./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:15:35,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:15:35,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:15:35,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:15:35,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:15:35,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:15:35,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:15:35,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:15:35,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:15:35,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:15:35,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:15:35,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:15:35,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:15:35,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:15:35,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:15:35,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:15:35,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:15:35,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:15:35,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:15:35,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:15:35,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:15:35,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:15:35,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:15:35,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:15:35,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:15:35,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:15:35,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:15:35,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:15:35,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:15:35,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:15:35,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:15:35,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:15:35,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:15:35,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:15:35,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:15:35,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:15:35,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:15:35,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:15:35,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:15:35,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:15:35,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:15:35,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 22:15:35,973 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:15:35,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:15:35,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:15:35,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:15:35,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:15:35,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:15:35,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:15:35,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:15:35,976 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:15:35,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:15:35,976 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:15:35,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:15:35,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:15:35,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:15:35,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:15:35,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:15:35,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:15:35,977 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:15:35,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:15:35,977 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:15:35,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:15:35,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:15:35,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:15:35,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:15:35,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:15:35,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:15:35,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:15:35,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:15:35,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:15:35,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:15:35,979 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:15:35,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:15:35,980 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:15:35,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:15:35,980 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:15:35,980 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_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2022-12-13 22:15:36,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:15:36,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:15:36,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:15:36,182 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:15:36,183 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:15:36,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-12-13 22:15:38,773 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:15:38,924 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:15:38,924 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-12-13 22:15:38,929 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/data/7103ba8a5/59ac73357eb84bb89b19ebee9cde53dc/FLAG14f1e841b [2022-12-13 22:15:39,351 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/data/7103ba8a5/59ac73357eb84bb89b19ebee9cde53dc [2022-12-13 22:15:39,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:15:39,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:15:39,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:15:39,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:15:39,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:15:39,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7029e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39, skipping insertion in model container [2022-12-13 22:15:39,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:15:39,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:15:39,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,503 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,503 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,505 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,505 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,511 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_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-12-13 22:15:39,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:15:39,525 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:15:39,534 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,535 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,535 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,536 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,537 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,537 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,538 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,538 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,540 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,540 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:15:39,541 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:15:39,544 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_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-12-13 22:15:39,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:15:39,557 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:15:39,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39 WrapperNode [2022-12-13 22:15:39,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:15:39,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:15:39,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:15:39,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:15:39,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,587 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 166 [2022-12-13 22:15:39,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:15:39,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:15:39,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:15:39,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:15:39,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,606 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:15:39,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:15:39,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:15:39,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:15:39,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (1/1) ... [2022-12-13 22:15:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:15:39,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:15:39,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:15:39,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:15:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:15:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:15:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:15:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:15:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 22:15:39,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 22:15:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 22:15:39,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 22:15:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 22:15:39,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 22:15:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:15:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 22:15:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 22:15:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 22:15:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:15:39,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:15:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:15:39,671 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 22:15:39,758 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:15:39,760 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:15:39,982 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:15:40,035 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:15:40,035 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 22:15:40,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:15:40 BoogieIcfgContainer [2022-12-13 22:15:40,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:15:40,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:15:40,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:15:40,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:15:40,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:15:39" (1/3) ... [2022-12-13 22:15:40,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaf5b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:15:40, skipping insertion in model container [2022-12-13 22:15:40,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:15:39" (2/3) ... [2022-12-13 22:15:40,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaf5b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:15:40, skipping insertion in model container [2022-12-13 22:15:40,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:15:40" (3/3) ... [2022-12-13 22:15:40,044 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2022-12-13 22:15:40,050 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 22:15:40,058 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:15:40,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:15:40,058 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:15:40,109 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 22:15:40,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 156 transitions, 336 flow [2022-12-13 22:15:40,202 INFO L130 PetriNetUnfolder]: 11/153 cut-off events. [2022-12-13 22:15:40,202 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 22:15:40,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 11/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2022-12-13 22:15:40,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 156 transitions, 336 flow [2022-12-13 22:15:40,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 142 transitions, 302 flow [2022-12-13 22:15:40,214 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:15:40,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 142 transitions, 302 flow [2022-12-13 22:15:40,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 142 transitions, 302 flow [2022-12-13 22:15:40,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 142 transitions, 302 flow [2022-12-13 22:15:40,252 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2022-12-13 22:15:40,252 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 22:15:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 11/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2022-12-13 22:15:40,254 INFO L119 LiptonReduction]: Number of co-enabled transitions 1082 [2022-12-13 22:15:44,307 INFO L134 LiptonReduction]: Checked pairs total: 2073 [2022-12-13 22:15:44,307 INFO L136 LiptonReduction]: Total number of compositions: 144 [2022-12-13 22:15:44,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:15:44,322 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;@1067170a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:15:44,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 22:15:44,327 INFO L130 PetriNetUnfolder]: 3/24 cut-off events. [2022-12-13 22:15:44,327 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 22:15:44,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:15:44,327 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:15:44,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:15:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:15:44,331 INFO L85 PathProgramCache]: Analyzing trace with hash 710668801, now seen corresponding path program 1 times [2022-12-13 22:15:44,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:15:44,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330112425] [2022-12-13 22:15:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:15:44,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:15:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:15:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:15:44,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:15:44,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330112425] [2022-12-13 22:15:44,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330112425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:15:44,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:15:44,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:15:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928196396] [2022-12-13 22:15:44,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:15:44,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:15:44,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:15:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:15:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:15:44,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 300 [2022-12-13 22:15:44,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:44,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:15:44,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 300 [2022-12-13 22:15:44,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:15:44,785 INFO L130 PetriNetUnfolder]: 238/394 cut-off events. [2022-12-13 22:15:44,786 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-12-13 22:15:44,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 394 events. 238/394 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1530 event pairs, 14 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 687. Up to 129 conditions per place. [2022-12-13 22:15:44,789 INFO L137 encePairwiseOnDemand]: 295/300 looper letters, 44 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2022-12-13 22:15:44,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 230 flow [2022-12-13 22:15:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:15:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:15:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 721 transitions. [2022-12-13 22:15:44,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4806666666666667 [2022-12-13 22:15:44,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 721 transitions. [2022-12-13 22:15:44,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 721 transitions. [2022-12-13 22:15:44,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:15:44,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 721 transitions. [2022-12-13 22:15:44,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:44,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:44,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:44,816 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 5 states and 721 transitions. [2022-12-13 22:15:44,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 230 flow [2022-12-13 22:15:44,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 22:15:44,821 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 84 flow [2022-12-13 22:15:44,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2022-12-13 22:15:44,826 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2022-12-13 22:15:44,826 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 84 flow [2022-12-13 22:15:44,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:44,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:15:44,827 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:15:44,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:15:44,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:15:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:15:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash -954238005, now seen corresponding path program 2 times [2022-12-13 22:15:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:15:44,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288788500] [2022-12-13 22:15:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:15:44,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:15:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:15:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:15:45,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:15:45,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288788500] [2022-12-13 22:15:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288788500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:15:45,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:15:45,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:15:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256383359] [2022-12-13 22:15:45,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:15:45,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:15:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:15:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:15:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:15:45,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2022-12-13 22:15:45,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:15:45,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2022-12-13 22:15:45,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:15:45,434 INFO L130 PetriNetUnfolder]: 530/812 cut-off events. [2022-12-13 22:15:45,434 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2022-12-13 22:15:45,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 812 events. 530/812 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3294 event pairs, 36 based on Foata normal form. 20/715 useless extension candidates. Maximal degree in co-relation 705. Up to 298 conditions per place. [2022-12-13 22:15:45,438 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2022-12-13 22:15:45,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 300 flow [2022-12-13 22:15:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 22:15:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 22:15:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 974 transitions. [2022-12-13 22:15:45,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4638095238095238 [2022-12-13 22:15:45,441 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 974 transitions. [2022-12-13 22:15:45,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 974 transitions. [2022-12-13 22:15:45,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:15:45,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 974 transitions. [2022-12-13 22:15:45,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,447 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,447 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 84 flow. Second operand 7 states and 974 transitions. [2022-12-13 22:15:45,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 300 flow [2022-12-13 22:15:45,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:15:45,448 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 98 flow [2022-12-13 22:15:45,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2022-12-13 22:15:45,449 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2022-12-13 22:15:45,449 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 98 flow [2022-12-13 22:15:45,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:15:45,450 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:15:45,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:15:45,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:15:45,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:15:45,450 INFO L85 PathProgramCache]: Analyzing trace with hash -879160007, now seen corresponding path program 1 times [2022-12-13 22:15:45,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:15:45,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181731335] [2022-12-13 22:15:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:15:45,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:15:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:15:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:15:45,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:15:45,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181731335] [2022-12-13 22:15:45,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181731335] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:15:45,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:15:45,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:15:45,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099619966] [2022-12-13 22:15:45,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:15:45,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:15:45,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:15:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:15:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:15:45,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 300 [2022-12-13 22:15:45,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 98 flow. Second operand has 3 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) [2022-12-13 22:15:45,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:15:45,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 300 [2022-12-13 22:15:45,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:15:45,644 INFO L130 PetriNetUnfolder]: 205/384 cut-off events. [2022-12-13 22:15:45,644 INFO L131 PetriNetUnfolder]: For 482/482 co-relation queries the response was YES. [2022-12-13 22:15:45,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 384 events. 205/384 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1416 event pairs, 87 based on Foata normal form. 14/354 useless extension candidates. Maximal degree in co-relation 589. Up to 264 conditions per place. [2022-12-13 22:15:45,646 INFO L137 encePairwiseOnDemand]: 297/300 looper letters, 28 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2022-12-13 22:15:45,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 196 flow [2022-12-13 22:15:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:15:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:15:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2022-12-13 22:15:45,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2022-12-13 22:15:45,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2022-12-13 22:15:45,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2022-12-13 22:15:45,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:15:45,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2022-12-13 22:15:45,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,650 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 98 flow. Second operand 3 states and 436 transitions. [2022-12-13 22:15:45,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 196 flow [2022-12-13 22:15:45,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 174 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-12-13 22:15:45,653 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 92 flow [2022-12-13 22:15:45,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2022-12-13 22:15:45,653 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-12-13 22:15:45,653 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 92 flow [2022-12-13 22:15:45,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-12-13 22:15:45,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:15:45,654 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:15:45,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:15:45,654 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:15:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:15:45,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1652267049, now seen corresponding path program 1 times [2022-12-13 22:15:45,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:15:45,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922128147] [2022-12-13 22:15:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:15:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:15:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:15:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:15:45,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:15:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922128147] [2022-12-13 22:15:45,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922128147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:15:45,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:15:45,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:15:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26266961] [2022-12-13 22:15:45,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:15:45,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:15:45,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:15:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:15:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:15:45,769 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 300 [2022-12-13 22:15:45,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:15:45,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 300 [2022-12-13 22:15:45,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:15:45,863 INFO L130 PetriNetUnfolder]: 234/450 cut-off events. [2022-12-13 22:15:45,863 INFO L131 PetriNetUnfolder]: For 291/291 co-relation queries the response was YES. [2022-12-13 22:15:45,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 450 events. 234/450 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1781 event pairs, 187 based on Foata normal form. 10/402 useless extension candidates. Maximal degree in co-relation 746. Up to 330 conditions per place. [2022-12-13 22:15:45,865 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 22 selfloop transitions, 2 changer transitions 12/41 dead transitions. [2022-12-13 22:15:45,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 197 flow [2022-12-13 22:15:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:15:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:15:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2022-12-13 22:15:45,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2022-12-13 22:15:45,867 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2022-12-13 22:15:45,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2022-12-13 22:15:45,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:15:45,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2022-12-13 22:15:45,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,870 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,870 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 92 flow. Second operand 4 states and 572 transitions. [2022-12-13 22:15:45,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 197 flow [2022-12-13 22:15:45,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:15:45,872 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 104 flow [2022-12-13 22:15:45,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2022-12-13 22:15:45,872 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2022-12-13 22:15:45,873 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 104 flow [2022-12-13 22:15:45,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:45,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:15:45,873 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:15:45,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 22:15:45,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:15:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:15:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1074958167, now seen corresponding path program 1 times [2022-12-13 22:15:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:15:45,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723557548] [2022-12-13 22:15:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:15:45,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:15:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:15:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:15:46,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:15:46,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723557548] [2022-12-13 22:15:46,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723557548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:15:46,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700873668] [2022-12-13 22:15:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:15:46,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:15:46,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:15:46,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:15:46,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:15:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:15:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 22:15:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:15:46,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:15:47,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 22:15:47,139 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 [2022-12-13 22:15:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:15:47,269 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 [2022-12-13 22:15:47,359 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 19 treesize of output 7 [2022-12-13 22:15:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:15:47,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:15:48,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:15:48,043 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 65 treesize of output 53 [2022-12-13 22:15:48,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:15:48,061 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 484 treesize of output 464 [2022-12-13 22:15:48,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 266 [2022-12-13 22:15:48,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:15:48,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 404 treesize of output 368 [2022-12-13 22:15:48,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:15:48,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 356 treesize of output 344 [2022-12-13 22:15:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:15:48,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700873668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:15:48,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:15:48,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-12-13 22:15:48,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802327185] [2022-12-13 22:15:48,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:15:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 22:15:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:15:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 22:15:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1034, Unknown=8, NotChecked=0, Total=1190 [2022-12-13 22:15:49,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 300 [2022-12-13 22:15:49,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 104 flow. Second operand has 35 states, 35 states have (on average 81.8) internal successors, (2863), 35 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:15:49,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:15:49,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 300 [2022-12-13 22:15:49,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:15:54,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:15:58,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:16:00,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:16:01,068 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse1 (+ c_~W~0 1))) (and (<= |c_thread2Thread1of1ForFork2_~cond~1#1| 1) (<= 1 |c_thread2Thread1of1ForFork2_~cond~1#1|) (<= c_~v_assert~0 1) (<= c_~d~0 1) (<= 1 c_~v_assert~0) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse0)) .cse1)) (<= 1 c_~W~0) (or (= (mod c_~v_assert~0 256) 0) (not (< 0 |c_thread1Thread1of1ForFork1_~w~0#1|)) (forall ((v_ArrVal_128 (Array Int Int)) (v_ArrVal_129 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128))) (or (not (= (select (select .cse2 c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (< (+ c_~d~0 (select (select (store .cse2 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse0)) .cse1)))) (not (< c_~back~0 c_~n~0)) (not (<= 0 c_~back~0))))) is different from false [2022-12-13 22:16:03,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:16:04,782 INFO L130 PetriNetUnfolder]: 1611/2805 cut-off events. [2022-12-13 22:16:04,782 INFO L131 PetriNetUnfolder]: For 1609/1609 co-relation queries the response was YES. [2022-12-13 22:16:04,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7477 conditions, 2805 events. 1611/2805 cut-off events. For 1609/1609 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15617 event pairs, 64 based on Foata normal form. 49/2626 useless extension candidates. Maximal degree in co-relation 7460. Up to 549 conditions per place. [2022-12-13 22:16:04,790 INFO L137 encePairwiseOnDemand]: 281/300 looper letters, 337 selfloop transitions, 164 changer transitions 83/584 dead transitions. [2022-12-13 22:16:04,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 584 transitions, 2907 flow [2022-12-13 22:16:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-13 22:16:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-12-13 22:16:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 7299 transitions. [2022-12-13 22:16:04,814 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28964285714285715 [2022-12-13 22:16:04,814 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 7299 transitions. [2022-12-13 22:16:04,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 7299 transitions. [2022-12-13 22:16:04,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:16:04,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 7299 transitions. [2022-12-13 22:16:04,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 86.89285714285714) internal successors, (7299), 84 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:04,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 300.0) internal successors, (25500), 85 states have internal predecessors, (25500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:04,875 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 300.0) internal successors, (25500), 85 states have internal predecessors, (25500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:04,875 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 104 flow. Second operand 84 states and 7299 transitions. [2022-12-13 22:16:04,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 584 transitions, 2907 flow [2022-12-13 22:16:04,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 584 transitions, 2879 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-12-13 22:16:04,884 INFO L231 Difference]: Finished difference. Result has 166 places, 202 transitions, 1380 flow [2022-12-13 22:16:04,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=1380, PETRI_PLACES=166, PETRI_TRANSITIONS=202} [2022-12-13 22:16:04,884 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 134 predicate places. [2022-12-13 22:16:04,885 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 202 transitions, 1380 flow [2022-12-13 22:16:04,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 81.8) internal successors, (2863), 35 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:04,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:16:04,886 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:04,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:16:05,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:05,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:16:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1097208237, now seen corresponding path program 2 times [2022-12-13 22:16:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:05,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117729299] [2022-12-13 22:16:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:06,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117729299] [2022-12-13 22:16:06,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117729299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:06,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115006648] [2022-12-13 22:16:06,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:16:06,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:06,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:06,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:06,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:16:06,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:16:06,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 22:16:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:06,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:16:06,349 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 [2022-12-13 22:16:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:16:06,525 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 [2022-12-13 22:16:06,594 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 19 treesize of output 7 [2022-12-13 22:16:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:06,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:06,855 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_177 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_177) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) (+ c_~W~0 1))) is different from false [2022-12-13 22:16:07,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:16:07,108 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 59 treesize of output 47 [2022-12-13 22:16:07,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:16:07,117 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 108 treesize of output 104 [2022-12-13 22:16:07,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-12-13 22:16:07,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:16:07,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 55 treesize of output 55 [2022-12-13 22:16:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:07,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115006648] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:07,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:07,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-12-13 22:16:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381850576] [2022-12-13 22:16:07,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:07,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 22:16:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 22:16:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=881, Unknown=2, NotChecked=60, Total=1056 [2022-12-13 22:16:07,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 300 [2022-12-13 22:16:07,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 202 transitions, 1380 flow. Second operand has 33 states, 33 states have (on average 84.84848484848484) internal successors, (2800), 33 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:07,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:16:07,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 300 [2022-12-13 22:16:07,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:16:15,079 INFO L130 PetriNetUnfolder]: 2339/4115 cut-off events. [2022-12-13 22:16:15,079 INFO L131 PetriNetUnfolder]: For 67376/67376 co-relation queries the response was YES. [2022-12-13 22:16:15,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23022 conditions, 4115 events. 2339/4115 cut-off events. For 67376/67376 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25845 event pairs, 217 based on Foata normal form. 36/4150 useless extension candidates. Maximal degree in co-relation 22671. Up to 1020 conditions per place. [2022-12-13 22:16:15,109 INFO L137 encePairwiseOnDemand]: 284/300 looper letters, 290 selfloop transitions, 285 changer transitions 76/651 dead transitions. [2022-12-13 22:16:15,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 651 transitions, 6894 flow [2022-12-13 22:16:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 22:16:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 22:16:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6058 transitions. [2022-12-13 22:16:15,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29696078431372547 [2022-12-13 22:16:15,119 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6058 transitions. [2022-12-13 22:16:15,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6058 transitions. [2022-12-13 22:16:15,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:16:15,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6058 transitions. [2022-12-13 22:16:15,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 89.08823529411765) internal successors, (6058), 68 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:15,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 300.0) internal successors, (20700), 69 states have internal predecessors, (20700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:15,153 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 300.0) internal successors, (20700), 69 states have internal predecessors, (20700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:15,153 INFO L175 Difference]: Start difference. First operand has 166 places, 202 transitions, 1380 flow. Second operand 68 states and 6058 transitions. [2022-12-13 22:16:15,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 651 transitions, 6894 flow [2022-12-13 22:16:15,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 651 transitions, 6600 flow, removed 145 selfloop flow, removed 6 redundant places. [2022-12-13 22:16:15,264 INFO L231 Difference]: Finished difference. Result has 247 places, 371 transitions, 4598 flow [2022-12-13 22:16:15,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4598, PETRI_PLACES=247, PETRI_TRANSITIONS=371} [2022-12-13 22:16:15,265 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 215 predicate places. [2022-12-13 22:16:15,265 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 371 transitions, 4598 flow [2022-12-13 22:16:15,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 84.84848484848484) internal successors, (2800), 33 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:15,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:16:15,266 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:15,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:16:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:15,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:16:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1084697213, now seen corresponding path program 3 times [2022-12-13 22:16:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659296656] [2022-12-13 22:16:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:16,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659296656] [2022-12-13 22:16:16,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659296656] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:16,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594931684] [2022-12-13 22:16:16,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:16:16,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:16,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:16,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:16,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:16:16,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:16:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 22:16:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:16:16,590 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 [2022-12-13 22:16:16,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:16:16,635 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 [2022-12-13 22:16:16,668 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 23 treesize of output 7 [2022-12-13 22:16:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:16:16,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:16,854 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_223) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) (+ c_~W~0 1))) is different from false [2022-12-13 22:16:16,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:16:16,930 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 96 treesize of output 92 [2022-12-13 22:16:16,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2022-12-13 22:16:16,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-12-13 22:16:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:16:17,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594931684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:17,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:17,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-12-13 22:16:17,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415897286] [2022-12-13 22:16:17,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:17,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 22:16:17,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:17,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 22:16:17,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=871, Unknown=6, NotChecked=60, Total=1056 [2022-12-13 22:16:17,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 300 [2022-12-13 22:16:17,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 371 transitions, 4598 flow. Second operand has 33 states, 33 states have (on average 84.78787878787878) internal successors, (2798), 33 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:17,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:16:17,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 300 [2022-12-13 22:16:17,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:16:20,533 INFO L130 PetriNetUnfolder]: 2310/4108 cut-off events. [2022-12-13 22:16:20,533 INFO L131 PetriNetUnfolder]: For 101441/101441 co-relation queries the response was YES. [2022-12-13 22:16:20,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28335 conditions, 4108 events. 2310/4108 cut-off events. For 101441/101441 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25545 event pairs, 145 based on Foata normal form. 32/4139 useless extension candidates. Maximal degree in co-relation 27628. Up to 1104 conditions per place. [2022-12-13 22:16:20,568 INFO L137 encePairwiseOnDemand]: 286/300 looper letters, 307 selfloop transitions, 298 changer transitions 49/654 dead transitions. [2022-12-13 22:16:20,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 654 transitions, 9345 flow [2022-12-13 22:16:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 22:16:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 22:16:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3495 transitions. [2022-12-13 22:16:20,571 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2987179487179487 [2022-12-13 22:16:20,571 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3495 transitions. [2022-12-13 22:16:20,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3495 transitions. [2022-12-13 22:16:20,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:16:20,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3495 transitions. [2022-12-13 22:16:20,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 89.61538461538461) internal successors, (3495), 39 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:20,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 300.0) internal successors, (12000), 40 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:20,582 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 300.0) internal successors, (12000), 40 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:20,582 INFO L175 Difference]: Start difference. First operand has 247 places, 371 transitions, 4598 flow. Second operand 39 states and 3495 transitions. [2022-12-13 22:16:20,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 654 transitions, 9345 flow [2022-12-13 22:16:20,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 654 transitions, 6995 flow, removed 1130 selfloop flow, removed 14 redundant places. [2022-12-13 22:16:20,955 INFO L231 Difference]: Finished difference. Result has 281 places, 439 transitions, 4807 flow [2022-12-13 22:16:20,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=3188, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4807, PETRI_PLACES=281, PETRI_TRANSITIONS=439} [2022-12-13 22:16:20,956 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 249 predicate places. [2022-12-13 22:16:20,956 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 439 transitions, 4807 flow [2022-12-13 22:16:20,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 84.78787878787878) internal successors, (2798), 33 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:20,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:16:20,957 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:20,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 22:16:21,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:21,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:16:21,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:21,160 INFO L85 PathProgramCache]: Analyzing trace with hash -524436659, now seen corresponding path program 4 times [2022-12-13 22:16:21,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:21,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983143088] [2022-12-13 22:16:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:21,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:16:21,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:21,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983143088] [2022-12-13 22:16:21,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983143088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:21,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513221489] [2022-12-13 22:16:21,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:16:21,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:21,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:21,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:16:21,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:16:21,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:21,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:16:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:16:21,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:16:21,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513221489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:16:21,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:16:21,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-13 22:16:21,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200992332] [2022-12-13 22:16:21,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:16:21,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:16:21,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:21,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:16:21,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:16:21,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 300 [2022-12-13 22:16:21,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 439 transitions, 4807 flow. Second operand has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:21,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:16:21,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 300 [2022-12-13 22:16:21,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:16:22,670 INFO L130 PetriNetUnfolder]: 2689/5470 cut-off events. [2022-12-13 22:16:22,670 INFO L131 PetriNetUnfolder]: For 126088/126229 co-relation queries the response was YES. [2022-12-13 22:16:22,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38769 conditions, 5470 events. 2689/5470 cut-off events. For 126088/126229 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 41876 event pairs, 638 based on Foata normal form. 255/5554 useless extension candidates. Maximal degree in co-relation 38458. Up to 2037 conditions per place. [2022-12-13 22:16:22,715 INFO L137 encePairwiseOnDemand]: 297/300 looper letters, 364 selfloop transitions, 61 changer transitions 80/603 dead transitions. [2022-12-13 22:16:22,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 603 transitions, 7528 flow [2022-12-13 22:16:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:16:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:16:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 602 transitions. [2022-12-13 22:16:22,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016666666666667 [2022-12-13 22:16:22,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 602 transitions. [2022-12-13 22:16:22,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 602 transitions. [2022-12-13 22:16:22,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:16:22,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 602 transitions. [2022-12-13 22:16:22,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:22,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:22,720 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:22,720 INFO L175 Difference]: Start difference. First operand has 281 places, 439 transitions, 4807 flow. Second operand 4 states and 602 transitions. [2022-12-13 22:16:22,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 603 transitions, 7528 flow [2022-12-13 22:16:23,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 603 transitions, 6622 flow, removed 105 selfloop flow, removed 24 redundant places. [2022-12-13 22:16:23,198 INFO L231 Difference]: Finished difference. Result has 262 places, 418 transitions, 4206 flow [2022-12-13 22:16:23,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4206, PETRI_PLACES=262, PETRI_TRANSITIONS=418} [2022-12-13 22:16:23,200 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2022-12-13 22:16:23,200 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 418 transitions, 4206 flow [2022-12-13 22:16:23,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:23,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:16:23,200 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:23,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:16:23,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:23,402 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:16:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:23,403 INFO L85 PathProgramCache]: Analyzing trace with hash 217883583, now seen corresponding path program 5 times [2022-12-13 22:16:23,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:23,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391397634] [2022-12-13 22:16:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:23,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:16:23,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:23,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391397634] [2022-12-13 22:16:23,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391397634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:23,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571180033] [2022-12-13 22:16:23,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:16:23,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:23,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:23,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:23,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:16:23,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 22:16:23,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:23,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:16:23,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:16:23,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 22:16:23,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571180033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:23,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:23,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 22:16:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407562681] [2022-12-13 22:16:23,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 22:16:23,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 22:16:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 22:16:23,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2022-12-13 22:16:23,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 418 transitions, 4206 flow. Second operand has 12 states, 12 states have (on average 133.41666666666666) internal successors, (1601), 12 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:23,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:16:23,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2022-12-13 22:16:23,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:16:24,882 INFO L130 PetriNetUnfolder]: 1536/3258 cut-off events. [2022-12-13 22:16:24,883 INFO L131 PetriNetUnfolder]: For 66662/66890 co-relation queries the response was YES. [2022-12-13 22:16:24,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21881 conditions, 3258 events. 1536/3258 cut-off events. For 66662/66890 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 22558 event pairs, 736 based on Foata normal form. 89/3236 useless extension candidates. Maximal degree in co-relation 21805. Up to 2406 conditions per place. [2022-12-13 22:16:24,920 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 153 selfloop transitions, 3 changer transitions 66/261 dead transitions. [2022-12-13 22:16:24,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 261 transitions, 2980 flow [2022-12-13 22:16:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:16:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:16:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 826 transitions. [2022-12-13 22:16:24,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4588888888888889 [2022-12-13 22:16:24,922 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 826 transitions. [2022-12-13 22:16:24,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 826 transitions. [2022-12-13 22:16:24,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:16:24,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 826 transitions. [2022-12-13 22:16:24,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.66666666666666) internal successors, (826), 6 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:24,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 300.0) internal successors, (2100), 7 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:24,925 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 300.0) internal successors, (2100), 7 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:24,925 INFO L175 Difference]: Start difference. First operand has 262 places, 418 transitions, 4206 flow. Second operand 6 states and 826 transitions. [2022-12-13 22:16:24,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 261 transitions, 2980 flow [2022-12-13 22:16:25,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 261 transitions, 2700 flow, removed 73 selfloop flow, removed 24 redundant places. [2022-12-13 22:16:25,037 INFO L231 Difference]: Finished difference. Result has 203 places, 195 transitions, 1810 flow [2022-12-13 22:16:25,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1810, PETRI_PLACES=203, PETRI_TRANSITIONS=195} [2022-12-13 22:16:25,038 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 171 predicate places. [2022-12-13 22:16:25,038 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 195 transitions, 1810 flow [2022-12-13 22:16:25,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.41666666666666) internal successors, (1601), 12 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:25,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:16:25,039 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:25,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 22:16:25,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:25,241 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:16:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash -563136689, now seen corresponding path program 6 times [2022-12-13 22:16:25,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:25,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893746323] [2022-12-13 22:16:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:26,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:26,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893746323] [2022-12-13 22:16:26,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893746323] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547403056] [2022-12-13 22:16:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:16:26,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:26,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:26,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:16:27,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 22:16:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:27,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 22:16:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:27,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:16:27,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2022-12-13 22:16:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:27,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:28,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:16:28,137 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 51 treesize of output 69 [2022-12-13 22:16:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:28,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547403056] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:28,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:28,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2022-12-13 22:16:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101189525] [2022-12-13 22:16:28,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:28,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 22:16:28,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 22:16:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 22:16:32,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 300 [2022-12-13 22:16:32,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 195 transitions, 1810 flow. Second operand has 45 states, 45 states have (on average 99.75555555555556) internal successors, (4489), 45 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:32,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:16:32,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 300 [2022-12-13 22:16:32,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:16:48,428 INFO L130 PetriNetUnfolder]: 8985/15782 cut-off events. [2022-12-13 22:16:48,428 INFO L131 PetriNetUnfolder]: For 109807/109807 co-relation queries the response was YES. [2022-12-13 22:16:48,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82671 conditions, 15782 events. 8985/15782 cut-off events. For 109807/109807 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 119537 event pairs, 541 based on Foata normal form. 132/15914 useless extension candidates. Maximal degree in co-relation 82613. Up to 3095 conditions per place. [2022-12-13 22:16:48,523 INFO L137 encePairwiseOnDemand]: 284/300 looper letters, 852 selfloop transitions, 941 changer transitions 169/1962 dead transitions. [2022-12-13 22:16:48,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1962 transitions, 19331 flow [2022-12-13 22:16:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-12-13 22:16:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-12-13 22:16:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 17660 transitions. [2022-12-13 22:16:48,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3503968253968254 [2022-12-13 22:16:48,539 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 17660 transitions. [2022-12-13 22:16:48,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 17660 transitions. [2022-12-13 22:16:48,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:16:48,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 17660 transitions. [2022-12-13 22:16:48,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 105.11904761904762) internal successors, (17660), 168 states have internal predecessors, (17660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:48,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 300.0) internal successors, (50700), 169 states have internal predecessors, (50700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:48,588 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 300.0) internal successors, (50700), 169 states have internal predecessors, (50700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:48,588 INFO L175 Difference]: Start difference. First operand has 203 places, 195 transitions, 1810 flow. Second operand 168 states and 17660 transitions. [2022-12-13 22:16:48,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1962 transitions, 19331 flow [2022-12-13 22:16:49,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1962 transitions, 18529 flow, removed 272 selfloop flow, removed 14 redundant places. [2022-12-13 22:16:49,035 INFO L231 Difference]: Finished difference. Result has 368 places, 1089 transitions, 13195 flow [2022-12-13 22:16:49,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=13195, PETRI_PLACES=368, PETRI_TRANSITIONS=1089} [2022-12-13 22:16:49,036 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 336 predicate places. [2022-12-13 22:16:49,036 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 1089 transitions, 13195 flow [2022-12-13 22:16:49,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 99.75555555555556) internal successors, (4489), 45 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:49,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:16:49,037 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:49,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:16:49,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 22:16:49,238 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:16:49,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:49,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1757871685, now seen corresponding path program 7 times [2022-12-13 22:16:49,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:49,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363099284] [2022-12-13 22:16:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:49,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:50,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363099284] [2022-12-13 22:16:50,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363099284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:50,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087188840] [2022-12-13 22:16:50,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:16:50,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:50,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:50,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:50,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:16:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:50,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 22:16:50,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:50,311 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 16 treesize of output 12 [2022-12-13 22:16:50,349 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 [2022-12-13 22:16:50,407 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 [2022-12-13 22:16:50,455 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 [2022-12-13 22:16:50,492 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 [2022-12-13 22:16:50,889 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-12-13 22:16:50,889 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 47 treesize of output 16 [2022-12-13 22:16:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:51,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:52,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:16:52,182 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 164 treesize of output 109 [2022-12-13 22:16:52,228 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 22:16:52,229 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 4450 treesize of output 4238 [2022-12-13 22:16:52,284 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 22:16:52,284 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 4186 treesize of output 4038 [2022-12-13 22:16:52,354 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 22:16:52,355 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 3986 treesize of output 3238 [2022-12-13 22:16:52,418 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 22:16:52,419 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 3186 treesize of output 2838 [2022-12-13 22:16:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:59,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087188840] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:59,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:59,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 47 [2022-12-13 22:16:59,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806528211] [2022-12-13 22:16:59,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:59,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 22:16:59,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:59,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 22:16:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1982, Unknown=6, NotChecked=0, Total=2256 [2022-12-13 22:17:00,452 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 300 [2022-12-13 22:17:00,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 1089 transitions, 13195 flow. Second operand has 48 states, 48 states have (on average 81.70833333333333) internal successors, (3922), 48 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:17:00,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:17:00,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 300 [2022-12-13 22:17:00,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:17:05,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:17:10,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:17:13,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:17:16,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:17:19,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:17:31,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:17:44,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:17:48,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:18:10,826 WARN L233 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 118 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:18:14,164 INFO L130 PetriNetUnfolder]: 14955/26732 cut-off events. [2022-12-13 22:18:14,164 INFO L131 PetriNetUnfolder]: For 601736/601736 co-relation queries the response was YES. [2022-12-13 22:18:14,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184246 conditions, 26732 events. 14955/26732 cut-off events. For 601736/601736 co-relation queries the response was YES. Maximal size of possible extension queue 1035. Compared 221680 event pairs, 1296 based on Foata normal form. 516/27248 useless extension candidates. Maximal degree in co-relation 184151. Up to 5058 conditions per place. [2022-12-13 22:18:14,493 INFO L137 encePairwiseOnDemand]: 284/300 looper letters, 1050 selfloop transitions, 1411 changer transitions 293/2754 dead transitions. [2022-12-13 22:18:14,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 2754 transitions, 37368 flow [2022-12-13 22:18:14,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-12-13 22:18:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2022-12-13 22:18:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 12997 transitions. [2022-12-13 22:18:14,514 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29076062639821026 [2022-12-13 22:18:14,514 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 12997 transitions. [2022-12-13 22:18:14,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 12997 transitions. [2022-12-13 22:18:14,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:18:14,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 12997 transitions. [2022-12-13 22:18:14,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 87.22818791946308) internal successors, (12997), 149 states have internal predecessors, (12997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:18:14,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 300.0) internal successors, (45000), 150 states have internal predecessors, (45000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:18:14,570 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 300.0) internal successors, (45000), 150 states have internal predecessors, (45000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:18:14,570 INFO L175 Difference]: Start difference. First operand has 368 places, 1089 transitions, 13195 flow. Second operand 149 states and 12997 transitions. [2022-12-13 22:18:14,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 2754 transitions, 37368 flow [2022-12-13 22:18:22,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 2754 transitions, 33252 flow, removed 1168 selfloop flow, removed 22 redundant places. [2022-12-13 22:18:22,391 INFO L231 Difference]: Finished difference. Result has 548 places, 1738 transitions, 23885 flow [2022-12-13 22:18:22,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=10365, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=23885, PETRI_PLACES=548, PETRI_TRANSITIONS=1738} [2022-12-13 22:18:22,392 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 516 predicate places. [2022-12-13 22:18:22,392 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 1738 transitions, 23885 flow [2022-12-13 22:18:22,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 81.70833333333333) internal successors, (3922), 48 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:18:22,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:18:22,393 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:18:22,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 22:18:22,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:18:22,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:18:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:18:22,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1229662669, now seen corresponding path program 8 times [2022-12-13 22:18:22,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:18:22,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118080970] [2022-12-13 22:18:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:18:22,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:18:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:18:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:18:23,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:18:23,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118080970] [2022-12-13 22:18:23,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118080970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:18:23,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982622956] [2022-12-13 22:18:23,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:18:23,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:18:23,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:18:23,434 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:18:23,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:18:23,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:18:23,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:18:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 22:18:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:18:23,634 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 [2022-12-13 22:18:23,674 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 [2022-12-13 22:18:23,729 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 [2022-12-13 22:18:23,780 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 [2022-12-13 22:18:24,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:18:24,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2022-12-13 22:18:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:18:24,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:18:25,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:18:25,167 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 133 treesize of output 97 [2022-12-13 22:18:25,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:18:25,194 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 538 treesize of output 556 [2022-12-13 22:18:25,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:18:25,220 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 504 treesize of output 452 [2022-12-13 22:18:25,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:18:25,247 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 400 treesize of output 400 [2022-12-13 22:18:25,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:18:25,274 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 289 treesize of output 315 [2022-12-13 22:18:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:18:32,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982622956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:18:32,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:18:32,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 47 [2022-12-13 22:18:32,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207110648] [2022-12-13 22:18:32,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:18:32,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 22:18:32,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:18:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 22:18:32,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1955, Unknown=6, NotChecked=0, Total=2256 [2022-12-13 22:18:34,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 300 [2022-12-13 22:18:34,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1738 transitions, 23885 flow. Second operand has 48 states, 48 states have (on average 81.70833333333333) internal successors, (3922), 48 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:18:34,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:18:34,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 300 [2022-12-13 22:18:34,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:18:37,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:18:44,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:19:15,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:19:38,148 INFO L130 PetriNetUnfolder]: 22460/39797 cut-off events. [2022-12-13 22:19:38,148 INFO L131 PetriNetUnfolder]: For 2062839/2062839 co-relation queries the response was YES. [2022-12-13 22:19:38,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330640 conditions, 39797 events. 22460/39797 cut-off events. For 2062839/2062839 co-relation queries the response was YES. Maximal size of possible extension queue 1471. Compared 347192 event pairs, 1798 based on Foata normal form. 425/40222 useless extension candidates. Maximal degree in co-relation 330494. Up to 8331 conditions per place. [2022-12-13 22:19:38,865 INFO L137 encePairwiseOnDemand]: 283/300 looper letters, 1272 selfloop transitions, 2218 changer transitions 392/3882 dead transitions. [2022-12-13 22:19:38,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 3882 transitions, 61468 flow [2022-12-13 22:19:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-13 22:19:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2022-12-13 22:19:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 17523 transitions. [2022-12-13 22:19:38,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28915841584158414 [2022-12-13 22:19:38,882 INFO L72 ComplementDD]: Start complementDD. Operand 202 states and 17523 transitions. [2022-12-13 22:19:38,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 202 states and 17523 transitions. [2022-12-13 22:19:38,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:19:38,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 202 states and 17523 transitions. [2022-12-13 22:19:38,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 203 states, 202 states have (on average 86.74752475247524) internal successors, (17523), 202 states have internal predecessors, (17523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:19:38,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 203 states, 203 states have (on average 300.0) internal successors, (60900), 203 states have internal predecessors, (60900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:19:38,939 INFO L81 ComplementDD]: Finished complementDD. Result has 203 states, 203 states have (on average 300.0) internal successors, (60900), 203 states have internal predecessors, (60900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:19:38,939 INFO L175 Difference]: Start difference. First operand has 548 places, 1738 transitions, 23885 flow. Second operand 202 states and 17523 transitions. [2022-12-13 22:19:38,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 3882 transitions, 61468 flow [2022-12-13 22:20:03,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 3882 transitions, 56365 flow, removed 1802 selfloop flow, removed 43 redundant places. [2022-12-13 22:20:03,699 INFO L231 Difference]: Finished difference. Result has 745 places, 2610 transitions, 42471 flow [2022-12-13 22:20:03,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=17534, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=202, PETRI_FLOW=42471, PETRI_PLACES=745, PETRI_TRANSITIONS=2610} [2022-12-13 22:20:03,700 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 713 predicate places. [2022-12-13 22:20:03,700 INFO L495 AbstractCegarLoop]: Abstraction has has 745 places, 2610 transitions, 42471 flow [2022-12-13 22:20:03,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 81.70833333333333) internal successors, (3922), 48 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:20:03,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:20:03,701 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:20:03,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 22:20:03,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:03,902 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:20:03,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:20:03,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1022214691, now seen corresponding path program 9 times [2022-12-13 22:20:03,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:20:03,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058739070] [2022-12-13 22:20:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:20:03,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:20:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:20:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:20:04,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:20:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058739070] [2022-12-13 22:20:04,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058739070] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:20:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508470450] [2022-12-13 22:20:04,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:20:04,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:20:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:20:04,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:20:04,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:20:04,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:20:04,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:20:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 22:20:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:20:05,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:20:05,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2022-12-13 22:20:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:20:05,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:20:06,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:20:06,203 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 51 treesize of output 69 [2022-12-13 22:20:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:20:06,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508470450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:20:06,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:20:06,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2022-12-13 22:20:06,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034769510] [2022-12-13 22:20:06,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:20:06,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 22:20:06,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:20:06,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 22:20:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 22:20:08,773 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 300 [2022-12-13 22:20:08,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 745 places, 2610 transitions, 42471 flow. Second operand has 42 states, 42 states have (on average 106.95238095238095) internal successors, (4492), 42 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:20:08,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:20:08,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 300 [2022-12-13 22:20:08,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:21:09,546 INFO L130 PetriNetUnfolder]: 33367/58779 cut-off events. [2022-12-13 22:21:09,546 INFO L131 PetriNetUnfolder]: For 4255870/4255870 co-relation queries the response was YES. [2022-12-13 22:21:10,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573816 conditions, 58779 events. 33367/58779 cut-off events. For 4255870/4255870 co-relation queries the response was YES. Maximal size of possible extension queue 2378. Compared 541802 event pairs, 1993 based on Foata normal form. 488/59267 useless extension candidates. Maximal degree in co-relation 573631. Up to 12479 conditions per place. [2022-12-13 22:21:11,055 INFO L137 encePairwiseOnDemand]: 283/300 looper letters, 1274 selfloop transitions, 3496 changer transitions 505/5275 dead transitions. [2022-12-13 22:21:11,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 935 places, 5275 transitions, 97832 flow [2022-12-13 22:21:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-12-13 22:21:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2022-12-13 22:21:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 24212 transitions. [2022-12-13 22:21:11,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3719201228878648 [2022-12-13 22:21:11,073 INFO L72 ComplementDD]: Start complementDD. Operand 217 states and 24212 transitions. [2022-12-13 22:21:11,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 217 states and 24212 transitions. [2022-12-13 22:21:11,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:21:11,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 217 states and 24212 transitions. [2022-12-13 22:21:11,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 218 states, 217 states have (on average 111.57603686635944) internal successors, (24212), 217 states have internal predecessors, (24212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:11,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 218 states, 218 states have (on average 300.0) internal successors, (65400), 218 states have internal predecessors, (65400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:11,133 INFO L81 ComplementDD]: Finished complementDD. Result has 218 states, 218 states have (on average 300.0) internal successors, (65400), 218 states have internal predecessors, (65400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:11,133 INFO L175 Difference]: Start difference. First operand has 745 places, 2610 transitions, 42471 flow. Second operand 217 states and 24212 transitions. [2022-12-13 22:21:11,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 935 places, 5275 transitions, 97832 flow [2022-12-13 22:22:21,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 887 places, 5275 transitions, 87692 flow, removed 3444 selfloop flow, removed 48 redundant places. [2022-12-13 22:22:21,916 INFO L231 Difference]: Finished difference. Result has 936 places, 3863 transitions, 69415 flow [2022-12-13 22:22:21,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=38112, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=217, PETRI_FLOW=69415, PETRI_PLACES=936, PETRI_TRANSITIONS=3863} [2022-12-13 22:22:21,918 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 904 predicate places. [2022-12-13 22:22:21,918 INFO L495 AbstractCegarLoop]: Abstraction has has 936 places, 3863 transitions, 69415 flow [2022-12-13 22:22:21,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 106.95238095238095) internal successors, (4492), 42 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:21,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:21,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:22:21,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 22:22:22,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:22,119 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:22:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1979624597, now seen corresponding path program 10 times [2022-12-13 22:22:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742222825] [2022-12-13 22:22:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:22,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:23,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:23,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742222825] [2022-12-13 22:22:23,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742222825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:23,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448632958] [2022-12-13 22:22:23,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:22:23,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:23,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:23,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:23,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:22:23,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:22:23,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:22:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 22:22:23,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:23,356 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 [2022-12-13 22:22:23,404 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 [2022-12-13 22:22:23,466 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 [2022-12-13 22:22:23,529 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 [2022-12-13 22:22:23,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:22:23,878 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 29 treesize of output 29 [2022-12-13 22:22:24,237 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-12-13 22:22:24,237 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 47 treesize of output 16 [2022-12-13 22:22:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:24,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:24,630 WARN L837 $PredicateComparison]: unable to prove that (or (= (mod c_~v_assert~0 256) 0) (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (+ c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1 4)) (select .cse0 (+ c_~queue~0.offset .cse1)))) (+ c_~W~0 1)))) is different from false [2022-12-13 22:22:25,507 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-12-13 22:22:25,507 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 154 treesize of output 111 [2022-12-13 22:22:25,596 INFO L321 Elim1Store]: treesize reduction 12, result has 89.6 percent of original size [2022-12-13 22:22:25,596 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 1099 treesize of output 1109 [2022-12-13 22:22:25,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 866 treesize of output 658 [2022-12-13 22:22:25,665 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 22:22:25,665 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 786 treesize of output 710 [2022-12-13 22:22:25,725 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 22:22:25,725 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 408 treesize of output 396 [2022-12-13 22:22:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:30,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448632958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:30,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:30,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 48 [2022-12-13 22:22:30,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670456008] [2022-12-13 22:22:30,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:30,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 22:22:30,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 22:22:30,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1999, Unknown=5, NotChecked=92, Total=2352 [2022-12-13 22:22:30,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 300 [2022-12-13 22:22:30,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 936 places, 3863 transitions, 69415 flow. Second operand has 49 states, 49 states have (on average 81.61224489795919) internal successors, (3999), 49 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:30,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:30,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 300 [2022-12-13 22:22:30,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:52,479 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (* c_~front~0 4))) (let ((.cse1 (select |c_#memory_int| c_~queue~0.base)) (.cse4 (+ c_~queue~0.offset .cse11 4)) (.cse5 (+ c_~queue~0.offset .cse11))) (let ((.cse0 (+ c_~back~0 1)) (.cse2 (= (mod c_~v_assert~0 256) 0)) (.cse9 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base))) (+ c_~d~0 (select .cse10 .cse4) (select .cse10 .cse5))) (+ c_~W~0 1)))) (.cse6 (not (= (select .cse1 (+ c_~queue~0.offset (* c_~back~0 4))) 1))) (.cse7 (not (<= 0 c_~back~0)))) (and (<= |c_thread2Thread1of1ForFork2_~cond~1#1| 1) (or (forall ((v_~back~0_99 Int)) (or (not (<= .cse0 v_~back~0_99)) (not (< v_~back~0_99 c_~n~0)) (not (= (select .cse1 (+ c_~queue~0.offset (* 4 v_~back~0_99))) 1)))) .cse2 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base))) (+ c_~d~0 (select .cse3 .cse4) (select .cse3 .cse5))) 3)) .cse6 .cse7) (<= 1 |c_thread2Thread1of1ForFork2_~cond~1#1|) (<= c_~v_assert~0 1) (or .cse2 (let ((.cse8 (< c_~n~0 (+ c_~back~0 2)))) (and (or .cse8 (and (< c_~d~0 1) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))) (or (< c_~front~0 .cse0) .cse8) (or (< c_~n~0 (+ 3 c_~front~0)) .cse8))) .cse7 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (or .cse2 .cse9) (or .cse2 .cse9 (not (< c_~back~0 c_~n~0)) .cse6 .cse7) (<= c_~d~0 c_~W~0) (<= 1 c_~v_assert~0))))) is different from false [2022-12-13 22:22:55,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:07,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:11,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:14,378 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (= (mod c_~v_assert~0 256) 0)) (.cse1 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base)) (.cse3 (* c_~front~0 4))) (+ c_~d~0 (select .cse2 (+ c_~queue~0.offset .cse3 4)) (select .cse2 (+ c_~queue~0.offset .cse3)))) (+ c_~W~0 1))))) (and (or .cse0 .cse1) (or .cse0 .cse1 (not (< c_~back~0 c_~n~0)) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (not (<= 0 c_~back~0))))) is different from false [2022-12-13 22:23:17,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:23,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:29,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:34,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:39,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:42,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:42,287 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~v_assert~0 256))) (let ((.cse1 (= .cse0 0)) (.cse2 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base)) (.cse4 (* c_~front~0 4))) (+ c_~d~0 (select .cse3 (+ c_~queue~0.offset .cse4 4)) (select .cse3 (+ c_~queue~0.offset .cse4)))) (+ c_~W~0 1))))) (and (not (<= .cse0 0)) (or .cse1 .cse2) (or .cse1 .cse2 (not (< c_~back~0 c_~n~0)) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (not (<= 0 c_~back~0)))))) is different from false [2022-12-13 22:23:47,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:53,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:55,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:23:55,753 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (* c_~front~0 4))) (let ((.cse1 (select |c_#memory_int| c_~queue~0.base)) (.cse4 (+ c_~queue~0.offset .cse11 4)) (.cse5 (+ c_~queue~0.offset .cse11))) (let ((.cse0 (+ c_~back~0 1)) (.cse2 (= (mod c_~v_assert~0 256) 0)) (.cse9 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base))) (+ c_~d~0 (select .cse10 .cse4) (select .cse10 .cse5))) (+ c_~W~0 1)))) (.cse6 (not (= (select .cse1 (+ c_~queue~0.offset (* c_~back~0 4))) 1))) (.cse7 (not (<= 0 c_~back~0)))) (and (<= |c_thread2Thread1of1ForFork2_~cond~1#1| 1) (or (forall ((v_~back~0_99 Int)) (or (not (<= .cse0 v_~back~0_99)) (not (< v_~back~0_99 c_~n~0)) (not (= (select .cse1 (+ c_~queue~0.offset (* 4 v_~back~0_99))) 1)))) .cse2 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base))) (+ c_~d~0 (select .cse3 .cse4) (select .cse3 .cse5))) 3)) .cse6 .cse7) (<= |c_thread2Thread1of1ForFork2_~temp~0#1| 1) (<= 1 |c_thread2Thread1of1ForFork2_~cond~1#1|) (<= c_~v_assert~0 1) (or .cse2 (let ((.cse8 (< c_~n~0 (+ c_~back~0 2)))) (and (or .cse8 (and (< c_~d~0 1) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))) (or (< c_~front~0 .cse0) .cse8) (or (< c_~n~0 (+ 3 c_~front~0)) .cse8))) .cse7 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= c_~d~0 1) (or .cse2 .cse9) (<= 2 c_~W~0) (or .cse2 .cse9 (not (< c_~back~0 c_~n~0)) .cse6 .cse7) (<= 1 c_~v_assert~0) (= |c_thread2Thread1of1ForFork2_~temp~0#1| 1) (<= (+ c_~d~0 1) c_~W~0))))) is different from false [2022-12-13 22:23:58,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:24:00,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:24:00,684 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (* c_~front~0 4))) (let ((.cse1 (select |c_#memory_int| c_~queue~0.base)) (.cse4 (+ c_~queue~0.offset .cse11 4)) (.cse5 (+ c_~queue~0.offset .cse11))) (let ((.cse0 (+ c_~back~0 1)) (.cse2 (= (mod c_~v_assert~0 256) 0)) (.cse9 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base))) (+ c_~d~0 (select .cse10 .cse4) (select .cse10 .cse5))) (+ c_~W~0 1)))) (.cse6 (not (= (select .cse1 (+ c_~queue~0.offset (* c_~back~0 4))) 1))) (.cse7 (not (<= 0 c_~back~0)))) (and (<= |c_thread2Thread1of1ForFork2_~cond~1#1| 1) (or (forall ((v_~back~0_99 Int)) (or (not (<= .cse0 v_~back~0_99)) (not (< v_~back~0_99 c_~n~0)) (not (= (select .cse1 (+ c_~queue~0.offset (* 4 v_~back~0_99))) 1)))) .cse2 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base))) (+ c_~d~0 (select .cse3 .cse4) (select .cse3 .cse5))) 3)) .cse6 .cse7) (<= |c_thread2Thread1of1ForFork2_~temp~0#1| 1) (<= 1 |c_thread2Thread1of1ForFork2_~cond~1#1|) (<= c_~v_assert~0 1) (or .cse2 (let ((.cse8 (< c_~n~0 (+ c_~back~0 2)))) (and (or .cse8 (and (< c_~d~0 1) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))) (or (< c_~front~0 .cse0) .cse8) (or (< c_~n~0 (+ 3 c_~front~0)) .cse8))) .cse7 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= c_~d~0 1) (or .cse2 .cse9) (<= 2 c_~W~0) (or .cse2 .cse9 (not (< c_~back~0 c_~n~0)) .cse6 .cse7) (= c_~queue~0.offset 0) (<= 1 c_~v_assert~0) (= (select .cse1 .cse5) 1) (= |c_thread2Thread1of1ForFork2_~temp~0#1| 1) (<= (+ c_~d~0 1) c_~W~0))))) is different from false [2022-12-13 22:24:25,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:24:25,715 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~v_assert~0 256))) (let ((.cse1 (= .cse0 0)) (.cse2 (forall ((v_ArrVal_570 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_570) c_~queue~0.base)) (.cse4 (* c_~front~0 4))) (+ c_~d~0 (select .cse3 (+ c_~queue~0.offset .cse4 4)) (select .cse3 (+ c_~queue~0.offset .cse4)))) (+ c_~W~0 1))))) (and (not (<= .cse0 0)) (or .cse1 .cse2) (or .cse1 .cse2 (not (< c_~back~0 c_~n~0)) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (not (<= 0 c_~back~0))) (not (<= (mod |c_thread2Thread1of1ForFork2_~cond~1#1| 256) 0))))) is different from false [2022-12-13 22:24:52,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:24:54,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:25:21,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:25:32,783 INFO L130 PetriNetUnfolder]: 53487/93218 cut-off events. [2022-12-13 22:25:32,783 INFO L131 PetriNetUnfolder]: For 10276081/10276081 co-relation queries the response was YES. [2022-12-13 22:25:35,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053705 conditions, 93218 events. 53487/93218 cut-off events. For 10276081/10276081 co-relation queries the response was YES. Maximal size of possible extension queue 3113. Compared 878254 event pairs, 6812 based on Foata normal form. 571/93789 useless extension candidates. Maximal degree in co-relation 1053492. Up to 28113 conditions per place. [2022-12-13 22:25:35,718 INFO L137 encePairwiseOnDemand]: 282/300 looper letters, 3041 selfloop transitions, 5140 changer transitions 504/8685 dead transitions. [2022-12-13 22:25:35,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1129 places, 8685 transitions, 177324 flow [2022-12-13 22:25:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-12-13 22:25:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2022-12-13 22:25:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 17217 transitions. [2022-12-13 22:25:35,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2928061224489796 [2022-12-13 22:25:35,733 INFO L72 ComplementDD]: Start complementDD. Operand 196 states and 17217 transitions. [2022-12-13 22:25:35,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 196 states and 17217 transitions. [2022-12-13 22:25:35,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:35,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 196 states and 17217 transitions. [2022-12-13 22:25:35,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 197 states, 196 states have (on average 87.84183673469387) internal successors, (17217), 196 states have internal predecessors, (17217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 197 states, 197 states have (on average 300.0) internal successors, (59100), 197 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,787 INFO L81 ComplementDD]: Finished complementDD. Result has 197 states, 197 states have (on average 300.0) internal successors, (59100), 197 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,787 INFO L175 Difference]: Start difference. First operand has 936 places, 3863 transitions, 69415 flow. Second operand 196 states and 17217 transitions. [2022-12-13 22:25:35,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1129 places, 8685 transitions, 177324 flow [2022-12-13 22:29:05,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1049 places, 8685 transitions, 165419 flow, removed 3392 selfloop flow, removed 80 redundant places. [2022-12-13 22:29:05,572 INFO L231 Difference]: Finished difference. Result has 1143 places, 7045 transitions, 143404 flow [2022-12-13 22:29:05,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=62526, PETRI_DIFFERENCE_MINUEND_PLACES=854, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=196, PETRI_FLOW=143404, PETRI_PLACES=1143, PETRI_TRANSITIONS=7045} [2022-12-13 22:29:05,575 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 1111 predicate places. [2022-12-13 22:29:05,575 INFO L495 AbstractCegarLoop]: Abstraction has has 1143 places, 7045 transitions, 143404 flow [2022-12-13 22:29:05,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 81.61224489795919) internal successors, (3999), 49 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:05,575 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:05,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 22:29:05,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:29:05,776 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 22:29:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1592209053, now seen corresponding path program 11 times [2022-12-13 22:29:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:05,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896882594] [2022-12-13 22:29:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:05,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:29:07,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896882594] [2022-12-13 22:29:07,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896882594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:29:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033941821] [2022-12-13 22:29:07,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:29:07,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:29:07,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:29:07,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:29:07,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08cf0cc0-3668-4b1e-b9c3-fe8119ffdf6d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 22:29:07,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 22:29:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:29:07,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 22:29:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:29:07,265 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 [2022-12-13 22:29:07,341 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 [2022-12-13 22:29:07,416 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 [2022-12-13 22:29:08,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:29:08,075 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 42 treesize of output 40 [2022-12-13 22:29:08,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:29:08,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:29:08,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:29:08,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:29:08,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:29:08,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 41 treesize of output 19 [2022-12-13 22:29:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:29:08,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:29:09,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:29:09,773 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 [2022-12-13 22:29:09,829 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 22:29:09,830 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 2042 treesize of output 1863 [2022-12-13 22:29:09,897 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 22:29:09,897 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 1825 treesize of output 1533 [2022-12-13 22:29:09,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1390 treesize of output 1166 [2022-12-13 22:29:09,974 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 22:29:09,975 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 1271 treesize of output 1144 [2022-12-13 22:29:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:29:13,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033941821] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:29:13,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:29:13,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-12-13 22:29:13,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417325772] [2022-12-13 22:29:13,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:29:13,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 22:29:13,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:13,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 22:29:13,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2152, Unknown=9, NotChecked=0, Total=2450 [2022-12-13 22:29:14,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 300 [2022-12-13 22:29:14,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1143 places, 7045 transitions, 143404 flow. Second operand has 50 states, 50 states have (on average 81.66) internal successors, (4083), 50 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:14,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:14,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 300 [2022-12-13 22:29:14,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand