./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8 --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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- 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-2329fc7 [2022-12-13 20:49:47,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:49:47,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:49:47,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:49:47,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:49:47,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:49:47,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:49:47,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:49:47,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:49:47,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:49:47,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:49:47,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:49:47,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:49:47,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:49:47,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:49:47,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:49:47,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:49:47,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:49:47,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:49:47,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:49:47,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:49:47,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:49:47,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:49:47,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:49:47,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:49:47,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:49:47,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:49:47,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:49:47,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:49:47,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:49:47,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:49:47,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:49:47,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:49:47,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:49:47,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:49:47,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:49:47,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:49:47,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:49:47,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:49:47,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:49:47,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:49:47,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 20:49:47,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:49:47,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:49:47,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:49:47,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:49:47,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:49:47,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:49:47,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:49:47,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 20:49:47,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 20:49:47,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:49:47,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:49:47,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:49:47,764 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-12-13 20:49:47,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:49:47,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:49:47,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:49:47,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:49:47,940 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:49:47,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-13 20:49:50,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:49:50,718 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:49:50,719 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-13 20:49:50,725 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/data/83df13887/ac2a164a0eb342d7843a2bb7169554c8/FLAGe7bf19cf1 [2022-12-13 20:49:50,735 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/data/83df13887/ac2a164a0eb342d7843a2bb7169554c8 [2022-12-13 20:49:50,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:49:50,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:49:50,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:49:50,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:49:50,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:49:50,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:50,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc2398e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50, skipping insertion in model container [2022-12-13 20:49:50,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:50,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:49:50,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:49:50,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,887 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,888 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,896 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,898 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,899 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,899 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,900 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,900 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,901 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,901 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,902 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,902 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,903 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,904 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,904 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,911 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-13 20:49:50,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:49:50,923 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:49:50,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,935 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,935 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 20:49:50,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 20:49:50,947 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-13 20:49:50,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:49:50,960 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:49:50,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50 WrapperNode [2022-12-13 20:49:50,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:49:50,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:49:50,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:49:50,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:49:50,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:50,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:50,996 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 365 [2022-12-13 20:49:50,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:49:50,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:49:50,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:49:50,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:49:51,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,024 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:49:51,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:49:51,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:49:51,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:49:51,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (1/1) ... [2022-12-13 20:49:51,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:49:51,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:49:51,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:49:51,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:49:51,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:49:51,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 20:49:51,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 20:49:51,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 20:49:51,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 20:49:51,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 20:49:51,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 20:49:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:49:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:49:51,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:49:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:49:51,092 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 20:49:51,184 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:49:51,186 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:49:51,611 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:49:51,914 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:49:51,914 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 20:49:51,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:49:51 BoogieIcfgContainer [2022-12-13 20:49:51,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:49:51,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:49:51,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:49:51,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:49:51,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:49:50" (1/3) ... [2022-12-13 20:49:51,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b654773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:49:51, skipping insertion in model container [2022-12-13 20:49:51,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:49:50" (2/3) ... [2022-12-13 20:49:51,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b654773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:49:51, skipping insertion in model container [2022-12-13 20:49:51,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:49:51" (3/3) ... [2022-12-13 20:49:51,924 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-12-13 20:49:51,940 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 20:49:51,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:49:51,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-13 20:49:51,952 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:49:52,132 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 20:49:52,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 274 places, 280 transitions, 592 flow [2022-12-13 20:49:52,224 INFO L130 PetriNetUnfolder]: 19/276 cut-off events. [2022-12-13 20:49:52,224 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 20:49:52,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 276 events. 19/276 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 292 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 230. Up to 2 conditions per place. [2022-12-13 20:49:52,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 274 places, 280 transitions, 592 flow [2022-12-13 20:49:52,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 253 transitions, 527 flow [2022-12-13 20:49:52,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:49:52,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 253 transitions, 527 flow [2022-12-13 20:49:52,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 253 transitions, 527 flow [2022-12-13 20:49:52,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 253 transitions, 527 flow [2022-12-13 20:49:52,291 INFO L130 PetriNetUnfolder]: 18/253 cut-off events. [2022-12-13 20:49:52,291 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 20:49:52,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 253 events. 18/253 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 293 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 230. Up to 2 conditions per place. [2022-12-13 20:49:52,294 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2022-12-13 20:50:08,959 INFO L134 LiptonReduction]: Checked pairs total: 9000 [2022-12-13 20:50:08,960 INFO L136 LiptonReduction]: Total number of compositions: 257 [2022-12-13 20:50:08,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:50:08,978 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;@7c45b5cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:50:08,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-12-13 20:50:08,983 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 20:50:08,983 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:50:08,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:50:08,984 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:50:08,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:50:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:50:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash 46244, now seen corresponding path program 1 times [2022-12-13 20:50:08,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:50:08,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464750977] [2022-12-13 20:50:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:50:08,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:50:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:50:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:50:09,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:50:09,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464750977] [2022-12-13 20:50:09,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464750977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:50:09,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:50:09,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:50:09,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442898643] [2022-12-13 20:50:09,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:50:09,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:50:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:50:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:50:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:50:09,275 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2022-12-13 20:50:09,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:09,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:50:09,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2022-12-13 20:50:09,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:50:14,958 INFO L130 PetriNetUnfolder]: 45452/56525 cut-off events. [2022-12-13 20:50:14,958 INFO L131 PetriNetUnfolder]: For 664/664 co-relation queries the response was YES. [2022-12-13 20:50:15,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113727 conditions, 56525 events. 45452/56525 cut-off events. For 664/664 co-relation queries the response was YES. Maximal size of possible extension queue 5154. Compared 313426 event pairs, 30300 based on Foata normal form. 0/16941 useless extension candidates. Maximal degree in co-relation 102115. Up to 55398 conditions per place. [2022-12-13 20:50:15,236 INFO L137 encePairwiseOnDemand]: 526/537 looper letters, 48 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-12-13 20:50:15,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 229 flow [2022-12-13 20:50:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:50:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:50:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2022-12-13 20:50:15,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44630664183736807 [2022-12-13 20:50:15,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2022-12-13 20:50:15,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2022-12-13 20:50:15,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:50:15,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2022-12-13 20:50:15,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:15,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:15,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:15,267 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 151 flow. Second operand 3 states and 719 transitions. [2022-12-13 20:50:15,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 229 flow [2022-12-13 20:50:15,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 20:50:15,357 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 120 flow [2022-12-13 20:50:15,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2022-12-13 20:50:15,361 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -15 predicate places. [2022-12-13 20:50:15,362 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 120 flow [2022-12-13 20:50:15,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:15,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:50:15,362 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:50:15,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:50:15,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:50:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:50:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash 46265, now seen corresponding path program 1 times [2022-12-13 20:50:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:50:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182045089] [2022-12-13 20:50:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:50:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:50:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:50:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:50:15,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:50:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182045089] [2022-12-13 20:50:15,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182045089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:50:15,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:50:15,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:50:15,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195309367] [2022-12-13 20:50:15,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:50:15,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:50:15,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:50:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:50:15,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:50:15,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2022-12-13 20:50:15,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:15,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:50:15,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2022-12-13 20:50:15,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:50:25,406 INFO L130 PetriNetUnfolder]: 90903/113047 cut-off events. [2022-12-13 20:50:25,406 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:50:25,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226002 conditions, 113047 events. 90903/113047 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9860. Compared 669335 event pairs, 60600 based on Foata normal form. 0/34393 useless extension candidates. Maximal degree in co-relation 225996. Up to 55399 conditions per place. [2022-12-13 20:50:25,978 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 91 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2022-12-13 20:50:25,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 101 transitions, 410 flow [2022-12-13 20:50:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:50:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:50:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 757 transitions. [2022-12-13 20:50:25,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46989447548106766 [2022-12-13 20:50:25,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 757 transitions. [2022-12-13 20:50:25,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 757 transitions. [2022-12-13 20:50:25,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:50:25,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 757 transitions. [2022-12-13 20:50:25,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:25,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:25,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:25,987 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 120 flow. Second operand 3 states and 757 transitions. [2022-12-13 20:50:25,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 101 transitions, 410 flow [2022-12-13 20:50:25,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 101 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:50:25,988 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 151 flow [2022-12-13 20:50:25,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2022-12-13 20:50:25,989 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -12 predicate places. [2022-12-13 20:50:25,989 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 151 flow [2022-12-13 20:50:25,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:25,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:50:25,990 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 20:50:25,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:50:25,990 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:50:25,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:50:25,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1436367, now seen corresponding path program 1 times [2022-12-13 20:50:25,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:50:25,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831884467] [2022-12-13 20:50:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:50:25,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:50:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:50:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:50:26,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:50:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831884467] [2022-12-13 20:50:26,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831884467] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:50:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198269014] [2022-12-13 20:50:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:50:26,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:50:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:50:26,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:50:26,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:50:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:50:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:50:26,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:50:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:50:26,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:50:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:50:26,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198269014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:50:26,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:50:26,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 20:50:26,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452164457] [2022-12-13 20:50:26,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:50:26,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:50:26,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:50:26,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:50:26,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:50:26,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2022-12-13 20:50:26,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 151 flow. Second operand has 7 states, 7 states have (on average 221.14285714285714) internal successors, (1548), 7 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:26,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:50:26,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2022-12-13 20:50:26,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:50:49,021 INFO L130 PetriNetUnfolder]: 227256/282613 cut-off events. [2022-12-13 20:50:49,021 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:50:49,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565016 conditions, 282613 events. 227256/282613 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18180. Compared 1788868 event pairs, 151500 based on Foata normal form. 0/86759 useless extension candidates. Maximal degree in co-relation 565007. Up to 55399 conditions per place. [2022-12-13 20:50:50,341 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 220 selfloop transitions, 13 changer transitions 0/239 dead transitions. [2022-12-13 20:50:50,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 239 transitions, 1035 flow [2022-12-13 20:50:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:50:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:50:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1559 transitions. [2022-12-13 20:50:50,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48386095592799505 [2022-12-13 20:50:50,345 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1559 transitions. [2022-12-13 20:50:50,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1559 transitions. [2022-12-13 20:50:50,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:50:50,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1559 transitions. [2022-12-13 20:50:50,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 259.8333333333333) internal successors, (1559), 6 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:50,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:50,353 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:50,353 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 151 flow. Second operand 6 states and 1559 transitions. [2022-12-13 20:50:50,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 239 transitions, 1035 flow [2022-12-13 20:50:50,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 239 transitions, 1021 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:50:50,356 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 236 flow [2022-12-13 20:50:50,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2022-12-13 20:50:50,357 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2022-12-13 20:50:50,357 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 236 flow [2022-12-13 20:50:50,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 221.14285714285714) internal successors, (1548), 7 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:50,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:50:50,358 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 20:50:50,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:50:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:50:50,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:50:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:50:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash -156726727, now seen corresponding path program 2 times [2022-12-13 20:50:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:50:50,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098706806] [2022-12-13 20:50:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:50:50,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:50:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:50:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:50:50,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:50:50,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098706806] [2022-12-13 20:50:50,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098706806] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:50:50,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914366448] [2022-12-13 20:50:50,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:50:50,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:50:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:50:50,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:50:50,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:50:50,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 20:50:50,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:50:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 20:50:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:50:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:50:50,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:50:50,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914366448] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:50:50,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:50:50,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 20:50:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601756596] [2022-12-13 20:50:50,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:50:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:50:50,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:50:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:50:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:50:50,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 537 [2022-12-13 20:50:50,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:50:50,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:50:50,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 537 [2022-12-13 20:50:50,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:51:14,068 INFO L130 PetriNetUnfolder]: 227256/282612 cut-off events. [2022-12-13 20:51:14,068 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 20:51:14,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565036 conditions, 282612 events. 227256/282612 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19696. Compared 1798701 event pairs, 151500 based on Foata normal form. 1/84711 useless extension candidates. Maximal degree in co-relation 565024. Up to 276972 conditions per place. [2022-12-13 20:51:15,320 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 54 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2022-12-13 20:51:15,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 346 flow [2022-12-13 20:51:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:51:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:51:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2022-12-13 20:51:15,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44382371198013654 [2022-12-13 20:51:15,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2022-12-13 20:51:15,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2022-12-13 20:51:15,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:51:15,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2022-12-13 20:51:15,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:15,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:15,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:15,328 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 236 flow. Second operand 3 states and 715 transitions. [2022-12-13 20:51:15,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 346 flow [2022-12-13 20:51:15,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 327 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 20:51:15,330 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 219 flow [2022-12-13 20:51:15,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2022-12-13 20:51:15,332 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2022-12-13 20:51:15,332 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 219 flow [2022-12-13 20:51:15,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:15,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:51:15,333 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:51:15,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:51:15,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:51:15,534 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:51:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:51:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash -147352325, now seen corresponding path program 1 times [2022-12-13 20:51:15,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:51:15,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224498580] [2022-12-13 20:51:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:51:15,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:51:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:51:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:51:15,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:51:15,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224498580] [2022-12-13 20:51:15,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224498580] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:51:15,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:51:15,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:51:15,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526577711] [2022-12-13 20:51:15,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:51:15,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:51:15,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:51:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:51:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:51:15,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 537 [2022-12-13 20:51:15,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:15,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:51:15,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 537 [2022-12-13 20:51:15,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:51:46,657 INFO L130 PetriNetUnfolder]: 296791/377172 cut-off events. [2022-12-13 20:51:46,657 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 20:51:47,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758872 conditions, 377172 events. 296791/377172 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 25971. Compared 2687230 event pairs, 90805 based on Foata normal form. 0/122277 useless extension candidates. Maximal degree in co-relation 758859. Up to 225566 conditions per place. [2022-12-13 20:51:48,555 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 97 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2022-12-13 20:51:48,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 502 flow [2022-12-13 20:51:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:51:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:51:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2022-12-13 20:51:48,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47423960273122284 [2022-12-13 20:51:48,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2022-12-13 20:51:48,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2022-12-13 20:51:48,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:51:48,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2022-12-13 20:51:48,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:48,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:48,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:48,562 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 219 flow. Second operand 3 states and 764 transitions. [2022-12-13 20:51:48,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 502 flow [2022-12-13 20:51:48,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:51:48,564 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 221 flow [2022-12-13 20:51:48,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2022-12-13 20:51:48,565 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2022-12-13 20:51:48,565 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 221 flow [2022-12-13 20:51:48,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:48,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:51:48,566 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:51:48,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 20:51:48,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:51:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:51:48,566 INFO L85 PathProgramCache]: Analyzing trace with hash -147352472, now seen corresponding path program 1 times [2022-12-13 20:51:48,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:51:48,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145640170] [2022-12-13 20:51:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:51:48,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:51:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:51:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:51:48,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:51:48,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145640170] [2022-12-13 20:51:48,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145640170] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:51:48,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:51:48,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:51:48,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320390746] [2022-12-13 20:51:48,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:51:48,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:51:48,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:51:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:51:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:51:48,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2022-12-13 20:51:48,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:51:48,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:51:48,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2022-12-13 20:51:48,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:25,484 INFO L130 PetriNetUnfolder]: 314091/402268 cut-off events. [2022-12-13 20:52:25,485 INFO L131 PetriNetUnfolder]: For 19636/19636 co-relation queries the response was YES. [2022-12-13 20:52:26,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837174 conditions, 402268 events. 314091/402268 cut-off events. For 19636/19636 co-relation queries the response was YES. Maximal size of possible extension queue 27926. Compared 2904950 event pairs, 239665 based on Foata normal form. 0/145382 useless extension candidates. Maximal degree in co-relation 837160. Up to 373946 conditions per place. [2022-12-13 20:52:27,520 INFO L137 encePairwiseOnDemand]: 526/537 looper letters, 96 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2022-12-13 20:52:27,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 530 flow [2022-12-13 20:52:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:52:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:52:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 940 transitions. [2022-12-13 20:52:27,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4376163873370577 [2022-12-13 20:52:27,526 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 940 transitions. [2022-12-13 20:52:27,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 940 transitions. [2022-12-13 20:52:27,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:52:27,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 940 transitions. [2022-12-13 20:52:27,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,537 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 221 flow. Second operand 4 states and 940 transitions. [2022-12-13 20:52:27,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 530 flow [2022-12-13 20:52:27,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 105 transitions, 528 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:52:27,549 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 242 flow [2022-12-13 20:52:27,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2022-12-13 20:52:27,551 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2022-12-13 20:52:27,551 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 242 flow [2022-12-13 20:52:27,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:27,552 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:52:27,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:52:27,552 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:52:27,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:27,552 INFO L85 PathProgramCache]: Analyzing trace with hash -554184834, now seen corresponding path program 1 times [2022-12-13 20:52:27,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:52:27,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871586673] [2022-12-13 20:52:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:27,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:52:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:27,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:52:27,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871586673] [2022-12-13 20:52:27,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871586673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:52:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352933185] [2022-12-13 20:52:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:27,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:52:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:52:27,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:52:27,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:52:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:27,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:52:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:52:27,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:52:27,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352933185] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:52:27,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:52:27,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 20:52:27,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477731608] [2022-12-13 20:52:27,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:52:27,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:52:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:52:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:52:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:52:27,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2022-12-13 20:52:27,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:27,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2022-12-13 20:52:27,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:54,314 INFO L130 PetriNetUnfolder]: 230731/296308 cut-off events. [2022-12-13 20:52:54,314 INFO L131 PetriNetUnfolder]: For 35571/35571 co-relation queries the response was YES. [2022-12-13 20:52:54,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667843 conditions, 296308 events. 230731/296308 cut-off events. For 35571/35571 co-relation queries the response was YES. Maximal size of possible extension queue 19116. Compared 2094556 event pairs, 174825 based on Foata normal form. 0/131992 useless extension candidates. Maximal degree in co-relation 667827. Up to 290553 conditions per place. [2022-12-13 20:52:55,992 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 58 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2022-12-13 20:52:55,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 352 flow [2022-12-13 20:52:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:52:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:52:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2022-12-13 20:52:55,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44692737430167595 [2022-12-13 20:52:55,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2022-12-13 20:52:55,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2022-12-13 20:52:55,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:52:55,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2022-12-13 20:52:55,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:55,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:55,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:55,999 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 242 flow. Second operand 3 states and 720 transitions. [2022-12-13 20:52:55,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 352 flow [2022-12-13 20:52:56,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 346 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 20:52:56,006 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 230 flow [2022-12-13 20:52:56,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-12-13 20:52:56,006 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-12-13 20:52:56,006 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 230 flow [2022-12-13 20:52:56,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:56,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:56,007 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 20:52:56,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:52:56,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 20:52:56,208 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:52:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash -289673517, now seen corresponding path program 1 times [2022-12-13 20:52:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:52:56,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001532808] [2022-12-13 20:52:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:56,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:52:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:56,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:52:56,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001532808] [2022-12-13 20:52:56,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001532808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:52:56,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257569758] [2022-12-13 20:52:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:56,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:52:56,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:52:56,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:52:56,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:52:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 20:52:56,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:56,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:52:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:56,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257569758] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:52:56,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:52:56,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 20:52:56,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052820778] [2022-12-13 20:52:56,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:52:56,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:52:56,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:52:56,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:52:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:52:56,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2022-12-13 20:52:56,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 221.15384615384616) internal successors, (2875), 13 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:56,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:56,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2022-12-13 20:52:56,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:53:54,894 INFO L130 PetriNetUnfolder]: 507607/651874 cut-off events. [2022-12-13 20:53:54,895 INFO L131 PetriNetUnfolder]: For 78287/78287 co-relation queries the response was YES. [2022-12-13 20:53:56,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469213 conditions, 651874 events. 507607/651874 cut-off events. For 78287/78287 co-relation queries the response was YES. Maximal size of possible extension queue 27847. Compared 4773861 event pairs, 384615 based on Foata normal form. 12/296056 useless extension candidates. Maximal degree in co-relation 1469196. Up to 114258 conditions per place. [2022-12-13 20:53:58,610 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 466 selfloop transitions, 31 changer transitions 0/503 dead transitions. [2022-12-13 20:53:58,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 503 transitions, 2446 flow [2022-12-13 20:53:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:53:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 20:53:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3132 transitions. [2022-12-13 20:53:58,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4860335195530726 [2022-12-13 20:53:58,618 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3132 transitions. [2022-12-13 20:53:58,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3132 transitions. [2022-12-13 20:53:58,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:53:58,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3132 transitions. [2022-12-13 20:53:58,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 261.0) internal successors, (3132), 12 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:58,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:58,631 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:58,631 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 230 flow. Second operand 12 states and 3132 transitions. [2022-12-13 20:53:58,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 503 transitions, 2446 flow [2022-12-13 20:53:58,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 503 transitions, 2445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:53:58,645 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 439 flow [2022-12-13 20:53:58,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=439, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2022-12-13 20:53:58,646 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 13 predicate places. [2022-12-13 20:53:58,646 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 439 flow [2022-12-13 20:53:58,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 221.15384615384616) internal successors, (2875), 13 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:58,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:53:58,648 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:58,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 20:53:58,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5431ff6-d96d-4670-824f-ef8df8993aec/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:53:58,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:53:58,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:58,851 INFO L85 PathProgramCache]: Analyzing trace with hash 136642215, now seen corresponding path program 1 times [2022-12-13 20:53:58,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:58,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040257812] [2022-12-13 20:53:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:58,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:58,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:58,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040257812] [2022-12-13 20:53:58,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040257812] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:58,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:58,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:53:58,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130761986] [2022-12-13 20:53:58,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:58,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:53:58,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:58,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:53:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:58,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2022-12-13 20:53:58,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 439 flow. Second operand has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:58,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:53:58,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2022-12-13 20:53:58,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:52,047 INFO L130 PetriNetUnfolder]: 446843/575479 cut-off events. [2022-12-13 20:54:52,048 INFO L131 PetriNetUnfolder]: For 69693/69693 co-relation queries the response was YES. [2022-12-13 20:54:53,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298359 conditions, 575479 events. 446843/575479 cut-off events. For 69693/69693 co-relation queries the response was YES. Maximal size of possible extension queue 25071. Compared 4236302 event pairs, 340813 based on Foata normal form. 0/263627 useless extension candidates. Maximal degree in co-relation 1298335. Up to 564226 conditions per place. [2022-12-13 20:54:55,686 INFO L137 encePairwiseOnDemand]: 535/537 looper letters, 75 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2022-12-13 20:54:55,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 589 flow [2022-12-13 20:54:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:54:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:54:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 718 transitions. [2022-12-13 20:54:55,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4456859093730602 [2022-12-13 20:54:55,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 718 transitions. [2022-12-13 20:54:55,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 718 transitions. [2022-12-13 20:54:55,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:55,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 718 transitions. [2022-12-13 20:54:55,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:55,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:55,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:55,694 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 439 flow. Second operand 3 states and 718 transitions. [2022-12-13 20:54:55,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 589 flow [2022-12-13 20:54:55,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 499 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-12-13 20:54:55,706 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 349 flow [2022-12-13 20:54:55,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2022-12-13 20:54:55,707 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-12-13 20:54:55,707 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 349 flow [2022-12-13 20:54:55,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:55,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:55,708 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 20:54:55,708 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:54:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash 136642211, now seen corresponding path program 1 times [2022-12-13 20:54:55,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:55,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908290053] [2022-12-13 20:54:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:55,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:55,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908290053] [2022-12-13 20:54:55,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908290053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:54:55,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:54:55,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:54:55,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516777711] [2022-12-13 20:54:55,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:54:55,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:54:55,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:55,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:54:55,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:54:55,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 537 [2022-12-13 20:54:55,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:55,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:55,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 537 [2022-12-13 20:54:55,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:55:45,441 INFO L130 PetriNetUnfolder]: 408282/526350 cut-off events. [2022-12-13 20:55:45,441 INFO L131 PetriNetUnfolder]: For 63871/63871 co-relation queries the response was YES. [2022-12-13 20:55:47,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187926 conditions, 526350 events. 408282/526350 cut-off events. For 63871/63871 co-relation queries the response was YES. Maximal size of possible extension queue 24610. Compared 3868887 event pairs, 311794 based on Foata normal form. 0/247202 useless extension candidates. Maximal degree in co-relation 1187902. Up to 512927 conditions per place. [2022-12-13 20:55:48,950 INFO L137 encePairwiseOnDemand]: 523/537 looper letters, 90 selfloop transitions, 13 changer transitions 2/111 dead transitions. [2022-12-13 20:55:48,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 111 transitions, 645 flow [2022-12-13 20:55:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:55:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:55:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 949 transitions. [2022-12-13 20:55:48,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44180633147113596 [2022-12-13 20:55:48,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 949 transitions. [2022-12-13 20:55:48,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 949 transitions. [2022-12-13 20:55:48,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:55:48,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 949 transitions. [2022-12-13 20:55:48,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.25) internal successors, (949), 4 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:48,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:48,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:48,957 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 349 flow. Second operand 4 states and 949 transitions. [2022-12-13 20:55:48,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 111 transitions, 645 flow [2022-12-13 20:55:48,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 644 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:55:48,970 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 414 flow [2022-12-13 20:55:48,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=414, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2022-12-13 20:55:48,971 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 13 predicate places. [2022-12-13 20:55:48,971 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 414 flow [2022-12-13 20:55:48,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:48,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:55:48,972 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:55:48,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 20:55:48,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:55:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:55:48,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1323252342, now seen corresponding path program 1 times [2022-12-13 20:55:48,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:55:48,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377963845] [2022-12-13 20:55:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:55:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:55:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:55:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:55:49,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:55:49,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377963845] [2022-12-13 20:55:49,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377963845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:55:49,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:55:49,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:55:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972239701] [2022-12-13 20:55:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:55:49,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:55:49,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:55:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:55:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:55:49,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 537 [2022-12-13 20:55:49,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 414 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:49,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:55:49,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 537 [2022-12-13 20:55:49,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:56:58,208 INFO L130 PetriNetUnfolder]: 508102/681600 cut-off events. [2022-12-13 20:56:58,208 INFO L131 PetriNetUnfolder]: For 127864/127864 co-relation queries the response was YES. [2022-12-13 20:57:00,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797447 conditions, 681600 events. 508102/681600 cut-off events. For 127864/127864 co-relation queries the response was YES. Maximal size of possible extension queue 35447. Compared 5834872 event pairs, 192424 based on Foata normal form. 0/395993 useless extension candidates. Maximal degree in co-relation 1797421. Up to 403961 conditions per place. [2022-12-13 20:57:02,848 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 110 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2022-12-13 20:57:02,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 752 flow [2022-12-13 20:57:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:57:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:57:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 756 transitions. [2022-12-13 20:57:02,851 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4692737430167598 [2022-12-13 20:57:02,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 756 transitions. [2022-12-13 20:57:02,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 756 transitions. [2022-12-13 20:57:02,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:57:02,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 756 transitions. [2022-12-13 20:57:02,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:02,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:02,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:02,856 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 414 flow. Second operand 3 states and 756 transitions. [2022-12-13 20:57:02,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 752 flow [2022-12-13 20:57:03,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 725 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 20:57:03,091 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 401 flow [2022-12-13 20:57:03,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2022-12-13 20:57:03,092 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2022-12-13 20:57:03,092 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 401 flow [2022-12-13 20:57:03,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:03,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:57:03,092 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:57:03,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 20:57:03,093 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-12-13 20:57:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:57:03,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1323252248, now seen corresponding path program 1 times [2022-12-13 20:57:03,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:57:03,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045438264] [2022-12-13 20:57:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:57:03,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:57:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:57:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:57:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:57:03,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045438264] [2022-12-13 20:57:03,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045438264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:57:03,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:57:03,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:57:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745979290] [2022-12-13 20:57:03,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:57:03,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:57:03,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:57:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:57:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:57:03,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2022-12-13 20:57:03,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:03,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:57:03,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2022-12-13 20:57:03,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand