./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i --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_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- 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 [2022-12-14 07:47:18,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:47:18,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:47:18,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:47:18,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:47:18,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:47:18,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:47:18,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:47:18,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:47:18,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:47:18,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:47:18,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:47:18,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:47:18,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:47:18,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:47:18,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:47:18,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:47:18,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:47:18,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:47:18,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:47:18,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:47:18,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:47:18,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:47:18,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:47:18,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:47:18,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:47:18,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:47:18,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:47:18,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:47:18,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:47:18,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:47:18,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:47:18,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:47:18,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:47:18,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:47:18,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:47:18,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:47:18,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:47:18,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:47:18,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:47:18,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:47:18,583 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:47:18,602 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:47:18,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:47:18,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:47:18,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:47:18,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:47:18,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:47:18,604 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:47:18,604 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:47:18,604 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:47:18,604 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:47:18,604 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:47:18,604 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:47:18,605 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:47:18,605 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:47:18,605 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:47:18,605 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:47:18,605 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:47:18,605 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:47:18,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:47:18,606 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:47:18,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:47:18,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:47:18,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:47:18,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:47:18,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:47:18,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:47:18,607 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:47:18,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:47:18,607 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:47:18,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:47:18,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:47:18,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:47:18,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:47:18,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:47:18,608 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:47:18,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:47:18,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:47:18,609 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:47:18,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:47:18,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:47:18,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:47:18,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2022-12-14 07:47:18,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:47:18,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:47:18,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:47:18,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:47:18,842 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:47:18,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-12-14 07:47:21,374 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:47:21,549 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:47:21,549 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-12-14 07:47:21,559 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/data/f59f2e0d0/5c9c5245df3f4878a73d09849976b22c/FLAGa388bba49 [2022-12-14 07:47:21,571 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/data/f59f2e0d0/5c9c5245df3f4878a73d09849976b22c [2022-12-14 07:47:21,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:47:21,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:47:21,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:47:21,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:47:21,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:47:21,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:21,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51aebccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21, skipping insertion in model container [2022-12-14 07:47:21,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:21,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:47:21,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:47:21,787 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 07:47:21,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:21,906 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:21,907 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_5a57056d-9065-4c1a-91e8-97cd094bc5cc/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-12-14 07:47:21,911 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:21,913 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:21,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:47:21,925 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:47:21,938 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 07:47:21,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:21,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:21,965 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_5a57056d-9065-4c1a-91e8-97cd094bc5cc/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-12-14 07:47:21,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:21,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:21,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:47:21,995 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:47:21,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21 WrapperNode [2022-12-14 07:47:21,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:47:21,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:47:21,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:47:21,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:47:22,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,038 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2022-12-14 07:47:22,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:47:22,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:47:22,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:47:22,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:47:22,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,063 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:47:22,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:47:22,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:47:22,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:47:22,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (1/1) ... [2022-12-14 07:47:22,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:47:22,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:22,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:47:22,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:47:22,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-14 07:47:22,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 07:47:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:47:22,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:47:22,127 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 07:47:22,243 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:47:22,246 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:47:22,392 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:47:22,452 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:47:22,453 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:47:22,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:22 BoogieIcfgContainer [2022-12-14 07:47:22,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:47:22,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:47:22,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:47:22,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:47:22,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:47:21" (1/3) ... [2022-12-14 07:47:22,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156900b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:22, skipping insertion in model container [2022-12-14 07:47:22,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:21" (2/3) ... [2022-12-14 07:47:22,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156900b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:22, skipping insertion in model container [2022-12-14 07:47:22,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:22" (3/3) ... [2022-12-14 07:47:22,460 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2022-12-14 07:47:22,466 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 07:47:22,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:47:22,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 07:47:22,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:47:22,505 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:47:22,527 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:47:22,538 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 75 transitions, 155 flow [2022-12-14 07:47:22,540 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 75 transitions, 155 flow [2022-12-14 07:47:22,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 75 transitions, 155 flow [2022-12-14 07:47:22,574 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2022-12-14 07:47:22,574 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 07:47:22,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 8/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-12-14 07:47:22,579 INFO L119 LiptonReduction]: Number of co-enabled transitions 1394 [2022-12-14 07:47:23,636 INFO L134 LiptonReduction]: Checked pairs total: 4363 [2022-12-14 07:47:23,636 INFO L136 LiptonReduction]: Total number of compositions: 65 [2022-12-14 07:47:23,648 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 29 transitions, 63 flow [2022-12-14 07:47:23,665 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 128 states, 122 states have (on average 2.2540983606557377) internal successors, (275), 127 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:23,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:47:23,690 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=FINITE_AUTOMATA, 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;@1da22779, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:47:23,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 07:47:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 122 states have (on average 2.2540983606557377) internal successors, (275), 127 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:47:23,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:23,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:47:23,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 07:47:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:23,702 INFO L85 PathProgramCache]: Analyzing trace with hash 372834370, now seen corresponding path program 1 times [2022-12-14 07:47:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:23,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089284648] [2022-12-14 07:47:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:23,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:23,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089284648] [2022-12-14 07:47:23,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089284648] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:23,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:23,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321172124] [2022-12-14 07:47:23,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:23,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:47:23,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:47:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:47:23,842 INFO L87 Difference]: Start difference. First operand has 128 states, 122 states have (on average 2.2540983606557377) internal successors, (275), 127 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:23,878 INFO L93 Difference]: Finished difference Result 128 states and 249 transitions. [2022-12-14 07:47:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:47:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:47:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:23,887 INFO L225 Difference]: With dead ends: 128 [2022-12-14 07:47:23,887 INFO L226 Difference]: Without dead ends: 128 [2022-12-14 07:47:23,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:47:23,890 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:23,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-14 07:47:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-12-14 07:47:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 2.040983606557377) internal successors, (249), 127 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 249 transitions. [2022-12-14 07:47:23,922 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 249 transitions. Word has length 5 [2022-12-14 07:47:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:23,923 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 249 transitions. [2022-12-14 07:47:23,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 249 transitions. [2022-12-14 07:47:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:47:23,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:23,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:47:23,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:47:23,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 07:47:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1325427854, now seen corresponding path program 1 times [2022-12-14 07:47:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:23,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867228311] [2022-12-14 07:47:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:23,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:24,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867228311] [2022-12-14 07:47:24,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867228311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:24,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:24,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762670406] [2022-12-14 07:47:24,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:24,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:24,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:24,053 INFO L87 Difference]: Start difference. First operand 128 states and 249 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:24,110 INFO L93 Difference]: Finished difference Result 118 states and 219 transitions. [2022-12-14 07:47:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:24,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:47:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:24,112 INFO L225 Difference]: With dead ends: 118 [2022-12-14 07:47:24,112 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 07:47:24,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:24,114 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:24,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 07:47:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-12-14 07:47:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.8860759493670887) internal successors, (149), 81 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 149 transitions. [2022-12-14 07:47:24,120 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 149 transitions. Word has length 6 [2022-12-14 07:47:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:24,120 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 149 transitions. [2022-12-14 07:47:24,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 149 transitions. [2022-12-14 07:47:24,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:47:24,121 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:24,121 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 07:47:24,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:47:24,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 07:47:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:24,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1330764708, now seen corresponding path program 1 times [2022-12-14 07:47:24,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:24,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013458859] [2022-12-14 07:47:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:24,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:47:24,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:47:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:47:24,151 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:47:24,152 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:47:24,152 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-14 07:47:24,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-14 07:47:24,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-14 07:47:24,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-14 07:47:24,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:47:24,156 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 07:47:24,158 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:47:24,158 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 07:47:24,174 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:47:24,176 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:47:24,176 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 93 transitions, 198 flow [2022-12-14 07:47:24,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 93 transitions, 198 flow [2022-12-14 07:47:24,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 93 transitions, 198 flow [2022-12-14 07:47:24,200 INFO L130 PetriNetUnfolder]: 13/171 cut-off events. [2022-12-14 07:47:24,200 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 07:47:24,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 171 events. 13/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 440 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-12-14 07:47:24,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 3400 [2022-12-14 07:47:25,362 INFO L134 LiptonReduction]: Checked pairs total: 12061 [2022-12-14 07:47:25,362 INFO L136 LiptonReduction]: Total number of compositions: 76 [2022-12-14 07:47:25,363 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 42 transitions, 96 flow [2022-12-14 07:47:25,423 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1548 states, 1533 states have (on average 3.2544031311154598) internal successors, (4989), 1547 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:25,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:47:25,425 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=FINITE_AUTOMATA, 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;@1da22779, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:47:25,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-14 07:47:25,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 1548 states, 1533 states have (on average 3.2544031311154598) internal successors, (4989), 1547 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:47:25,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:25,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:47:25,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-14 07:47:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash 551230839, now seen corresponding path program 1 times [2022-12-14 07:47:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:25,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249914960] [2022-12-14 07:47:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:25,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:25,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:25,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249914960] [2022-12-14 07:47:25,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249914960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:25,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:25,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:25,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887420807] [2022-12-14 07:47:25,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:25,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:47:25,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:25,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:47:25,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:47:25,445 INFO L87 Difference]: Start difference. First operand has 1548 states, 1533 states have (on average 3.2544031311154598) internal successors, (4989), 1547 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:25,490 INFO L93 Difference]: Finished difference Result 1548 states and 4519 transitions. [2022-12-14 07:47:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:47:25,490 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:47:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:25,497 INFO L225 Difference]: With dead ends: 1548 [2022-12-14 07:47:25,497 INFO L226 Difference]: Without dead ends: 1548 [2022-12-14 07:47:25,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:47:25,498 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:25,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2022-12-14 07:47:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1548. [2022-12-14 07:47:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1533 states have (on average 2.9478147423352903) internal successors, (4519), 1547 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 4519 transitions. [2022-12-14 07:47:25,552 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 4519 transitions. Word has length 5 [2022-12-14 07:47:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:25,552 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 4519 transitions. [2022-12-14 07:47:25,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 4519 transitions. [2022-12-14 07:47:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:47:25,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:25,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:47:25,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:47:25,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-14 07:47:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:25,554 INFO L85 PathProgramCache]: Analyzing trace with hash -89181592, now seen corresponding path program 1 times [2022-12-14 07:47:25,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:25,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037308302] [2022-12-14 07:47:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:25,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:25,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:25,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037308302] [2022-12-14 07:47:25,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037308302] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:25,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:25,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:25,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875604309] [2022-12-14 07:47:25,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:25,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:25,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:25,607 INFO L87 Difference]: Start difference. First operand 1548 states and 4519 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:25,694 INFO L93 Difference]: Finished difference Result 1670 states and 4679 transitions. [2022-12-14 07:47:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:47:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:25,700 INFO L225 Difference]: With dead ends: 1670 [2022-12-14 07:47:25,700 INFO L226 Difference]: Without dead ends: 1478 [2022-12-14 07:47:25,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:25,701 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:25,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 18 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-12-14 07:47:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1354. [2022-12-14 07:47:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1343 states have (on average 2.8428890543559198) internal successors, (3818), 1353 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 3818 transitions. [2022-12-14 07:47:25,734 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 3818 transitions. Word has length 6 [2022-12-14 07:47:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:25,734 INFO L495 AbstractCegarLoop]: Abstraction has 1354 states and 3818 transitions. [2022-12-14 07:47:25,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 3818 transitions. [2022-12-14 07:47:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:47:25,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:25,735 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 07:47:25,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:47:25,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-14 07:47:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:25,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2084600763, now seen corresponding path program 1 times [2022-12-14 07:47:25,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:25,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016383628] [2022-12-14 07:47:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:25,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:47:25,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:47:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:47:25,753 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:47:25,753 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:47:25,753 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-14 07:47:25,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-14 07:47:25,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-14 07:47:25,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-14 07:47:25,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-14 07:47:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:47:25,754 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 07:47:25,754 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:47:25,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 07:47:25,772 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:47:25,774 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:47:25,774 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 111 transitions, 243 flow [2022-12-14 07:47:25,774 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 111 transitions, 243 flow [2022-12-14 07:47:25,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 243 flow [2022-12-14 07:47:25,798 INFO L130 PetriNetUnfolder]: 18/229 cut-off events. [2022-12-14 07:47:25,798 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 07:47:25,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 673 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2022-12-14 07:47:25,803 INFO L119 LiptonReduction]: Number of co-enabled transitions 6018 [2022-12-14 07:47:27,063 INFO L134 LiptonReduction]: Checked pairs total: 24616 [2022-12-14 07:47:27,063 INFO L136 LiptonReduction]: Total number of compositions: 84 [2022-12-14 07:47:27,064 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 53 transitions, 127 flow [2022-12-14 07:47:27,467 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16128 states, 16094 states have (on average 4.234186653411209) internal successors, (68145), 16127 states have internal predecessors, (68145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:27,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:47:27,468 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=FINITE_AUTOMATA, 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;@1da22779, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:47:27,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 07:47:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 16128 states, 16094 states have (on average 4.234186653411209) internal successors, (68145), 16127 states have internal predecessors, (68145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:47:27,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:27,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:47:27,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-14 07:47:27,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash 753518700, now seen corresponding path program 1 times [2022-12-14 07:47:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:27,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111338589] [2022-12-14 07:47:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:27,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:27,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111338589] [2022-12-14 07:47:27,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111338589] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:27,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:27,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:27,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450548837] [2022-12-14 07:47:27,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:27,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:47:27,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:27,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:47:27,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:47:27,555 INFO L87 Difference]: Start difference. First operand has 16128 states, 16094 states have (on average 4.234186653411209) internal successors, (68145), 16127 states have internal predecessors, (68145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:27,812 INFO L93 Difference]: Finished difference Result 16128 states and 63039 transitions. [2022-12-14 07:47:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:47:27,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:47:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:27,920 INFO L225 Difference]: With dead ends: 16128 [2022-12-14 07:47:27,920 INFO L226 Difference]: Without dead ends: 16128 [2022-12-14 07:47:27,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:47:27,921 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:27,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16128 states. [2022-12-14 07:47:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16128 to 16128. [2022-12-14 07:47:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16128 states, 16094 states have (on average 3.916925562321362) internal successors, (63039), 16127 states have internal predecessors, (63039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16128 states to 16128 states and 63039 transitions. [2022-12-14 07:47:28,577 INFO L78 Accepts]: Start accepts. Automaton has 16128 states and 63039 transitions. Word has length 5 [2022-12-14 07:47:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:28,577 INFO L495 AbstractCegarLoop]: Abstraction has 16128 states and 63039 transitions. [2022-12-14 07:47:28,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16128 states and 63039 transitions. [2022-12-14 07:47:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:47:28,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:28,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:47:28,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:47:28,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-14 07:47:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1884927168, now seen corresponding path program 1 times [2022-12-14 07:47:28,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:28,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149348061] [2022-12-14 07:47:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:28,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:28,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:28,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149348061] [2022-12-14 07:47:28,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149348061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:28,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:28,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:28,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877089759] [2022-12-14 07:47:28,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:28,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:28,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:28,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:28,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:28,684 INFO L87 Difference]: Start difference. First operand 16128 states and 63039 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:28,905 INFO L93 Difference]: Finished difference Result 20123 states and 75408 transitions. [2022-12-14 07:47:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:47:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:29,019 INFO L225 Difference]: With dead ends: 20123 [2022-12-14 07:47:29,019 INFO L226 Difference]: Without dead ends: 19283 [2022-12-14 07:47:29,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:29,020 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:29,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 21 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19283 states. [2022-12-14 07:47:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19283 to 16861. [2022-12-14 07:47:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16861 states, 16832 states have (on average 3.790518060836502) internal successors, (63802), 16860 states have internal predecessors, (63802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16861 states to 16861 states and 63802 transitions. [2022-12-14 07:47:29,494 INFO L78 Accepts]: Start accepts. Automaton has 16861 states and 63802 transitions. Word has length 6 [2022-12-14 07:47:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:29,494 INFO L495 AbstractCegarLoop]: Abstraction has 16861 states and 63802 transitions. [2022-12-14 07:47:29,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 16861 states and 63802 transitions. [2022-12-14 07:47:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:47:29,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:29,497 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 07:47:29,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:47:29,497 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-14 07:47:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:29,498 INFO L85 PathProgramCache]: Analyzing trace with hash 722572011, now seen corresponding path program 1 times [2022-12-14 07:47:29,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:29,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285088763] [2022-12-14 07:47:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:29,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:47:29,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:47:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:47:29,522 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:47:29,523 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:47:29,523 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-14 07:47:29,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-14 07:47:29,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-14 07:47:29,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-14 07:47:29,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-14 07:47:29,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-14 07:47:29,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:47:29,524 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 07:47:29,525 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:47:29,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-14 07:47:29,548 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:47:29,550 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:47:29,550 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 129 transitions, 290 flow [2022-12-14 07:47:29,550 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 129 transitions, 290 flow [2022-12-14 07:47:29,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 129 transitions, 290 flow [2022-12-14 07:47:29,622 INFO L130 PetriNetUnfolder]: 23/287 cut-off events. [2022-12-14 07:47:29,623 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-14 07:47:29,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 287 events. 23/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 895 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2022-12-14 07:47:29,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 9248 [2022-12-14 07:47:30,971 INFO L134 LiptonReduction]: Checked pairs total: 36916 [2022-12-14 07:47:30,972 INFO L136 LiptonReduction]: Total number of compositions: 100 [2022-12-14 07:47:30,972 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 66 transitions, 164 flow [2022-12-14 07:47:34,570 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 163848 states, 163775 states have (on average 5.4248145321324985) internal successors, (888449), 163847 states have internal predecessors, (888449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:34,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:47:34,571 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=FINITE_AUTOMATA, 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;@1da22779, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:47:34,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-14 07:47:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 163848 states, 163775 states have (on average 5.4248145321324985) internal successors, (888449), 163847 states have internal predecessors, (888449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:47:34,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:34,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:47:34,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 07:47:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:34,945 INFO L85 PathProgramCache]: Analyzing trace with hash 991939064, now seen corresponding path program 1 times [2022-12-14 07:47:34,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:34,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119497886] [2022-12-14 07:47:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:34,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:34,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119497886] [2022-12-14 07:47:34,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119497886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:34,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274630986] [2022-12-14 07:47:34,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:34,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:47:34,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:34,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:47:34,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:47:35,168 INFO L87 Difference]: Start difference. First operand has 163848 states, 163775 states have (on average 5.4248145321324985) internal successors, (888449), 163847 states have internal predecessors, (888449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:36,916 INFO L93 Difference]: Finished difference Result 163848 states and 803639 transitions. [2022-12-14 07:47:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:47:36,917 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:47:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:38,165 INFO L225 Difference]: With dead ends: 163848 [2022-12-14 07:47:38,166 INFO L226 Difference]: Without dead ends: 163848 [2022-12-14 07:47:38,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:47:38,166 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:38,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163848 states. [2022-12-14 07:47:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163848 to 163848. [2022-12-14 07:47:43,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163848 states, 163775 states have (on average 4.906969928255228) internal successors, (803639), 163847 states have internal predecessors, (803639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163848 states to 163848 states and 803639 transitions. [2022-12-14 07:47:44,444 INFO L78 Accepts]: Start accepts. Automaton has 163848 states and 803639 transitions. Word has length 5 [2022-12-14 07:47:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:44,444 INFO L495 AbstractCegarLoop]: Abstraction has 163848 states and 803639 transitions. [2022-12-14 07:47:44,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 163848 states and 803639 transitions. [2022-12-14 07:47:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:47:44,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:44,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:47:44,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:47:44,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 07:47:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 688794066, now seen corresponding path program 1 times [2022-12-14 07:47:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123272731] [2022-12-14 07:47:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:44,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:44,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123272731] [2022-12-14 07:47:44,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123272731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:44,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:44,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:44,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020576628] [2022-12-14 07:47:44,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:44,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:44,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:44,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:44,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:44,483 INFO L87 Difference]: Start difference. First operand 163848 states and 803639 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:46,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:46,797 INFO L93 Difference]: Finished difference Result 229260 states and 1076181 transitions. [2022-12-14 07:47:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:47:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:48,299 INFO L225 Difference]: With dead ends: 229260 [2022-12-14 07:47:48,299 INFO L226 Difference]: Without dead ends: 225936 [2022-12-14 07:47:48,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:48,300 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:48,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 24 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225936 states. [2022-12-14 07:47:54,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225936 to 193324. [2022-12-14 07:47:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193324 states, 193257 states have (on average 4.745551260756402) internal successors, (917111), 193323 states have internal predecessors, (917111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193324 states to 193324 states and 917111 transitions. [2022-12-14 07:47:55,603 INFO L78 Accepts]: Start accepts. Automaton has 193324 states and 917111 transitions. Word has length 6 [2022-12-14 07:47:55,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:55,603 INFO L495 AbstractCegarLoop]: Abstraction has 193324 states and 917111 transitions. [2022-12-14 07:47:55,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 193324 states and 917111 transitions. [2022-12-14 07:47:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:47:55,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:55,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:55,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:47:55,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 07:47:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash -429856624, now seen corresponding path program 1 times [2022-12-14 07:47:55,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:55,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125515499] [2022-12-14 07:47:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:55,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:55,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125515499] [2022-12-14 07:47:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125515499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:47:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968829882] [2022-12-14 07:47:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:55,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:55,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:55,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:47:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:47:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:55,998 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 [2022-12-14 07:47:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:56,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:56,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968829882] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:56,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2080736503] [2022-12-14 07:47:56,381 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 07:47:56,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:47:56,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2022-12-14 07:47:56,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933686856] [2022-12-14 07:47:56,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:47:56,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:47:56,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:56,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:47:56,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:47:56,385 INFO L87 Difference]: Start difference. First operand 193324 states and 917111 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:48:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:05,797 INFO L93 Difference]: Finished difference Result 699792 states and 3157461 transitions. [2022-12-14 07:48:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 07:48:05,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:48:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:10,739 INFO L225 Difference]: With dead ends: 699792 [2022-12-14 07:48:10,739 INFO L226 Difference]: Without dead ends: 698766 [2022-12-14 07:48:10,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:48:10,756 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 922 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1820 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:10,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 328 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1820 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 07:48:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698766 states. [2022-12-14 07:48:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698766 to 260454. [2022-12-14 07:48:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260454 states, 260387 states have (on average 4.778564214035263) internal successors, (1244276), 260453 states have internal predecessors, (1244276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:48:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260454 states to 260454 states and 1244276 transitions. [2022-12-14 07:48:26,289 INFO L78 Accepts]: Start accepts. Automaton has 260454 states and 1244276 transitions. Word has length 16 [2022-12-14 07:48:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:26,289 INFO L495 AbstractCegarLoop]: Abstraction has 260454 states and 1244276 transitions. [2022-12-14 07:48:26,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:48:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 260454 states and 1244276 transitions. [2022-12-14 07:48:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:48:26,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:26,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:26,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:48:26,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 07:48:26,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 07:48:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1238876494, now seen corresponding path program 2 times [2022-12-14 07:48:26,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135011630] [2022-12-14 07:48:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:48:26,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:26,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135011630] [2022-12-14 07:48:26,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135011630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:26,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:26,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:48:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914790810] [2022-12-14 07:48:26,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:26,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:48:26,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:48:26,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:26,691 INFO L87 Difference]: Start difference. First operand 260454 states and 1244276 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:48:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:29,466 INFO L93 Difference]: Finished difference Result 260454 states and 1244529 transitions. [2022-12-14 07:48:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:48:29,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:48:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:31,185 INFO L225 Difference]: With dead ends: 260454 [2022-12-14 07:48:31,186 INFO L226 Difference]: Without dead ends: 260440 [2022-12-14 07:48:31,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:31,186 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:31,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 120 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:48:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260440 states. [2022-12-14 07:48:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260440 to 260440. [2022-12-14 07:48:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260440 states, 260375 states have (on average 4.779656265002401) internal successors, (1244503), 260439 states have internal predecessors, (1244503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:48:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260440 states to 260440 states and 1244503 transitions. [2022-12-14 07:48:39,664 INFO L78 Accepts]: Start accepts. Automaton has 260440 states and 1244503 transitions. Word has length 16 [2022-12-14 07:48:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:39,664 INFO L495 AbstractCegarLoop]: Abstraction has 260440 states and 1244503 transitions. [2022-12-14 07:48:39,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:48:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 260440 states and 1244503 transitions. [2022-12-14 07:48:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 07:48:39,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:39,667 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:39,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:48:39,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 07:48:39,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:39,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1376278673, now seen corresponding path program 1 times [2022-12-14 07:48:39,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:39,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186401051] [2022-12-14 07:48:39,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:39,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:39,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:39,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186401051] [2022-12-14 07:48:39,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186401051] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:39,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696962455] [2022-12-14 07:48:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:39,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:39,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:39,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a57056d-9065-4c1a-91e8-97cd094bc5cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:48:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:48:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:39,964 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 [2022-12-14 07:48:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:39,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:48:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:40,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696962455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:48:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867242504] [2022-12-14 07:48:40,065 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 07:48:40,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:48:40,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2022-12-14 07:48:40,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19854860] [2022-12-14 07:48:40,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:48:40,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:48:40,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:48:40,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:48:40,067 INFO L87 Difference]: Start difference. First operand 260440 states and 1244503 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)