./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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-38b53e6 [2022-11-25 15:37:54,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:37:54,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:37:54,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:37:54,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:37:54,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:37:54,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:37:54,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:37:54,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:37:54,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:37:54,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:37:54,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:37:54,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:37:54,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:37:54,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:37:54,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:37:54,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:37:54,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:37:54,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:37:54,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:37:54,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:37:54,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:37:54,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:37:54,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:37:54,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:37:54,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:37:54,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:37:54,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:37:54,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:37:54,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:37:54,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:37:54,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:37:54,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:37:54,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:37:54,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:37:54,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:37:54,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:37:54,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:37:54,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:37:54,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:37:54,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:37:54,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 15:37:54,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:37:54,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:37:54,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:37:54,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:37:54,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:37:54,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:37:54,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:37:54,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:37:54,918 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:37:54,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:37:54,920 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:37:54,920 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:37:54,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:37:54,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:37:54,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:37:54,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:37:54,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:37:54,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:37:54,921 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 15:37:54,922 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:37:54,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:37:54,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:37:54,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:37:54,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:37:54,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:37:54,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:37:54,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:37:54,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:37:54,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:37:54,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:37:54,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:37:54,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:37:54,926 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:37:54,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:37:54,926 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:37:54,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:37:54,926 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_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-25 15:37:55,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:37:55,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:37:55,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:37:55,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:37:55,397 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:37:55,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-25 15:37:59,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:37:59,459 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:37:59,460 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-25 15:37:59,469 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/data/6ec00f7d5/8281366dd0284b0f9856dfe953ba905c/FLAG96ef70e8a [2022-11-25 15:37:59,487 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/data/6ec00f7d5/8281366dd0284b0f9856dfe953ba905c [2022-11-25 15:37:59,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:37:59,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:37:59,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:37:59,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:37:59,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:37:59,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e2162e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59, skipping insertion in model container [2022-11-25 15:37:59,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:37:59,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:37:59,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,792 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,798 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,799 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,804 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,805 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,806 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,821 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_61eec168-75ab-4b95-a1a5-a3a8881502d3/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-25 15:37:59,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:37:59,840 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:37:59,858 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,859 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,862 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,865 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,865 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,869 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:59,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:59,875 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_61eec168-75ab-4b95-a1a5-a3a8881502d3/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-25 15:37:59,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:37:59,904 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:37:59,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59 WrapperNode [2022-11-25 15:37:59,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:37:59,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:37:59,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:37:59,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:37:59,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,988 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 161 [2022-11-25 15:38:00,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:38:00,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:38:00,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:38:00,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:38:00,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:38:00,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:38:00,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:38:00,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:38:00,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:38:00,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:38:00,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:00,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:38:00,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:38:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:38:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:38:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:38:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:38:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:38:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:38:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:38:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:38:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:38:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:38:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:38:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:38:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:38:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:38:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:38:00,146 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:38:00,274 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:38:00,277 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:38:00,707 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:38:00,915 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:38:00,916 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:38:00,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:38:00 BoogieIcfgContainer [2022-11-25 15:38:00,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:38:00,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:38:00,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:38:00,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:38:00,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:37:59" (1/3) ... [2022-11-25 15:38:00,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9cd7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:38:00, skipping insertion in model container [2022-11-25 15:38:00,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (2/3) ... [2022-11-25 15:38:00,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9cd7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:38:00, skipping insertion in model container [2022-11-25 15:38:00,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:38:00" (3/3) ... [2022-11-25 15:38:00,945 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-11-25 15:38:00,956 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:38:00,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:38:00,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 15:38:00,974 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:38:01,124 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:38:01,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 157 transitions, 330 flow [2022-11-25 15:38:01,333 INFO L130 PetriNetUnfolder]: 11/155 cut-off events. [2022-11-25 15:38:01,333 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:38:01,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 11/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 182 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-11-25 15:38:01,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 157 transitions, 330 flow [2022-11-25 15:38:01,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 136 transitions, 281 flow [2022-11-25 15:38:01,361 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:38:01,396 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 136 transitions, 281 flow [2022-11-25 15:38:01,416 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 136 transitions, 281 flow [2022-11-25 15:38:01,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 136 transitions, 281 flow [2022-11-25 15:38:01,460 INFO L130 PetriNetUnfolder]: 10/136 cut-off events. [2022-11-25 15:38:01,460 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:38:01,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 136 events. 10/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 174 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-11-25 15:38:01,464 INFO L119 LiptonReduction]: Number of co-enabled transitions 1980 [2022-11-25 15:38:10,377 INFO L134 LiptonReduction]: Checked pairs total: 2219 [2022-11-25 15:38:10,377 INFO L136 LiptonReduction]: Total number of compositions: 154 [2022-11-25 15:38:10,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:38:10,429 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;@7cd367ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:38:10,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-25 15:38:10,438 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 15:38:10,439 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:38:10,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:10,440 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:38:10,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:10,449 INFO L85 PathProgramCache]: Analyzing trace with hash 21788, now seen corresponding path program 1 times [2022-11-25 15:38:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:10,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249782713] [2022-11-25 15:38:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:10,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249782713] [2022-11-25 15:38:10,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249782713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:10,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:10,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:38:10,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431052099] [2022-11-25 15:38:10,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:10,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:10,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:10,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:38:11,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 311 [2022-11-25 15:38:11,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:11,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:11,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 311 [2022-11-25 15:38:11,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:11,292 INFO L130 PetriNetUnfolder]: 383/577 cut-off events. [2022-11-25 15:38:11,293 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 15:38:11,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 577 events. 383/577 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 2459 event pairs, 178 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 523. Up to 284 conditions per place. [2022-11-25 15:38:11,300 INFO L137 encePairwiseOnDemand]: 304/311 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-11-25 15:38:11,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2022-11-25 15:38:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2022-11-25 15:38:11,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4780278670953912 [2022-11-25 15:38:11,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2022-11-25 15:38:11,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2022-11-25 15:38:11,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:11,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2022-11-25 15:38:11,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:11,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:11,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:11,367 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 61 flow. Second operand 3 states and 446 transitions. [2022-11-25 15:38:11,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2022-11-25 15:38:11,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 15:38:11,375 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 64 flow [2022-11-25 15:38:11,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2022-11-25 15:38:11,382 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-11-25 15:38:11,383 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 64 flow [2022-11-25 15:38:11,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:11,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:11,384 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:38:11,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:38:11,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash 676682, now seen corresponding path program 1 times [2022-11-25 15:38:11,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:11,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184717394] [2022-11-25 15:38:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:11,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:11,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:11,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184717394] [2022-11-25 15:38:11,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184717394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:11,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091807750] [2022-11-25 15:38:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:11,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:11,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:11,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:11,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:38:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:11,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:38:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:11,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:11,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091807750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:11,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:11,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 15:38:11,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684651061] [2022-11-25 15:38:11,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:11,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:38:11,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:38:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:38:11,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 311 [2022-11-25 15:38:11,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 134.14285714285714) internal successors, (939), 7 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:11,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:11,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 311 [2022-11-25 15:38:11,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:12,513 INFO L130 PetriNetUnfolder]: 959/1441 cut-off events. [2022-11-25 15:38:12,514 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-25 15:38:12,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 1441 events. 959/1441 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 7399 event pairs, 445 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 2347. Up to 283 conditions per place. [2022-11-25 15:38:12,526 INFO L137 encePairwiseOnDemand]: 307/311 looper letters, 87 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2022-11-25 15:38:12,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 98 transitions, 432 flow [2022-11-25 15:38:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:38:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:38:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1030 transitions. [2022-11-25 15:38:12,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4731281580156178 [2022-11-25 15:38:12,533 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1030 transitions. [2022-11-25 15:38:12,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1030 transitions. [2022-11-25 15:38:12,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:12,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1030 transitions. [2022-11-25 15:38:12,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.14285714285714) internal successors, (1030), 7 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,547 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,547 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 64 flow. Second operand 7 states and 1030 transitions. [2022-11-25 15:38:12,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 98 transitions, 432 flow [2022-11-25 15:38:12,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 98 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:12,551 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 121 flow [2022-11-25 15:38:12,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2022-11-25 15:38:12,553 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-11-25 15:38:12,553 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 121 flow [2022-11-25 15:38:12,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.14285714285714) internal successors, (939), 7 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:12,555 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-25 15:38:12,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 15:38:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:12,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash 20977788, now seen corresponding path program 1 times [2022-11-25 15:38:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:12,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628832013] [2022-11-25 15:38:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:12,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:12,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628832013] [2022-11-25 15:38:12,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628832013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:12,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:12,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:38:12,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30465558] [2022-11-25 15:38:12,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:12,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:12,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:38:12,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 311 [2022-11-25 15:38:12,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:12,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 311 [2022-11-25 15:38:12,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:13,185 INFO L130 PetriNetUnfolder]: 956/1437 cut-off events. [2022-11-25 15:38:13,186 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 15:38:13,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2940 conditions, 1437 events. 956/1437 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 7419 event pairs, 445 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 1754. Up to 1402 conditions per place. [2022-11-25 15:38:13,200 INFO L137 encePairwiseOnDemand]: 309/311 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-11-25 15:38:13,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 26 transitions, 142 flow [2022-11-25 15:38:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2022-11-25 15:38:13,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45016077170418006 [2022-11-25 15:38:13,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2022-11-25 15:38:13,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2022-11-25 15:38:13,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:13,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2022-11-25 15:38:13,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,217 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 121 flow. Second operand 3 states and 420 transitions. [2022-11-25 15:38:13,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 26 transitions, 142 flow [2022-11-25 15:38:13,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 134 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:13,222 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 88 flow [2022-11-25 15:38:13,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2022-11-25 15:38:13,225 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2022-11-25 15:38:13,226 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 88 flow [2022-11-25 15:38:13,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:13,227 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:38:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:38:13,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 650111662, now seen corresponding path program 1 times [2022-11-25 15:38:13,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:13,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128084184] [2022-11-25 15:38:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:13,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128084184] [2022-11-25 15:38:13,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128084184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:13,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:13,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:38:13,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202354021] [2022-11-25 15:38:13,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:13,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:13,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 311 [2022-11-25 15:38:13,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:13,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 311 [2022-11-25 15:38:13,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:13,950 INFO L130 PetriNetUnfolder]: 786/1432 cut-off events. [2022-11-25 15:38:13,951 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-25 15:38:13,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2918 conditions, 1432 events. 786/1432 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8528 event pairs, 285 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 2906. Up to 791 conditions per place. [2022-11-25 15:38:13,960 INFO L137 encePairwiseOnDemand]: 304/311 looper letters, 42 selfloop transitions, 4 changer transitions 3/50 dead transitions. [2022-11-25 15:38:13,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 238 flow [2022-11-25 15:38:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 693 transitions. [2022-11-25 15:38:13,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4456591639871383 [2022-11-25 15:38:13,964 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 693 transitions. [2022-11-25 15:38:13,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 693 transitions. [2022-11-25 15:38:13,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:13,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 693 transitions. [2022-11-25 15:38:13,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,973 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,974 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 88 flow. Second operand 5 states and 693 transitions. [2022-11-25 15:38:13,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 238 flow [2022-11-25 15:38:13,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:13,977 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 129 flow [2022-11-25 15:38:13,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2022-11-25 15:38:13,978 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2022-11-25 15:38:13,978 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 129 flow [2022-11-25 15:38:13,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:13,979 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 15:38:13,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:38:13,980 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1315142673, now seen corresponding path program 2 times [2022-11-25 15:38:13,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:13,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952751979] [2022-11-25 15:38:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952751979] [2022-11-25 15:38:14,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952751979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:14,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656673073] [2022-11-25 15:38:14,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:38:14,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:14,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:14,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:14,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:38:14,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:38:14,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:14,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:38:14,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:38:14,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:14,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656673073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:14,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:38:14,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 15:38:14,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262204719] [2022-11-25 15:38:14,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:14,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:14,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:38:14,256 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 311 [2022-11-25 15:38:14,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:14,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 311 [2022-11-25 15:38:14,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:14,576 INFO L130 PetriNetUnfolder]: 851/1456 cut-off events. [2022-11-25 15:38:14,576 INFO L131 PetriNetUnfolder]: For 678/748 co-relation queries the response was YES. [2022-11-25 15:38:14,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1456 events. 851/1456 cut-off events. For 678/748 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 8881 event pairs, 525 based on Foata normal form. 56/972 useless extension candidates. Maximal degree in co-relation 3850. Up to 1436 conditions per place. [2022-11-25 15:38:14,589 INFO L137 encePairwiseOnDemand]: 309/311 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-11-25 15:38:14,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 169 flow [2022-11-25 15:38:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2022-11-25 15:38:14,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45230439442658094 [2022-11-25 15:38:14,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2022-11-25 15:38:14,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2022-11-25 15:38:14,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:14,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2022-11-25 15:38:14,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,599 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 129 flow. Second operand 3 states and 422 transitions. [2022-11-25 15:38:14,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 169 flow [2022-11-25 15:38:14,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 157 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 15:38:14,605 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 109 flow [2022-11-25 15:38:14,608 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2022-11-25 15:38:14,611 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2022-11-25 15:38:14,611 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 109 flow [2022-11-25 15:38:14,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:14,612 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:14,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:14,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:14,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1991862829, now seen corresponding path program 1 times [2022-11-25 15:38:14,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:14,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359499461] [2022-11-25 15:38:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:14,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359499461] [2022-11-25 15:38:14,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359499461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:14,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:14,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:38:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268795089] [2022-11-25 15:38:14,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:14,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:14,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:15,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 311 [2022-11-25 15:38:15,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:15,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 311 [2022-11-25 15:38:15,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:15,315 INFO L130 PetriNetUnfolder]: 690/1195 cut-off events. [2022-11-25 15:38:15,315 INFO L131 PetriNetUnfolder]: For 575/638 co-relation queries the response was YES. [2022-11-25 15:38:15,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 1195 events. 690/1195 cut-off events. For 575/638 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 7116 event pairs, 429 based on Foata normal form. 59/822 useless extension candidates. Maximal degree in co-relation 3133. Up to 1150 conditions per place. [2022-11-25 15:38:15,326 INFO L137 encePairwiseOnDemand]: 305/311 looper letters, 23 selfloop transitions, 2 changer transitions 9/37 dead transitions. [2022-11-25 15:38:15,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 199 flow [2022-11-25 15:38:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2022-11-25 15:38:15,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4437299035369775 [2022-11-25 15:38:15,331 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2022-11-25 15:38:15,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2022-11-25 15:38:15,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:15,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2022-11-25 15:38:15,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,337 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,338 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 109 flow. Second operand 4 states and 552 transitions. [2022-11-25 15:38:15,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 199 flow [2022-11-25 15:38:15,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:15,342 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 124 flow [2022-11-25 15:38:15,342 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2022-11-25 15:38:15,346 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2022-11-25 15:38:15,346 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 124 flow [2022-11-25 15:38:15,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:15,347 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:15,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:38:15,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1320090376, now seen corresponding path program 1 times [2022-11-25 15:38:15,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:15,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763768430] [2022-11-25 15:38:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:15,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:15,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763768430] [2022-11-25 15:38:15,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763768430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:15,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748661106] [2022-11-25 15:38:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:15,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:15,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:15,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:15,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:38:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:38:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:15,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:15,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748661106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:15,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:38:15,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-25 15:38:15,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270104438] [2022-11-25 15:38:15,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:15,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:15,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:38:15,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 311 [2022-11-25 15:38:15,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:15,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 311 [2022-11-25 15:38:15,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:15,778 INFO L130 PetriNetUnfolder]: 309/554 cut-off events. [2022-11-25 15:38:15,778 INFO L131 PetriNetUnfolder]: For 568/600 co-relation queries the response was YES. [2022-11-25 15:38:15,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 554 events. 309/554 cut-off events. For 568/600 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2776 event pairs, 164 based on Foata normal form. 128/606 useless extension candidates. Maximal degree in co-relation 1557. Up to 538 conditions per place. [2022-11-25 15:38:15,782 INFO L137 encePairwiseOnDemand]: 307/311 looper letters, 17 selfloop transitions, 1 changer transitions 5/25 dead transitions. [2022-11-25 15:38:15,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 25 transitions, 154 flow [2022-11-25 15:38:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2022-11-25 15:38:15,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4512325830653805 [2022-11-25 15:38:15,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2022-11-25 15:38:15,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2022-11-25 15:38:15,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:15,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2022-11-25 15:38:15,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,792 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 124 flow. Second operand 3 states and 421 transitions. [2022-11-25 15:38:15,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 25 transitions, 154 flow [2022-11-25 15:38:15,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 144 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 15:38:15,795 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 83 flow [2022-11-25 15:38:15,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2022-11-25 15:38:15,796 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-11-25 15:38:15,796 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 83 flow [2022-11-25 15:38:15,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:15,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:15,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:16,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:38:16,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1591480790, now seen corresponding path program 1 times [2022-11-25 15:38:16,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:16,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739338440] [2022-11-25 15:38:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:16,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:16,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:16,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739338440] [2022-11-25 15:38:16,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739338440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022560295] [2022-11-25 15:38:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:16,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:16,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:16,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:38:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 15:38:16,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:17,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:17,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022560295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:17,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:38:17,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-11-25 15:38:17,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019043894] [2022-11-25 15:38:17,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:17,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:38:17,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:17,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:38:17,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:38:17,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 311 [2022-11-25 15:38:17,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 83 flow. Second operand has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:17,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 311 [2022-11-25 15:38:17,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:17,659 INFO L130 PetriNetUnfolder]: 273/474 cut-off events. [2022-11-25 15:38:17,660 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-25 15:38:17,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 474 events. 273/474 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1923 event pairs, 48 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 1391. Up to 273 conditions per place. [2022-11-25 15:38:17,664 INFO L137 encePairwiseOnDemand]: 303/311 looper letters, 27 selfloop transitions, 12 changer transitions 1/40 dead transitions. [2022-11-25 15:38:17,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 237 flow [2022-11-25 15:38:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:38:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:38:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 871 transitions. [2022-11-25 15:38:17,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4000918695452457 [2022-11-25 15:38:17,669 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 871 transitions. [2022-11-25 15:38:17,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 871 transitions. [2022-11-25 15:38:17,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:17,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 871 transitions. [2022-11-25 15:38:17,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.42857142857143) internal successors, (871), 7 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) [2022-11-25 15:38:17,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,678 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,679 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 83 flow. Second operand 7 states and 871 transitions. [2022-11-25 15:38:17,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 237 flow [2022-11-25 15:38:17,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 222 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:17,683 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 178 flow [2022-11-25 15:38:17,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=178, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2022-11-25 15:38:17,684 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2022-11-25 15:38:17,684 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 178 flow [2022-11-25 15:38:17,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:17,685 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:17,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:17,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:17,893 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2091263836, now seen corresponding path program 1 times [2022-11-25 15:38:17,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:17,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713445403] [2022-11-25 15:38:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:17,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:18,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713445403] [2022-11-25 15:38:18,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713445403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:18,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190747924] [2022-11-25 15:38:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:18,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:18,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:18,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:18,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:38:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:38:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:18,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:19,102 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 15:38:19,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 187 [2022-11-25 15:38:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:19,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190747924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:19,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:19,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 15:38:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251491557] [2022-11-25 15:38:19,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:19,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:38:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:38:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:38:19,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 311 [2022-11-25 15:38:19,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 178 flow. Second operand has 12 states, 12 states have (on average 120.66666666666667) internal successors, (1448), 12 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:19,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 311 [2022-11-25 15:38:19,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:19,864 INFO L130 PetriNetUnfolder]: 228/413 cut-off events. [2022-11-25 15:38:19,865 INFO L131 PetriNetUnfolder]: For 418/432 co-relation queries the response was YES. [2022-11-25 15:38:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 413 events. 228/413 cut-off events. For 418/432 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1764 event pairs, 101 based on Foata normal form. 18/363 useless extension candidates. Maximal degree in co-relation 1473. Up to 329 conditions per place. [2022-11-25 15:38:19,869 INFO L137 encePairwiseOnDemand]: 307/311 looper letters, 39 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2022-11-25 15:38:19,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 346 flow [2022-11-25 15:38:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:38:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:38:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 745 transitions. [2022-11-25 15:38:19,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3992497320471597 [2022-11-25 15:38:19,873 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 745 transitions. [2022-11-25 15:38:19,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 745 transitions. [2022-11-25 15:38:19,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:19,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 745 transitions. [2022-11-25 15:38:19,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.16666666666667) internal successors, (745), 6 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 311.0) internal successors, (2177), 7 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,881 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 311.0) internal successors, (2177), 7 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,881 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 178 flow. Second operand 6 states and 745 transitions. [2022-11-25 15:38:19,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 346 flow [2022-11-25 15:38:19,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 315 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:19,886 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 190 flow [2022-11-25 15:38:19,886 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2022-11-25 15:38:19,887 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2022-11-25 15:38:19,887 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 190 flow [2022-11-25 15:38:19,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.66666666666667) internal successors, (1448), 12 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:19,889 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:19,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:20,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1591480793, now seen corresponding path program 2 times [2022-11-25 15:38:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:20,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440523365] [2022-11-25 15:38:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:20,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:20,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:20,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440523365] [2022-11-25 15:38:20,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440523365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455133359] [2022-11-25 15:38:20,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:38:20,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:20,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:20,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:20,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:38:21,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:38:21,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:21,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:38:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:21,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:21,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455133359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:21,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:38:21,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2022-11-25 15:38:21,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531298404] [2022-11-25 15:38:21,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:21,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:38:21,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:21,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:38:21,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:38:21,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 311 [2022-11-25 15:38:21,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:21,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:21,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 311 [2022-11-25 15:38:21,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:21,727 INFO L130 PetriNetUnfolder]: 207/384 cut-off events. [2022-11-25 15:38:21,730 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2022-11-25 15:38:21,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 384 events. 207/384 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1502 event pairs, 26 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 1295. Up to 223 conditions per place. [2022-11-25 15:38:21,735 INFO L137 encePairwiseOnDemand]: 304/311 looper letters, 28 selfloop transitions, 11 changer transitions 1/40 dead transitions. [2022-11-25 15:38:21,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 279 flow [2022-11-25 15:38:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:38:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:38:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 869 transitions. [2022-11-25 15:38:21,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39917317409278824 [2022-11-25 15:38:21,740 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 869 transitions. [2022-11-25 15:38:21,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 869 transitions. [2022-11-25 15:38:21,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:21,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 869 transitions. [2022-11-25 15:38:21,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.14285714285714) internal successors, (869), 7 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:21,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:21,752 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 311.0) internal successors, (2488), 8 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:21,753 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 190 flow. Second operand 7 states and 869 transitions. [2022-11-25 15:38:21,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 279 flow [2022-11-25 15:38:21,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 269 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 15:38:21,757 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 191 flow [2022-11-25 15:38:21,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=48, PETRI_TRANSITIONS=30} [2022-11-25 15:38:21,759 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2022-11-25 15:38:21,759 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 191 flow [2022-11-25 15:38:21,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:21,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:21,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:21,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 15:38:21,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:21,968 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:21,969 INFO L85 PathProgramCache]: Analyzing trace with hash -404663994, now seen corresponding path program 1 times [2022-11-25 15:38:21,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:21,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380001234] [2022-11-25 15:38:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:21,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:22,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:22,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380001234] [2022-11-25 15:38:22,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380001234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:22,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265372561] [2022-11-25 15:38:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:22,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:22,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:22,209 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:38:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:22,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:38:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:22,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2022-11-25 15:38:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:22,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:22,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2022-11-25 15:38:22,822 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 15:38:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:22,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265372561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:22,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:22,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2022-11-25 15:38:22,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575117597] [2022-11-25 15:38:22,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:22,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:38:22,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:22,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:38:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:38:23,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 311 [2022-11-25 15:38:23,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 191 flow. Second operand has 15 states, 15 states have (on average 122.2) internal successors, (1833), 15 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:23,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 311 [2022-11-25 15:38:23,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:23,860 INFO L130 PetriNetUnfolder]: 307/588 cut-off events. [2022-11-25 15:38:23,860 INFO L131 PetriNetUnfolder]: For 919/919 co-relation queries the response was YES. [2022-11-25 15:38:23,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 588 events. 307/588 cut-off events. For 919/919 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2675 event pairs, 66 based on Foata normal form. 80/642 useless extension candidates. Maximal degree in co-relation 2093. Up to 217 conditions per place. [2022-11-25 15:38:23,866 INFO L137 encePairwiseOnDemand]: 303/311 looper letters, 23 selfloop transitions, 13 changer transitions 27/64 dead transitions. [2022-11-25 15:38:23,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 463 flow [2022-11-25 15:38:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:38:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 15:38:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1625 transitions. [2022-11-25 15:38:23,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40192926045016075 [2022-11-25 15:38:23,873 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1625 transitions. [2022-11-25 15:38:23,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1625 transitions. [2022-11-25 15:38:23,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:23,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1625 transitions. [2022-11-25 15:38:23,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 311.0) internal successors, (4354), 14 states have internal predecessors, (4354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,888 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 311.0) internal successors, (4354), 14 states have internal predecessors, (4354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,888 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 191 flow. Second operand 13 states and 1625 transitions. [2022-11-25 15:38:23,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 463 flow [2022-11-25 15:38:23,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 435 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 15:38:23,894 INFO L231 Difference]: Finished difference. Result has 60 places, 32 transitions, 266 flow [2022-11-25 15:38:23,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=266, PETRI_PLACES=60, PETRI_TRANSITIONS=32} [2022-11-25 15:38:23,895 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2022-11-25 15:38:23,895 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 32 transitions, 266 flow [2022-11-25 15:38:23,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.2) internal successors, (1833), 15 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:23,897 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:23,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 15:38:24,103 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 527390773, now seen corresponding path program 3 times [2022-11-25 15:38:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:24,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622266368] [2022-11-25 15:38:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:24,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:24,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622266368] [2022-11-25 15:38:24,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622266368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:24,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698589065] [2022-11-25 15:38:24,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:38:24,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:25,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:25,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:38:25,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:38:25,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:25,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 15:38:25,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:25,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:38:25,354 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 15:38:25,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 15:38:25,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:25,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-25 15:38:25,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:25,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-25 15:38:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:26,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:28,407 INFO L321 Elim1Store]: treesize reduction 40, result has 62.6 percent of original size [2022-11-25 15:38:28,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 259 treesize of output 221 [2022-11-25 15:38:28,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 352 treesize of output 335 [2022-11-25 15:38:28,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:28,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 315 treesize of output 304 [2022-11-25 15:38:28,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:28,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 277 treesize of output 285 [2022-11-25 15:38:28,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:28,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 278 treesize of output 317 [2022-11-25 15:38:28,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:28,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 703 treesize of output 709 [2022-11-25 15:38:28,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:28,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 631 treesize of output 620 [2022-11-25 15:38:28,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:28,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 593 treesize of output 544 [2022-11-25 15:38:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:45,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698589065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:45,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:45,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-11-25 15:38:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768746330] [2022-11-25 15:38:45,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:45,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 15:38:45,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:45,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 15:38:45,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=389, Unknown=5, NotChecked=0, Total=506 [2022-11-25 15:38:46,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 311 [2022-11-25 15:38:46,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 32 transitions, 266 flow. Second operand has 23 states, 23 states have (on average 85.56521739130434) internal successors, (1968), 23 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:46,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:46,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 311 [2022-11-25 15:38:46,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:51,844 INFO L130 PetriNetUnfolder]: 408/735 cut-off events. [2022-11-25 15:38:51,845 INFO L131 PetriNetUnfolder]: For 3206/3206 co-relation queries the response was YES. [2022-11-25 15:38:51,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 735 events. 408/735 cut-off events. For 3206/3206 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3276 event pairs, 58 based on Foata normal form. 12/707 useless extension candidates. Maximal degree in co-relation 3449. Up to 434 conditions per place. [2022-11-25 15:38:51,856 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 71 selfloop transitions, 56 changer transitions 4/131 dead transitions. [2022-11-25 15:38:51,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 1236 flow [2022-11-25 15:38:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:38:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:38:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2124 transitions. [2022-11-25 15:38:51,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2845659163987138 [2022-11-25 15:38:51,869 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2124 transitions. [2022-11-25 15:38:51,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2124 transitions. [2022-11-25 15:38:51,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:51,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2124 transitions. [2022-11-25 15:38:51,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.5) internal successors, (2124), 24 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:51,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 311.0) internal successors, (7775), 25 states have internal predecessors, (7775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:51,898 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 311.0) internal successors, (7775), 25 states have internal predecessors, (7775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:51,898 INFO L175 Difference]: Start difference. First operand has 60 places, 32 transitions, 266 flow. Second operand 24 states and 2124 transitions. [2022-11-25 15:38:51,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 1236 flow [2022-11-25 15:38:51,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 131 transitions, 1010 flow, removed 111 selfloop flow, removed 8 redundant places. [2022-11-25 15:38:51,920 INFO L231 Difference]: Finished difference. Result has 74 places, 85 transitions, 833 flow [2022-11-25 15:38:51,920 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=833, PETRI_PLACES=74, PETRI_TRANSITIONS=85} [2022-11-25 15:38:51,921 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2022-11-25 15:38:51,921 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 85 transitions, 833 flow [2022-11-25 15:38:51,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.56521739130434) internal successors, (1968), 23 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:51,922 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:51,923 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:51,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:52,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 15:38:52,130 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash 95596691, now seen corresponding path program 2 times [2022-11-25 15:38:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:52,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536578504] [2022-11-25 15:38:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536578504] [2022-11-25 15:38:54,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536578504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:54,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802777495] [2022-11-25 15:38:54,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:38:54,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:54,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:54,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:54,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:38:54,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:38:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:38:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:38:54,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:54,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:54,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 76 [2022-11-25 15:38:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:38:55,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802777495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:55,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:55,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2022-11-25 15:38:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357824603] [2022-11-25 15:38:55,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:55,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:38:55,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:38:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:38:57,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 311 [2022-11-25 15:38:57,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 85 transitions, 833 flow. Second operand has 19 states, 19 states have (on average 105.84210526315789) internal successors, (2011), 19 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:57,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:57,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 311 [2022-11-25 15:38:57,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:59,351 INFO L130 PetriNetUnfolder]: 410/741 cut-off events. [2022-11-25 15:38:59,352 INFO L131 PetriNetUnfolder]: For 1885/1885 co-relation queries the response was YES. [2022-11-25 15:38:59,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3330 conditions, 741 events. 410/741 cut-off events. For 1885/1885 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3321 event pairs, 40 based on Foata normal form. 12/737 useless extension candidates. Maximal degree in co-relation 3298. Up to 535 conditions per place. [2022-11-25 15:38:59,361 INFO L137 encePairwiseOnDemand]: 302/311 looper letters, 89 selfloop transitions, 35 changer transitions 5/129 dead transitions. [2022-11-25 15:38:59,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 129 transitions, 1341 flow [2022-11-25 15:38:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:38:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:38:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1939 transitions. [2022-11-25 15:38:59,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3463737048946052 [2022-11-25 15:38:59,371 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1939 transitions. [2022-11-25 15:38:59,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1939 transitions. [2022-11-25 15:38:59,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:59,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1939 transitions. [2022-11-25 15:38:59,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 107.72222222222223) internal successors, (1939), 18 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:59,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 311.0) internal successors, (5909), 19 states have internal predecessors, (5909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:59,403 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 311.0) internal successors, (5909), 19 states have internal predecessors, (5909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:59,404 INFO L175 Difference]: Start difference. First operand has 74 places, 85 transitions, 833 flow. Second operand 18 states and 1939 transitions. [2022-11-25 15:38:59,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 129 transitions, 1341 flow [2022-11-25 15:38:59,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 129 transitions, 1171 flow, removed 80 selfloop flow, removed 5 redundant places. [2022-11-25 15:38:59,421 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 901 flow [2022-11-25 15:38:59,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=901, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2022-11-25 15:38:59,423 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2022-11-25 15:38:59,423 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 901 flow [2022-11-25 15:38:59,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.84210526315789) internal successors, (2011), 19 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:59,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:59,424 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:59,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 15:38:59,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:38:59,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:38:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash 508791962, now seen corresponding path program 1 times [2022-11-25 15:38:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:59,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416079916] [2022-11-25 15:38:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:59,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:59,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416079916] [2022-11-25 15:38:59,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416079916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:59,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700160512] [2022-11-25 15:38:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:59,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:59,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:59,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:00,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:39:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:39:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:00,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:01,473 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-11-25 15:39:01,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 197 [2022-11-25 15:39:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:01,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700160512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:01,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:01,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-25 15:39:01,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423702218] [2022-11-25 15:39:01,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:01,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:39:01,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:01,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:39:01,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:39:02,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 311 [2022-11-25 15:39:02,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 901 flow. Second operand has 19 states, 19 states have (on average 118.73684210526316) internal successors, (2256), 19 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:02,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:02,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 311 [2022-11-25 15:39:02,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:02,744 INFO L130 PetriNetUnfolder]: 266/521 cut-off events. [2022-11-25 15:39:02,744 INFO L131 PetriNetUnfolder]: For 1763/1777 co-relation queries the response was YES. [2022-11-25 15:39:02,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 521 events. 266/521 cut-off events. For 1763/1777 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2337 event pairs, 132 based on Foata normal form. 24/519 useless extension candidates. Maximal degree in co-relation 2399. Up to 360 conditions per place. [2022-11-25 15:39:02,751 INFO L137 encePairwiseOnDemand]: 306/311 looper letters, 71 selfloop transitions, 10 changer transitions 3/88 dead transitions. [2022-11-25 15:39:02,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 970 flow [2022-11-25 15:39:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:39:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:39:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1090 transitions. [2022-11-25 15:39:02,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3894247945694891 [2022-11-25 15:39:02,756 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1090 transitions. [2022-11-25 15:39:02,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1090 transitions. [2022-11-25 15:39:02,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:02,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1090 transitions. [2022-11-25 15:39:02,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.11111111111111) internal successors, (1090), 9 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:02,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:02,765 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:02,766 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 901 flow. Second operand 9 states and 1090 transitions. [2022-11-25 15:39:02,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 970 flow [2022-11-25 15:39:02,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 897 flow, removed 8 selfloop flow, removed 14 redundant places. [2022-11-25 15:39:02,778 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 671 flow [2022-11-25 15:39:02,778 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2022-11-25 15:39:02,779 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2022-11-25 15:39:02,779 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 671 flow [2022-11-25 15:39:02,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 118.73684210526316) internal successors, (2256), 19 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:02,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:02,780 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:02,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:02,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:39:02,987 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:39:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 16412628, now seen corresponding path program 2 times [2022-11-25 15:39:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48935490] [2022-11-25 15:39:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:02,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:04,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:04,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48935490] [2022-11-25 15:39:04,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48935490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:04,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472610894] [2022-11-25 15:39:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:39:04,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:04,400 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:04,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:39:04,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:39:04,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 15:39:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:04,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:39:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:39:04,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 15:39:04,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:39:04,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 15:39:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:05,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:07,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:07,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-11-25 15:39:07,150 INFO L321 Elim1Store]: treesize reduction 14, result has 86.7 percent of original size [2022-11-25 15:39:07,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 283 treesize of output 331 [2022-11-25 15:39:07,222 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 15:39:07,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 222 [2022-11-25 15:39:07,294 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 15:39:07,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 167 [2022-11-25 15:39:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:13,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472610894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:13,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:13,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 30 [2022-11-25 15:39:13,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512471803] [2022-11-25 15:39:13,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:13,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 15:39:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:13,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 15:39:13,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=783, Unknown=2, NotChecked=0, Total=992 [2022-11-25 15:39:15,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 311 [2022-11-25 15:39:15,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 671 flow. Second operand has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:15,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:15,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 311 [2022-11-25 15:39:15,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:22,641 INFO L130 PetriNetUnfolder]: 373/697 cut-off events. [2022-11-25 15:39:22,641 INFO L131 PetriNetUnfolder]: For 2114/2114 co-relation queries the response was YES. [2022-11-25 15:39:22,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3077 conditions, 697 events. 373/697 cut-off events. For 2114/2114 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3171 event pairs, 62 based on Foata normal form. 16/705 useless extension candidates. Maximal degree in co-relation 3044. Up to 442 conditions per place. [2022-11-25 15:39:22,651 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 80 selfloop transitions, 49 changer transitions 7/136 dead transitions. [2022-11-25 15:39:22,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 136 transitions, 1216 flow [2022-11-25 15:39:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 15:39:22,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 15:39:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2423 transitions. [2022-11-25 15:39:22,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2686550615367557 [2022-11-25 15:39:22,658 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2423 transitions. [2022-11-25 15:39:22,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2423 transitions. [2022-11-25 15:39:22,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:22,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2423 transitions. [2022-11-25 15:39:22,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 83.55172413793103) internal successors, (2423), 29 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:22,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 311.0) internal successors, (9330), 30 states have internal predecessors, (9330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:22,683 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 311.0) internal successors, (9330), 30 states have internal predecessors, (9330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:22,683 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 671 flow. Second operand 29 states and 2423 transitions. [2022-11-25 15:39:22,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 136 transitions, 1216 flow [2022-11-25 15:39:22,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1199 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-25 15:39:22,697 INFO L231 Difference]: Finished difference. Result has 106 places, 87 transitions, 922 flow [2022-11-25 15:39:22,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=922, PETRI_PLACES=106, PETRI_TRANSITIONS=87} [2022-11-25 15:39:22,698 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2022-11-25 15:39:22,698 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 87 transitions, 922 flow [2022-11-25 15:39:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:22,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:22,700 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:22,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:22,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:39:22,907 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:39:22,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -160286439, now seen corresponding path program 2 times [2022-11-25 15:39:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:22,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530876037] [2022-11-25 15:39:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:24,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:24,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530876037] [2022-11-25 15:39:24,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530876037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:24,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611876751] [2022-11-25 15:39:24,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:39:24,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:24,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:24,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:24,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:39:24,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:39:24,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:24,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 15:39:24,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:24,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:39:24,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:39:24,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:39:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:25,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:26,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:26,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-25 15:39:26,499 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 15:39:26,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 562 treesize of output 532 [2022-11-25 15:39:26,567 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 15:39:26,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 494 treesize of output 428 [2022-11-25 15:39:26,629 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 15:39:26,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 390 treesize of output 376 [2022-11-25 15:39:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:28,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611876751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:28,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:28,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-25 15:39:28,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604642896] [2022-11-25 15:39:28,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:28,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 15:39:28,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:28,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 15:39:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=820, Unknown=1, NotChecked=0, Total=992 [2022-11-25 15:39:31,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 311 [2022-11-25 15:39:31,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 87 transitions, 922 flow. Second operand has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:31,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:31,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 311 [2022-11-25 15:39:31,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:36,048 INFO L130 PetriNetUnfolder]: 423/771 cut-off events. [2022-11-25 15:39:36,049 INFO L131 PetriNetUnfolder]: For 3044/3044 co-relation queries the response was YES. [2022-11-25 15:39:36,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 771 events. 423/771 cut-off events. For 3044/3044 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3417 event pairs, 78 based on Foata normal form. 20/775 useless extension candidates. Maximal degree in co-relation 3771. Up to 556 conditions per place. [2022-11-25 15:39:36,059 INFO L137 encePairwiseOnDemand]: 300/311 looper letters, 84 selfloop transitions, 45 changer transitions 7/136 dead transitions. [2022-11-25 15:39:36,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 136 transitions, 1402 flow [2022-11-25 15:39:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 15:39:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 15:39:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2252 transitions. [2022-11-25 15:39:36,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.26819102060259614 [2022-11-25 15:39:36,067 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2252 transitions. [2022-11-25 15:39:36,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2252 transitions. [2022-11-25 15:39:36,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:36,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2252 transitions. [2022-11-25 15:39:36,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 83.4074074074074) internal successors, (2252), 27 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:36,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 311.0) internal successors, (8708), 28 states have internal predecessors, (8708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:36,087 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 311.0) internal successors, (8708), 28 states have internal predecessors, (8708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:36,087 INFO L175 Difference]: Start difference. First operand has 106 places, 87 transitions, 922 flow. Second operand 27 states and 2252 transitions. [2022-11-25 15:39:36,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 136 transitions, 1402 flow [2022-11-25 15:39:36,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 136 transitions, 1310 flow, removed 19 selfloop flow, removed 17 redundant places. [2022-11-25 15:39:36,108 INFO L231 Difference]: Finished difference. Result has 119 places, 94 transitions, 1035 flow [2022-11-25 15:39:36,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1035, PETRI_PLACES=119, PETRI_TRANSITIONS=94} [2022-11-25 15:39:36,109 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2022-11-25 15:39:36,109 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 94 transitions, 1035 flow [2022-11-25 15:39:36,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:36,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:36,110 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:36,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 15:39:36,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 15:39:36,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:39:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -160545909, now seen corresponding path program 3 times [2022-11-25 15:39:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:36,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211767816] [2022-11-25 15:39:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:37,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:37,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211767816] [2022-11-25 15:39:37,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211767816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:37,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118118335] [2022-11-25 15:39:37,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:39:37,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:37,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:37,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:37,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:39:37,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:39:37,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:37,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 15:39:38,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:38,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:39:38,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:39:38,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:39:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:38,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:40,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:40,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 105 [2022-11-25 15:39:40,254 INFO L321 Elim1Store]: treesize reduction 31, result has 41.5 percent of original size [2022-11-25 15:39:40,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 337 treesize of output 315 [2022-11-25 15:39:40,287 INFO L321 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2022-11-25 15:39:40,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 294 treesize of output 242 [2022-11-25 15:39:40,319 INFO L321 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2022-11-25 15:39:40,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 180 treesize of output 161 [2022-11-25 15:39:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:40,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118118335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:40,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:40,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-11-25 15:39:40,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496341174] [2022-11-25 15:39:40,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:40,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 15:39:40,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:40,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 15:39:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=888, Unknown=3, NotChecked=0, Total=1122 [2022-11-25 15:39:43,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 311 [2022-11-25 15:39:43,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 94 transitions, 1035 flow. Second operand has 34 states, 34 states have (on average 81.23529411764706) internal successors, (2762), 34 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:43,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:43,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 311 [2022-11-25 15:39:43,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:49,035 INFO L130 PetriNetUnfolder]: 491/883 cut-off events. [2022-11-25 15:39:49,035 INFO L131 PetriNetUnfolder]: For 4176/4176 co-relation queries the response was YES. [2022-11-25 15:39:49,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 883 events. 491/883 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4025 event pairs, 86 based on Foata normal form. 20/887 useless extension candidates. Maximal degree in co-relation 4476. Up to 524 conditions per place. [2022-11-25 15:39:49,045 INFO L137 encePairwiseOnDemand]: 300/311 looper letters, 105 selfloop transitions, 53 changer transitions 8/166 dead transitions. [2022-11-25 15:39:49,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 166 transitions, 1722 flow [2022-11-25 15:39:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 15:39:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 15:39:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2839 transitions. [2022-11-25 15:39:49,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2684887459807074 [2022-11-25 15:39:49,054 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2839 transitions. [2022-11-25 15:39:49,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2839 transitions. [2022-11-25 15:39:49,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:49,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2839 transitions. [2022-11-25 15:39:49,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 83.5) internal successors, (2839), 34 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:49,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 311.0) internal successors, (10885), 35 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:49,076 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 311.0) internal successors, (10885), 35 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:49,076 INFO L175 Difference]: Start difference. First operand has 119 places, 94 transitions, 1035 flow. Second operand 34 states and 2839 transitions. [2022-11-25 15:39:49,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 166 transitions, 1722 flow [2022-11-25 15:39:49,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 166 transitions, 1597 flow, removed 20 selfloop flow, removed 22 redundant places. [2022-11-25 15:39:49,103 INFO L231 Difference]: Finished difference. Result has 135 places, 104 transitions, 1172 flow [2022-11-25 15:39:49,103 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1172, PETRI_PLACES=135, PETRI_TRANSITIONS=104} [2022-11-25 15:39:49,104 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2022-11-25 15:39:49,104 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 104 transitions, 1172 flow [2022-11-25 15:39:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 81.23529411764706) internal successors, (2762), 34 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:49,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:49,105 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:49,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:49,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 15:39:49,312 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:39:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:49,313 INFO L85 PathProgramCache]: Analyzing trace with hash -160286442, now seen corresponding path program 3 times [2022-11-25 15:39:49,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:49,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992699958] [2022-11-25 15:39:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:49,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:50,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992699958] [2022-11-25 15:39:50,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992699958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101403620] [2022-11-25 15:39:50,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:39:50,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:50,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:50,630 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:50,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:39:50,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:39:50,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 15:39:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:50,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:39:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:39:51,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:39:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:39:51,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:39:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:51,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:52,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:52,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-11-25 15:39:53,115 INFO L321 Elim1Store]: treesize reduction 14, result has 86.7 percent of original size [2022-11-25 15:39:53,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 583 treesize of output 597 [2022-11-25 15:39:53,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:39:53,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:53,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 401 treesize of output 387 [2022-11-25 15:39:53,223 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 15:39:53,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 450 treesize of output 384 [2022-11-25 15:39:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:58,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101403620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:58,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:58,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-25 15:39:58,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426867227] [2022-11-25 15:39:58,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:58,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 15:39:58,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:58,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 15:39:58,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=731, Unknown=2, NotChecked=0, Total=930 [2022-11-25 15:40:00,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 311 [2022-11-25 15:40:00,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 104 transitions, 1172 flow. Second operand has 31 states, 31 states have (on average 81.35483870967742) internal successors, (2522), 31 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:00,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:00,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 311 [2022-11-25 15:40:00,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:07,045 INFO L130 PetriNetUnfolder]: 471/859 cut-off events. [2022-11-25 15:40:07,045 INFO L131 PetriNetUnfolder]: For 4260/4260 co-relation queries the response was YES. [2022-11-25 15:40:07,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4489 conditions, 859 events. 471/859 cut-off events. For 4260/4260 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3927 event pairs, 104 based on Foata normal form. 12/863 useless extension candidates. Maximal degree in co-relation 4443. Up to 616 conditions per place. [2022-11-25 15:40:07,058 INFO L137 encePairwiseOnDemand]: 302/311 looper letters, 88 selfloop transitions, 43 changer transitions 17/148 dead transitions. [2022-11-25 15:40:07,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 148 transitions, 1568 flow [2022-11-25 15:40:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 15:40:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 15:40:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2581 transitions. [2022-11-25 15:40:07,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2677108183798361 [2022-11-25 15:40:07,067 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2581 transitions. [2022-11-25 15:40:07,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2581 transitions. [2022-11-25 15:40:07,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:07,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2581 transitions. [2022-11-25 15:40:07,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 83.25806451612904) internal successors, (2581), 31 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:07,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 311.0) internal successors, (9952), 32 states have internal predecessors, (9952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:07,086 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 311.0) internal successors, (9952), 32 states have internal predecessors, (9952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:07,086 INFO L175 Difference]: Start difference. First operand has 135 places, 104 transitions, 1172 flow. Second operand 31 states and 2581 transitions. [2022-11-25 15:40:07,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 148 transitions, 1568 flow [2022-11-25 15:40:07,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 148 transitions, 1450 flow, removed 20 selfloop flow, removed 23 redundant places. [2022-11-25 15:40:07,171 INFO L231 Difference]: Finished difference. Result has 142 places, 98 transitions, 1075 flow [2022-11-25 15:40:07,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1075, PETRI_PLACES=142, PETRI_TRANSITIONS=98} [2022-11-25 15:40:07,172 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2022-11-25 15:40:07,172 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 98 transitions, 1075 flow [2022-11-25 15:40:07,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 81.35483870967742) internal successors, (2522), 31 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:07,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:07,173 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:40:07,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:07,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 15:40:07,374 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:40:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash 358107517, now seen corresponding path program 4 times [2022-11-25 15:40:07,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:07,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027335478] [2022-11-25 15:40:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:09,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:09,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027335478] [2022-11-25 15:40:09,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027335478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:09,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655989297] [2022-11-25 15:40:09,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:40:09,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:09,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:09,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:09,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 15:40:09,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:40:09,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:40:09,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:40:09,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:10,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:11,618 INFO L321 Elim1Store]: treesize reduction 40, result has 61.9 percent of original size [2022-11-25 15:40:11,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 302 treesize of output 283 [2022-11-25 15:40:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:13,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655989297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:40:13,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:40:13,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 35 [2022-11-25 15:40:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816591133] [2022-11-25 15:40:13,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:40:13,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 15:40:13,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:13,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 15:40:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 15:40:17,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 311 [2022-11-25 15:40:17,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 98 transitions, 1075 flow. Second operand has 37 states, 37 states have (on average 103.29729729729729) internal successors, (3822), 37 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:17,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:17,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 311 [2022-11-25 15:40:17,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:26,629 INFO L130 PetriNetUnfolder]: 895/1543 cut-off events. [2022-11-25 15:40:26,629 INFO L131 PetriNetUnfolder]: For 11228/11228 co-relation queries the response was YES. [2022-11-25 15:40:26,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8450 conditions, 1543 events. 895/1543 cut-off events. For 11228/11228 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7966 event pairs, 44 based on Foata normal form. 66/1601 useless extension candidates. Maximal degree in co-relation 8405. Up to 591 conditions per place. [2022-11-25 15:40:26,647 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 166 selfloop transitions, 160 changer transitions 6/332 dead transitions. [2022-11-25 15:40:26,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 332 transitions, 3740 flow [2022-11-25 15:40:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 15:40:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-25 15:40:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 6170 transitions. [2022-11-25 15:40:26,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3420556602727575 [2022-11-25 15:40:26,660 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 6170 transitions. [2022-11-25 15:40:26,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 6170 transitions. [2022-11-25 15:40:26,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:26,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 6170 transitions. [2022-11-25 15:40:26,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 106.37931034482759) internal successors, (6170), 58 states have internal predecessors, (6170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:26,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 311.0) internal successors, (18349), 59 states have internal predecessors, (18349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:26,696 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 311.0) internal successors, (18349), 59 states have internal predecessors, (18349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:26,697 INFO L175 Difference]: Start difference. First operand has 142 places, 98 transitions, 1075 flow. Second operand 58 states and 6170 transitions. [2022-11-25 15:40:26,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 332 transitions, 3740 flow [2022-11-25 15:40:26,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 332 transitions, 3631 flow, removed 7 selfloop flow, removed 28 redundant places. [2022-11-25 15:40:26,758 INFO L231 Difference]: Finished difference. Result has 181 places, 226 transitions, 3274 flow [2022-11-25 15:40:26,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=3274, PETRI_PLACES=181, PETRI_TRANSITIONS=226} [2022-11-25 15:40:26,759 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2022-11-25 15:40:26,760 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 226 transitions, 3274 flow [2022-11-25 15:40:26,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 103.29729729729729) internal successors, (3822), 37 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:26,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:26,761 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:40:26,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:26,968 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:40:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash 535066054, now seen corresponding path program 4 times [2022-11-25 15:40:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:26,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097730837] [2022-11-25 15:40:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:26,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:28,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097730837] [2022-11-25 15:40:28,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097730837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:28,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218490486] [2022-11-25 15:40:28,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:40:28,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:28,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:28,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:28,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 15:40:28,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:40:28,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:40:28,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 15:40:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:28,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:40:28,699 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 15:40:28,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 15:40:28,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:40:28,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-25 15:40:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:40:28,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-25 15:40:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:29,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:31,965 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-25 15:40:31,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 190 treesize of output 128 [2022-11-25 15:40:32,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:32,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 367 treesize of output 462 [2022-11-25 15:40:32,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:32,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 303 treesize of output 317 [2022-11-25 15:40:32,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:32,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 208 treesize of output 255 [2022-11-25 15:41:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218490486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:02,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2022-11-25 15:41:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646080575] [2022-11-25 15:41:02,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:02,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:41:02,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:41:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1213, Unknown=4, NotChecked=0, Total=1482 [2022-11-25 15:41:07,126 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 311 [2022-11-25 15:41:07,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 226 transitions, 3274 flow. Second operand has 39 states, 39 states have (on average 81.23076923076923) internal successors, (3168), 39 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:07,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:07,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 311 [2022-11-25 15:41:07,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:12,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:41:20,736 INFO L130 PetriNetUnfolder]: 954/1671 cut-off events. [2022-11-25 15:41:20,737 INFO L131 PetriNetUnfolder]: For 17294/17294 co-relation queries the response was YES. [2022-11-25 15:41:20,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10133 conditions, 1671 events. 954/1671 cut-off events. For 17294/17294 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8905 event pairs, 60 based on Foata normal form. 100/1763 useless extension candidates. Maximal degree in co-relation 10073. Up to 800 conditions per place. [2022-11-25 15:41:20,766 INFO L137 encePairwiseOnDemand]: 300/311 looper letters, 157 selfloop transitions, 169 changer transitions 8/334 dead transitions. [2022-11-25 15:41:20,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 334 transitions, 4581 flow [2022-11-25 15:41:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 15:41:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-25 15:41:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3857 transitions. [2022-11-25 15:41:20,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2696071578358731 [2022-11-25 15:41:20,776 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3857 transitions. [2022-11-25 15:41:20,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3857 transitions. [2022-11-25 15:41:20,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:20,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3857 transitions. [2022-11-25 15:41:20,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 83.84782608695652) internal successors, (3857), 46 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:20,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 311.0) internal successors, (14617), 47 states have internal predecessors, (14617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:20,803 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 311.0) internal successors, (14617), 47 states have internal predecessors, (14617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:20,803 INFO L175 Difference]: Start difference. First operand has 181 places, 226 transitions, 3274 flow. Second operand 46 states and 3857 transitions. [2022-11-25 15:41:20,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 334 transitions, 4581 flow [2022-11-25 15:41:20,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 334 transitions, 3404 flow, removed 564 selfloop flow, removed 16 redundant places. [2022-11-25 15:41:20,921 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3159 flow [2022-11-25 15:41:20,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3159, PETRI_PLACES=216, PETRI_TRANSITIONS=258} [2022-11-25 15:41:20,923 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2022-11-25 15:41:20,923 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3159 flow [2022-11-25 15:41:20,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 81.23076923076923) internal successors, (3168), 39 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:20,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:20,924 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:20,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:21,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:21,145 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:41:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash -824336890, now seen corresponding path program 5 times [2022-11-25 15:41:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:21,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010673927] [2022-11-25 15:41:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:21,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:22,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010673927] [2022-11-25 15:41:22,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010673927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328974335] [2022-11-25 15:41:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:41:22,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:22,839 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:22,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 15:41:23,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:41:23,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:23,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 15:41:23,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:23,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:41:23,290 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 15:41:23,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 15:41:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:41:23,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-25 15:41:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:41:23,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-25 15:41:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:24,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:27,309 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-25 15:41:27,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 190 treesize of output 128 [2022-11-25 15:41:27,469 INFO L321 Elim1Store]: treesize reduction 42, result has 71.4 percent of original size [2022-11-25 15:41:27,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 367 treesize of output 420 [2022-11-25 15:41:27,551 INFO L321 Elim1Store]: treesize reduction 42, result has 48.1 percent of original size [2022-11-25 15:41:27,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 303 treesize of output 275 [2022-11-25 15:41:27,634 INFO L321 Elim1Store]: treesize reduction 42, result has 48.1 percent of original size [2022-11-25 15:41:27,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 208 treesize of output 213 [2022-11-25 15:41:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:39,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328974335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:39,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:39,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2022-11-25 15:41:39,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841445999] [2022-11-25 15:41:39,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:41:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:41:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1243, Unknown=2, NotChecked=0, Total=1482 [2022-11-25 15:41:41,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 311 [2022-11-25 15:41:41,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 258 transitions, 3159 flow. Second operand has 39 states, 39 states have (on average 81.23076923076923) internal successors, (3168), 39 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:41,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:41,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 311 [2022-11-25 15:41:41,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:11,862 INFO L130 PetriNetUnfolder]: 1516/2605 cut-off events. [2022-11-25 15:42:11,863 INFO L131 PetriNetUnfolder]: For 42504/42504 co-relation queries the response was YES. [2022-11-25 15:42:11,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17121 conditions, 2605 events. 1516/2605 cut-off events. For 42504/42504 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14065 event pairs, 152 based on Foata normal form. 98/2687 useless extension candidates. Maximal degree in co-relation 17049. Up to 1184 conditions per place. [2022-11-25 15:42:11,966 INFO L137 encePairwiseOnDemand]: 299/311 looper letters, 293 selfloop transitions, 241 changer transitions 9/543 dead transitions. [2022-11-25 15:42:11,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 543 transitions, 7972 flow [2022-11-25 15:42:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-25 15:42:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-11-25 15:42:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6417 transitions. [2022-11-25 15:42:11,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2714926383482823 [2022-11-25 15:42:11,990 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6417 transitions. [2022-11-25 15:42:11,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6417 transitions. [2022-11-25 15:42:11,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:11,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6417 transitions. [2022-11-25 15:42:12,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 84.4342105263158) internal successors, (6417), 76 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 311.0) internal successors, (23947), 77 states have internal predecessors, (23947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,043 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 311.0) internal successors, (23947), 77 states have internal predecessors, (23947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,043 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3159 flow. Second operand 76 states and 6417 transitions. [2022-11-25 15:42:12,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 543 transitions, 7972 flow [2022-11-25 15:42:12,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 543 transitions, 7338 flow, removed 275 selfloop flow, removed 22 redundant places. [2022-11-25 15:42:12,335 INFO L231 Difference]: Finished difference. Result has 277 places, 404 transitions, 6592 flow [2022-11-25 15:42:12,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=6592, PETRI_PLACES=277, PETRI_TRANSITIONS=404} [2022-11-25 15:42:12,336 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2022-11-25 15:42:12,336 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 404 transitions, 6592 flow [2022-11-25 15:42:12,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 81.23076923076923) internal successors, (3168), 39 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:12,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:12,337 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:12,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 15:42:12,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:12,545 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:42:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash -824336887, now seen corresponding path program 5 times [2022-11-25 15:42:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:12,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485395751] [2022-11-25 15:42:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:12,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:14,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:14,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485395751] [2022-11-25 15:42:14,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485395751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:14,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047150392] [2022-11-25 15:42:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:42:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:14,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:14,334 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:14,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 15:42:14,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:42:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:42:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 15:42:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:15,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:16,736 INFO L321 Elim1Store]: treesize reduction 64, result has 39.0 percent of original size [2022-11-25 15:42:16,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 278 treesize of output 235 [2022-11-25 15:42:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:17,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047150392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:42:17,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:42:17,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 34 [2022-11-25 15:42:17,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581089146] [2022-11-25 15:42:17,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:17,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 15:42:17,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:17,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 15:42:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 15:42:22,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 311 [2022-11-25 15:42:22,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 404 transitions, 6592 flow. Second operand has 36 states, 36 states have (on average 103.33333333333333) internal successors, (3720), 36 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:22,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:22,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 311 [2022-11-25 15:42:22,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:29,864 INFO L130 PetriNetUnfolder]: 1702/2919 cut-off events. [2022-11-25 15:42:29,864 INFO L131 PetriNetUnfolder]: For 44404/44404 co-relation queries the response was YES. [2022-11-25 15:42:29,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19548 conditions, 2919 events. 1702/2919 cut-off events. For 44404/44404 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15520 event pairs, 120 based on Foata normal form. 52/2955 useless extension candidates. Maximal degree in co-relation 19467. Up to 1811 conditions per place. [2022-11-25 15:42:29,925 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 338 selfloop transitions, 194 changer transitions 11/543 dead transitions. [2022-11-25 15:42:29,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 543 transitions, 9121 flow [2022-11-25 15:42:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 15:42:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-25 15:42:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4548 transitions. [2022-11-25 15:42:29,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34008823749345696 [2022-11-25 15:42:29,933 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4548 transitions. [2022-11-25 15:42:29,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4548 transitions. [2022-11-25 15:42:29,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:29,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4548 transitions. [2022-11-25 15:42:29,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 105.76744186046511) internal successors, (4548), 43 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:30,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 311.0) internal successors, (13684), 44 states have internal predecessors, (13684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:30,072 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 311.0) internal successors, (13684), 44 states have internal predecessors, (13684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:30,072 INFO L175 Difference]: Start difference. First operand has 277 places, 404 transitions, 6592 flow. Second operand 43 states and 4548 transitions. [2022-11-25 15:42:30,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 543 transitions, 9121 flow [2022-11-25 15:42:30,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 543 transitions, 5811 flow, removed 1616 selfloop flow, removed 24 redundant places. [2022-11-25 15:42:30,499 INFO L231 Difference]: Finished difference. Result has 303 places, 453 transitions, 5079 flow [2022-11-25 15:42:30,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=3948, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5079, PETRI_PLACES=303, PETRI_TRANSITIONS=453} [2022-11-25 15:42:30,500 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2022-11-25 15:42:30,500 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 453 transitions, 5079 flow [2022-11-25 15:42:30,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 103.33333333333333) internal successors, (3720), 36 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:30,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:30,502 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:30,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 15:42:30,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:30,718 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:42:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:30,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1407312970, now seen corresponding path program 6 times [2022-11-25 15:42:30,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:30,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705447282] [2022-11-25 15:42:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:30,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:42:30,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:30,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705447282] [2022-11-25 15:42:30,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705447282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:30,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179488026] [2022-11-25 15:42:30,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:42:30,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:30,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:30,966 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:30,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 15:42:31,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:42:31,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:42:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 15:42:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:31,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2022-11-25 15:42:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:31,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:31,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2022-11-25 15:42:31,629 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 15:42:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:31,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179488026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:42:31,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:42:31,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2022-11-25 15:42:31,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761524071] [2022-11-25 15:42:31,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:31,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:42:31,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:42:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:42:32,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 311 [2022-11-25 15:42:32,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 453 transitions, 5079 flow. Second operand has 21 states, 21 states have (on average 118.23809523809524) internal successors, (2483), 21 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:32,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:32,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 311 [2022-11-25 15:42:32,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:34,148 INFO L130 PetriNetUnfolder]: 2252/3881 cut-off events. [2022-11-25 15:42:34,148 INFO L131 PetriNetUnfolder]: For 29924/29924 co-relation queries the response was YES. [2022-11-25 15:42:34,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20029 conditions, 3881 events. 2252/3881 cut-off events. For 29924/29924 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21948 event pairs, 298 based on Foata normal form. 124/3837 useless extension candidates. Maximal degree in co-relation 19941. Up to 2165 conditions per place. [2022-11-25 15:42:34,196 INFO L137 encePairwiseOnDemand]: 302/311 looper letters, 382 selfloop transitions, 182 changer transitions 53/617 dead transitions. [2022-11-25 15:42:34,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 617 transitions, 7939 flow [2022-11-25 15:42:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 15:42:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 15:42:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2413 transitions. [2022-11-25 15:42:34,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38794212218649515 [2022-11-25 15:42:34,203 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2413 transitions. [2022-11-25 15:42:34,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2413 transitions. [2022-11-25 15:42:34,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:34,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2413 transitions. [2022-11-25 15:42:34,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 120.65) internal successors, (2413), 20 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:34,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 311.0) internal successors, (6531), 21 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:34,221 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 311.0) internal successors, (6531), 21 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:34,221 INFO L175 Difference]: Start difference. First operand has 303 places, 453 transitions, 5079 flow. Second operand 20 states and 2413 transitions. [2022-11-25 15:42:34,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 617 transitions, 7939 flow [2022-11-25 15:42:34,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 617 transitions, 7640 flow, removed 78 selfloop flow, removed 30 redundant places. [2022-11-25 15:42:34,574 INFO L231 Difference]: Finished difference. Result has 299 places, 528 transitions, 6541 flow [2022-11-25 15:42:34,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=4842, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6541, PETRI_PLACES=299, PETRI_TRANSITIONS=528} [2022-11-25 15:42:34,575 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 269 predicate places. [2022-11-25 15:42:34,575 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 528 transitions, 6541 flow [2022-11-25 15:42:34,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 118.23809523809524) internal successors, (2483), 21 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:34,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:34,577 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:34,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 15:42:34,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 15:42:34,784 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:42:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:34,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1102059253, now seen corresponding path program 4 times [2022-11-25 15:42:34,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:34,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195294989] [2022-11-25 15:42:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:34,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:36,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195294989] [2022-11-25 15:42:36,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195294989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96382546] [2022-11-25 15:42:36,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:42:36,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:36,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:36,921 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:36,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 15:42:37,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:42:37,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:42:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 15:42:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:42:37,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:38,300 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-11-25 15:42:38,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 261 treesize of output 229 [2022-11-25 15:42:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:42:39,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96382546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:42:39,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:42:39,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 5] total 27 [2022-11-25 15:42:39,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840858681] [2022-11-25 15:42:39,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:39,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 15:42:39,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:39,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 15:42:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-11-25 15:42:42,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 311 [2022-11-25 15:42:42,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 528 transitions, 6541 flow. Second operand has 29 states, 29 states have (on average 109.48275862068965) internal successors, (3175), 29 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:42,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:42,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 311 [2022-11-25 15:42:42,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:45,189 INFO L130 PetriNetUnfolder]: 2172/3716 cut-off events. [2022-11-25 15:42:45,189 INFO L131 PetriNetUnfolder]: For 26683/26683 co-relation queries the response was YES. [2022-11-25 15:42:45,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20721 conditions, 3716 events. 2172/3716 cut-off events. For 26683/26683 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20893 event pairs, 223 based on Foata normal form. 28/3576 useless extension candidates. Maximal degree in co-relation 20635. Up to 3025 conditions per place. [2022-11-25 15:42:45,232 INFO L137 encePairwiseOnDemand]: 303/311 looper letters, 446 selfloop transitions, 127 changer transitions 5/578 dead transitions. [2022-11-25 15:42:45,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 578 transitions, 8090 flow [2022-11-25 15:42:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 15:42:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 15:42:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2242 transitions. [2022-11-25 15:42:45,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36045016077170416 [2022-11-25 15:42:45,238 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2242 transitions. [2022-11-25 15:42:45,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2242 transitions. [2022-11-25 15:42:45,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:45,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2242 transitions. [2022-11-25 15:42:45,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.1) internal successors, (2242), 20 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:45,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 311.0) internal successors, (6531), 21 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:45,250 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 311.0) internal successors, (6531), 21 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:45,250 INFO L175 Difference]: Start difference. First operand has 299 places, 528 transitions, 6541 flow. Second operand 20 states and 2242 transitions. [2022-11-25 15:42:45,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 578 transitions, 8090 flow [2022-11-25 15:42:45,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 578 transitions, 7839 flow, removed 108 selfloop flow, removed 13 redundant places. [2022-11-25 15:42:45,596 INFO L231 Difference]: Finished difference. Result has 281 places, 544 transitions, 6950 flow [2022-11-25 15:42:45,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6950, PETRI_PLACES=281, PETRI_TRANSITIONS=544} [2022-11-25 15:42:45,597 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2022-11-25 15:42:45,597 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 544 transitions, 6950 flow [2022-11-25 15:42:45,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 109.48275862068965) internal successors, (3175), 29 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:45,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:45,598 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:45,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 15:42:45,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 15:42:45,806 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:42:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1523589943, now seen corresponding path program 7 times [2022-11-25 15:42:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:45,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908839485] [2022-11-25 15:42:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:47,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908839485] [2022-11-25 15:42:47,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908839485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462088148] [2022-11-25 15:42:47,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:42:47,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:47,267 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:47,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 15:42:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:47,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 15:42:47,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:42:47,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:48,551 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-11-25 15:42:48,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 266 treesize of output 241 [2022-11-25 15:42:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:42:49,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462088148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:42:49,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:42:49,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 5] total 25 [2022-11-25 15:42:49,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391082086] [2022-11-25 15:42:49,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:49,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 15:42:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 15:42:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:42:51,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 311 [2022-11-25 15:42:51,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 544 transitions, 6950 flow. Second operand has 27 states, 27 states have (on average 106.66666666666667) internal successors, (2880), 27 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:51,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:42:51,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 311 [2022-11-25 15:42:51,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:56,349 INFO L130 PetriNetUnfolder]: 2658/4502 cut-off events. [2022-11-25 15:42:56,349 INFO L131 PetriNetUnfolder]: For 40076/40076 co-relation queries the response was YES. [2022-11-25 15:42:56,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26402 conditions, 4502 events. 2658/4502 cut-off events. For 40076/40076 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26138 event pairs, 198 based on Foata normal form. 76/4402 useless extension candidates. Maximal degree in co-relation 26320. Up to 2831 conditions per place. [2022-11-25 15:42:56,408 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 463 selfloop transitions, 273 changer transitions 8/744 dead transitions. [2022-11-25 15:42:56,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 744 transitions, 10885 flow [2022-11-25 15:42:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 15:42:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-25 15:42:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4155 transitions. [2022-11-25 15:42:56,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35158233203587747 [2022-11-25 15:42:56,415 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4155 transitions. [2022-11-25 15:42:56,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4155 transitions. [2022-11-25 15:42:56,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:56,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4155 transitions. [2022-11-25 15:42:56,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 109.34210526315789) internal successors, (4155), 38 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:56,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 311.0) internal successors, (12129), 39 states have internal predecessors, (12129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:56,438 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 311.0) internal successors, (12129), 39 states have internal predecessors, (12129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:56,439 INFO L175 Difference]: Start difference. First operand has 281 places, 544 transitions, 6950 flow. Second operand 38 states and 4155 transitions. [2022-11-25 15:42:56,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 744 transitions, 10885 flow [2022-11-25 15:42:56,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 744 transitions, 10658 flow, removed 60 selfloop flow, removed 14 redundant places. [2022-11-25 15:42:56,828 INFO L231 Difference]: Finished difference. Result has 316 places, 651 transitions, 9540 flow [2022-11-25 15:42:56,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9540, PETRI_PLACES=316, PETRI_TRANSITIONS=651} [2022-11-25 15:42:56,828 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2022-11-25 15:42:56,829 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 651 transitions, 9540 flow [2022-11-25 15:42:56,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.66666666666667) internal successors, (2880), 27 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:56,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:56,829 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:56,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 15:42:57,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:57,030 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:42:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1204248799, now seen corresponding path program 6 times [2022-11-25 15:42:57,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:42:57,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042239260] [2022-11-25 15:42:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:42:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:59,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:59,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042239260] [2022-11-25 15:42:59,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042239260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:59,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732801039] [2022-11-25 15:42:59,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:42:59,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:59,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:59,215 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:59,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 15:42:59,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:42:59,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:42:59,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 15:42:59,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:42:59,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:00,695 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-11-25 15:43:00,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 234 [2022-11-25 15:43:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:43:01,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732801039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:01,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:01,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 6] total 28 [2022-11-25 15:43:01,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133726926] [2022-11-25 15:43:01,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:01,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 15:43:01,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:01,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 15:43:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-11-25 15:43:05,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 311 [2022-11-25 15:43:05,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 651 transitions, 9540 flow. Second operand has 30 states, 30 states have (on average 104.6) internal successors, (3138), 30 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:05,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:05,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 311 [2022-11-25 15:43:05,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:09,537 INFO L130 PetriNetUnfolder]: 2666/4542 cut-off events. [2022-11-25 15:43:09,537 INFO L131 PetriNetUnfolder]: For 48071/48071 co-relation queries the response was YES. [2022-11-25 15:43:09,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28759 conditions, 4542 events. 2666/4542 cut-off events. For 48071/48071 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26713 event pairs, 184 based on Foata normal form. 60/4438 useless extension candidates. Maximal degree in co-relation 28665. Up to 2953 conditions per place. [2022-11-25 15:43:09,588 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 515 selfloop transitions, 219 changer transitions 10/744 dead transitions. [2022-11-25 15:43:09,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 744 transitions, 11928 flow [2022-11-25 15:43:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 15:43:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 15:43:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3532 transitions. [2022-11-25 15:43:09,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3441488843418104 [2022-11-25 15:43:09,594 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3532 transitions. [2022-11-25 15:43:09,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3532 transitions. [2022-11-25 15:43:09,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:09,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3532 transitions. [2022-11-25 15:43:09,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 107.03030303030303) internal successors, (3532), 33 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:09,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 311.0) internal successors, (10574), 34 states have internal predecessors, (10574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:09,611 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 311.0) internal successors, (10574), 34 states have internal predecessors, (10574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:09,612 INFO L175 Difference]: Start difference. First operand has 316 places, 651 transitions, 9540 flow. Second operand 33 states and 3532 transitions. [2022-11-25 15:43:09,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 744 transitions, 11928 flow [2022-11-25 15:43:10,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 744 transitions, 11122 flow, removed 350 selfloop flow, removed 17 redundant places. [2022-11-25 15:43:10,088 INFO L231 Difference]: Finished difference. Result has 334 places, 652 transitions, 9398 flow [2022-11-25 15:43:10,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=8633, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9398, PETRI_PLACES=334, PETRI_TRANSITIONS=652} [2022-11-25 15:43:10,089 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2022-11-25 15:43:10,089 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 652 transitions, 9398 flow [2022-11-25 15:43:10,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 104.6) internal successors, (3138), 30 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:10,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:10,090 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:10,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 15:43:10,291 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:43:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash 169081190, now seen corresponding path program 7 times [2022-11-25 15:43:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237749639] [2022-11-25 15:43:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:12,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:12,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237749639] [2022-11-25 15:43:12,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237749639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:12,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825575888] [2022-11-25 15:43:12,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:43:12,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:12,761 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:12,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 15:43:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:12,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 15:43:12,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:43:13,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:14,954 INFO L321 Elim1Store]: treesize reduction 40, result has 61.9 percent of original size [2022-11-25 15:43:14,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 297 treesize of output 278 [2022-11-25 15:43:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:43:16,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825575888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:16,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:16,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 30 [2022-11-25 15:43:16,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034242600] [2022-11-25 15:43:16,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:16,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 15:43:16,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:16,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 15:43:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-11-25 15:43:21,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 311 [2022-11-25 15:43:21,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 652 transitions, 9398 flow. Second operand has 32 states, 32 states have (on average 105.5625) internal successors, (3378), 32 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:21,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:21,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 311 [2022-11-25 15:43:21,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:30,631 INFO L130 PetriNetUnfolder]: 3350/5682 cut-off events. [2022-11-25 15:43:30,631 INFO L131 PetriNetUnfolder]: For 70781/70781 co-relation queries the response was YES. [2022-11-25 15:43:30,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37270 conditions, 5682 events. 3350/5682 cut-off events. For 70781/70781 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35195 event pairs, 176 based on Foata normal form. 96/5614 useless extension candidates. Maximal degree in co-relation 37177. Up to 3493 conditions per place. [2022-11-25 15:43:30,755 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 575 selfloop transitions, 372 changer transitions 10/957 dead transitions. [2022-11-25 15:43:30,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 957 transitions, 15524 flow [2022-11-25 15:43:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-25 15:43:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-25 15:43:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 6181 transitions. [2022-11-25 15:43:30,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34867715913578157 [2022-11-25 15:43:30,769 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 6181 transitions. [2022-11-25 15:43:30,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 6181 transitions. [2022-11-25 15:43:30,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:30,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 6181 transitions. [2022-11-25 15:43:30,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 108.43859649122807) internal successors, (6181), 57 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:30,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 311.0) internal successors, (18038), 58 states have internal predecessors, (18038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:30,821 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 311.0) internal successors, (18038), 58 states have internal predecessors, (18038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:30,821 INFO L175 Difference]: Start difference. First operand has 334 places, 652 transitions, 9398 flow. Second operand 57 states and 6181 transitions. [2022-11-25 15:43:30,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 957 transitions, 15524 flow [2022-11-25 15:43:31,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 957 transitions, 15117 flow, removed 81 selfloop flow, removed 21 redundant places. [2022-11-25 15:43:31,729 INFO L231 Difference]: Finished difference. Result has 393 places, 840 transitions, 14303 flow [2022-11-25 15:43:31,730 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=8999, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=14303, PETRI_PLACES=393, PETRI_TRANSITIONS=840} [2022-11-25 15:43:31,730 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 363 predicate places. [2022-11-25 15:43:31,730 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 840 transitions, 14303 flow [2022-11-25 15:43:31,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 105.5625) internal successors, (3378), 32 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:31,731 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:31,731 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:31,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:31,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 15:43:31,932 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:43:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash 687848507, now seen corresponding path program 8 times [2022-11-25 15:43:31,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035074955] [2022-11-25 15:43:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:31,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:34,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035074955] [2022-11-25 15:43:34,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035074955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61798788] [2022-11-25 15:43:34,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:43:34,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:34,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:34,554 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:34,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 15:43:34,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:43:34,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-25 15:43:34,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:34,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:43:35,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 15:43:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:43:35,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:43:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:43:35,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:43:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:43:36,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:39,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:43:39,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 231 treesize of output 136 [2022-11-25 15:43:39,753 INFO L321 Elim1Store]: treesize reduction 14, result has 93.0 percent of original size [2022-11-25 15:43:39,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 813 treesize of output 887 [2022-11-25 15:43:39,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:43:39,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:43:39,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 570 treesize of output 596 [2022-11-25 15:43:40,056 INFO L321 Elim1Store]: treesize reduction 14, result has 88.4 percent of original size [2022-11-25 15:43:40,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 616 treesize of output 562 [2022-11-25 15:44:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:23,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61798788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:23,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:23,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 44 [2022-11-25 15:44:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25891590] [2022-11-25 15:44:23,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:23,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 15:44:23,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 15:44:23,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1728, Unknown=3, NotChecked=0, Total=2070 [2022-11-25 15:44:25,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 311 [2022-11-25 15:44:25,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 840 transitions, 14303 flow. Second operand has 46 states, 46 states have (on average 81.17391304347827) internal successors, (3734), 46 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:25,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:44:25,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 311 [2022-11-25 15:44:25,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:20,142 INFO L130 PetriNetUnfolder]: 4294/7202 cut-off events. [2022-11-25 15:45:20,142 INFO L131 PetriNetUnfolder]: For 136103/136103 co-relation queries the response was YES. [2022-11-25 15:45:20,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54468 conditions, 7202 events. 4294/7202 cut-off events. For 136103/136103 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 46186 event pairs, 377 based on Foata normal form. 128/7154 useless extension candidates. Maximal degree in co-relation 54353. Up to 4684 conditions per place. [2022-11-25 15:45:20,464 INFO L137 encePairwiseOnDemand]: 300/311 looper letters, 838 selfloop transitions, 380 changer transitions 13/1231 dead transitions. [2022-11-25 15:45:20,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 1231 transitions, 23344 flow [2022-11-25 15:45:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-25 15:45:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-11-25 15:45:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 6639 transitions. [2022-11-25 15:45:20,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.27021856811429035 [2022-11-25 15:45:20,474 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 6639 transitions. [2022-11-25 15:45:20,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 6639 transitions. [2022-11-25 15:45:20,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:20,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 6639 transitions. [2022-11-25 15:45:20,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 84.0379746835443) internal successors, (6639), 79 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:20,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 311.0) internal successors, (24880), 80 states have internal predecessors, (24880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:20,512 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 311.0) internal successors, (24880), 80 states have internal predecessors, (24880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:20,512 INFO L175 Difference]: Start difference. First operand has 393 places, 840 transitions, 14303 flow. Second operand 79 states and 6639 transitions. [2022-11-25 15:45:20,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 1231 transitions, 23344 flow [2022-11-25 15:45:22,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1231 transitions, 21081 flow, removed 1089 selfloop flow, removed 19 redundant places. [2022-11-25 15:45:22,260 INFO L231 Difference]: Finished difference. Result has 472 places, 1046 transitions, 19147 flow [2022-11-25 15:45:22,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=12168, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=19147, PETRI_PLACES=472, PETRI_TRANSITIONS=1046} [2022-11-25 15:45:22,262 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 442 predicate places. [2022-11-25 15:45:22,262 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1046 transitions, 19147 flow [2022-11-25 15:45:22,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 81.17391304347827) internal successors, (3734), 46 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:22,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:22,263 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:22,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:22,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 15:45:22,471 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:45:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1641921495, now seen corresponding path program 8 times [2022-11-25 15:45:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045019514] [2022-11-25 15:45:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:22,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:24,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:24,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045019514] [2022-11-25 15:45:24,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045019514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:24,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812773186] [2022-11-25 15:45:24,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:45:24,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:24,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:24,536 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:24,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 15:45:24,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:45:24,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:24,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 15:45:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:45:25,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:27,404 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-11-25 15:45:27,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 308 treesize of output 289 [2022-11-25 15:45:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:45:28,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812773186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:28,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:28,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 36 [2022-11-25 15:45:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287385099] [2022-11-25 15:45:28,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:28,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 15:45:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 15:45:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 15:45:33,811 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 311 [2022-11-25 15:45:33,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1046 transitions, 19147 flow. Second operand has 38 states, 38 states have (on average 104.39473684210526) internal successors, (3967), 38 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:33,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:33,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 311 [2022-11-25 15:45:33,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:45:51,425 INFO L130 PetriNetUnfolder]: 5498/9142 cut-off events. [2022-11-25 15:45:51,425 INFO L131 PetriNetUnfolder]: For 220302/220302 co-relation queries the response was YES. [2022-11-25 15:45:51,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73105 conditions, 9142 events. 5498/9142 cut-off events. For 220302/220302 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 60884 event pairs, 228 based on Foata normal form. 268/9274 useless extension candidates. Maximal degree in co-relation 72971. Up to 4095 conditions per place. [2022-11-25 15:45:51,707 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 837 selfloop transitions, 706 changer transitions 19/1562 dead transitions. [2022-11-25 15:45:51,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1562 transitions, 31706 flow [2022-11-25 15:45:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-25 15:45:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-25 15:45:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 7522 transitions. [2022-11-25 15:45:51,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3455213596692696 [2022-11-25 15:45:51,719 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 7522 transitions. [2022-11-25 15:45:51,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 7522 transitions. [2022-11-25 15:45:51,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:51,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 7522 transitions. [2022-11-25 15:45:51,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 107.45714285714286) internal successors, (7522), 70 states have internal predecessors, (7522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:51,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 311.0) internal successors, (22081), 71 states have internal predecessors, (22081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:51,753 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 311.0) internal successors, (22081), 71 states have internal predecessors, (22081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:51,753 INFO L175 Difference]: Start difference. First operand has 472 places, 1046 transitions, 19147 flow. Second operand 70 states and 7522 transitions. [2022-11-25 15:45:51,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1562 transitions, 31706 flow [2022-11-25 15:45:54,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1562 transitions, 27760 flow, removed 1847 selfloop flow, removed 38 redundant places. [2022-11-25 15:45:54,425 INFO L231 Difference]: Finished difference. Result has 525 places, 1306 transitions, 24333 flow [2022-11-25 15:45:54,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=15327, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=24333, PETRI_PLACES=525, PETRI_TRANSITIONS=1306} [2022-11-25 15:45:54,427 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 495 predicate places. [2022-11-25 15:45:54,427 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 1306 transitions, 24333 flow [2022-11-25 15:45:54,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 104.39473684210526) internal successors, (3967), 38 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:54,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:54,429 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:54,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:54,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 15:45:54,635 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:45:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:54,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1687521839, now seen corresponding path program 9 times [2022-11-25 15:45:54,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:54,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422365683] [2022-11-25 15:45:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:56,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422365683] [2022-11-25 15:45:56,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422365683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:56,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316743740] [2022-11-25 15:45:56,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:45:56,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:56,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:56,539 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:56,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 15:45:56,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:45:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:56,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 15:45:56,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:45:57,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:58,686 INFO L321 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2022-11-25 15:45:58,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 292 treesize of output 240 [2022-11-25 15:45:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:45:59,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316743740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:59,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:59,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 31 [2022-11-25 15:45:59,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557939356] [2022-11-25 15:45:59,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:59,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 15:45:59,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 15:45:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 15:46:02,707 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 311 [2022-11-25 15:46:02,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1306 transitions, 24333 flow. Second operand has 33 states, 33 states have (on average 106.54545454545455) internal successors, (3516), 33 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:02,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:46:02,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 311 [2022-11-25 15:46:02,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:46:16,300 INFO L130 PetriNetUnfolder]: 7002/11598 cut-off events. [2022-11-25 15:46:16,300 INFO L131 PetriNetUnfolder]: For 336985/336985 co-relation queries the response was YES. [2022-11-25 15:46:16,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102627 conditions, 11598 events. 7002/11598 cut-off events. For 336985/336985 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 81319 event pairs, 380 based on Foata normal form. 124/11530 useless extension candidates. Maximal degree in co-relation 102472. Up to 5733 conditions per place. [2022-11-25 15:46:16,587 INFO L137 encePairwiseOnDemand]: 302/311 looper letters, 976 selfloop transitions, 764 changer transitions 7/1747 dead transitions. [2022-11-25 15:46:16,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 1747 transitions, 38196 flow [2022-11-25 15:46:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-25 15:46:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-25 15:46:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 6899 transitions. [2022-11-25 15:46:16,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35211555147246465 [2022-11-25 15:46:16,596 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 6899 transitions. [2022-11-25 15:46:16,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 6899 transitions. [2022-11-25 15:46:16,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:46:16,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 6899 transitions. [2022-11-25 15:46:16,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 109.5079365079365) internal successors, (6899), 63 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:16,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 311.0) internal successors, (19904), 64 states have internal predecessors, (19904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:16,622 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 311.0) internal successors, (19904), 64 states have internal predecessors, (19904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:16,622 INFO L175 Difference]: Start difference. First operand has 525 places, 1306 transitions, 24333 flow. Second operand 63 states and 6899 transitions. [2022-11-25 15:46:16,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 1747 transitions, 38196 flow [2022-11-25 15:46:22,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1747 transitions, 33963 flow, removed 2044 selfloop flow, removed 22 redundant places. [2022-11-25 15:46:22,260 INFO L231 Difference]: Finished difference. Result has 579 places, 1589 transitions, 32260 flow [2022-11-25 15:46:22,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=21125, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=32260, PETRI_PLACES=579, PETRI_TRANSITIONS=1589} [2022-11-25 15:46:22,262 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 549 predicate places. [2022-11-25 15:46:22,262 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1589 transitions, 32260 flow [2022-11-25 15:46:22,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 106.54545454545455) internal successors, (3516), 33 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:22,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:46:22,264 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:22,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 15:46:22,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:22,475 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:46:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1197576920, now seen corresponding path program 10 times [2022-11-25 15:46:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005719976] [2022-11-25 15:46:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:22,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:24,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:24,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005719976] [2022-11-25 15:46:24,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005719976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:46:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708884581] [2022-11-25 15:46:24,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:46:24,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:24,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:46:24,308 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:46:24,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 15:46:24,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:46:24,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:46:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:46:24,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:46:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:25,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:46:26,403 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-11-25 15:46:26,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 302 treesize of output 292 [2022-11-25 15:46:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:28,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708884581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:46:28,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:46:28,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-11-25 15:46:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399538576] [2022-11-25 15:46:28,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:46:28,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 15:46:28,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 15:46:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 15:46:32,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 311 [2022-11-25 15:46:32,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1589 transitions, 32260 flow. Second operand has 41 states, 41 states have (on average 104.3170731707317) internal successors, (4277), 41 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:32,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:46:32,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 311 [2022-11-25 15:46:32,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:46:48,870 INFO L130 PetriNetUnfolder]: 7396/12252 cut-off events. [2022-11-25 15:46:48,870 INFO L131 PetriNetUnfolder]: For 330364/330364 co-relation queries the response was YES. [2022-11-25 15:46:49,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106817 conditions, 12252 events. 7396/12252 cut-off events. For 330364/330364 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 86142 event pairs, 942 based on Foata normal form. 64/12108 useless extension candidates. Maximal degree in co-relation 106650. Up to 10705 conditions per place. [2022-11-25 15:46:49,208 INFO L137 encePairwiseOnDemand]: 302/311 looper letters, 1514 selfloop transitions, 275 changer transitions 7/1796 dead transitions. [2022-11-25 15:46:49,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1796 transitions, 38963 flow [2022-11-25 15:46:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 15:46:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-25 15:46:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5580 transitions. [2022-11-25 15:46:49,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3450408112787534 [2022-11-25 15:46:49,213 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5580 transitions. [2022-11-25 15:46:49,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5580 transitions. [2022-11-25 15:46:49,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:46:49,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5580 transitions. [2022-11-25 15:46:49,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 107.3076923076923) internal successors, (5580), 52 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:49,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 311.0) internal successors, (16483), 53 states have internal predecessors, (16483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:49,228 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 311.0) internal successors, (16483), 53 states have internal predecessors, (16483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:49,228 INFO L175 Difference]: Start difference. First operand has 579 places, 1589 transitions, 32260 flow. Second operand 52 states and 5580 transitions. [2022-11-25 15:46:49,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1796 transitions, 38963 flow [2022-11-25 15:46:57,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1796 transitions, 34244 flow, removed 2268 selfloop flow, removed 22 redundant places. [2022-11-25 15:46:57,267 INFO L231 Difference]: Finished difference. Result has 614 places, 1699 transitions, 31188 flow [2022-11-25 15:46:57,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=27522, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=31188, PETRI_PLACES=614, PETRI_TRANSITIONS=1699} [2022-11-25 15:46:57,270 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 584 predicate places. [2022-11-25 15:46:57,270 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1699 transitions, 31188 flow [2022-11-25 15:46:57,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 104.3170731707317) internal successors, (4277), 41 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:57,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:46:57,271 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:57,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-25 15:46:57,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:57,477 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:46:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1777959276, now seen corresponding path program 9 times [2022-11-25 15:46:57,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:57,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693348674] [2022-11-25 15:46:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:57,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:03,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:47:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693348674] [2022-11-25 15:47:03,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693348674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:47:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118108646] [2022-11-25 15:47:03,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:47:03,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:47:03,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:47:03,035 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:47:03,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 15:47:03,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:47:03,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:47:03,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:47:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:47:03,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:47:04,577 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-25 15:47:04,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 258 [2022-11-25 15:47:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:47:05,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118108646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:47:05,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:47:05,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 6] total 27 [2022-11-25 15:47:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521036098] [2022-11-25 15:47:05,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:47:05,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 15:47:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:47:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 15:47:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-11-25 15:47:13,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 311 [2022-11-25 15:47:13,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1699 transitions, 31188 flow. Second operand has 29 states, 29 states have (on average 99.51724137931035) internal successors, (2886), 29 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:47:13,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:13,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 311 [2022-11-25 15:47:13,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:31,252 INFO L130 PetriNetUnfolder]: 8007/13310 cut-off events. [2022-11-25 15:47:31,252 INFO L131 PetriNetUnfolder]: For 263642/263642 co-relation queries the response was YES. [2022-11-25 15:47:31,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103855 conditions, 13310 events. 8007/13310 cut-off events. For 263642/263642 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 95959 event pairs, 649 based on Foata normal form. 136/13222 useless extension candidates. Maximal degree in co-relation 103686. Up to 8863 conditions per place. [2022-11-25 15:47:31,687 INFO L137 encePairwiseOnDemand]: 301/311 looper letters, 1420 selfloop transitions, 609 changer transitions 21/2050 dead transitions. [2022-11-25 15:47:31,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 2050 transitions, 41638 flow [2022-11-25 15:47:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 15:47:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-25 15:47:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5619 transitions. [2022-11-25 15:47:31,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32850043846828414 [2022-11-25 15:47:31,695 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5619 transitions. [2022-11-25 15:47:31,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5619 transitions. [2022-11-25 15:47:31,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:31,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5619 transitions. [2022-11-25 15:47:31,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 102.16363636363636) internal successors, (5619), 55 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:47:31,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 311.0) internal successors, (17416), 56 states have internal predecessors, (17416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:47:31,711 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 311.0) internal successors, (17416), 56 states have internal predecessors, (17416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:47:31,711 INFO L175 Difference]: Start difference. First operand has 614 places, 1699 transitions, 31188 flow. Second operand 55 states and 5619 transitions. [2022-11-25 15:47:31,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 2050 transitions, 41638 flow [2022-11-25 15:47:37,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 2050 transitions, 39980 flow, removed 788 selfloop flow, removed 18 redundant places. [2022-11-25 15:47:37,640 INFO L231 Difference]: Finished difference. Result has 655 places, 1820 transitions, 34088 flow [2022-11-25 15:47:37,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=28974, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=34088, PETRI_PLACES=655, PETRI_TRANSITIONS=1820} [2022-11-25 15:47:37,642 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 625 predicate places. [2022-11-25 15:47:37,642 INFO L495 AbstractCegarLoop]: Abstraction has has 655 places, 1820 transitions, 34088 flow [2022-11-25 15:47:37,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.51724137931035) internal successors, (2886), 29 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:47:37,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:37,643 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:47:37,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:37,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 15:47:37,849 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:47:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1158884968, now seen corresponding path program 11 times [2022-11-25 15:47:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:47:37,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801532818] [2022-11-25 15:47:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:37,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:47:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:39,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:47:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801532818] [2022-11-25 15:47:39,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801532818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:47:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983582921] [2022-11-25 15:47:39,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:47:39,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:47:39,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:47:39,807 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:47:39,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 15:47:39,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:47:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:47:39,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 15:47:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:40,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:47:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:40,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 15:47:40,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:40,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 15:47:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:41,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:47:44,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:47:44,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 121 [2022-11-25 15:47:44,410 INFO L321 Elim1Store]: treesize reduction 68, result has 69.8 percent of original size [2022-11-25 15:47:44,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 795 treesize of output 841 [2022-11-25 15:47:44,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:47:44,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:47:44,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:47:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:47:44,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:47:44,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:47:44,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 563 treesize of output 563 [2022-11-25 15:47:44,626 INFO L321 Elim1Store]: treesize reduction 68, result has 53.7 percent of original size [2022-11-25 15:47:44,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 604 treesize of output 526 [2022-11-25 15:48:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:08,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983582921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:08,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:48:08,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 44 [2022-11-25 15:48:08,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199171880] [2022-11-25 15:48:08,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:08,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 15:48:08,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:08,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 15:48:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1722, Unknown=5, NotChecked=0, Total=2070 [2022-11-25 15:48:13,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 311 [2022-11-25 15:48:13,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 1820 transitions, 34088 flow. Second operand has 46 states, 46 states have (on average 81.17391304347827) internal successors, (3734), 46 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:13,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:13,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 311 [2022-11-25 15:48:13,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:18,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:19,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:20,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:22,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:24,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 15:48:25,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:51,952 INFO L130 PetriNetUnfolder]: 8203/13614 cut-off events. [2022-11-25 15:48:51,952 INFO L131 PetriNetUnfolder]: For 270565/270565 co-relation queries the response was YES. [2022-11-25 15:48:52,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108243 conditions, 13614 events. 8203/13614 cut-off events. For 270565/270565 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 98801 event pairs, 1766 based on Foata normal form. 130/13528 useless extension candidates. Maximal degree in co-relation 108067. Up to 10770 conditions per place. [2022-11-25 15:48:52,456 INFO L137 encePairwiseOnDemand]: 300/311 looper letters, 1654 selfloop transitions, 392 changer transitions 28/2074 dead transitions. [2022-11-25 15:48:52,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 2074 transitions, 41447 flow [2022-11-25 15:48:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 15:48:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-25 15:48:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4861 transitions. [2022-11-25 15:48:52,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.26948663931699746 [2022-11-25 15:48:52,463 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4861 transitions. [2022-11-25 15:48:52,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4861 transitions. [2022-11-25 15:48:52,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:52,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4861 transitions. [2022-11-25 15:48:52,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 83.8103448275862) internal successors, (4861), 58 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:52,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 311.0) internal successors, (18349), 59 states have internal predecessors, (18349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:52,479 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 311.0) internal successors, (18349), 59 states have internal predecessors, (18349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:52,479 INFO L175 Difference]: Start difference. First operand has 655 places, 1820 transitions, 34088 flow. Second operand 58 states and 4861 transitions. [2022-11-25 15:48:52,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 2074 transitions, 41447 flow [2022-11-25 15:48:58,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 2074 transitions, 40495 flow, removed 361 selfloop flow, removed 20 redundant places. [2022-11-25 15:48:58,354 INFO L231 Difference]: Finished difference. Result has 699 places, 1877 transitions, 35918 flow [2022-11-25 15:48:58,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=32611, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=35918, PETRI_PLACES=699, PETRI_TRANSITIONS=1877} [2022-11-25 15:48:58,356 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 669 predicate places. [2022-11-25 15:48:58,356 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 1877 transitions, 35918 flow [2022-11-25 15:48:58,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 81.17391304347827) internal successors, (3734), 46 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:58,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:58,357 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:58,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:58,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:58,557 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1792722512, now seen corresponding path program 10 times [2022-11-25 15:48:58,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:58,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962186413] [2022-11-25 15:48:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:58,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:00,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:00,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962186413] [2022-11-25 15:49:00,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962186413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:00,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196145234] [2022-11-25 15:49:00,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:49:00,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:00,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:00,131 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:00,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 15:49:00,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:49:00,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:00,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 15:49:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:49:01,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:02,368 INFO L321 Elim1Store]: treesize reduction 26, result has 62.3 percent of original size [2022-11-25 15:49:02,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 283 treesize of output 250 [2022-11-25 15:49:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:49:03,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196145234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:03,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:03,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 32 [2022-11-25 15:49:03,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425804956] [2022-11-25 15:49:03,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:03,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 15:49:03,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 15:49:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:49:07,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 311 [2022-11-25 15:49:07,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 1877 transitions, 35918 flow. Second operand has 34 states, 34 states have (on average 105.58823529411765) internal successors, (3590), 34 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:07,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:07,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 311 [2022-11-25 15:49:07,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:26,543 INFO L130 PetriNetUnfolder]: 9297/15436 cut-off events. [2022-11-25 15:49:26,543 INFO L131 PetriNetUnfolder]: For 388306/388306 co-relation queries the response was YES. [2022-11-25 15:49:27,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132787 conditions, 15436 events. 9297/15436 cut-off events. For 388306/388306 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 113133 event pairs, 994 based on Foata normal form. 208/15424 useless extension candidates. Maximal degree in co-relation 132604. Up to 11481 conditions per place. [2022-11-25 15:49:27,116 INFO L137 encePairwiseOnDemand]: 302/311 looper letters, 1659 selfloop transitions, 594 changer transitions 6/2259 dead transitions. [2022-11-25 15:49:27,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 2259 transitions, 50041 flow [2022-11-25 15:49:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 15:49:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-25 15:49:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 6296 transitions. [2022-11-25 15:49:27,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3490409136267879 [2022-11-25 15:49:27,130 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 6296 transitions. [2022-11-25 15:49:27,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 6296 transitions. [2022-11-25 15:49:27,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:27,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 6296 transitions. [2022-11-25 15:49:27,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 108.55172413793103) internal successors, (6296), 58 states have internal predecessors, (6296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:27,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 311.0) internal successors, (18349), 59 states have internal predecessors, (18349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:27,157 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 311.0) internal successors, (18349), 59 states have internal predecessors, (18349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:27,157 INFO L175 Difference]: Start difference. First operand has 699 places, 1877 transitions, 35918 flow. Second operand 58 states and 6296 transitions. [2022-11-25 15:49:27,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 2259 transitions, 50041 flow [2022-11-25 15:49:35,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 2259 transitions, 49321 flow, removed 307 selfloop flow, removed 30 redundant places. [2022-11-25 15:49:35,717 INFO L231 Difference]: Finished difference. Result has 748 places, 2126 transitions, 46039 flow [2022-11-25 15:49:35,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=35294, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=46039, PETRI_PLACES=748, PETRI_TRANSITIONS=2126} [2022-11-25 15:49:35,719 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 718 predicate places. [2022-11-25 15:49:35,719 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 2126 transitions, 46039 flow [2022-11-25 15:49:35,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 105.58823529411765) internal successors, (3590), 34 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:35,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:35,721 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:35,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:35,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:35,921 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:49:35,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash -57545497, now seen corresponding path program 11 times [2022-11-25 15:49:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:35,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447206753] [2022-11-25 15:49:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:35,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:38,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:38,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447206753] [2022-11-25 15:49:38,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447206753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:38,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334001652] [2022-11-25 15:49:38,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:49:38,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:38,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:38,030 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:38,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61eec168-75ab-4b95-a1a5-a3a8881502d3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 15:49:38,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:49:38,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:38,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 15:49:38,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:39,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:41,074 INFO L321 Elim1Store]: treesize reduction 40, result has 57.9 percent of original size [2022-11-25 15:49:41,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 321 treesize of output 282 [2022-11-25 15:49:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:43,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334001652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:43,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:43,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-11-25 15:49:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123162501] [2022-11-25 15:49:43,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:43,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-25 15:49:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:43,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-25 15:49:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 15:49:51,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 311 [2022-11-25 15:49:51,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 2126 transitions, 46039 flow. Second operand has 47 states, 47 states have (on average 98.27659574468085) internal successors, (4619), 47 states have internal predecessors, (4619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:51,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:51,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 311 [2022-11-25 15:49:51,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand