./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/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_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/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_c52da895-7492-4893-a63d-1e0b92cb07e2/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 a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- 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 10:07:29,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:07:29,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:07:29,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:07:29,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:07:29,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:07:29,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:07:29,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:07:29,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:07:29,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:07:29,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:07:29,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:07:29,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:07:29,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:07:29,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:07:29,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:07:29,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:07:29,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:07:29,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:07:29,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:07:29,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:07:29,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:07:29,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:07:29,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:07:29,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:07:29,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:07:29,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:07:29,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:07:29,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:07:29,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:07:29,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:07:29,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:07:29,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:07:29,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:07:29,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:07:29,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:07:29,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:07:29,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:07:29,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:07:29,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:07:29,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:07:29,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:07:29,076 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:07:29,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:07:29,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:07:29,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:07:29,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:07:29,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:07:29,078 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:07:29,078 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:07:29,078 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:07:29,078 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:07:29,078 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:07:29,078 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:07:29,079 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:07:29,079 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:07:29,079 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:07:29,079 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:07:29,079 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:07:29,079 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:07:29,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:07:29,080 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:07:29,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:07:29,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:07:29,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:07:29,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:07:29,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:07:29,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:07:29,081 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:07:29,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:07:29,082 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:07:29,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:07:29,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:07:29,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:07:29,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:07:29,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:07:29,083 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:07:29,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:07:29,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:07:29,083 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:07:29,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:07:29,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:07:29,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:07:29,084 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_c52da895-7492-4893-a63d-1e0b92cb07e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2022-12-14 10:07:29,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:07:29,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:07:29,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:07:29,271 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:07:29,272 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:07:29,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-12-14 10:07:31,842 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:07:32,015 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:07:32,016 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-12-14 10:07:32,020 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/data/f7abea75e/944860d0bafd4bf69530ae820a559c2f/FLAGf59ba7606 [2022-12-14 10:07:32,419 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/data/f7abea75e/944860d0bafd4bf69530ae820a559c2f [2022-12-14 10:07:32,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:07:32,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:07:32,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:07:32,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:07:32,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:07:32,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7c38ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32, skipping insertion in model container [2022-12-14 10:07:32,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:07:32,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:07:32,593 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,595 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,596 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,598 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,598 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,599 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,601 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,602 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,602 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,603 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,603 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,604 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,604 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,605 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,605 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,607 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,612 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_c52da895-7492-4893-a63d-1e0b92cb07e2/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-12-14 10:07:32,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:07:32,624 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:07:32,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,637 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,637 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:07:32,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:07:32,647 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_c52da895-7492-4893-a63d-1e0b92cb07e2/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-12-14 10:07:32,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:07:32,658 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:07:32,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32 WrapperNode [2022-12-14 10:07:32,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:07:32,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:07:32,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:07:32,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:07:32,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,685 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-12-14 10:07:32,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:07:32,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:07:32,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:07:32,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:07:32,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:07:32,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:07:32,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:07:32,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:07:32,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (1/1) ... [2022-12-14 10:07:32,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:07:32,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:32,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:07:32,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:07:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:07:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 10:07:32,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 10:07:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 10:07:32,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 10:07:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 10:07:32,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 10:07:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:07:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:07:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:07:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 10:07:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 10:07:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:07:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:07:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:07:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:07:32,764 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 10:07:32,851 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:07:32,853 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:07:33,048 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:07:33,092 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:07:33,092 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 10:07:33,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:07:33 BoogieIcfgContainer [2022-12-14 10:07:33,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:07:33,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:07:33,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:07:33,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:07:33,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:07:32" (1/3) ... [2022-12-14 10:07:33,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6a5911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:07:33, skipping insertion in model container [2022-12-14 10:07:33,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:07:32" (2/3) ... [2022-12-14 10:07:33,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6a5911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:07:33, skipping insertion in model container [2022-12-14 10:07:33,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:07:33" (3/3) ... [2022-12-14 10:07:33,100 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2022-12-14 10:07:33,106 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 10:07:33,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:07:33,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:07:33,114 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 10:07:33,170 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 10:07:33,193 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:07:33,204 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 115 transitions, 254 flow [2022-12-14 10:07:33,206 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 115 transitions, 254 flow [2022-12-14 10:07:33,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2022-12-14 10:07:33,269 INFO L130 PetriNetUnfolder]: 8/112 cut-off events. [2022-12-14 10:07:33,269 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 10:07:33,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 8/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-14 10:07:33,275 INFO L119 LiptonReduction]: Number of co-enabled transitions 1010 [2022-12-14 10:07:35,851 INFO L134 LiptonReduction]: Checked pairs total: 1981 [2022-12-14 10:07:35,851 INFO L136 LiptonReduction]: Total number of compositions: 99 [2022-12-14 10:07:35,857 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-12-14 10:07:35,879 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 212 states, 211 states have (on average 3.203791469194313) internal successors, (676), 211 states have internal predecessors, (676), 0 states have call successors, (0), 0 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 10:07:35,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:07:35,896 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;@358eddc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:07:35,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 10:07:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 211 states have (on average 3.203791469194313) internal successors, (676), 211 states have internal predecessors, (676), 0 states have call successors, (0), 0 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 10:07:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 10:07:35,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:35,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:35,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:07:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1075557032, now seen corresponding path program 1 times [2022-12-14 10:07:35,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:35,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87534369] [2022-12-14 10:07:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:35,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:36,486 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 10:07:36,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:36,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87534369] [2022-12-14 10:07:36,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87534369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:36,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:36,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:07:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655977666] [2022-12-14 10:07:36,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:36,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:07:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:07:36,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:07:36,515 INFO L87 Difference]: Start difference. First operand has 212 states, 211 states have (on average 3.203791469194313) internal successors, (676), 211 states have internal predecessors, (676), 0 states have call successors, (0), 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 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 10:07:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:36,666 INFO L93 Difference]: Finished difference Result 348 states and 1132 transitions. [2022-12-14 10:07:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:07:36,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-12-14 10:07:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:36,678 INFO L225 Difference]: With dead ends: 348 [2022-12-14 10:07:36,678 INFO L226 Difference]: Without dead ends: 348 [2022-12-14 10:07:36,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:07:36,681 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:36,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 5 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-12-14 10:07:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 280. [2022-12-14 10:07:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.240143369175627) internal successors, (904), 279 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 10:07:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 904 transitions. [2022-12-14 10:07:36,723 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 904 transitions. Word has length 19 [2022-12-14 10:07:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:36,724 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 904 transitions. [2022-12-14 10:07:36,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 10:07:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 904 transitions. [2022-12-14 10:07:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:07:36,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:36,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:36,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:07:36,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:07:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1256038729, now seen corresponding path program 1 times [2022-12-14 10:07:36,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:36,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419925444] [2022-12-14 10:07:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:36,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:36,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419925444] [2022-12-14 10:07:36,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419925444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:36,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:36,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:07:36,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313555411] [2022-12-14 10:07:36,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:36,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:07:36,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:07:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:07:36,988 INFO L87 Difference]: Start difference. First operand 280 states and 904 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 10:07:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:37,227 INFO L93 Difference]: Finished difference Result 470 states and 1437 transitions. [2022-12-14 10:07:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:07:37,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-12-14 10:07:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:37,230 INFO L225 Difference]: With dead ends: 470 [2022-12-14 10:07:37,230 INFO L226 Difference]: Without dead ends: 462 [2022-12-14 10:07:37,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:07:37,232 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:37,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 5 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:07:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-12-14 10:07:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 396. [2022-12-14 10:07:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.258227848101266) internal successors, (1287), 395 states have internal predecessors, (1287), 0 states have call successors, (0), 0 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 10:07:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1287 transitions. [2022-12-14 10:07:37,252 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1287 transitions. Word has length 21 [2022-12-14 10:07:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:37,252 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 1287 transitions. [2022-12-14 10:07:37,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 10:07:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1287 transitions. [2022-12-14 10:07:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:07:37,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:37,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:37,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:07:37,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:07:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1861038745, now seen corresponding path program 1 times [2022-12-14 10:07:37,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:37,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602178189] [2022-12-14 10:07:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:37,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602178189] [2022-12-14 10:07:37,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602178189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:37,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:37,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:07:37,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116922017] [2022-12-14 10:07:37,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:37,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:07:37,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:07:37,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:07:37,432 INFO L87 Difference]: Start difference. First operand 396 states and 1287 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 10:07:37,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:37,555 INFO L93 Difference]: Finished difference Result 570 states and 1778 transitions. [2022-12-14 10:07:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:07:37,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-12-14 10:07:37,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:37,558 INFO L225 Difference]: With dead ends: 570 [2022-12-14 10:07:37,558 INFO L226 Difference]: Without dead ends: 548 [2022-12-14 10:07:37,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:07:37,559 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:37,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 4 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:37,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-12-14 10:07:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 412. [2022-12-14 10:07:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.2603406326034063) internal successors, (1340), 411 states have internal predecessors, (1340), 0 states have call successors, (0), 0 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 10:07:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1340 transitions. [2022-12-14 10:07:37,575 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1340 transitions. Word has length 21 [2022-12-14 10:07:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:37,575 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 1340 transitions. [2022-12-14 10:07:37,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 10:07:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1340 transitions. [2022-12-14 10:07:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:07:37,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:37,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:37,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:07:37,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:07:37,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:37,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1089956875, now seen corresponding path program 2 times [2022-12-14 10:07:37,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:37,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708714028] [2022-12-14 10:07:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:37,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:37,927 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 10:07:37,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708714028] [2022-12-14 10:07:37,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708714028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:37,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122335330] [2022-12-14 10:07:37,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:07:37,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:37,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:37,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:37,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:07:38,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:07:38,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:38,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:07:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:38,154 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 10:07:38,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:38,300 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 10:07:38,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122335330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:38,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393398853] [2022-12-14 10:07:38,306 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 10:07:38,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:07:38,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-12-14 10:07:38,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212372424] [2022-12-14 10:07:38,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:38,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:07:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:07:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:07:38,309 INFO L87 Difference]: Start difference. First operand 412 states and 1340 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 10:07:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:39,049 INFO L93 Difference]: Finished difference Result 996 states and 3062 transitions. [2022-12-14 10:07:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 10:07:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2022-12-14 10:07:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:39,053 INFO L225 Difference]: With dead ends: 996 [2022-12-14 10:07:39,053 INFO L226 Difference]: Without dead ends: 940 [2022-12-14 10:07:39,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:07:39,055 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 200 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:39,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:07:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-12-14 10:07:39,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 406. [2022-12-14 10:07:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3925925925925924) internal successors, (1374), 405 states have internal predecessors, (1374), 0 states have call successors, (0), 0 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 10:07:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1374 transitions. [2022-12-14 10:07:39,075 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1374 transitions. Word has length 21 [2022-12-14 10:07:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:39,075 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 1374 transitions. [2022-12-14 10:07:39,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 10:07:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1374 transitions. [2022-12-14 10:07:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:07:39,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:39,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:39,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:07:39,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:39,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:07:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:39,279 INFO L85 PathProgramCache]: Analyzing trace with hash 734478361, now seen corresponding path program 2 times [2022-12-14 10:07:39,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42907111] [2022-12-14 10:07:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:39,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:39,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:39,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42907111] [2022-12-14 10:07:39,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42907111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:39,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135298296] [2022-12-14 10:07:39,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:07:39,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:39,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:39,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:39,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:07:39,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 10:07:39,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:07:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:39,698 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 10:07:39,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:39,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135298296] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:39,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:07:39,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-12-14 10:07:39,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375258142] [2022-12-14 10:07:39,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:39,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:07:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:07:39,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:07:39,699 INFO L87 Difference]: Start difference. First operand 406 states and 1374 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 10:07:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:39,772 INFO L93 Difference]: Finished difference Result 490 states and 1674 transitions. [2022-12-14 10:07:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:07:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-12-14 10:07:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:39,776 INFO L225 Difference]: With dead ends: 490 [2022-12-14 10:07:39,776 INFO L226 Difference]: Without dead ends: 490 [2022-12-14 10:07:39,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:07:39,777 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:39,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-12-14 10:07:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 436. [2022-12-14 10:07:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.4) internal successors, (1479), 435 states have internal predecessors, (1479), 0 states have call successors, (0), 0 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 10:07:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1479 transitions. [2022-12-14 10:07:39,787 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1479 transitions. Word has length 21 [2022-12-14 10:07:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:39,788 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 1479 transitions. [2022-12-14 10:07:39,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 10:07:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1479 transitions. [2022-12-14 10:07:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:07:39,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:39,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:39,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:07:39,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:39,990 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:07:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1922672693, now seen corresponding path program 3 times [2022-12-14 10:07:39,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:39,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99757989] [2022-12-14 10:07:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:39,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:40,278 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 10:07:40,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99757989] [2022-12-14 10:07:40,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99757989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836597938] [2022-12-14 10:07:40,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:07:40,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:40,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:40,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:07:40,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:07:40,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:07:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:40,431 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 10:07:40,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:40,553 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 10:07:40,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836597938] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1029917146] [2022-12-14 10:07:40,554 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 10:07:40,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:07:40,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2022-12-14 10:07:40,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588770868] [2022-12-14 10:07:40,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:40,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:07:40,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:07:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:07:40,556 INFO L87 Difference]: Start difference. First operand 436 states and 1479 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 10:07:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:41,059 INFO L93 Difference]: Finished difference Result 796 states and 2643 transitions. [2022-12-14 10:07:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:07:41,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 21 [2022-12-14 10:07:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:41,063 INFO L225 Difference]: With dead ends: 796 [2022-12-14 10:07:41,063 INFO L226 Difference]: Without dead ends: 796 [2022-12-14 10:07:41,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:07:41,064 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:41,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 38 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:07:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-12-14 10:07:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 462. [2022-12-14 10:07:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.403470715835141) internal successors, (1569), 461 states have internal predecessors, (1569), 0 states have call successors, (0), 0 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 10:07:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1569 transitions. [2022-12-14 10:07:41,077 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1569 transitions. Word has length 21 [2022-12-14 10:07:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:41,077 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 1569 transitions. [2022-12-14 10:07:41,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 10:07:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1569 transitions. [2022-12-14 10:07:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 10:07:41,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:41,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:41,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:07:41,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 10:07:41,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:07:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1347177610, now seen corresponding path program 1 times [2022-12-14 10:07:41,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:41,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084786805] [2022-12-14 10:07:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:41,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:42,971 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 10:07:42,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:42,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084786805] [2022-12-14 10:07:42,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084786805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:42,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383136348] [2022-12-14 10:07:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:42,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:42,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:42,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:42,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:07:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:43,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 10:07:43,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:44,411 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 10:07:44,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:46,495 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 10:07:46,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383136348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:46,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152488723] [2022-12-14 10:07:46,496 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 10:07:46,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:07:46,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-12-14 10:07:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927899294] [2022-12-14 10:07:46,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:46,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 10:07:46,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:46,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 10:07:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:07:46,498 INFO L87 Difference]: Start difference. First operand 462 states and 1569 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 10:08:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:45,826 INFO L93 Difference]: Finished difference Result 3430 states and 11155 transitions. [2022-12-14 10:08:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-12-14 10:08:45,827 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 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 23 [2022-12-14 10:08:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:45,835 INFO L225 Difference]: With dead ends: 3430 [2022-12-14 10:08:45,835 INFO L226 Difference]: Without dead ends: 2444 [2022-12-14 10:08:45,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8615 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=4504, Invalid=17845, Unknown=1, NotChecked=0, Total=22350 [2022-12-14 10:08:45,838 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 867 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:45,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 0 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-12-14 10:08:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-12-14 10:08:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 728. [2022-12-14 10:08:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.514442916093535) internal successors, (2555), 727 states have internal predecessors, (2555), 0 states have call successors, (0), 0 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 10:08:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2555 transitions. [2022-12-14 10:08:45,865 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2555 transitions. Word has length 23 [2022-12-14 10:08:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:45,866 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 2555 transitions. [2022-12-14 10:08:45,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 10:08:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2555 transitions. [2022-12-14 10:08:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 10:08:45,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:45,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:45,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:08:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:46,068 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:08:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -921432364, now seen corresponding path program 2 times [2022-12-14 10:08:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:46,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042223390] [2022-12-14 10:08:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:47,966 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 10:08:47,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:08:47,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042223390] [2022-12-14 10:08:47,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042223390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:08:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942163025] [2022-12-14 10:08:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:08:47,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:47,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:47,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:47,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:08:48,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:08:48,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:48,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 10:08:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:48,796 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 10:08:48,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:50,988 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 10:08:50,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942163025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621751902] [2022-12-14 10:08:50,988 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 10:08:50,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:08:50,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 25 [2022-12-14 10:08:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507217802] [2022-12-14 10:08:50,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:50,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:08:50,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:08:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:08:50,990 INFO L87 Difference]: Start difference. First operand 728 states and 2555 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 10:09:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:31,606 INFO L93 Difference]: Finished difference Result 3062 states and 10041 transitions. [2022-12-14 10:09:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-12-14 10:09:31,607 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 10:09:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:31,614 INFO L225 Difference]: With dead ends: 3062 [2022-12-14 10:09:31,614 INFO L226 Difference]: Without dead ends: 2176 [2022-12-14 10:09:31,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4533 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=2316, Invalid=10566, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 10:09:31,616 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 535 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:31,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-12-14 10:09:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2022-12-14 10:09:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 970. [2022-12-14 10:09:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 3.607843137254902) internal successors, (3496), 969 states have internal predecessors, (3496), 0 states have call successors, (0), 0 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 10:09:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 3496 transitions. [2022-12-14 10:09:31,656 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 3496 transitions. Word has length 23 [2022-12-14 10:09:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:31,656 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 3496 transitions. [2022-12-14 10:09:31,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 10:09:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 3496 transitions. [2022-12-14 10:09:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:09:31,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:31,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:31,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:09:31,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:31,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:09:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:31,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1836835417, now seen corresponding path program 1 times [2022-12-14 10:09:31,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:31,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233694218] [2022-12-14 10:09:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:32,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:32,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233694218] [2022-12-14 10:09:32,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233694218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:32,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954849443] [2022-12-14 10:09:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:32,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:32,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:32,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:32,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:09:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:32,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:09:32,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:32,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:32,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954849443] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:32,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458495795] [2022-12-14 10:09:32,432 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 10:09:32,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:32,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2022-12-14 10:09:32,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79627138] [2022-12-14 10:09:32,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:32,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:09:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:32,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:09:32,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:09:32,434 INFO L87 Difference]: Start difference. First operand 970 states and 3496 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 10:09:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:33,730 INFO L93 Difference]: Finished difference Result 3596 states and 12673 transitions. [2022-12-14 10:09:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 10:09:33,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 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 25 [2022-12-14 10:09:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:33,744 INFO L225 Difference]: With dead ends: 3596 [2022-12-14 10:09:33,744 INFO L226 Difference]: Without dead ends: 3568 [2022-12-14 10:09:33,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:09:33,745 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 207 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:33,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 21 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:09:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-12-14 10:09:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 1284. [2022-12-14 10:09:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.692127825409197) internal successors, (4737), 1283 states have internal predecessors, (4737), 0 states have call successors, (0), 0 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 10:09:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4737 transitions. [2022-12-14 10:09:33,783 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4737 transitions. Word has length 25 [2022-12-14 10:09:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:33,783 INFO L495 AbstractCegarLoop]: Abstraction has 1284 states and 4737 transitions. [2022-12-14 10:09:33,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 10:09:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4737 transitions. [2022-12-14 10:09:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:09:33,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:33,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:33,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:09:33,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 10:09:33,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:09:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1084880699, now seen corresponding path program 2 times [2022-12-14 10:09:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:33,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507260121] [2022-12-14 10:09:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:35,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507260121] [2022-12-14 10:09:35,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507260121] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207987909] [2022-12-14 10:09:35,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:35,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:35,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:35,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:09:35,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:09:35,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:35,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:09:35,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:36,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:38,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207987909] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:38,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709572975] [2022-12-14 10:09:38,964 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 10:09:38,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:38,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2022-12-14 10:09:38,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172519587] [2022-12-14 10:09:38,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:38,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 10:09:38,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:38,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 10:09:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:09:38,966 INFO L87 Difference]: Start difference. First operand 1284 states and 4737 transitions. Second operand has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:10:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:29,271 INFO L93 Difference]: Finished difference Result 4819 states and 16915 transitions. [2022-12-14 10:10:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-12-14 10:10:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 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 25 [2022-12-14 10:10:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:29,287 INFO L225 Difference]: With dead ends: 4819 [2022-12-14 10:10:29,287 INFO L226 Difference]: Without dead ends: 4124 [2022-12-14 10:10:29,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7422 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=3435, Invalid=16587, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 10:10:29,290 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 533 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 3482 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:29,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 2 Invalid, 3553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3482 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2022-12-14 10:10:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2022-12-14 10:10:29,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 1620. [2022-12-14 10:10:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.778875849289685) internal successors, (6118), 1619 states have internal predecessors, (6118), 0 states have call successors, (0), 0 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 10:10:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 6118 transitions. [2022-12-14 10:10:29,340 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 6118 transitions. Word has length 25 [2022-12-14 10:10:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:29,341 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 6118 transitions. [2022-12-14 10:10:29,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:10:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 6118 transitions. [2022-12-14 10:10:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:10:29,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:29,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:29,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:10:29,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 10:10:29,546 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:10:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1918833867, now seen corresponding path program 3 times [2022-12-14 10:10:29,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:29,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742443782] [2022-12-14 10:10:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:29,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:33,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:33,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742443782] [2022-12-14 10:10:33,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742443782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:33,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378323703] [2022-12-14 10:10:33,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:10:33,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:33,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:33,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:33,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:10:33,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:10:33,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 10:10:33,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:34,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:38,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378323703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:38,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580200844] [2022-12-14 10:10:38,226 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 10:10:38,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:10:38,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-14 10:10:38,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374487284] [2022-12-14 10:10:38,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:38,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 10:10:38,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:10:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 10:10:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:10:38,227 INFO L87 Difference]: Start difference. First operand 1620 states and 6118 transitions. Second operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:00,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 10:11:16,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 10:12:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:12:35,954 INFO L93 Difference]: Finished difference Result 5987 states and 20239 transitions. [2022-12-14 10:12:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-12-14 10:12:35,955 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 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 25 [2022-12-14 10:12:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:12:35,968 INFO L225 Difference]: With dead ends: 5987 [2022-12-14 10:12:35,968 INFO L226 Difference]: Without dead ends: 5316 [2022-12-14 10:12:35,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14858 ImplicationChecksByTransitivity, 100.8s TimeCoverageRelationStatistics Valid=5400, Invalid=32820, Unknown=0, NotChecked=0, Total=38220 [2022-12-14 10:12:35,971 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1274 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4152 mSolverCounterSat, 219 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 4152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:12:35,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 0 Invalid, 4372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 4152 Invalid, 1 Unknown, 0 Unchecked, 21.3s Time] [2022-12-14 10:12:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-12-14 10:12:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2014. [2022-12-14 10:12:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 3.851465474416294) internal successors, (7753), 2013 states have internal predecessors, (7753), 0 states have call successors, (0), 0 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 10:12:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 7753 transitions. [2022-12-14 10:12:36,045 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 7753 transitions. Word has length 25 [2022-12-14 10:12:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:12:36,045 INFO L495 AbstractCegarLoop]: Abstraction has 2014 states and 7753 transitions. [2022-12-14 10:12:36,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:12:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 7753 transitions. [2022-12-14 10:12:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:12:36,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:12:36,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:12:36,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:12:36,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:36,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:12:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:12:36,252 INFO L85 PathProgramCache]: Analyzing trace with hash -117665003, now seen corresponding path program 4 times [2022-12-14 10:12:36,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:12:36,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541051025] [2022-12-14 10:12:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:12:36,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:12:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:36,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:12:36,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541051025] [2022-12-14 10:12:36,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541051025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:12:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5713759] [2022-12-14 10:12:36,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:12:36,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:12:36,996 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:12:36,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:12:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 10:12:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:38,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:39,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5713759] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:39,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946870816] [2022-12-14 10:12:39,921 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 10:12:39,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:12:39,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 29 [2022-12-14 10:12:39,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555530244] [2022-12-14 10:12:39,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:12:39,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:12:39,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:12:39,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:12:39,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:12:39,922 INFO L87 Difference]: Start difference. First operand 2014 states and 7753 transitions. Second operand has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:13:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:13:41,380 INFO L93 Difference]: Finished difference Result 6542 states and 22895 transitions. [2022-12-14 10:13:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-12-14 10:13:41,381 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 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 25 [2022-12-14 10:13:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:13:41,393 INFO L225 Difference]: With dead ends: 6542 [2022-12-14 10:13:41,393 INFO L226 Difference]: Without dead ends: 5400 [2022-12-14 10:13:41,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7918 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=3701, Invalid=17468, Unknown=1, NotChecked=0, Total=21170 [2022-12-14 10:13:41,395 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 846 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2829 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:13:41,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 0 Invalid, 3017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2829 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-12-14 10:13:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-12-14 10:13:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2220. [2022-12-14 10:13:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 3.857593510590356) internal successors, (8560), 2219 states have internal predecessors, (8560), 0 states have call successors, (0), 0 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 10:13:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 8560 transitions. [2022-12-14 10:13:41,465 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 8560 transitions. Word has length 25 [2022-12-14 10:13:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:13:41,465 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 8560 transitions. [2022-12-14 10:13:41,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:13:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 8560 transitions. [2022-12-14 10:13:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:13:41,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:13:41,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:13:41,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 10:13:41,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:13:41,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:13:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:13:41,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1531785149, now seen corresponding path program 5 times [2022-12-14 10:13:41,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:13:41,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446485753] [2022-12-14 10:13:41,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:13:41,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:13:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:13:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:13:44,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:13:44,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446485753] [2022-12-14 10:13:44,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446485753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:13:44,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421034163] [2022-12-14 10:13:44,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:13:44,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:13:44,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:13:44,549 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:13:44,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:13:44,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:13:44,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:13:44,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:13:44,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:13:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:13:45,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:13:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:13:48,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421034163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:13:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309662794] [2022-12-14 10:13:48,055 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 10:13:48,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:13:48,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-12-14 10:13:48,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990816541] [2022-12-14 10:13:48,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:13:48,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 10:13:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:13:48,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 10:13:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:13:48,057 INFO L87 Difference]: Start difference. First operand 2220 states and 8560 transitions. Second operand has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:14:48,336 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 222 DAG size of output: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:14:56,489 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 222 DAG size of output: 181 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:15:05,767 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 231 DAG size of output: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:15:22,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 10:16:32,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 10:16:58,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 10:17:23,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 10:18:42,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 10:18:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:42,419 INFO L93 Difference]: Finished difference Result 7216 states and 25270 transitions. [2022-12-14 10:18:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-12-14 10:18:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 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 25 [2022-12-14 10:18:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:42,433 INFO L225 Difference]: With dead ends: 7216 [2022-12-14 10:18:42,433 INFO L226 Difference]: Without dead ends: 6628 [2022-12-14 10:18:42,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22231 ImplicationChecksByTransitivity, 259.6s TimeCoverageRelationStatistics Valid=7894, Invalid=45233, Unknown=3, NotChecked=0, Total=53130 [2022-12-14 10:18:42,437 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1048 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5202 mSolverCounterSat, 276 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 5202 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:42,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 0 Invalid, 5481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 5202 Invalid, 3 Unknown, 0 Unchecked, 37.3s Time] [2022-12-14 10:18:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2022-12-14 10:18:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 2560. [2022-12-14 10:18:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2559 states have (on average 3.881203595154357) internal successors, (9932), 2559 states have internal predecessors, (9932), 0 states have call successors, (0), 0 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 10:18:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 9932 transitions. [2022-12-14 10:18:42,526 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 9932 transitions. Word has length 25 [2022-12-14 10:18:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:42,526 INFO L495 AbstractCegarLoop]: Abstraction has 2560 states and 9932 transitions. [2022-12-14 10:18:42,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:18:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 9932 transitions. [2022-12-14 10:18:42,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:18:42,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:42,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:18:42,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:18:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 10:18:42,733 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:18:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash 190491993, now seen corresponding path program 3 times [2022-12-14 10:18:42,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:18:42,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821876271] [2022-12-14 10:18:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:42,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:18:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:42,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:18:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821876271] [2022-12-14 10:18:42,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821876271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:18:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808453235] [2022-12-14 10:18:42,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:18:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:42,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:18:42,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:18:42,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:18:42,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:18:42,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:18:42,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:43,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:18:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:43,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808453235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:18:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035429944] [2022-12-14 10:18:43,164 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 10:18:43,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:18:43,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 13 [2022-12-14 10:18:43,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160528437] [2022-12-14 10:18:43,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:18:43,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:18:43,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:18:43,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:18:43,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:18:43,165 INFO L87 Difference]: Start difference. First operand 2560 states and 9932 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 10:18:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:43,627 INFO L93 Difference]: Finished difference Result 3274 states and 12615 transitions. [2022-12-14 10:18:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:18:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 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 25 [2022-12-14 10:18:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:43,634 INFO L225 Difference]: With dead ends: 3274 [2022-12-14 10:18:43,634 INFO L226 Difference]: Without dead ends: 3272 [2022-12-14 10:18:43,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:18:43,634 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:43,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:18:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-12-14 10:18:43,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2304. [2022-12-14 10:18:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 3.8671298306556667) internal successors, (8906), 2303 states have internal predecessors, (8906), 0 states have call successors, (0), 0 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 10:18:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 8906 transitions. [2022-12-14 10:18:43,680 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 8906 transitions. Word has length 25 [2022-12-14 10:18:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:43,680 INFO L495 AbstractCegarLoop]: Abstraction has 2304 states and 8906 transitions. [2022-12-14 10:18:43,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 10:18:43,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 8906 transitions. [2022-12-14 10:18:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:18:43,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:43,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:18:43,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 10:18:43,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 10:18:43,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:18:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash 584620763, now seen corresponding path program 1 times [2022-12-14 10:18:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:18:43,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349721139] [2022-12-14 10:18:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:43,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:18:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:45,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:18:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349721139] [2022-12-14 10:18:45,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349721139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:18:45,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435589102] [2022-12-14 10:18:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:45,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:45,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:18:45,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:18:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:45,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:18:45,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:46,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:18:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:47,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435589102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:18:47,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1536704863] [2022-12-14 10:18:47,049 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 10:18:47,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:18:47,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2022-12-14 10:18:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164752867] [2022-12-14 10:18:47,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:18:47,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:18:47,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:18:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:18:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:18:47,051 INFO L87 Difference]: Start difference. First operand 2304 states and 8906 transitions. Second operand has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:21:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:41,798 INFO L93 Difference]: Finished difference Result 8267 states and 29628 transitions. [2022-12-14 10:21:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2022-12-14 10:21:41,799 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 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 25 [2022-12-14 10:21:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:41,818 INFO L225 Difference]: With dead ends: 8267 [2022-12-14 10:21:41,818 INFO L226 Difference]: Without dead ends: 7480 [2022-12-14 10:21:41,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40504 ImplicationChecksByTransitivity, 160.6s TimeCoverageRelationStatistics Valid=13292, Invalid=83118, Unknown=0, NotChecked=0, Total=96410 [2022-12-14 10:21:41,823 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1270 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5494 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 5494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:41,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 0 Invalid, 5754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 5494 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2022-12-14 10:21:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7480 states. [2022-12-14 10:21:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7480 to 2610. [2022-12-14 10:21:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2609 states have (on average 3.9091605979302413) internal successors, (10199), 2609 states have internal predecessors, (10199), 0 states have call successors, (0), 0 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 10:21:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 10199 transitions. [2022-12-14 10:21:41,906 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 10199 transitions. Word has length 25 [2022-12-14 10:21:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:41,906 INFO L495 AbstractCegarLoop]: Abstraction has 2610 states and 10199 transitions. [2022-12-14 10:21:41,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:21:41,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 10199 transitions. [2022-12-14 10:21:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:21:41,916 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:41,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:41,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:21:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:42,118 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-14 10:21:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash -944046595, now seen corresponding path program 6 times [2022-12-14 10:21:42,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:42,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153969282] [2022-12-14 10:21:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:42,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:21:43,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153969282] [2022-12-14 10:21:43,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153969282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549097185] [2022-12-14 10:21:43,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:43,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:43,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:43,894 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:43,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52da895-7492-4893-a63d-1e0b92cb07e2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:21:44,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:44,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 10:21:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:21:44,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:21:47,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549097185] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:47,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800161235] [2022-12-14 10:21:47,637 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 10:21:47,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2022-12-14 10:21:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469532115] [2022-12-14 10:21:47,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:47,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:21:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:21:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:21:47,639 INFO L87 Difference]: Start difference. First operand 2610 states and 10199 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)