./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/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_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/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_edd3d27d-dadf-45f5-aaba-d38471433b0d/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 5eef73b6b2655059556d731e3a5babc181132142f2417a2cf863165dd8efda84 --- 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 11:13:34,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:13:34,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:13:34,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:13:34,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:13:34,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:13:34,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:13:34,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:13:34,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:13:34,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:13:34,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:13:34,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:13:34,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:13:34,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:13:34,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:13:34,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:13:34,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:13:34,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:13:34,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:13:34,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:13:34,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:13:34,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:13:34,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:13:34,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:13:34,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:13:34,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:13:34,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:13:34,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:13:34,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:13:34,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:13:34,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:13:34,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:13:34,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:13:34,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:13:34,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:13:34,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:13:34,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:13:34,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:13:34,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:13:34,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:13:34,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:13:34,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:13:34,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:13:34,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:13:34,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:13:34,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:13:34,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:13:34,849 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:13:34,849 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:13:34,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:13:34,850 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:13:34,850 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:13:34,850 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:13:34,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:13:34,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:13:34,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:13:34,851 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:13:34,851 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:13:34,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:13:34,851 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:13:34,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:13:34,852 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:13:34,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:13:34,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:13:34,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:13:34,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:13:34,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:13:34,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:13:34,853 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:13:34,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:13:34,853 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:13:34,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:13:34,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:13:34,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:13:34,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:13:34,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:13:34,854 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:13:34,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:13:34,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:13:34,854 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:13:34,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:13:34,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:13:34,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:13:34,854 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_edd3d27d-dadf-45f5-aaba-d38471433b0d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5eef73b6b2655059556d731e3a5babc181132142f2417a2cf863165dd8efda84 [2022-12-14 11:13:35,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:13:35,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:13:35,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:13:35,053 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:13:35,053 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:13:35,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i [2022-12-14 11:13:37,686 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:13:37,894 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:13:37,894 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/sv-benchmarks/c/pthread-ext/40_barrier_vf.i [2022-12-14 11:13:37,911 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/data/f133ae278/2e41283fe63c42bb994398b8765ebd14/FLAG44f9767f7 [2022-12-14 11:13:37,921 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/data/f133ae278/2e41283fe63c42bb994398b8765ebd14 [2022-12-14 11:13:37,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:13:37,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:13:37,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:13:37,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:13:37,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:13:37,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:13:37" (1/1) ... [2022-12-14 11:13:37,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dcfc4b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:37, skipping insertion in model container [2022-12-14 11:13:37,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:13:37" (1/1) ... [2022-12-14 11:13:37,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:13:37,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:13:38,120 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 11:13:38,208 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:13:38,208 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:13:38,209 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:13:38,209 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:13:38,209 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:13:38,210 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:13:38,211 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_edd3d27d-dadf-45f5-aaba-d38471433b0d/sv-benchmarks/c/pthread-ext/40_barrier_vf.i[31163,31176] [2022-12-14 11:13:38,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:13:38,224 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:13:38,235 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-14 11:13:38,248 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:13:38,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:13:38,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:13:38,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:13:38,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:13:38,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:13:38,250 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_edd3d27d-dadf-45f5-aaba-d38471433b0d/sv-benchmarks/c/pthread-ext/40_barrier_vf.i[31163,31176] [2022-12-14 11:13:38,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:13:38,274 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:13:38,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38 WrapperNode [2022-12-14 11:13:38,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:13:38,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:13:38,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:13:38,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:13:38,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,303 INFO L138 Inliner]: procedures = 174, calls = 25, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 78 [2022-12-14 11:13:38,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:13:38,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:13:38,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:13:38,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:13:38,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:13:38,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:13:38,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:13:38,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:13:38,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (1/1) ... [2022-12-14 11:13:38,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:13:38,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:38,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:13:38,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:13:38,371 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-14 11:13:38,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-14 11:13:38,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:13:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 11:13:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:13:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:13:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:13:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:13:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 11:13:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:13:38,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:13:38,373 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 11:13:38,467 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:13:38,468 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:13:38,582 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:13:38,642 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:13:38,642 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:13:38,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:13:38 BoogieIcfgContainer [2022-12-14 11:13:38,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:13:38,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:13:38,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:13:38,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:13:38,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:13:37" (1/3) ... [2022-12-14 11:13:38,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5605aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:13:38, skipping insertion in model container [2022-12-14 11:13:38,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:38" (2/3) ... [2022-12-14 11:13:38,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5605aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:13:38, skipping insertion in model container [2022-12-14 11:13:38,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:13:38" (3/3) ... [2022-12-14 11:13:38,650 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf.i [2022-12-14 11:13:38,656 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 11:13:38,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:13:38,664 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:13:38,664 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 11:13:38,702 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 11:13:38,724 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:13:38,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 54 transitions, 113 flow [2022-12-14 11:13:38,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 54 transitions, 113 flow [2022-12-14 11:13:38,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 54 transitions, 113 flow [2022-12-14 11:13:38,764 INFO L130 PetriNetUnfolder]: 4/65 cut-off events. [2022-12-14 11:13:38,764 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 11:13:38,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 65 events. 4/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 36. Up to 4 conditions per place. [2022-12-14 11:13:38,768 INFO L119 LiptonReduction]: Number of co-enabled transitions 644 [2022-12-14 11:13:40,365 INFO L134 LiptonReduction]: Checked pairs total: 574 [2022-12-14 11:13:40,366 INFO L136 LiptonReduction]: Total number of compositions: 55 [2022-12-14 11:13:40,373 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 8 transitions, 21 flow [2022-12-14 11:13:40,383 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 11:13:40,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:13:40,401 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;@44849d4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:13:40,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-14 11:13:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 11:13:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 11:13:40,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:40,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 11:13:40,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:40,410 INFO L85 PathProgramCache]: Analyzing trace with hash 10767057, now seen corresponding path program 1 times [2022-12-14 11:13:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:40,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299662788] [2022-12-14 11:13:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:40,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:40,756 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 11:13:40,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299662788] [2022-12-14 11:13:40,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299662788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:40,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:13:40,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:13:40,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42280660] [2022-12-14 11:13:40,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:40,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:13:40,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:40,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:13:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:13:40,788 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 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 11:13:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:40,805 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2022-12-14 11:13:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:13:40,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 11:13:40,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:40,814 INFO L225 Difference]: With dead ends: 7 [2022-12-14 11:13:40,814 INFO L226 Difference]: Without dead ends: 7 [2022-12-14 11:13:40,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:13:40,818 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:40,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:13:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-12-14 11:13:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-12-14 11:13:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:13:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-12-14 11:13:40,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 4 [2022-12-14 11:13:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:40,845 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-12-14 11:13:40,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 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 11:13:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-12-14 11:13:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:13:40,846 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:40,846 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 11:13:40,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:13:40,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1757172020, now seen corresponding path program 1 times [2022-12-14 11:13:40,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:40,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350366164] [2022-12-14 11:13:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:13:40,859 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:13:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:13:40,883 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 11:13:40,883 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:13:40,885 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-14 11:13:40,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-14 11:13:40,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-14 11:13:40,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:13:40,890 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-14 11:13:40,891 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 11:13:40,891 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 11:13:40,907 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 11:13:40,909 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:13:40,910 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 78 transitions, 168 flow [2022-12-14 11:13:40,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 78 transitions, 168 flow [2022-12-14 11:13:40,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 78 transitions, 168 flow [2022-12-14 11:13:40,932 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2022-12-14 11:13:40,933 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 11:13:40,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 102 events. 7/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 191 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 66. Up to 6 conditions per place. [2022-12-14 11:13:40,937 INFO L119 LiptonReduction]: Number of co-enabled transitions 2392 [2022-12-14 11:13:41,692 INFO L134 LiptonReduction]: Checked pairs total: 8484 [2022-12-14 11:13:41,693 INFO L136 LiptonReduction]: Total number of compositions: 53 [2022-12-14 11:13:41,694 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 36 transitions, 84 flow [2022-12-14 11:13:41,757 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1247 states, 1239 states have (on average 2.800645682001614) internal successors, (3470), 1246 states have internal predecessors, (3470), 0 states have call successors, (0), 0 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 11:13:41,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:13:41,760 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;@44849d4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:13:41,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 11:13:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 1247 states, 1239 states have (on average 2.800645682001614) internal successors, (3470), 1246 states have internal predecessors, (3470), 0 states have call successors, (0), 0 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 11:13:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:13:41,767 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:41,767 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 11:13:41,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-14 11:13:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1262456893, now seen corresponding path program 1 times [2022-12-14 11:13:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:41,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118393241] [2022-12-14 11:13:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:13:41,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:13:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:13:41,786 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 11:13:41,786 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:13:41,786 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-14 11:13:41,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-14 11:13:41,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-14 11:13:41,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-14 11:13:41,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:13:41,787 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 11:13:41,787 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 11:13:41,787 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 11:13:41,804 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 11:13:41,805 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:13:41,806 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 102 transitions, 225 flow [2022-12-14 11:13:41,806 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 102 transitions, 225 flow [2022-12-14 11:13:41,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 102 transitions, 225 flow [2022-12-14 11:13:41,822 INFO L130 PetriNetUnfolder]: 10/139 cut-off events. [2022-12-14 11:13:41,822 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 11:13:41,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 139 events. 10/139 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 314 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 106. Up to 8 conditions per place. [2022-12-14 11:13:41,825 INFO L119 LiptonReduction]: Number of co-enabled transitions 5244 [2022-12-14 11:13:42,765 INFO L134 LiptonReduction]: Checked pairs total: 21473 [2022-12-14 11:13:42,765 INFO L136 LiptonReduction]: Total number of compositions: 66 [2022-12-14 11:13:42,766 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 51 transitions, 123 flow [2022-12-14 11:13:43,262 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 17514 states, 17495 states have (on average 3.78313803943984) internal successors, (66186), 17513 states have internal predecessors, (66186), 0 states have call successors, (0), 0 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 11:13:43,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:13:43,265 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;@44849d4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:13:43,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-14 11:13:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 17514 states, 17495 states have (on average 3.78313803943984) internal successors, (66186), 17513 states have internal predecessors, (66186), 0 states have call successors, (0), 0 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 11:13:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:13:43,302 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:43,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:43,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 11:13:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:43,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1753986205, now seen corresponding path program 1 times [2022-12-14 11:13:43,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:43,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245188100] [2022-12-14 11:13:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:43,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:43,422 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 11:13:43,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:43,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245188100] [2022-12-14 11:13:43,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245188100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:43,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:13:43,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:13:43,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016997161] [2022-12-14 11:13:43,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:43,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:13:43,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:43,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:13:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:13:43,447 INFO L87 Difference]: Start difference. First operand has 17514 states, 17495 states have (on average 3.78313803943984) internal successors, (66186), 17513 states have internal predecessors, (66186), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 11:13:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:43,951 INFO L93 Difference]: Finished difference Result 26798 states and 96709 transitions. [2022-12-14 11:13:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:13:43,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-12-14 11:13:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:44,226 INFO L225 Difference]: With dead ends: 26798 [2022-12-14 11:13:44,226 INFO L226 Difference]: Without dead ends: 26798 [2022-12-14 11:13:44,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:13:44,227 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 159 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:44,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 111 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:13:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26798 states. [2022-12-14 11:13:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26798 to 15011. [2022-12-14 11:13:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15011 states, 15010 states have (on average 3.705862758161226) internal successors, (55625), 15010 states have internal predecessors, (55625), 0 states have call successors, (0), 0 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 11:13:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15011 states to 15011 states and 55625 transitions. [2022-12-14 11:13:45,060 INFO L78 Accepts]: Start accepts. Automaton has 15011 states and 55625 transitions. Word has length 11 [2022-12-14 11:13:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:45,061 INFO L495 AbstractCegarLoop]: Abstraction has 15011 states and 55625 transitions. [2022-12-14 11:13:45,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 11:13:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15011 states and 55625 transitions. [2022-12-14 11:13:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:13:45,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:45,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:45,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:13:45,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 11:13:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1036520058, now seen corresponding path program 1 times [2022-12-14 11:13:45,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97000290] [2022-12-14 11:13:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:45,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:45,197 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 11:13:45,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:45,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97000290] [2022-12-14 11:13:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97000290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:45,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:13:45,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:13:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717103997] [2022-12-14 11:13:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:45,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:13:45,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:13:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:13:45,200 INFO L87 Difference]: Start difference. First operand 15011 states and 55625 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 11:13:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:45,487 INFO L93 Difference]: Finished difference Result 14587 states and 51072 transitions. [2022-12-14 11:13:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:13:45,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-12-14 11:13:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:45,566 INFO L225 Difference]: With dead ends: 14587 [2022-12-14 11:13:45,566 INFO L226 Difference]: Without dead ends: 14587 [2022-12-14 11:13:45,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:13:45,567 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:45,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 38 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:13:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14587 states. [2022-12-14 11:13:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14587 to 13582. [2022-12-14 11:13:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13582 states, 13577 states have (on average 3.524563600206231) internal successors, (47853), 13581 states have internal predecessors, (47853), 0 states have call successors, (0), 0 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 11:13:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13582 states to 13582 states and 47853 transitions. [2022-12-14 11:13:45,955 INFO L78 Accepts]: Start accepts. Automaton has 13582 states and 47853 transitions. Word has length 13 [2022-12-14 11:13:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:45,956 INFO L495 AbstractCegarLoop]: Abstraction has 13582 states and 47853 transitions. [2022-12-14 11:13:45,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 11:13:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 13582 states and 47853 transitions. [2022-12-14 11:13:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 11:13:45,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:45,957 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 11:13:45,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:13:45,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 11:13:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash -746128377, now seen corresponding path program 1 times [2022-12-14 11:13:45,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:45,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694295855] [2022-12-14 11:13:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:45,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:13:45,969 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:13:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:13:45,979 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 11:13:45,979 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:13:45,979 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-14 11:13:45,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-14 11:13:45,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-14 11:13:45,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-14 11:13:45,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-14 11:13:45,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:13:45,981 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 11:13:45,981 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 11:13:45,981 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-14 11:13:45,998 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 11:13:46,000 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:13:46,001 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 126 transitions, 284 flow [2022-12-14 11:13:46,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 126 transitions, 284 flow [2022-12-14 11:13:46,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 126 transitions, 284 flow [2022-12-14 11:13:46,028 INFO L130 PetriNetUnfolder]: 13/176 cut-off events. [2022-12-14 11:13:46,028 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-14 11:13:46,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 176 events. 13/176 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 455 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 147. Up to 10 conditions per place. [2022-12-14 11:13:46,036 INFO L119 LiptonReduction]: Number of co-enabled transitions 9200 [2022-12-14 11:13:47,046 INFO L134 LiptonReduction]: Checked pairs total: 44229 [2022-12-14 11:13:47,047 INFO L136 LiptonReduction]: Total number of compositions: 79 [2022-12-14 11:13:47,048 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 66 transitions, 164 flow [2022-12-14 11:13:52,443 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 245265 states, 245223 states have (on average 4.779376322775596) internal successors, (1172013), 245264 states have internal predecessors, (1172013), 0 states have call successors, (0), 0 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 11:13:52,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:13:52,444 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;@44849d4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:13:52,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 11:13:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 245265 states, 245223 states have (on average 4.779376322775596) internal successors, (1172013), 245264 states have internal predecessors, (1172013), 0 states have call successors, (0), 0 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 11:13:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:13:52,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:52,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:52,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 11:13:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1812769031, now seen corresponding path program 1 times [2022-12-14 11:13:52,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:52,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061658572] [2022-12-14 11:13:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:52,813 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 11:13:52,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:52,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061658572] [2022-12-14 11:13:52,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061658572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:52,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:13:52,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:13:52,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936809244] [2022-12-14 11:13:52,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:52,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:13:52,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:52,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:13:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:13:53,131 INFO L87 Difference]: Start difference. First operand has 245265 states, 245223 states have (on average 4.779376322775596) internal successors, (1172013), 245264 states have internal predecessors, (1172013), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 11:13:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:57,282 INFO L93 Difference]: Finished difference Result 377116 states and 1718869 transitions. [2022-12-14 11:13:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:13:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-12-14 11:13:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:00,197 INFO L225 Difference]: With dead ends: 377116 [2022-12-14 11:14:00,198 INFO L226 Difference]: Without dead ends: 377116 [2022-12-14 11:14:00,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:14:00,199 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 239 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:00,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 138 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:14:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377116 states. [2022-12-14 11:14:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377116 to 208755. [2022-12-14 11:14:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208755 states, 208754 states have (on average 4.6783534686760495) internal successors, (976625), 208754 states have internal predecessors, (976625), 0 states have call successors, (0), 0 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 11:14:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208755 states to 208755 states and 976625 transitions. [2022-12-14 11:14:09,675 INFO L78 Accepts]: Start accepts. Automaton has 208755 states and 976625 transitions. Word has length 11 [2022-12-14 11:14:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:09,675 INFO L495 AbstractCegarLoop]: Abstraction has 208755 states and 976625 transitions. [2022-12-14 11:14:09,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 11:14:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 208755 states and 976625 transitions. [2022-12-14 11:14:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:14:09,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:09,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:09,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:14:09,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 11:14:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:09,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1692239876, now seen corresponding path program 1 times [2022-12-14 11:14:09,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:09,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119490086] [2022-12-14 11:14:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:09,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:09,727 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 11:14:09,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:09,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119490086] [2022-12-14 11:14:09,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119490086] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:09,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:14:09,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:14:09,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422207712] [2022-12-14 11:14:09,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:09,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:14:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:09,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:14:09,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:14:09,729 INFO L87 Difference]: Start difference. First operand 208755 states and 976625 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 11:14:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:11,794 INFO L93 Difference]: Finished difference Result 240459 states and 1067076 transitions. [2022-12-14 11:14:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:14:11,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-12-14 11:14:11,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:13,516 INFO L225 Difference]: With dead ends: 240459 [2022-12-14 11:14:13,517 INFO L226 Difference]: Without dead ends: 240459 [2022-12-14 11:14:13,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:14:13,517 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:13,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:14:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240459 states. [2022-12-14 11:14:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240459 to 231184. [2022-12-14 11:14:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231184 states, 231172 states have (on average 4.45069472081394) internal successors, (1028876), 231183 states have internal predecessors, (1028876), 0 states have call successors, (0), 0 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 11:14:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231184 states to 231184 states and 1028876 transitions. [2022-12-14 11:14:21,485 INFO L78 Accepts]: Start accepts. Automaton has 231184 states and 1028876 transitions. Word has length 13 [2022-12-14 11:14:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:21,485 INFO L495 AbstractCegarLoop]: Abstraction has 231184 states and 1028876 transitions. [2022-12-14 11:14:21,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 11:14:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 231184 states and 1028876 transitions. [2022-12-14 11:14:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 11:14:21,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:21,486 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:21,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:14:21,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 11:14:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash -783494522, now seen corresponding path program 1 times [2022-12-14 11:14:21,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:21,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971864325] [2022-12-14 11:14:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:21,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:14:21,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:21,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971864325] [2022-12-14 11:14:21,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971864325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:21,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:14:21,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:14:21,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709845429] [2022-12-14 11:14:21,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:21,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:14:21,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:14:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:14:21,549 INFO L87 Difference]: Start difference. First operand 231184 states and 1028876 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 11:14:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:25,324 INFO L93 Difference]: Finished difference Result 423016 states and 1827037 transitions. [2022-12-14 11:14:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:14:25,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 15 [2022-12-14 11:14:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:28,425 INFO L225 Difference]: With dead ends: 423016 [2022-12-14 11:14:28,426 INFO L226 Difference]: Without dead ends: 423016 [2022-12-14 11:14:28,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:14:28,426 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 183 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:28,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 127 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:14:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423016 states. [2022-12-14 11:14:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423016 to 258575. [2022-12-14 11:14:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258575 states, 258563 states have (on average 4.443570812529249) internal successors, (1148943), 258574 states have internal predecessors, (1148943), 0 states have call successors, (0), 0 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 11:14:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258575 states to 258575 states and 1148943 transitions. [2022-12-14 11:14:39,508 INFO L78 Accepts]: Start accepts. Automaton has 258575 states and 1148943 transitions. Word has length 15 [2022-12-14 11:14:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:39,508 INFO L495 AbstractCegarLoop]: Abstraction has 258575 states and 1148943 transitions. [2022-12-14 11:14:39,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 11:14:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 258575 states and 1148943 transitions. [2022-12-14 11:14:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:14:39,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:39,510 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:39,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 11:14:39,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 11:14:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1824467817, now seen corresponding path program 1 times [2022-12-14 11:14:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:39,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423679320] [2022-12-14 11:14:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:39,585 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 11:14:39,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:14:39,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423679320] [2022-12-14 11:14:39,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423679320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:14:39,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038864616] [2022-12-14 11:14:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:39,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:14:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:14:39,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:14:39,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:14:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:14:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:14:39,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:14:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:14:39,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:14:39,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038864616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:14:39,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:14:39,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-14 11:14:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501659306] [2022-12-14 11:14:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:14:39,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:14:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:14:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:14:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:14:39,681 INFO L87 Difference]: Start difference. First operand 258575 states and 1148943 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 11:14:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:14:40,019 INFO L93 Difference]: Finished difference Result 46197 states and 151655 transitions. [2022-12-14 11:14:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:14:40,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-12-14 11:14:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:14:40,348 INFO L225 Difference]: With dead ends: 46197 [2022-12-14 11:14:40,348 INFO L226 Difference]: Without dead ends: 46197 [2022-12-14 11:14:40,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:14:40,349 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:14:40,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 35 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:14:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46197 states. [2022-12-14 11:14:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46197 to 45797. [2022-12-14 11:14:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45797 states, 45785 states have (on average 3.2869935568417605) internal successors, (150495), 45796 states have internal predecessors, (150495), 0 states have call successors, (0), 0 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 11:14:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45797 states to 45797 states and 150495 transitions. [2022-12-14 11:14:41,190 INFO L78 Accepts]: Start accepts. Automaton has 45797 states and 150495 transitions. Word has length 18 [2022-12-14 11:14:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:14:41,191 INFO L495 AbstractCegarLoop]: Abstraction has 45797 states and 150495 transitions. [2022-12-14 11:14:41,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 11:14:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45797 states and 150495 transitions. [2022-12-14 11:14:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 11:14:41,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:14:41,192 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 11:14:41,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:14:41,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd3d27d-dadf-45f5-aaba-d38471433b0d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:14:41,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 11:14:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:14:41,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1821662674, now seen corresponding path program 1 times [2022-12-14 11:14:41,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:14:41,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035288588] [2022-12-14 11:14:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:14:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:14:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:14:41,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:14:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:14:41,415 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 11:14:41,415 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:14:41,415 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-14 11:14:41,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-14 11:14:41,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-14 11:14:41,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-14 11:14:41,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-14 11:14:41,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-14 11:14:41,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 11:14:41,417 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-14 11:14:41,417 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 11:14:41,417 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-14 11:14:41,434 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 11:14:41,435 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:14:41,436 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 150 transitions, 345 flow [2022-12-14 11:14:41,436 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 150 transitions, 345 flow [2022-12-14 11:14:41,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 150 transitions, 345 flow [2022-12-14 11:14:41,586 INFO L130 PetriNetUnfolder]: 16/213 cut-off events. [2022-12-14 11:14:41,587 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-14 11:14:41,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 213 events. 16/213 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 577 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 189. Up to 12 conditions per place. [2022-12-14 11:14:41,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 14260 [2022-12-14 11:14:42,614 INFO L134 LiptonReduction]: Checked pairs total: 63055 [2022-12-14 11:14:42,614 INFO L136 LiptonReduction]: Total number of compositions: 92 [2022-12-14 11:14:42,615 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 81 transitions, 207 flow