-16 11:48:23,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:48:23,936 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:48:23,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23 WrapperNode [2022-11-16 11:48:23,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:48:23,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:48:23,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:48:23,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:48:23,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:23,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,003 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 238 [2022-11-16 11:48:24,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:48:24,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:48:24,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:48:24,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:48:24,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,032 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:48:24,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:48:24,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:48:24,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:48:24,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (1/1) ... [2022-11-16 11:48:24,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:48:24,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:24,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:48:24,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:48:24,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:48:24,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:48:24,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:48:24,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:48:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:48:24,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:48:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:48:24,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:48:24,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:48:24,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:48:24,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:48:24,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:48:24,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:48:24,139 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 11:48:24,310 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:48:24,313 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:48:24,951 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:48:24,964 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:48:24,967 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:48:24,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:48:24 BoogieIcfgContainer [2022-11-16 11:48:24,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:48:24,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:48:24,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:48:24,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:48:24,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:48:23" (1/3) ... [2022-11-16 11:48:24,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4227dd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:48:24, skipping insertion in model container [2022-11-16 11:48:24,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:48:23" (2/3) ... [2022-11-16 11:48:24,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4227dd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:48:24, skipping insertion in model container [2022-11-16 11:48:24,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:48:24" (3/3) ... [2022-11-16 11:48:24,987 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2022-11-16 11:48:24,997 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:48:25,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:48:25,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-11-16 11:48:25,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:48:25,187 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:48:25,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 325 transitions, 666 flow [2022-11-16 11:48:25,399 INFO L130 PetriNetUnfolder]: 25/323 cut-off events. [2022-11-16 11:48:25,399 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:48:25,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 323 events. 25/323 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 634 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 203. Up to 3 conditions per place. [2022-11-16 11:48:25,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 325 transitions, 666 flow [2022-11-16 11:48:25,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 288 transitions, 585 flow [2022-11-16 11:48:25,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:48:25,432 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;@7c7279d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:48:25,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-11-16 11:48:25,444 INFO L130 PetriNetUnfolder]: 3/62 cut-off events. [2022-11-16 11:48:25,444 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:48:25,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:25,445 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] [2022-11-16 11:48:25,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2019046624, now seen corresponding path program 1 times [2022-11-16 11:48:25,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:25,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225091491] [2022-11-16 11:48:25,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:25,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:25,949 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 11:48:25,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:25,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225091491] [2022-11-16 11:48:25,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225091491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:25,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:25,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:48:25,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533815447] [2022-11-16 11:48:25,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:25,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:48:25,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:48:25,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:48:26,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 325 [2022-11-16 11:48:26,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 288 transitions, 585 flow. Second operand has 4 states, 4 states have (on average 282.5) internal successors, (1130), 4 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states 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 11:48:26,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:26,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 325 [2022-11-16 11:48:26,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:26,333 INFO L130 PetriNetUnfolder]: 19/480 cut-off events. [2022-11-16 11:48:26,333 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-16 11:48:26,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 480 events. 19/480 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1580 event pairs, 0 based on Foata normal form. 20/424 useless extension candidates. Maximal degree in co-relation 359. Up to 29 conditions per place. [2022-11-16 11:48:26,341 INFO L137 encePairwiseOnDemand]: 300/325 looper letters, 38 selfloop transitions, 9 changer transitions 4/296 dead transitions. [2022-11-16 11:48:26,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 296 transitions, 704 flow [2022-11-16 11:48:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:48:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:48:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1476 transitions. [2022-11-16 11:48:26,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9083076923076923 [2022-11-16 11:48:26,364 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1476 transitions. [2022-11-16 11:48:26,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1476 transitions. [2022-11-16 11:48:26,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:26,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1476 transitions. [2022-11-16 11:48:26,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 295.2) internal successors, (1476), 5 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 11:48:26,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 11:48:26,391 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 11:48:26,393 INFO L175 Difference]: Start difference. First operand has 273 places, 288 transitions, 585 flow. Second operand 5 states and 1476 transitions. [2022-11-16 11:48:26,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 296 transitions, 704 flow [2022-11-16 11:48:26,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 296 transitions, 694 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:48:26,411 INFO L231 Difference]: Finished difference. Result has 277 places, 279 transitions, 615 flow [2022-11-16 11:48:26,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=615, PETRI_PLACES=277, PETRI_TRANSITIONS=279} [2022-11-16 11:48:26,420 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 4 predicate places. [2022-11-16 11:48:26,421 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 279 transitions, 615 flow [2022-11-16 11:48:26,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.5) internal successors, (1130), 4 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states 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 11:48:26,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:26,423 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:26,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:48:26,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:26,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2071201129, now seen corresponding path program 1 times [2022-11-16 11:48:26,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:26,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489013033] [2022-11-16 11:48:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:26,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:26,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:26,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489013033] [2022-11-16 11:48:26,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489013033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:26,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712202622] [2022-11-16 11:48:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:26,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:26,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:26,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:26,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:48:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:48:26,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:26,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:26,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712202622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:26,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:26,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:48:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936574983] [2022-11-16 11:48:26,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:26,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:48:26,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:48:26,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:48:26,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 325 [2022-11-16 11:48:26,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 279 transitions, 615 flow. Second operand has 12 states, 12 states have (on average 283.6666666666667) internal successors, (3404), 12 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states 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 11:48:26,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:26,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 325 [2022-11-16 11:48:26,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:27,663 INFO L130 PetriNetUnfolder]: 46/1092 cut-off events. [2022-11-16 11:48:27,664 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-16 11:48:27,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1092 events. 46/1092 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 5854 event pairs, 0 based on Foata normal form. 6/928 useless extension candidates. Maximal degree in co-relation 820. Up to 22 conditions per place. [2022-11-16 11:48:27,684 INFO L137 encePairwiseOnDemand]: 310/325 looper letters, 71 selfloop transitions, 40 changer transitions 0/356 dead transitions. [2022-11-16 11:48:27,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 356 transitions, 1057 flow [2022-11-16 11:48:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:48:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:48:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5175 transitions. [2022-11-16 11:48:27,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8846153846153846 [2022-11-16 11:48:27,695 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5175 transitions. [2022-11-16 11:48:27,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5175 transitions. [2022-11-16 11:48:27,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:27,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5175 transitions. [2022-11-16 11:48:27,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 287.5) internal successors, (5175), 18 states have internal predecessors, (5175), 0 states have call successors, (0), 0 states 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 11:48:27,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 11:48:27,756 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 11:48:27,756 INFO L175 Difference]: Start difference. First operand has 277 places, 279 transitions, 615 flow. Second operand 18 states and 5175 transitions. [2022-11-16 11:48:27,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 356 transitions, 1057 flow [2022-11-16 11:48:27,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 356 transitions, 1052 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:48:27,768 INFO L231 Difference]: Finished difference. Result has 293 places, 306 transitions, 848 flow [2022-11-16 11:48:27,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=848, PETRI_PLACES=293, PETRI_TRANSITIONS=306} [2022-11-16 11:48:27,770 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 20 predicate places. [2022-11-16 11:48:27,770 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 306 transitions, 848 flow [2022-11-16 11:48:27,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 283.6666666666667) internal successors, (3404), 12 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states 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 11:48:27,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:27,774 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:27,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:48:27,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:27,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash -217273840, now seen corresponding path program 1 times [2022-11-16 11:48:27,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:27,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937741671] [2022-11-16 11:48:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:27,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:28,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937741671] [2022-11-16 11:48:28,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937741671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163889205] [2022-11-16 11:48:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:28,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:28,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:28,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:28,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:48:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:28,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:48:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:28,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:48:28,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163889205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:28,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:48:28,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:48:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329065199] [2022-11-16 11:48:28,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:28,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:48:28,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:28,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:48:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:48:28,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 325 [2022-11-16 11:48:28,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 306 transitions, 848 flow. Second operand has 6 states, 6 states have (on average 283.3333333333333) internal successors, (1700), 6 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 11:48:28,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:28,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 325 [2022-11-16 11:48:28,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:28,764 INFO L130 PetriNetUnfolder]: 46/1084 cut-off events. [2022-11-16 11:48:28,765 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-16 11:48:28,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1313 conditions, 1084 events. 46/1084 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 5803 event pairs, 0 based on Foata normal form. 8/922 useless extension candidates. Maximal degree in co-relation 1019. Up to 44 conditions per place. [2022-11-16 11:48:28,781 INFO L137 encePairwiseOnDemand]: 314/325 looper letters, 39 selfloop transitions, 27 changer transitions 0/311 dead transitions. [2022-11-16 11:48:28,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 311 transitions, 960 flow [2022-11-16 11:48:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:48:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:48:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2014 transitions. [2022-11-16 11:48:28,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8852747252747253 [2022-11-16 11:48:28,786 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2014 transitions. [2022-11-16 11:48:28,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2014 transitions. [2022-11-16 11:48:28,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:28,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2014 transitions. [2022-11-16 11:48:28,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 287.7142857142857) internal successors, (2014), 7 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states 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 11:48:28,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:28,798 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:28,798 INFO L175 Difference]: Start difference. First operand has 293 places, 306 transitions, 848 flow. Second operand 7 states and 2014 transitions. [2022-11-16 11:48:28,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 311 transitions, 960 flow [2022-11-16 11:48:28,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 311 transitions, 886 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-16 11:48:28,808 INFO L231 Difference]: Finished difference. Result has 288 places, 298 transitions, 774 flow [2022-11-16 11:48:28,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=774, PETRI_PLACES=288, PETRI_TRANSITIONS=298} [2022-11-16 11:48:28,810 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 15 predicate places. [2022-11-16 11:48:28,810 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 298 transitions, 774 flow [2022-11-16 11:48:28,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 283.3333333333333) internal successors, (1700), 6 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 11:48:28,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:28,811 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:28,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:48:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-16 11:48:29,019 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash 136033972, now seen corresponding path program 1 times [2022-11-16 11:48:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:29,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531940383] [2022-11-16 11:48:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:29,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:29,345 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 11:48:29,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:29,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531940383] [2022-11-16 11:48:29,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531940383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:29,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:29,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:48:29,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382643357] [2022-11-16 11:48:29,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:29,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:48:29,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:48:29,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:48:29,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 325 [2022-11-16 11:48:29,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 298 transitions, 774 flow. Second operand has 11 states, 11 states have (on average 235.0909090909091) internal successors, (2586), 11 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states 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 11:48:29,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:29,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 325 [2022-11-16 11:48:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:31,652 INFO L130 PetriNetUnfolder]: 1031/10066 cut-off events. [2022-11-16 11:48:31,652 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2022-11-16 11:48:31,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11751 conditions, 10066 events. 1031/10066 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 117132 event pairs, 480 based on Foata normal form. 0/7996 useless extension candidates. Maximal degree in co-relation 9374. Up to 598 conditions per place. [2022-11-16 11:48:31,779 INFO L137 encePairwiseOnDemand]: 307/325 looper letters, 113 selfloop transitions, 21 changer transitions 0/355 dead transitions. [2022-11-16 11:48:31,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 355 transitions, 1208 flow [2022-11-16 11:48:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:48:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-16 11:48:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3825 transitions. [2022-11-16 11:48:31,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7355769230769231 [2022-11-16 11:48:31,790 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3825 transitions. [2022-11-16 11:48:31,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3825 transitions. [2022-11-16 11:48:31,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:31,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3825 transitions. [2022-11-16 11:48:31,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 239.0625) internal successors, (3825), 16 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states 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 11:48:31,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 325.0) internal successors, (5525), 17 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states 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 11:48:31,816 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 325.0) internal successors, (5525), 17 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states 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 11:48:31,816 INFO L175 Difference]: Start difference. First operand has 288 places, 298 transitions, 774 flow. Second operand 16 states and 3825 transitions. [2022-11-16 11:48:31,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 355 transitions, 1208 flow [2022-11-16 11:48:31,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 355 transitions, 1164 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:48:31,827 INFO L231 Difference]: Finished difference. Result has 306 places, 306 transitions, 843 flow [2022-11-16 11:48:31,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=843, PETRI_PLACES=306, PETRI_TRANSITIONS=306} [2022-11-16 11:48:31,831 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 33 predicate places. [2022-11-16 11:48:31,832 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 306 transitions, 843 flow [2022-11-16 11:48:31,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 235.0909090909091) internal successors, (2586), 11 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states 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 11:48:31,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:31,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:31,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:48:31,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:31,835 INFO L85 PathProgramCache]: Analyzing trace with hash -77913376, now seen corresponding path program 1 times [2022-11-16 11:48:31,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:31,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199267795] [2022-11-16 11:48:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:31,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:32,109 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 11:48:32,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199267795] [2022-11-16 11:48:32,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199267795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:32,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:32,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:48:32,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103637205] [2022-11-16 11:48:32,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:32,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:48:32,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:32,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:48:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:48:32,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-11-16 11:48:32,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 306 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 263.25) internal successors, (2106), 8 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states 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 11:48:32,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:32,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-11-16 11:48:32,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:34,138 INFO L130 PetriNetUnfolder]: 937/9275 cut-off events. [2022-11-16 11:48:34,138 INFO L131 PetriNetUnfolder]: For 682/682 co-relation queries the response was YES. [2022-11-16 11:48:34,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11200 conditions, 9275 events. 937/9275 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 105912 event pairs, 319 based on Foata normal form. 61/7670 useless extension candidates. Maximal degree in co-relation 9772. Up to 860 conditions per place. [2022-11-16 11:48:34,227 INFO L137 encePairwiseOnDemand]: 311/325 looper letters, 86 selfloop transitions, 15 changer transitions 0/333 dead transitions. [2022-11-16 11:48:34,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 333 transitions, 1129 flow [2022-11-16 11:48:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:48:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:48:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2937 transitions. [2022-11-16 11:48:34,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8215384615384616 [2022-11-16 11:48:34,236 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2937 transitions. [2022-11-16 11:48:34,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2937 transitions. [2022-11-16 11:48:34,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:34,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2937 transitions. [2022-11-16 11:48:34,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states 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 11:48:34,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 325.0) internal successors, (3900), 12 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states 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 11:48:34,257 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 325.0) internal successors, (3900), 12 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states 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 11:48:34,257 INFO L175 Difference]: Start difference. First operand has 306 places, 306 transitions, 843 flow. Second operand 11 states and 2937 transitions. [2022-11-16 11:48:34,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 333 transitions, 1129 flow [2022-11-16 11:48:34,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 333 transitions, 1123 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:48:34,275 INFO L231 Difference]: Finished difference. Result has 317 places, 310 transitions, 909 flow [2022-11-16 11:48:34,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=909, PETRI_PLACES=317, PETRI_TRANSITIONS=310} [2022-11-16 11:48:34,277 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 44 predicate places. [2022-11-16 11:48:34,277 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 310 transitions, 909 flow [2022-11-16 11:48:34,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 263.25) internal successors, (2106), 8 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states 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 11:48:34,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:34,279 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:34,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:48:34,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash -641400544, now seen corresponding path program 2 times [2022-11-16 11:48:34,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:34,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173192317] [2022-11-16 11:48:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:34,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:34,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173192317] [2022-11-16 11:48:34,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173192317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:34,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903040041] [2022-11-16 11:48:34,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:48:34,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:34,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:34,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:48:34,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:48:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:34,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:48:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:48:34,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:48:35,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903040041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:35,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:35,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 11:48:35,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236526850] [2022-11-16 11:48:35,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:35,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:48:35,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:35,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:48:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:48:35,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 325 [2022-11-16 11:48:35,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 310 transitions, 909 flow. Second operand has 18 states, 18 states have (on average 255.61111111111111) internal successors, (4601), 18 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states 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 11:48:35,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:35,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 325 [2022-11-16 11:48:35,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:39,101 INFO L130 PetriNetUnfolder]: 1313/12951 cut-off events. [2022-11-16 11:48:39,102 INFO L131 PetriNetUnfolder]: For 1378/1378 co-relation queries the response was YES. [2022-11-16 11:48:39,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16165 conditions, 12951 events. 1313/12951 cut-off events. For 1378/1378 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 154142 event pairs, 611 based on Foata normal form. 6/10627 useless extension candidates. Maximal degree in co-relation 13985. Up to 295 conditions per place. [2022-11-16 11:48:39,244 INFO L137 encePairwiseOnDemand]: 305/325 looper letters, 223 selfloop transitions, 65 changer transitions 0/506 dead transitions. [2022-11-16 11:48:39,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 506 transitions, 2267 flow [2022-11-16 11:48:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:48:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:48:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 12607 transitions. [2022-11-16 11:48:39,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916483516483517 [2022-11-16 11:48:39,278 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 12607 transitions. [2022-11-16 11:48:39,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 12607 transitions. [2022-11-16 11:48:39,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:39,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 12607 transitions. [2022-11-16 11:48:39,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 257.2857142857143) internal successors, (12607), 49 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states 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 11:48:39,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 325.0) internal successors, (16250), 50 states have internal predecessors, (16250), 0 states have call successors, (0), 0 states 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 11:48:39,355 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 325.0) internal successors, (16250), 50 states have internal predecessors, (16250), 0 states have call successors, (0), 0 states 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 11:48:39,356 INFO L175 Difference]: Start difference. First operand has 317 places, 310 transitions, 909 flow. Second operand 49 states and 12607 transitions. [2022-11-16 11:48:39,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 506 transitions, 2267 flow [2022-11-16 11:48:39,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 506 transitions, 2241 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:48:39,376 INFO L231 Difference]: Finished difference. Result has 362 places, 333 transitions, 1164 flow [2022-11-16 11:48:39,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1164, PETRI_PLACES=362, PETRI_TRANSITIONS=333} [2022-11-16 11:48:39,379 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 89 predicate places. [2022-11-16 11:48:39,380 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 333 transitions, 1164 flow [2022-11-16 11:48:39,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 255.61111111111111) internal successors, (4601), 18 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states 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 11:48:39,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:39,382 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:39,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:39,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:39,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash 129225358, now seen corresponding path program 1 times [2022-11-16 11:48:39,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:39,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629720999] [2022-11-16 11:48:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:39,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:39,927 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 11:48:39,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:39,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629720999] [2022-11-16 11:48:39,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629720999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:39,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:39,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 11:48:39,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68088384] [2022-11-16 11:48:39,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:39,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:48:39,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:48:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:48:39,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 325 [2022-11-16 11:48:39,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 333 transitions, 1164 flow. Second operand has 12 states, 12 states have (on average 234.91666666666666) internal successors, (2819), 12 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states 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 11:48:39,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:39,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 325 [2022-11-16 11:48:39,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:42,608 INFO L130 PetriNetUnfolder]: 1293/12776 cut-off events. [2022-11-16 11:48:42,609 INFO L131 PetriNetUnfolder]: For 1637/1637 co-relation queries the response was YES. [2022-11-16 11:48:42,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15993 conditions, 12776 events. 1293/12776 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 151712 event pairs, 533 based on Foata normal form. 21/10501 useless extension candidates. Maximal degree in co-relation 13949. Up to 1346 conditions per place. [2022-11-16 11:48:42,706 INFO L137 encePairwiseOnDemand]: 305/325 looper letters, 103 selfloop transitions, 36 changer transitions 0/364 dead transitions. [2022-11-16 11:48:42,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 364 transitions, 1539 flow [2022-11-16 11:48:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:48:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:48:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4269 transitions. [2022-11-16 11:48:42,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7297435897435898 [2022-11-16 11:48:42,713 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4269 transitions. [2022-11-16 11:48:42,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4269 transitions. [2022-11-16 11:48:42,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:42,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4269 transitions. [2022-11-16 11:48:42,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 237.16666666666666) internal successors, (4269), 18 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states 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 11:48:42,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 11:48:42,733 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 11:48:42,734 INFO L175 Difference]: Start difference. First operand has 362 places, 333 transitions, 1164 flow. Second operand 18 states and 4269 transitions. [2022-11-16 11:48:42,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 364 transitions, 1539 flow [2022-11-16 11:48:42,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 364 transitions, 1426 flow, removed 15 selfloop flow, removed 19 redundant places. [2022-11-16 11:48:42,752 INFO L231 Difference]: Finished difference. Result has 363 places, 335 transitions, 1158 flow [2022-11-16 11:48:42,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1158, PETRI_PLACES=363, PETRI_TRANSITIONS=335} [2022-11-16 11:48:42,754 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 90 predicate places. [2022-11-16 11:48:42,754 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 335 transitions, 1158 flow [2022-11-16 11:48:42,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 234.91666666666666) internal successors, (2819), 12 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states 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 11:48:42,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:42,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:42,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:48:42,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:42,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872949, now seen corresponding path program 1 times [2022-11-16 11:48:42,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:42,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609585038] [2022-11-16 11:48:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:42,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:43,080 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 11:48:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:43,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609585038] [2022-11-16 11:48:43,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609585038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825039205] [2022-11-16 11:48:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:43,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:43,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:43,084 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:43,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:48:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:48:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:48:43,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:48:43,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825039205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:43,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:48:43,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2022-11-16 11:48:43,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699838152] [2022-11-16 11:48:43,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:43,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:48:43,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:48:43,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:48:43,624 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 325 [2022-11-16 11:48:43,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 335 transitions, 1158 flow. Second operand has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states 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 11:48:43,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:43,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 325 [2022-11-16 11:48:43,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:45,908 INFO L130 PetriNetUnfolder]: 1250/13432 cut-off events. [2022-11-16 11:48:45,908 INFO L131 PetriNetUnfolder]: For 2561/2561 co-relation queries the response was YES. [2022-11-16 11:48:46,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16174 conditions, 13432 events. 1250/13432 cut-off events. For 2561/2561 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 162725 event pairs, 520 based on Foata normal form. 98/11082 useless extension candidates. Maximal degree in co-relation 15356. Up to 1476 conditions per place. [2022-11-16 11:48:46,069 INFO L137 encePairwiseOnDemand]: 311/325 looper letters, 56 selfloop transitions, 22 changer transitions 0/330 dead transitions. [2022-11-16 11:48:46,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 330 transitions, 1260 flow [2022-11-16 11:48:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:48:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:48:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2659 transitions. [2022-11-16 11:48:46,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7437762237762238 [2022-11-16 11:48:46,080 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2659 transitions. [2022-11-16 11:48:46,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2659 transitions. [2022-11-16 11:48:46,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:46,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2659 transitions. [2022-11-16 11:48:46,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 241.72727272727272) internal successors, (2659), 11 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states 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 11:48:46,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 325.0) internal successors, (3900), 12 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states 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 11:48:46,101 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 325.0) internal successors, (3900), 12 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states 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 11:48:46,102 INFO L175 Difference]: Start difference. First operand has 363 places, 335 transitions, 1158 flow. Second operand 11 states and 2659 transitions. [2022-11-16 11:48:46,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 330 transitions, 1260 flow [2022-11-16 11:48:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 330 transitions, 1186 flow, removed 1 selfloop flow, removed 19 redundant places. [2022-11-16 11:48:46,117 INFO L231 Difference]: Finished difference. Result has 351 places, 330 transitions, 1074 flow [2022-11-16 11:48:46,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1074, PETRI_PLACES=351, PETRI_TRANSITIONS=330} [2022-11-16 11:48:46,122 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 78 predicate places. [2022-11-16 11:48:46,123 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 330 transitions, 1074 flow [2022-11-16 11:48:46,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states 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 11:48:46,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:46,124 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:46,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:46,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:46,331 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1278009817, now seen corresponding path program 1 times [2022-11-16 11:48:46,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:46,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107772807] [2022-11-16 11:48:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:46,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:46,768 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 11:48:46,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107772807] [2022-11-16 11:48:46,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107772807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087818613] [2022-11-16 11:48:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:46,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:46,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:46,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:46,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:48:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:48:46,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:48:47,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:48:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087818613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:47,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:48:47,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 20 [2022-11-16 11:48:47,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271643291] [2022-11-16 11:48:47,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:47,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:48:47,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:47,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:48:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:48:47,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 325 [2022-11-16 11:48:47,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 330 transitions, 1074 flow. Second operand has 9 states, 9 states have (on average 241.11111111111111) internal successors, (2170), 9 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states 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 11:48:47,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:47,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 325 [2022-11-16 11:48:47,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:49,470 INFO L130 PetriNetUnfolder]: 1058/11476 cut-off events. [2022-11-16 11:48:49,470 INFO L131 PetriNetUnfolder]: For 912/912 co-relation queries the response was YES. [2022-11-16 11:48:49,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13458 conditions, 11476 events. 1058/11476 cut-off events. For 912/912 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 133447 event pairs, 430 based on Foata normal form. 108/9484 useless extension candidates. Maximal degree in co-relation 11618. Up to 1213 conditions per place. [2022-11-16 11:48:49,631 INFO L137 encePairwiseOnDemand]: 307/325 looper letters, 45 selfloop transitions, 29 changer transitions 0/326 dead transitions. [2022-11-16 11:48:49,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 326 transitions, 1192 flow [2022-11-16 11:48:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:48:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:48:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3131 transitions. [2022-11-16 11:48:49,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7410650887573964 [2022-11-16 11:48:49,646 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3131 transitions. [2022-11-16 11:48:49,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3131 transitions. [2022-11-16 11:48:49,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:49,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3131 transitions. [2022-11-16 11:48:49,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 240.84615384615384) internal successors, (3131), 13 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states 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 11:48:49,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 325.0) internal successors, (4550), 14 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states 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 11:48:49,673 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 325.0) internal successors, (4550), 14 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states 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 11:48:49,673 INFO L175 Difference]: Start difference. First operand has 351 places, 330 transitions, 1074 flow. Second operand 13 states and 3131 transitions. [2022-11-16 11:48:49,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 326 transitions, 1192 flow [2022-11-16 11:48:49,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 326 transitions, 1126 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-11-16 11:48:49,685 INFO L231 Difference]: Finished difference. Result has 345 places, 326 transitions, 1036 flow [2022-11-16 11:48:49,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1036, PETRI_PLACES=345, PETRI_TRANSITIONS=326} [2022-11-16 11:48:49,687 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 72 predicate places. [2022-11-16 11:48:49,687 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 326 transitions, 1036 flow [2022-11-16 11:48:49,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 241.11111111111111) internal successors, (2170), 9 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states 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 11:48:49,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:49,688 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:49,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:49,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:48:49,893 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 27620158, now seen corresponding path program 1 times [2022-11-16 11:48:49,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253059892] [2022-11-16 11:48:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:49,964 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 11:48:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253059892] [2022-11-16 11:48:49,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253059892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:49,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:49,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:48:49,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261442602] [2022-11-16 11:48:49,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:49,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:48:49,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:48:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:48:49,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 325 [2022-11-16 11:48:49,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 326 transitions, 1036 flow. Second operand has 4 states, 4 states have (on average 292.75) internal successors, (1171), 4 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states 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 11:48:49,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:49,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 325 [2022-11-16 11:48:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:51,163 INFO L130 PetriNetUnfolder]: 702/8038 cut-off events. [2022-11-16 11:48:51,164 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2022-11-16 11:48:51,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10556 conditions, 8038 events. 702/8038 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 88411 event pairs, 184 based on Foata normal form. 0/6746 useless extension candidates. Maximal degree in co-relation 9016. Up to 797 conditions per place. [2022-11-16 11:48:51,248 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 28 selfloop transitions, 4 changer transitions 0/341 dead transitions. [2022-11-16 11:48:51,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 341 transitions, 1137 flow [2022-11-16 11:48:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:48:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:48:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1489 transitions. [2022-11-16 11:48:51,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9163076923076923 [2022-11-16 11:48:51,252 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1489 transitions. [2022-11-16 11:48:51,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1489 transitions. [2022-11-16 11:48:51,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:51,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1489 transitions. [2022-11-16 11:48:51,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.8) internal successors, (1489), 5 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states 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 11:48:51,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 11:48:51,259 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 11:48:51,260 INFO L175 Difference]: Start difference. First operand has 345 places, 326 transitions, 1036 flow. Second operand 5 states and 1489 transitions. [2022-11-16 11:48:51,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 341 transitions, 1137 flow [2022-11-16 11:48:51,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 341 transitions, 1079 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-16 11:48:51,269 INFO L231 Difference]: Finished difference. Result has 340 places, 329 transitions, 1008 flow [2022-11-16 11:48:51,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1008, PETRI_PLACES=340, PETRI_TRANSITIONS=329} [2022-11-16 11:48:51,270 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 67 predicate places. [2022-11-16 11:48:51,270 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 329 transitions, 1008 flow [2022-11-16 11:48:51,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.75) internal successors, (1171), 4 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states 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 11:48:51,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:51,271 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:51,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:48:51,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2070988648, now seen corresponding path program 1 times [2022-11-16 11:48:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965067843] [2022-11-16 11:48:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:51,350 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 11:48:51,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:51,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965067843] [2022-11-16 11:48:51,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965067843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:51,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:51,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:48:51,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072694327] [2022-11-16 11:48:51,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:51,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:48:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:48:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:48:51,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 325 [2022-11-16 11:48:51,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 329 transitions, 1008 flow. Second operand has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states 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 11:48:51,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:51,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 325 [2022-11-16 11:48:51,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:53,197 INFO L130 PetriNetUnfolder]: 1212/11504 cut-off events. [2022-11-16 11:48:53,197 INFO L131 PetriNetUnfolder]: For 958/972 co-relation queries the response was YES. [2022-11-16 11:48:53,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14047 conditions, 11504 events. 1212/11504 cut-off events. For 958/972 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 144422 event pairs, 486 based on Foata normal form. 0/9402 useless extension candidates. Maximal degree in co-relation 12030. Up to 1009 conditions per place. [2022-11-16 11:48:53,375 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 27 selfloop transitions, 4 changer transitions 0/343 dead transitions. [2022-11-16 11:48:53,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 343 transitions, 1101 flow [2022-11-16 11:48:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:48:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:48:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1488 transitions. [2022-11-16 11:48:53,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9156923076923077 [2022-11-16 11:48:53,378 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1488 transitions. [2022-11-16 11:48:53,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1488 transitions. [2022-11-16 11:48:53,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:53,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1488 transitions. [2022-11-16 11:48:53,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.6) internal successors, (1488), 5 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states 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 11:48:53,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 11:48:53,386 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 11:48:53,386 INFO L175 Difference]: Start difference. First operand has 340 places, 329 transitions, 1008 flow. Second operand 5 states and 1488 transitions. [2022-11-16 11:48:53,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 343 transitions, 1101 flow [2022-11-16 11:48:53,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 343 transitions, 1099 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:48:53,397 INFO L231 Difference]: Finished difference. Result has 346 places, 332 transitions, 1036 flow [2022-11-16 11:48:53,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1036, PETRI_PLACES=346, PETRI_TRANSITIONS=332} [2022-11-16 11:48:53,399 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 73 predicate places. [2022-11-16 11:48:53,399 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 332 transitions, 1036 flow [2022-11-16 11:48:53,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states 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 11:48:53,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:53,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:53,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:48:53,400 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2068493101, now seen corresponding path program 1 times [2022-11-16 11:48:53,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:53,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774281387] [2022-11-16 11:48:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:53,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:53,526 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 11:48:53,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:53,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774281387] [2022-11-16 11:48:53,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774281387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:53,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:53,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:48:53,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096361849] [2022-11-16 11:48:53,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:53,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:48:53,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:48:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:48:53,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 325 [2022-11-16 11:48:53,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 332 transitions, 1036 flow. Second operand has 7 states, 7 states have (on average 262.0) internal successors, (1834), 7 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states 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 11:48:53,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:53,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 325 [2022-11-16 11:48:53,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:57,627 INFO L130 PetriNetUnfolder]: 3032/32042 cut-off events. [2022-11-16 11:48:57,627 INFO L131 PetriNetUnfolder]: For 1650/1706 co-relation queries the response was YES. [2022-11-16 11:48:57,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38945 conditions, 32042 events. 3032/32042 cut-off events. For 1650/1706 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 456889 event pairs, 1098 based on Foata normal form. 0/26603 useless extension candidates. Maximal degree in co-relation 35219. Up to 2701 conditions per place. [2022-11-16 11:48:57,964 INFO L137 encePairwiseOnDemand]: 314/325 looper letters, 120 selfloop transitions, 22 changer transitions 2/382 dead transitions. [2022-11-16 11:48:57,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 382 transitions, 1524 flow [2022-11-16 11:48:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:48:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:48:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2663 transitions. [2022-11-16 11:48:57,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8193846153846154 [2022-11-16 11:48:57,969 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2663 transitions. [2022-11-16 11:48:57,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2663 transitions. [2022-11-16 11:48:57,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:57,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2663 transitions. [2022-11-16 11:48:57,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 266.3) internal successors, (2663), 10 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states 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 11:48:57,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states 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 11:48:57,979 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states 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 11:48:57,979 INFO L175 Difference]: Start difference. First operand has 346 places, 332 transitions, 1036 flow. Second operand 10 states and 2663 transitions. [2022-11-16 11:48:57,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 382 transitions, 1524 flow [2022-11-16 11:48:58,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 382 transitions, 1522 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:48:58,006 INFO L231 Difference]: Finished difference. Result has 356 places, 333 transitions, 1091 flow [2022-11-16 11:48:58,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1091, PETRI_PLACES=356, PETRI_TRANSITIONS=333} [2022-11-16 11:48:58,008 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 83 predicate places. [2022-11-16 11:48:58,008 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 333 transitions, 1091 flow [2022-11-16 11:48:58,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 262.0) internal successors, (1834), 7 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states 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 11:48:58,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:58,009 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:58,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:48:58,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:48:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2123285769, now seen corresponding path program 1 times [2022-11-16 11:48:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:58,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452173895] [2022-11-16 11:48:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:58,164 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 11:48:58,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452173895] [2022-11-16 11:48:58,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452173895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:58,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:58,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:48:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270944617] [2022-11-16 11:48:58,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:58,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:48:58,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:58,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:48:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:48:58,170 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 325 [2022-11-16 11:48:58,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 333 transitions, 1091 flow. Second operand has 7 states, 7 states have (on average 262.14285714285717) internal successors, (1835), 7 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states 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 11:48:58,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:58,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 325 [2022-11-16 11:48:58,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:00,703 INFO L130 PetriNetUnfolder]: 2192/16327 cut-off events. [2022-11-16 11:49:00,704 INFO L131 PetriNetUnfolder]: For 1940/1940 co-relation queries the response was YES. [2022-11-16 11:49:00,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22065 conditions, 16327 events. 2192/16327 cut-off events. For 1940/1940 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 199469 event pairs, 1289 based on Foata normal form. 0/13900 useless extension candidates. Maximal degree in co-relation 20047. Up to 2883 conditions per place. [2022-11-16 11:49:00,893 INFO L137 encePairwiseOnDemand]: 314/325 looper letters, 94 selfloop transitions, 21 changer transitions 28/381 dead transitions. [2022-11-16 11:49:00,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 381 transitions, 1570 flow [2022-11-16 11:49:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:49:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:49:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2661 transitions. [2022-11-16 11:49:00,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8187692307692308 [2022-11-16 11:49:00,897 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2661 transitions. [2022-11-16 11:49:00,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2661 transitions. [2022-11-16 11:49:00,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:00,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2661 transitions. [2022-11-16 11:49:00,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 266.1) internal successors, (2661), 10 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states 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 11:49:00,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states 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 11:49:00,909 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states 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 11:49:00,909 INFO L175 Difference]: Start difference. First operand has 356 places, 333 transitions, 1091 flow. Second operand 10 states and 2661 transitions. [2022-11-16 11:49:00,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 381 transitions, 1570 flow [2022-11-16 11:49:00,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 381 transitions, 1531 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 11:49:00,925 INFO L231 Difference]: Finished difference. Result has 360 places, 332 transitions, 1093 flow [2022-11-16 11:49:00,926 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1093, PETRI_PLACES=360, PETRI_TRANSITIONS=332} [2022-11-16 11:49:00,927 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 87 predicate places. [2022-11-16 11:49:00,927 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 332 transitions, 1093 flow [2022-11-16 11:49:00,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 262.14285714285717) internal successors, (1835), 7 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states 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 11:49:00,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:00,928 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:00,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:49:00,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:49:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:00,929 INFO L85 PathProgramCache]: Analyzing trace with hash 82975452, now seen corresponding path program 1 times [2022-11-16 11:49:00,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:00,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491284604] [2022-11-16 11:49:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:01,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:01,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491284604] [2022-11-16 11:49:01,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491284604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:01,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:01,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:49:01,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684640060] [2022-11-16 11:49:01,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:01,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:49:01,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:01,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:49:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:49:01,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 325 [2022-11-16 11:49:01,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 332 transitions, 1093 flow. Second operand has 7 states, 7 states have (on average 262.57142857142856) internal successors, (1838), 7 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states 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 11:49:01,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:01,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 325 [2022-11-16 11:49:01,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:04,448 INFO L130 PetriNetUnfolder]: 2324/25992 cut-off events. [2022-11-16 11:49:04,448 INFO L131 PetriNetUnfolder]: For 1793/1865 co-relation queries the response was YES. [2022-11-16 11:49:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31531 conditions, 25992 events. 2324/25992 cut-off events. For 1793/1865 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 362719 event pairs, 1002 based on Foata normal form. 9/21984 useless extension candidates. Maximal degree in co-relation 30833. Up to 2356 conditions per place. [2022-11-16 11:49:04,733 INFO L137 encePairwiseOnDemand]: 316/325 looper letters, 98 selfloop transitions, 15 changer transitions 2/353 dead transitions. [2022-11-16 11:49:04,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 353 transitions, 1385 flow [2022-11-16 11:49:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:49:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:49:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2135 transitions. [2022-11-16 11:49:04,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8211538461538461 [2022-11-16 11:49:04,737 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2135 transitions. [2022-11-16 11:49:04,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2135 transitions. [2022-11-16 11:49:04,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:04,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2135 transitions. [2022-11-16 11:49:04,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 266.875) internal successors, (2135), 8 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states 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 11:49:04,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states 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 11:49:04,745 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states 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 11:49:04,745 INFO L175 Difference]: Start difference. First operand has 360 places, 332 transitions, 1093 flow. Second operand 8 states and 2135 transitions. [2022-11-16 11:49:04,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 353 transitions, 1385 flow [2022-11-16 11:49:04,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 353 transitions, 1332 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-11-16 11:49:04,777 INFO L231 Difference]: Finished difference. Result has 356 places, 333 transitions, 1087 flow [2022-11-16 11:49:04,778 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=356, PETRI_TRANSITIONS=333} [2022-11-16 11:49:04,778 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 83 predicate places. [2022-11-16 11:49:04,779 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 333 transitions, 1087 flow [2022-11-16 11:49:04,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 262.57142857142856) internal successors, (1838), 7 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states 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 11:49:04,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:04,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:04,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:49:04,780 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:49:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash 26290258, now seen corresponding path program 1 times [2022-11-16 11:49:04,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358944267] [2022-11-16 11:49:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:04,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:04,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358944267] [2022-11-16 11:49:04,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358944267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:04,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:04,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:49:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565131914] [2022-11-16 11:49:04,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:04,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:49:04,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:04,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:49:04,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:49:04,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 325 [2022-11-16 11:49:04,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 333 transitions, 1087 flow. Second operand has 7 states, 7 states have (on average 262.7142857142857) internal successors, (1839), 7 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states 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 11:49:04,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:04,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 325 [2022-11-16 11:49:04,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:06,693 INFO L130 PetriNetUnfolder]: 1663/12205 cut-off events. [2022-11-16 11:49:06,694 INFO L131 PetriNetUnfolder]: For 1694/1694 co-relation queries the response was YES. [2022-11-16 11:49:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16652 conditions, 12205 events. 1663/12205 cut-off events. For 1694/1694 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 141930 event pairs, 1012 based on Foata normal form. 0/10372 useless extension candidates. Maximal degree in co-relation 15962. Up to 2512 conditions per place. [2022-11-16 11:49:06,803 INFO L137 encePairwiseOnDemand]: 316/325 looper letters, 82 selfloop transitions, 13 changer transitions 19/352 dead transitions. [2022-11-16 11:49:06,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 352 transitions, 1366 flow [2022-11-16 11:49:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:49:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:49:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2133 transitions. [2022-11-16 11:49:06,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8203846153846154 [2022-11-16 11:49:06,806 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2133 transitions. [2022-11-16 11:49:06,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2133 transitions. [2022-11-16 11:49:06,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:06,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2133 transitions. [2022-11-16 11:49:06,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 266.625) internal successors, (2133), 8 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states 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 11:49:06,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states 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 11:49:06,813 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states 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 11:49:06,814 INFO L175 Difference]: Start difference. First operand has 356 places, 333 transitions, 1087 flow. Second operand 8 states and 2133 transitions. [2022-11-16 11:49:06,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 352 transitions, 1366 flow [2022-11-16 11:49:06,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 352 transitions, 1339 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:49:06,827 INFO L231 Difference]: Finished difference. Result has 360 places, 331 transitions, 1073 flow [2022-11-16 11:49:06,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1073, PETRI_PLACES=360, PETRI_TRANSITIONS=331} [2022-11-16 11:49:06,828 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 87 predicate places. [2022-11-16 11:49:06,828 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 331 transitions, 1073 flow [2022-11-16 11:49:06,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 262.7142857142857) internal successors, (1839), 7 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states 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 11:49:06,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:06,829 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:06,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:49:06,829 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:49:06,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash -714306653, now seen corresponding path program 1 times [2022-11-16 11:49:06,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:06,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164726621] [2022-11-16 11:49:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:06,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:07,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164726621] [2022-11-16 11:49:07,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164726621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223542909] [2022-11-16 11:49:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:07,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:07,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:07,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:07,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:49:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:07,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:49:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:08,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:49:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:49:08,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:49:08,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:49:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:08,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:08,590 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_261) c_~a2~0.base) c_~a2~0.offset) 9223372039002259456)) is different from false [2022-11-16 11:49:08,627 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_main_#t~ret16#1.base|) |c_ULTIMATE.start_main_#t~ret16#1.offset|) 9223372039002259456)) is different from false [2022-11-16 11:49:08,700 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2022-11-16 11:49:08,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:49:08,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-16 11:49:08,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:49:08,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2022-11-16 11:49:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 11:49:09,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223542909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:09,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:09,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-11-16 11:49:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283472558] [2022-11-16 11:49:09,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:09,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:49:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:49:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1276, Unknown=10, NotChecked=222, Total=1640 [2022-11-16 11:49:09,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 325 [2022-11-16 11:49:09,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 331 transitions, 1073 flow. Second operand has 41 states, 41 states have (on average 228.97560975609755) internal successors, (9388), 41 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states 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 11:49:09,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:09,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 325 [2022-11-16 11:49:09,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:27,535 INFO L130 PetriNetUnfolder]: 17667/86886 cut-off events. [2022-11-16 11:49:27,535 INFO L131 PetriNetUnfolder]: For 2982/3126 co-relation queries the response was YES. [2022-11-16 11:49:28,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119981 conditions, 86886 events. 17667/86886 cut-off events. For 2982/3126 co-relation queries the response was YES. Maximal size of possible extension queue 1675. Compared 1364141 event pairs, 7217 based on Foata normal form. 0/74588 useless extension candidates. Maximal degree in co-relation 119236. Up to 13029 conditions per place. [2022-11-16 11:49:28,570 INFO L137 encePairwiseOnDemand]: 290/325 looper letters, 247 selfloop transitions, 57 changer transitions 0/518 dead transitions. [2022-11-16 11:49:28,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 518 transitions, 2099 flow [2022-11-16 11:49:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:49:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 11:49:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 6605 transitions. [2022-11-16 11:49:28,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7258241758241758 [2022-11-16 11:49:28,577 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 6605 transitions. [2022-11-16 11:49:28,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 6605 transitions. [2022-11-16 11:49:28,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:28,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 6605 transitions. [2022-11-16 11:49:28,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 235.89285714285714) internal successors, (6605), 28 states have internal predecessors, (6605), 0 states have call successors, (0), 0 states 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 11:49:28,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 325.0) internal successors, (9425), 29 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states 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 11:49:28,599 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 325.0) internal successors, (9425), 29 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states 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 11:49:28,600 INFO L175 Difference]: Start difference. First operand has 360 places, 331 transitions, 1073 flow. Second operand 28 states and 6605 transitions. [2022-11-16 11:49:28,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 518 transitions, 2099 flow [2022-11-16 11:49:28,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 518 transitions, 2059 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-11-16 11:49:28,648 INFO L231 Difference]: Finished difference. Result has 389 places, 373 transitions, 1384 flow [2022-11-16 11:49:28,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1384, PETRI_PLACES=389, PETRI_TRANSITIONS=373} [2022-11-16 11:49:28,649 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 116 predicate places. [2022-11-16 11:49:28,650 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 373 transitions, 1384 flow [2022-11-16 11:49:28,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 228.97560975609755) internal successors, (9388), 41 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states 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 11:49:28,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:28,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:28,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:28,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:49:28,857 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:49:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -668668937, now seen corresponding path program 1 times [2022-11-16 11:49:28,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781139733] [2022-11-16 11:49:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:28,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:49:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781139733] [2022-11-16 11:49:28,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781139733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:28,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:28,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:49:28,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969716609] [2022-11-16 11:49:28,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:28,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:49:28,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:49:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:49:28,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 325 [2022-11-16 11:49:28,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 373 transitions, 1384 flow. Second operand has 4 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 11:49:28,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:28,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 325 [2022-11-16 11:49:28,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:31,747 INFO L130 PetriNetUnfolder]: 819/10744 cut-off events. [2022-11-16 11:49:31,747 INFO L131 PetriNetUnfolder]: For 792/799 co-relation queries the response was YES. [2022-11-16 11:49:31,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15056 conditions, 10744 events. 819/10744 cut-off events. For 792/799 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 124572 event pairs, 228 based on Foata normal form. 77/9305 useless extension candidates. Maximal degree in co-relation 14957. Up to 862 conditions per place. [2022-11-16 11:49:31,852 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 40 selfloop transitions, 4 changer transitions 0/380 dead transitions. [2022-11-16 11:49:31,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 380 transitions, 1475 flow [2022-11-16 11:49:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:49:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:49:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1167 transitions. [2022-11-16 11:49:31,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8976923076923077 [2022-11-16 11:49:31,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1167 transitions. [2022-11-16 11:49:31,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1167 transitions. [2022-11-16 11:49:31,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:31,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1167 transitions. [2022-11-16 11:49:31,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.75) internal successors, (1167), 4 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 11:49:31,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 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 11:49:31,857 INFO L81 ComplementDD]: Finished complementDD. Result has 5 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 11:49:31,857 INFO L175 Difference]: Start difference. First operand has 389 places, 373 transitions, 1384 flow. Second operand 4 states and 1167 transitions. [2022-11-16 11:49:31,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 380 transitions, 1475 flow [2022-11-16 11:49:31,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 380 transitions, 1448 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 11:49:31,875 INFO L231 Difference]: Finished difference. Result has 387 places, 370 transitions, 1359 flow [2022-11-16 11:49:31,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1359, PETRI_PLACES=387, PETRI_TRANSITIONS=370} [2022-11-16 11:49:31,876 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 114 predicate places. [2022-11-16 11:49:31,877 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 370 transitions, 1359 flow [2022-11-16 11:49:31,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 11:49:31,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:31,877 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:31,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:49:31,878 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:49:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash -201057529, now seen corresponding path program 1 times [2022-11-16 11:49:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:31,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466060319] [2022-11-16 11:49:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:31,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:32,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:32,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466060319] [2022-11-16 11:49:32,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466060319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:32,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770552812] [2022-11-16 11:49:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:32,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:32,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:32,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:49:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:49:32,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:32,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:32,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770552812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:32,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:32,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-16 11:49:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139007138] [2022-11-16 11:49:32,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:32,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:49:32,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:49:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:49:32,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 325 [2022-11-16 11:49:32,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 370 transitions, 1359 flow. Second operand has 28 states, 28 states have (on average 245.42857142857142) internal successors, (6872), 28 states have internal predecessors, (6872), 0 states have call successors, (0), 0 states 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 11:49:32,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:32,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 325 [2022-11-16 11:49:32,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:42,399 INFO L130 PetriNetUnfolder]: 3412/40166 cut-off events. [2022-11-16 11:49:42,399 INFO L131 PetriNetUnfolder]: For 4419/4423 co-relation queries the response was YES. [2022-11-16 11:49:42,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54252 conditions, 40166 events. 3412/40166 cut-off events. For 4419/4423 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 617742 event pairs, 1486 based on Foata normal form. 0/34332 useless extension candidates. Maximal degree in co-relation 48916. Up to 2855 conditions per place. [2022-11-16 11:49:42,890 INFO L137 encePairwiseOnDemand]: 299/325 looper letters, 273 selfloop transitions, 75 changer transitions 9/595 dead transitions. [2022-11-16 11:49:42,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 595 transitions, 2863 flow [2022-11-16 11:49:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:49:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-16 11:49:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 12335 transitions. [2022-11-16 11:49:42,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7590769230769231 [2022-11-16 11:49:42,909 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 12335 transitions. [2022-11-16 11:49:42,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 12335 transitions. [2022-11-16 11:49:42,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:42,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 12335 transitions. [2022-11-16 11:49:42,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 246.7) internal successors, (12335), 50 states have internal predecessors, (12335), 0 states have call successors, (0), 0 states 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 11:49:42,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 325.0) internal successors, (16575), 51 states have internal predecessors, (16575), 0 states have call successors, (0), 0 states 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 11:49:42,958 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 325.0) internal successors, (16575), 51 states have internal predecessors, (16575), 0 states have call successors, (0), 0 states 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 11:49:42,959 INFO L175 Difference]: Start difference. First operand has 387 places, 370 transitions, 1359 flow. Second operand 50 states and 12335 transitions. [2022-11-16 11:49:42,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 595 transitions, 2863 flow [2022-11-16 11:49:43,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 595 transitions, 2861 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 11:49:43,078 INFO L231 Difference]: Finished difference. Result has 442 places, 401 transitions, 1752 flow [2022-11-16 11:49:43,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1752, PETRI_PLACES=442, PETRI_TRANSITIONS=401} [2022-11-16 11:49:43,079 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 169 predicate places. [2022-11-16 11:49:43,079 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 401 transitions, 1752 flow [2022-11-16 11:49:43,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 245.42857142857142) internal successors, (6872), 28 states have internal predecessors, (6872), 0 states have call successors, (0), 0 states 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 11:49:43,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:43,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:43,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:43,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:49:43,286 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-11-16 11:49:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:43,287 INFO L85 PathProgramCache]: Analyzing trace with hash -467614386, now seen corresponding path program 1 times [2022-11-16 11:49:43,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:43,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243489291] [2022-11-16 11:49:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:44,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:44,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243489291] [2022-11-16 11:49:44,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243489291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:44,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102400571] [2022-11-16 11:49:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:44,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:44,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:44,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:44,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c27d97f-07cb-452e-bd54-3588307cd4d4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:49:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:44,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:49:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:45,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:49:45,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:49:45,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:49:45,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:49:45,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:49:45,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:49:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:45,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:45,874 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int)) (v_ArrVal_338 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_338) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_main_#t~ret16#1.base|) |c_ULTIMATE.start_main_#t~ret16#1.offset|) 9223372039002259456)) is different from false [2022-11-16 11:49:45,883 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int)) (v_ArrVal_338 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_338) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456)) is different from false [2022-11-16 11:49:46,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:49:46,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-16 11:49:46,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:49:46,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 120 [2022-11-16 11:49:46,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 11:49:46,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-11-16 11:49:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:46,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102400571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:46,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:46,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-11-16 11:49:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265854151] [2022-11-16 11:49:46,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:46,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:49:46,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:49:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1712, Unknown=27, NotChecked=170, Total=2070 [2022-11-16 11:49:46,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 325 [2022-11-16 11:49:46,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 401 transitions, 1752 flow. Second operand has 46 states, 46 states have (on average 226.7173913043478) internal successors, (10429), 46 states have internal predecessors, (10429), 0 states have call successors, (0), 0 states 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 11:49:46,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:46,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 325 [2022-11-16 11:49:46,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand