./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI --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 53b2835bffc5e46db9e843d7a27e5dc2af58bf47930b3bc6dacf70c618d5bd01 --- 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-5e519f3 [2022-11-03 02:40:44,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:40:44,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:40:44,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:40:44,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:40:44,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:40:44,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:40:44,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:40:44,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:40:44,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:40:44,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:40:44,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:40:44,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:40:44,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:40:44,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:40:44,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:40:44,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:40:44,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:40:44,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:40:44,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:40:44,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:40:44,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:40:44,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:40:44,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:40:44,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:40:44,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:40:44,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:40:44,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:40:44,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:40:44,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:40:44,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:40:44,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:40:44,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:40:44,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:40:44,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:40:44,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:40:44,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:40:44,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:40:44,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:40:44,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:40:44,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:40:44,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:40:45,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:40:45,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:40:45,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:40:45,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:40:45,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:40:45,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:40:45,036 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:40:45,037 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:40:45,037 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:40:45,037 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:40:45,038 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:40:45,038 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:40:45,039 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:40:45,039 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:40:45,039 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:40:45,039 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:40:45,039 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:40:45,040 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:40:45,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:40:45,040 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:40:45,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:40:45,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:40:45,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:40:45,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:40:45,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:40:45,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:40:45,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:40:45,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:40:45,044 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:40:45,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:40:45,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:40:45,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:40:45,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:40:45,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:40:45,045 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:40:45,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:40:45,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:40:45,046 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:40:45,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:40:45,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:40:45,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:40:45,047 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_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53b2835bffc5e46db9e843d7a27e5dc2af58bf47930b3bc6dacf70c618d5bd01 [2022-11-03 02:40:45,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:40:45,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:40:45,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:40:45,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:40:45,386 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:40:45,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c [2022-11-03 02:40:45,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/data/36946528e/8e26b31c0e804ea499b057990b028dbd/FLAG4306ffeb6 [2022-11-03 02:40:46,062 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:40:46,063 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c [2022-11-03 02:40:46,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/data/36946528e/8e26b31c0e804ea499b057990b028dbd/FLAG4306ffeb6 [2022-11-03 02:40:46,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/data/36946528e/8e26b31c0e804ea499b057990b028dbd [2022-11-03 02:40:46,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:40:46,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:40:46,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:40:46,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:40:46,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:40:46,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:40:46" (1/1) ... [2022-11-03 02:40:46,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252c8eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:46, skipping insertion in model container [2022-11-03 02:40:46,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:40:46" (1/1) ... [2022-11-03 02:40:46,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:40:46,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:40:46,703 WARN L230 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_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[911,924] [2022-11-03 02:40:46,802 WARN L230 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_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[8416,8429] [2022-11-03 02:40:46,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:40:46,917 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:40:46,932 WARN L230 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_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[911,924] [2022-11-03 02:40:46,982 WARN L230 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_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[8416,8429] [2022-11-03 02:40:47,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:40:47,035 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:40:47,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47 WrapperNode [2022-11-03 02:40:47,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:40:47,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:40:47,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:40:47,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:40:47,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,109 INFO L138 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 556 [2022-11-03 02:40:47,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:40:47,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:40:47,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:40:47,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:40:47,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:40:47,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:40:47,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:40:47,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:40:47,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (1/1) ... [2022-11-03 02:40:47,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:40:47,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:47,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:40:47,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:40:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:40:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:40:47,283 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:40:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 02:40:47,283 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 02:40:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 02:40:47,283 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 02:40:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 02:40:47,284 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 02:40:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 02:40:47,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 02:40:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 02:40:47,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 02:40:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 02:40:47,285 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 02:40:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 02:40:47,285 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 02:40:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 02:40:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 02:40:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 02:40:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 02:40:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 02:40:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 02:40:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:40:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 02:40:47,287 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 02:40:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 02:40:47,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 02:40:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:40:47,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:40:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 02:40:47,288 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 02:40:47,442 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:40:47,444 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:40:47,996 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-03 02:40:47,997 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-03 02:40:48,102 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:40:48,382 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:40:48,383 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-03 02:40:48,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:40:48 BoogieIcfgContainer [2022-11-03 02:40:48,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:40:48,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:40:48,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:40:48,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:40:48,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:40:46" (1/3) ... [2022-11-03 02:40:48,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ba456c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:40:48, skipping insertion in model container [2022-11-03 02:40:48,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:47" (2/3) ... [2022-11-03 02:40:48,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ba456c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:40:48, skipping insertion in model container [2022-11-03 02:40:48,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:40:48" (3/3) ... [2022-11-03 02:40:48,397 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.03.cil-2.c [2022-11-03 02:40:48,415 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:40:48,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:40:48,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:40:48,498 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;@4dd4bb2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:40:48,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:40:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 118 states have (on average 1.5) internal successors, (177), 124 states have internal predecessors, (177), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-03 02:40:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:40:48,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:48,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:48,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:48,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:48,530 INFO L85 PathProgramCache]: Analyzing trace with hash 995548634, now seen corresponding path program 1 times [2022-11-03 02:40:48,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:48,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736331775] [2022-11-03 02:40:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:48,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:49,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:49,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736331775] [2022-11-03 02:40:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736331775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:49,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:49,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:49,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803928362] [2022-11-03 02:40:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:49,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:49,110 INFO L87 Difference]: Start difference. First operand has 168 states, 118 states have (on average 1.5) internal successors, (177), 124 states have internal predecessors, (177), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:40:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:49,981 INFO L93 Difference]: Finished difference Result 637 states and 962 transitions. [2022-11-03 02:40:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:49,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-03 02:40:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:50,006 INFO L225 Difference]: With dead ends: 637 [2022-11-03 02:40:50,006 INFO L226 Difference]: Without dead ends: 464 [2022-11-03 02:40:50,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:40:50,018 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 651 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:50,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 664 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:40:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-11-03 02:40:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 453. [2022-11-03 02:40:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 332 states have (on average 1.4186746987951808) internal successors, (471), 339 states have internal predecessors, (471), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (106), 77 states have call predecessors, (106), 80 states have call successors, (106) [2022-11-03 02:40:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 659 transitions. [2022-11-03 02:40:50,174 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 659 transitions. Word has length 40 [2022-11-03 02:40:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:50,175 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 659 transitions. [2022-11-03 02:40:50,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:40:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 659 transitions. [2022-11-03 02:40:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:40:50,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:50,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:40:50,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1586164402, now seen corresponding path program 1 times [2022-11-03 02:40:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:50,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170349649] [2022-11-03 02:40:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:50,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:50,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170349649] [2022-11-03 02:40:50,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170349649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:50,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:50,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:40:50,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380745177] [2022-11-03 02:40:50,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:50,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:40:50,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:50,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:40:50,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:40:50,312 INFO L87 Difference]: Start difference. First operand 453 states and 659 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:40:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:50,640 INFO L93 Difference]: Finished difference Result 653 states and 936 transitions. [2022-11-03 02:40:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:40:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-03 02:40:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:50,650 INFO L225 Difference]: With dead ends: 653 [2022-11-03 02:40:50,650 INFO L226 Difference]: Without dead ends: 582 [2022-11-03 02:40:50,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:40:50,655 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 287 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:50,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 447 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:40:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-11-03 02:40:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 571. [2022-11-03 02:40:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 416 states have (on average 1.4014423076923077) internal successors, (583), 423 states have internal predecessors, (583), 102 states have call successors, (102), 52 states have call predecessors, (102), 51 states have return successors, (129), 97 states have call predecessors, (129), 100 states have call successors, (129) [2022-11-03 02:40:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 814 transitions. [2022-11-03 02:40:50,766 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 814 transitions. Word has length 44 [2022-11-03 02:40:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:50,767 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 814 transitions. [2022-11-03 02:40:50,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:40:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 814 transitions. [2022-11-03 02:40:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:40:50,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:50,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:50,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:40:50,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:50,781 INFO L85 PathProgramCache]: Analyzing trace with hash 106760539, now seen corresponding path program 1 times [2022-11-03 02:40:50,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:50,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004342774] [2022-11-03 02:40:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:50,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:50,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004342774] [2022-11-03 02:40:50,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004342774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:50,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:50,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:40:50,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133642245] [2022-11-03 02:40:50,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:50,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:40:50,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:40:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:50,953 INFO L87 Difference]: Start difference. First operand 571 states and 814 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:40:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:51,772 INFO L93 Difference]: Finished difference Result 1108 states and 1537 transitions. [2022-11-03 02:40:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 02:40:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:51,777 INFO L225 Difference]: With dead ends: 1108 [2022-11-03 02:40:51,777 INFO L226 Difference]: Without dead ends: 642 [2022-11-03 02:40:51,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:40:51,786 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 686 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:51,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 837 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:40:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-11-03 02:40:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 557. [2022-11-03 02:40:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 402 states have (on average 1.3681592039800996) internal successors, (550), 409 states have internal predecessors, (550), 102 states have call successors, (102), 52 states have call predecessors, (102), 51 states have return successors, (126), 97 states have call predecessors, (126), 100 states have call successors, (126) [2022-11-03 02:40:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 778 transitions. [2022-11-03 02:40:51,866 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 778 transitions. Word has length 45 [2022-11-03 02:40:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:51,867 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 778 transitions. [2022-11-03 02:40:51,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:40:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 778 transitions. [2022-11-03 02:40:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:40:51,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:51,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:51,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:40:51,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1623348331, now seen corresponding path program 1 times [2022-11-03 02:40:51,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:51,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126851291] [2022-11-03 02:40:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:51,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:51,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126851291] [2022-11-03 02:40:51,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126851291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:51,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:51,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:40:51,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829965802] [2022-11-03 02:40:51,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:51,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:40:51,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:51,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:40:51,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:51,994 INFO L87 Difference]: Start difference. First operand 557 states and 778 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:40:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:52,683 INFO L93 Difference]: Finished difference Result 1023 states and 1386 transitions. [2022-11-03 02:40:52,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:40:52,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2022-11-03 02:40:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:52,688 INFO L225 Difference]: With dead ends: 1023 [2022-11-03 02:40:52,689 INFO L226 Difference]: Without dead ends: 846 [2022-11-03 02:40:52,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:40:52,690 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 600 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:52,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 778 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:40:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-03 02:40:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 821. [2022-11-03 02:40:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 583 states have (on average 1.3190394511149228) internal successors, (769), 590 states have internal predecessors, (769), 151 states have call successors, (151), 86 states have call predecessors, (151), 85 states have return successors, (192), 146 states have call predecessors, (192), 149 states have call successors, (192) [2022-11-03 02:40:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1112 transitions. [2022-11-03 02:40:52,784 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1112 transitions. Word has length 46 [2022-11-03 02:40:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:52,784 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1112 transitions. [2022-11-03 02:40:52,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:40:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1112 transitions. [2022-11-03 02:40:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:40:52,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:52,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:52,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:40:52,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1396989782, now seen corresponding path program 1 times [2022-11-03 02:40:52,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:52,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893042113] [2022-11-03 02:40:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:52,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:52,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:52,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893042113] [2022-11-03 02:40:52,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893042113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:52,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:52,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:40:52,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410255327] [2022-11-03 02:40:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:52,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:52,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:52,833 INFO L87 Difference]: Start difference. First operand 821 states and 1112 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:40:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:52,958 INFO L93 Difference]: Finished difference Result 822 states and 1113 transitions. [2022-11-03 02:40:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2022-11-03 02:40:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:52,961 INFO L225 Difference]: With dead ends: 822 [2022-11-03 02:40:52,962 INFO L226 Difference]: Without dead ends: 378 [2022-11-03 02:40:52,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:52,964 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 192 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:52,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 173 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-03 02:40:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-03 02:40:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 281 states have (on average 1.4128113879003559) internal successors, (397), 285 states have internal predecessors, (397), 66 states have call successors, (66), 30 states have call predecessors, (66), 30 states have return successors, (92), 63 states have call predecessors, (92), 66 states have call successors, (92) [2022-11-03 02:40:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 555 transitions. [2022-11-03 02:40:53,008 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 555 transitions. Word has length 50 [2022-11-03 02:40:53,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:53,008 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 555 transitions. [2022-11-03 02:40:53,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:40:53,008 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 555 transitions. [2022-11-03 02:40:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:40:53,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:53,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:53,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:40:53,011 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1845259145, now seen corresponding path program 1 times [2022-11-03 02:40:53,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904668693] [2022-11-03 02:40:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:53,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:40:53,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:53,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904668693] [2022-11-03 02:40:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904668693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:53,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865144080] [2022-11-03 02:40:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:53,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:53,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:53,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:53,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:40:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:40:53,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:40:53,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:53,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865144080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:53,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:40:53,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:40:53,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679291249] [2022-11-03 02:40:53,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:53,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:53,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:53,375 INFO L87 Difference]: Start difference. First operand 378 states and 555 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:40:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:53,550 INFO L93 Difference]: Finished difference Result 1106 states and 1666 transitions. [2022-11-03 02:40:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:53,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-03 02:40:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:53,555 INFO L225 Difference]: With dead ends: 1106 [2022-11-03 02:40:53,556 INFO L226 Difference]: Without dead ends: 734 [2022-11-03 02:40:53,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:53,561 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 97 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:53,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 203 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:40:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-11-03 02:40:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 727. [2022-11-03 02:40:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 543 states have (on average 1.3996316758747698) internal successors, (760), 550 states have internal predecessors, (760), 123 states have call successors, (123), 60 states have call predecessors, (123), 60 states have return successors, (171), 117 states have call predecessors, (171), 123 states have call successors, (171) [2022-11-03 02:40:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1054 transitions. [2022-11-03 02:40:53,668 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1054 transitions. Word has length 73 [2022-11-03 02:40:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:53,668 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 1054 transitions. [2022-11-03 02:40:53,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:40:53,669 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1054 transitions. [2022-11-03 02:40:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:40:53,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:53,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:53,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:53,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:40:53,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1339056711, now seen corresponding path program 1 times [2022-11-03 02:40:53,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:53,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987101765] [2022-11-03 02:40:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:53,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:40:54,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987101765] [2022-11-03 02:40:54,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987101765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:54,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:54,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:40:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408926733] [2022-11-03 02:40:54,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:40:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:40:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:54,291 INFO L87 Difference]: Start difference. First operand 727 states and 1054 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:40:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:54,704 INFO L93 Difference]: Finished difference Result 1941 states and 2865 transitions. [2022-11-03 02:40:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:40:54,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-03 02:40:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:54,712 INFO L225 Difference]: With dead ends: 1941 [2022-11-03 02:40:54,713 INFO L226 Difference]: Without dead ends: 1221 [2022-11-03 02:40:54,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:40:54,716 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 290 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:54,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 392 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:40:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-11-03 02:40:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1135. [2022-11-03 02:40:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 846 states have (on average 1.3829787234042554) internal successors, (1170), 857 states have internal predecessors, (1170), 192 states have call successors, (192), 96 states have call predecessors, (192), 96 states have return successors, (273), 182 states have call predecessors, (273), 192 states have call successors, (273) [2022-11-03 02:40:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1635 transitions. [2022-11-03 02:40:54,861 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1635 transitions. Word has length 73 [2022-11-03 02:40:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:54,861 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1635 transitions. [2022-11-03 02:40:54,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:40:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1635 transitions. [2022-11-03 02:40:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:40:54,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:54,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:54,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:40:54,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1357488447, now seen corresponding path program 1 times [2022-11-03 02:40:54,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:54,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250348648] [2022-11-03 02:40:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:40:54,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:54,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250348648] [2022-11-03 02:40:54,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250348648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:54,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:54,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:40:54,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141441132] [2022-11-03 02:40:54,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:54,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:54,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:54,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:54,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:54,943 INFO L87 Difference]: Start difference. First operand 1135 states and 1635 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:40:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:55,157 INFO L93 Difference]: Finished difference Result 2365 states and 3464 transitions. [2022-11-03 02:40:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-03 02:40:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:55,168 INFO L225 Difference]: With dead ends: 2365 [2022-11-03 02:40:55,168 INFO L226 Difference]: Without dead ends: 1379 [2022-11-03 02:40:55,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:55,173 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 46 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:55,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 255 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-03 02:40:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1254. [2022-11-03 02:40:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 953 states have (on average 1.4081846799580273) internal successors, (1342), 964 states have internal predecessors, (1342), 198 states have call successors, (198), 102 states have call predecessors, (198), 102 states have return successors, (279), 188 states have call predecessors, (279), 198 states have call successors, (279) [2022-11-03 02:40:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1819 transitions. [2022-11-03 02:40:55,313 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1819 transitions. Word has length 74 [2022-11-03 02:40:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:55,315 INFO L495 AbstractCegarLoop]: Abstraction has 1254 states and 1819 transitions. [2022-11-03 02:40:55,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:40:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1819 transitions. [2022-11-03 02:40:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 02:40:55,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:55,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:55,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:40:55,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2108502666, now seen corresponding path program 1 times [2022-11-03 02:40:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:55,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697420200] [2022-11-03 02:40:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:55,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:40:55,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:55,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697420200] [2022-11-03 02:40:55,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697420200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:55,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:55,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:40:55,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707649024] [2022-11-03 02:40:55,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:55,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:55,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:55,414 INFO L87 Difference]: Start difference. First operand 1254 states and 1819 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:40:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:55,745 INFO L93 Difference]: Finished difference Result 3679 states and 5443 transitions. [2022-11-03 02:40:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-11-03 02:40:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:55,759 INFO L225 Difference]: With dead ends: 3679 [2022-11-03 02:40:55,759 INFO L226 Difference]: Without dead ends: 2431 [2022-11-03 02:40:55,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:55,765 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 92 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:55,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 205 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:40:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2022-11-03 02:40:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2407. [2022-11-03 02:40:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 1826 states have (on average 1.3844468784227821) internal successors, (2528), 1847 states have internal predecessors, (2528), 376 states have call successors, (376), 204 states have call predecessors, (376), 204 states have return successors, (524), 356 states have call predecessors, (524), 376 states have call successors, (524) [2022-11-03 02:40:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3428 transitions. [2022-11-03 02:40:56,035 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3428 transitions. Word has length 97 [2022-11-03 02:40:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:56,036 INFO L495 AbstractCegarLoop]: Abstraction has 2407 states and 3428 transitions. [2022-11-03 02:40:56,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:40:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3428 transitions. [2022-11-03 02:40:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:40:56,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:56,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:56,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:40:56,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash -503239927, now seen corresponding path program 1 times [2022-11-03 02:40:56,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:56,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159973627] [2022-11-03 02:40:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:56,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:40:56,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159973627] [2022-11-03 02:40:56,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159973627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802317274] [2022-11-03 02:40:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:56,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:56,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:56,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:56,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:40:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:56,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:40:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:40:56,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:56,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802317274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:56,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:40:56,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:40:56,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689937451] [2022-11-03 02:40:56,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:56,432 INFO L87 Difference]: Start difference. First operand 2407 states and 3428 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:40:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:56,761 INFO L93 Difference]: Finished difference Result 4769 states and 6829 transitions. [2022-11-03 02:40:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-03 02:40:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:56,782 INFO L225 Difference]: With dead ends: 4769 [2022-11-03 02:40:56,783 INFO L226 Difference]: Without dead ends: 2995 [2022-11-03 02:40:56,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:56,789 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:56,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 138 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2022-11-03 02:40:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2907. [2022-11-03 02:40:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2257 states have (on average 1.35533894550288) internal successors, (3059), 2274 states have internal predecessors, (3059), 394 states have call successors, (394), 254 states have call predecessors, (394), 255 states have return successors, (549), 379 states have call predecessors, (549), 394 states have call successors, (549) [2022-11-03 02:40:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4002 transitions. [2022-11-03 02:40:57,169 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4002 transitions. Word has length 109 [2022-11-03 02:40:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:57,170 INFO L495 AbstractCegarLoop]: Abstraction has 2907 states and 4002 transitions. [2022-11-03 02:40:57,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:40:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4002 transitions. [2022-11-03 02:40:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:40:57,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:57,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:57,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:57,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:57,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash -811678936, now seen corresponding path program 1 times [2022-11-03 02:40:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:57,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282105530] [2022-11-03 02:40:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:57,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:40:57,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:57,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282105530] [2022-11-03 02:40:57,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282105530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:57,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909884791] [2022-11-03 02:40:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:57,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:57,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:57,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:40:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:40:57,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:40:57,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:57,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909884791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:57,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:40:57,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:40:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97476181] [2022-11-03 02:40:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:57,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:57,726 INFO L87 Difference]: Start difference. First operand 2907 states and 4002 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:40:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:58,069 INFO L93 Difference]: Finished difference Result 5533 states and 7691 transitions. [2022-11-03 02:40:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-03 02:40:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:58,087 INFO L225 Difference]: With dead ends: 5533 [2022-11-03 02:40:58,087 INFO L226 Difference]: Without dead ends: 3401 [2022-11-03 02:40:58,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:40:58,095 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 54 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:58,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 258 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3401 states. [2022-11-03 02:40:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3401 to 3113. [2022-11-03 02:40:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 2439 states have (on average 1.3722837228372284) internal successors, (3347), 2456 states have internal predecessors, (3347), 406 states have call successors, (406), 266 states have call predecessors, (406), 267 states have return successors, (561), 391 states have call predecessors, (561), 406 states have call successors, (561) [2022-11-03 02:40:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 4314 transitions. [2022-11-03 02:40:58,431 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 4314 transitions. Word has length 109 [2022-11-03 02:40:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:58,431 INFO L495 AbstractCegarLoop]: Abstraction has 3113 states and 4314 transitions. [2022-11-03 02:40:58,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:40:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 4314 transitions. [2022-11-03 02:40:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:40:58,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:58,441 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:58,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:58,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:58,654 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash -453680573, now seen corresponding path program 2 times [2022-11-03 02:40:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:58,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341772054] [2022-11-03 02:40:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:40:58,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341772054] [2022-11-03 02:40:58,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341772054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260447026] [2022-11-03 02:40:58,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:40:58,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:58,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:58,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:58,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:40:59,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:40:59,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:40:59,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:40:59,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:59,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260447026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:59,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:40:59,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:40:59,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365073875] [2022-11-03 02:40:59,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:59,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:59,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:59,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:40:59,076 INFO L87 Difference]: Start difference. First operand 3113 states and 4314 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:40:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:59,510 INFO L93 Difference]: Finished difference Result 6048 states and 8599 transitions. [2022-11-03 02:40:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-03 02:40:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:59,531 INFO L225 Difference]: With dead ends: 6048 [2022-11-03 02:40:59,532 INFO L226 Difference]: Without dead ends: 3710 [2022-11-03 02:40:59,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:40:59,542 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 109 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:59,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 272 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:40:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2022-11-03 02:40:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3636. [2022-11-03 02:40:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 2861 states have (on average 1.3579168123033905) internal successors, (3885), 2882 states have internal predecessors, (3885), 465 states have call successors, (465), 309 states have call predecessors, (465), 309 states have return successors, (677), 445 states have call predecessors, (677), 465 states have call successors, (677) [2022-11-03 02:41:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 5027 transitions. [2022-11-03 02:41:00,007 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 5027 transitions. Word has length 109 [2022-11-03 02:41:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:00,008 INFO L495 AbstractCegarLoop]: Abstraction has 3636 states and 5027 transitions. [2022-11-03 02:41:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 5027 transitions. [2022-11-03 02:41:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:41:00,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:00,020 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:00,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:00,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:41:00,246 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1467970757, now seen corresponding path program 1 times [2022-11-03 02:41:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244673826] [2022-11-03 02:41:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:41:00,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:00,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244673826] [2022-11-03 02:41:00,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244673826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042271132] [2022-11-03 02:41:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:00,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:00,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:00,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:00,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:41:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:00,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:00,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:00,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042271132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:00,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:00,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:41:00,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194427345] [2022-11-03 02:41:00,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:00,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:00,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:00,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:00,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:00,749 INFO L87 Difference]: Start difference. First operand 3636 states and 5027 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:01,305 INFO L93 Difference]: Finished difference Result 8632 states and 12093 transitions. [2022-11-03 02:41:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-11-03 02:41:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:01,334 INFO L225 Difference]: With dead ends: 8632 [2022-11-03 02:41:01,334 INFO L226 Difference]: Without dead ends: 5003 [2022-11-03 02:41:01,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:01,349 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 51 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:01,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 219 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2022-11-03 02:41:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 4076. [2022-11-03 02:41:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4076 states, 3249 states have (on average 1.3804247460757155) internal successors, (4485), 3271 states have internal predecessors, (4485), 491 states have call successors, (491), 335 states have call predecessors, (491), 335 states have return successors, (703), 470 states have call predecessors, (703), 491 states have call successors, (703) [2022-11-03 02:41:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 5679 transitions. [2022-11-03 02:41:01,857 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 5679 transitions. Word has length 110 [2022-11-03 02:41:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:01,858 INFO L495 AbstractCegarLoop]: Abstraction has 4076 states and 5679 transitions. [2022-11-03 02:41:01,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 5679 transitions. [2022-11-03 02:41:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:41:01,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:01,868 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:01,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:02,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:41:02,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:02,091 INFO L85 PathProgramCache]: Analyzing trace with hash 549275082, now seen corresponding path program 1 times [2022-11-03 02:41:02,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:02,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002337665] [2022-11-03 02:41:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:02,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:41:02,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:02,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002337665] [2022-11-03 02:41:02,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002337665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:02,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280870219] [2022-11-03 02:41:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:02,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:02,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:02,210 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:02,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:41:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:02,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:41:02,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:41:02,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:02,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280870219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:02,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:02,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:41:02,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949549597] [2022-11-03 02:41:02,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:02,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:02,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:02,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:41:02,396 INFO L87 Difference]: Start difference. First operand 4076 states and 5679 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:41:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:03,032 INFO L93 Difference]: Finished difference Result 7686 states and 10846 transitions. [2022-11-03 02:41:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-03 02:41:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:03,090 INFO L225 Difference]: With dead ends: 7686 [2022-11-03 02:41:03,091 INFO L226 Difference]: Without dead ends: 5586 [2022-11-03 02:41:03,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:41:03,100 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 65 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:03,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 276 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2022-11-03 02:41:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4738. [2022-11-03 02:41:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 3823 states have (on average 1.3975935129479466) internal successors, (5343), 3845 states have internal predecessors, (5343), 535 states have call successors, (535), 379 states have call predecessors, (535), 379 states have return successors, (747), 514 states have call predecessors, (747), 535 states have call successors, (747) [2022-11-03 02:41:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 6625 transitions. [2022-11-03 02:41:03,731 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 6625 transitions. Word has length 111 [2022-11-03 02:41:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:03,732 INFO L495 AbstractCegarLoop]: Abstraction has 4738 states and 6625 transitions. [2022-11-03 02:41:03,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:41:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 6625 transitions. [2022-11-03 02:41:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:41:03,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:03,744 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:03,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:03,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:41:03,970 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1843115252, now seen corresponding path program 1 times [2022-11-03 02:41:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:03,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031250534] [2022-11-03 02:41:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:41:04,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:04,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031250534] [2022-11-03 02:41:04,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031250534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:04,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155947713] [2022-11-03 02:41:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:04,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:04,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:04,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:04,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:41:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:41:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:41:04,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:04,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155947713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:04,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:04,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:41:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106377594] [2022-11-03 02:41:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:04,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:04,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:41:04,313 INFO L87 Difference]: Start difference. First operand 4738 states and 6625 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:41:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:04,883 INFO L93 Difference]: Finished difference Result 8884 states and 12598 transitions. [2022-11-03 02:41:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:04,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-03 02:41:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:04,912 INFO L225 Difference]: With dead ends: 8884 [2022-11-03 02:41:04,912 INFO L226 Difference]: Without dead ends: 6409 [2022-11-03 02:41:04,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:41:04,926 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:04,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 271 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6409 states. [2022-11-03 02:41:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6409 to 5687. [2022-11-03 02:41:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5687 states, 4640 states have (on average 1.4099137931034482) internal successors, (6542), 4662 states have internal predecessors, (6542), 601 states have call successors, (601), 445 states have call predecessors, (601), 445 states have return successors, (813), 580 states have call predecessors, (813), 601 states have call successors, (813) [2022-11-03 02:41:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5687 states to 5687 states and 7956 transitions. [2022-11-03 02:41:05,606 INFO L78 Accepts]: Start accepts. Automaton has 5687 states and 7956 transitions. Word has length 111 [2022-11-03 02:41:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:05,607 INFO L495 AbstractCegarLoop]: Abstraction has 5687 states and 7956 transitions. [2022-11-03 02:41:05,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:41:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5687 states and 7956 transitions. [2022-11-03 02:41:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:41:05,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:05,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:05,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:05,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:41:05,838 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:05,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1197515573, now seen corresponding path program 1 times [2022-11-03 02:41:05,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:05,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197176153] [2022-11-03 02:41:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:05,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:41:06,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:06,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197176153] [2022-11-03 02:41:06,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197176153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:06,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083063384] [2022-11-03 02:41:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:06,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:06,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:06,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:06,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:41:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:41:06,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:41:06,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:06,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083063384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:06,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:06,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:41:06,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070158428] [2022-11-03 02:41:06,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:06,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:41:06,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:06,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:41:06,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:41:06,505 INFO L87 Difference]: Start difference. First operand 5687 states and 7956 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:41:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:07,792 INFO L93 Difference]: Finished difference Result 13521 states and 18878 transitions. [2022-11-03 02:41:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:41:07,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-03 02:41:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:07,830 INFO L225 Difference]: With dead ends: 13521 [2022-11-03 02:41:07,830 INFO L226 Difference]: Without dead ends: 7841 [2022-11-03 02:41:07,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:41:07,847 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 359 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:07,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 236 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:41:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7841 states. [2022-11-03 02:41:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7841 to 7839. [2022-11-03 02:41:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 6355 states have (on average 1.3830055074744296) internal successors, (8789), 6387 states have internal predecessors, (8789), 853 states have call successors, (853), 630 states have call predecessors, (853), 630 states have return successors, (1158), 822 states have call predecessors, (1158), 853 states have call successors, (1158) [2022-11-03 02:41:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 10800 transitions. [2022-11-03 02:41:09,163 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 10800 transitions. Word has length 111 [2022-11-03 02:41:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:09,163 INFO L495 AbstractCegarLoop]: Abstraction has 7839 states and 10800 transitions. [2022-11-03 02:41:09,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:41:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 10800 transitions. [2022-11-03 02:41:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:41:09,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:09,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:09,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:09,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:41:09,393 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1602782200, now seen corresponding path program 1 times [2022-11-03 02:41:09,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:09,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367835411] [2022-11-03 02:41:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:09,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:41:09,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:09,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367835411] [2022-11-03 02:41:09,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367835411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:09,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970662643] [2022-11-03 02:41:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:09,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:09,658 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:09,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:41:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:09,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:41:09,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:09,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970662643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:09,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:09,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:41:09,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060006258] [2022-11-03 02:41:09,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:09,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:09,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:09,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:09,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:09,881 INFO L87 Difference]: Start difference. First operand 7839 states and 10800 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:41:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:10,802 INFO L93 Difference]: Finished difference Result 13435 states and 19029 transitions. [2022-11-03 02:41:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-11-03 02:41:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:10,836 INFO L225 Difference]: With dead ends: 13435 [2022-11-03 02:41:10,837 INFO L226 Difference]: Without dead ends: 7859 [2022-11-03 02:41:10,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:10,919 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 90 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:10,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 267 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2022-11-03 02:41:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 7743. [2022-11-03 02:41:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7743 states, 6259 states have (on average 1.3562869467966128) internal successors, (8489), 6291 states have internal predecessors, (8489), 853 states have call successors, (853), 630 states have call predecessors, (853), 630 states have return successors, (1158), 822 states have call predecessors, (1158), 853 states have call successors, (1158) [2022-11-03 02:41:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 10500 transitions. [2022-11-03 02:41:11,713 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 10500 transitions. Word has length 112 [2022-11-03 02:41:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:11,713 INFO L495 AbstractCegarLoop]: Abstraction has 7743 states and 10500 transitions. [2022-11-03 02:41:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:41:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 10500 transitions. [2022-11-03 02:41:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:41:11,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:11,734 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:11,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:11,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:41:11,944 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash 628546938, now seen corresponding path program 1 times [2022-11-03 02:41:11,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:11,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084502429] [2022-11-03 02:41:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:11,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:41:12,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:12,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084502429] [2022-11-03 02:41:12,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084502429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704433641] [2022-11-03 02:41:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:12,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:12,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:12,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:12,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:41:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:12,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:41:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:41:12,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:12,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704433641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:12,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:12,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:41:12,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768229661] [2022-11-03 02:41:12,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:12,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:41:12,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:12,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:41:12,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:12,437 INFO L87 Difference]: Start difference. First operand 7743 states and 10500 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:41:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:13,943 INFO L93 Difference]: Finished difference Result 18441 states and 24941 transitions. [2022-11-03 02:41:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:41:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-03 02:41:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:14,042 INFO L225 Difference]: With dead ends: 18441 [2022-11-03 02:41:14,044 INFO L226 Difference]: Without dead ends: 10705 [2022-11-03 02:41:14,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:41:14,068 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 365 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:14,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 220 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:41:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2022-11-03 02:41:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 10703. [2022-11-03 02:41:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10703 states, 8597 states have (on average 1.3277887635221588) internal successors, (11415), 8644 states have internal predecessors, (11415), 1212 states have call successors, (1212), 893 states have call predecessors, (1212), 893 states have return successors, (1648), 1166 states have call predecessors, (1648), 1212 states have call successors, (1648) [2022-11-03 02:41:15,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10703 states to 10703 states and 14275 transitions. [2022-11-03 02:41:15,619 INFO L78 Accepts]: Start accepts. Automaton has 10703 states and 14275 transitions. Word has length 112 [2022-11-03 02:41:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:15,620 INFO L495 AbstractCegarLoop]: Abstraction has 10703 states and 14275 transitions. [2022-11-03 02:41:15,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:41:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 10703 states and 14275 transitions. [2022-11-03 02:41:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:41:15,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:15,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:15,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:15,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:41:15,858 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash 297995306, now seen corresponding path program 1 times [2022-11-03 02:41:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:15,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193774353] [2022-11-03 02:41:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:41:16,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:16,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193774353] [2022-11-03 02:41:16,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193774353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:16,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114395028] [2022-11-03 02:41:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:16,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:16,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:16,043 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:41:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:41:16,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:16,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114395028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:16,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:16,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-03 02:41:16,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83307838] [2022-11-03 02:41:16,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:16,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:16,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:16,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:16,282 INFO L87 Difference]: Start difference. First operand 10703 states and 14275 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:41:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:17,642 INFO L93 Difference]: Finished difference Result 16340 states and 21632 transitions. [2022-11-03 02:41:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:41:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-03 02:41:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:17,691 INFO L225 Difference]: With dead ends: 16340 [2022-11-03 02:41:17,692 INFO L226 Difference]: Without dead ends: 11174 [2022-11-03 02:41:17,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:41:17,708 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 106 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:17,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 417 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11174 states. [2022-11-03 02:41:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11174 to 10945. [2022-11-03 02:41:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 8792 states have (on average 1.3248407643312101) internal successors, (11648), 8857 states have internal predecessors, (11648), 1219 states have call successors, (1219), 897 states have call predecessors, (1219), 933 states have return successors, (1709), 1191 states have call predecessors, (1709), 1219 states have call successors, (1709) [2022-11-03 02:41:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 14576 transitions. [2022-11-03 02:41:18,882 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 14576 transitions. Word has length 116 [2022-11-03 02:41:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:18,883 INFO L495 AbstractCegarLoop]: Abstraction has 10945 states and 14576 transitions. [2022-11-03 02:41:18,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:41:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 14576 transitions. [2022-11-03 02:41:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 02:41:18,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:18,902 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:18,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:19,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:19,118 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:19,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1272080199, now seen corresponding path program 1 times [2022-11-03 02:41:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:19,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18813395] [2022-11-03 02:41:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:19,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:41:19,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:19,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18813395] [2022-11-03 02:41:19,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18813395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:19,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257861387] [2022-11-03 02:41:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:19,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:19,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:19,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:41:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:19,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:41:19,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:19,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257861387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:19,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:19,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 02:41:19,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685037873] [2022-11-03 02:41:19,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:19,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:19,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:19,380 INFO L87 Difference]: Start difference. First operand 10945 states and 14576 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:20,426 INFO L93 Difference]: Finished difference Result 16057 states and 21446 transitions. [2022-11-03 02:41:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:20,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-03 02:41:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:20,474 INFO L225 Difference]: With dead ends: 16057 [2022-11-03 02:41:20,474 INFO L226 Difference]: Without dead ends: 10687 [2022-11-03 02:41:20,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:20,489 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 22 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:20,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 213 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10687 states. [2022-11-03 02:41:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10687 to 10687. [2022-11-03 02:41:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10687 states, 8570 states have (on average 1.3248541423570594) internal successors, (11354), 8626 states have internal predecessors, (11354), 1219 states have call successors, (1219), 897 states have call predecessors, (1219), 897 states have return successors, (1655), 1164 states have call predecessors, (1655), 1219 states have call successors, (1655) [2022-11-03 02:41:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10687 states to 10687 states and 14228 transitions. [2022-11-03 02:41:21,666 INFO L78 Accepts]: Start accepts. Automaton has 10687 states and 14228 transitions. Word has length 117 [2022-11-03 02:41:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:21,666 INFO L495 AbstractCegarLoop]: Abstraction has 10687 states and 14228 transitions. [2022-11-03 02:41:21,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 10687 states and 14228 transitions. [2022-11-03 02:41:21,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 02:41:21,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:21,690 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:21,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:21,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:21,918 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:21,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1150203637, now seen corresponding path program 1 times [2022-11-03 02:41:21,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:21,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707623815] [2022-11-03 02:41:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:21,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:41:22,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:22,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707623815] [2022-11-03 02:41:22,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707623815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:22,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997029669] [2022-11-03 02:41:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:22,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:22,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:22,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:22,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:41:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:22,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:41:22,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:41:22,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:22,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997029669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:22,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:22,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 02:41:22,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951288918] [2022-11-03 02:41:22,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:22,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:41:22,447 INFO L87 Difference]: Start difference. First operand 10687 states and 14228 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:24,127 INFO L93 Difference]: Finished difference Result 19676 states and 26675 transitions. [2022-11-03 02:41:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-03 02:41:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:24,192 INFO L225 Difference]: With dead ends: 19676 [2022-11-03 02:41:24,193 INFO L226 Difference]: Without dead ends: 12194 [2022-11-03 02:41:24,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:41:24,220 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 78 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:24,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 153 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12194 states. [2022-11-03 02:41:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12194 to 12054. [2022-11-03 02:41:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12054 states, 9829 states have (on average 1.2997253026757554) internal successors, (12775), 9885 states have internal predecessors, (12775), 1232 states have call successors, (1232), 992 states have call predecessors, (1232), 992 states have return successors, (1844), 1177 states have call predecessors, (1844), 1232 states have call successors, (1844) [2022-11-03 02:41:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 15851 transitions. [2022-11-03 02:41:25,535 INFO L78 Accepts]: Start accepts. Automaton has 12054 states and 15851 transitions. Word has length 117 [2022-11-03 02:41:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:25,536 INFO L495 AbstractCegarLoop]: Abstraction has 12054 states and 15851 transitions. [2022-11-03 02:41:25,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12054 states and 15851 transitions. [2022-11-03 02:41:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 02:41:25,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:25,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:25,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:25,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:25,763 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1705256235, now seen corresponding path program 1 times [2022-11-03 02:41:25,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:25,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784487030] [2022-11-03 02:41:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:41:25,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:25,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784487030] [2022-11-03 02:41:25,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784487030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:25,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72347350] [2022-11-03 02:41:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:25,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:25,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:25,850 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:25,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:41:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:26,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:41:26,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:26,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72347350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:26,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:26,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 02:41:26,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385889672] [2022-11-03 02:41:26,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:26,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:26,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:26,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:26,054 INFO L87 Difference]: Start difference. First operand 12054 states and 15851 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:41:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:26,977 INFO L93 Difference]: Finished difference Result 20438 states and 27675 transitions. [2022-11-03 02:41:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2022-11-03 02:41:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:27,021 INFO L225 Difference]: With dead ends: 20438 [2022-11-03 02:41:27,022 INFO L226 Difference]: Without dead ends: 12029 [2022-11-03 02:41:27,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:27,046 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 87 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:27,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 274 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12029 states. [2022-11-03 02:41:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12029 to 11878. [2022-11-03 02:41:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11878 states, 9653 states have (on average 1.2701750751061847) internal successors, (12261), 9709 states have internal predecessors, (12261), 1232 states have call successors, (1232), 992 states have call predecessors, (1232), 992 states have return successors, (1844), 1177 states have call predecessors, (1844), 1232 states have call successors, (1844) [2022-11-03 02:41:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11878 states to 11878 states and 15337 transitions. [2022-11-03 02:41:28,476 INFO L78 Accepts]: Start accepts. Automaton has 11878 states and 15337 transitions. Word has length 117 [2022-11-03 02:41:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:28,477 INFO L495 AbstractCegarLoop]: Abstraction has 11878 states and 15337 transitions. [2022-11-03 02:41:28,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:41:28,477 INFO L276 IsEmpty]: Start isEmpty. Operand 11878 states and 15337 transitions. [2022-11-03 02:41:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:41:28,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:28,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:28,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:28,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 02:41:28,702 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:28,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:28,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1345293798, now seen corresponding path program 1 times [2022-11-03 02:41:28,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:28,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710293869] [2022-11-03 02:41:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:28,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:41:29,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710293869] [2022-11-03 02:41:29,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710293869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:29,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717105889] [2022-11-03 02:41:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:29,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:29,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:29,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:41:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:41:29,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:41:29,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:41:30,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717105889] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:30,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:30,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 8] total 20 [2022-11-03 02:41:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320938400] [2022-11-03 02:41:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:41:30,073 INFO L87 Difference]: Start difference. First operand 11878 states and 15337 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:31,333 INFO L93 Difference]: Finished difference Result 24030 states and 31163 transitions. [2022-11-03 02:41:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:31,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2022-11-03 02:41:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:31,371 INFO L225 Difference]: With dead ends: 24030 [2022-11-03 02:41:31,371 INFO L226 Difference]: Without dead ends: 13452 [2022-11-03 02:41:31,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:41:31,395 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 103 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:31,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 273 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13452 states. [2022-11-03 02:41:32,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13452 to 13083. [2022-11-03 02:41:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13083 states, 10783 states have (on average 1.2501159232124641) internal successors, (13480), 10848 states have internal predecessors, (13480), 1238 states have call successors, (1238), 1052 states have call predecessors, (1238), 1061 states have return successors, (1811), 1183 states have call predecessors, (1811), 1238 states have call successors, (1811) [2022-11-03 02:41:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13083 states to 13083 states and 16529 transitions. [2022-11-03 02:41:32,730 INFO L78 Accepts]: Start accepts. Automaton has 13083 states and 16529 transitions. Word has length 114 [2022-11-03 02:41:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:32,731 INFO L495 AbstractCegarLoop]: Abstraction has 13083 states and 16529 transitions. [2022-11-03 02:41:32,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 13083 states and 16529 transitions. [2022-11-03 02:41:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 02:41:32,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:32,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:32,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 02:41:32,962 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash -387140788, now seen corresponding path program 1 times [2022-11-03 02:41:32,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:32,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194586026] [2022-11-03 02:41:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:32,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:41:33,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:33,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194586026] [2022-11-03 02:41:33,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194586026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:33,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:33,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:41:33,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175931148] [2022-11-03 02:41:33,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:33,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:33,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:33,220 INFO L87 Difference]: Start difference. First operand 13083 states and 16529 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:35,828 INFO L93 Difference]: Finished difference Result 33311 states and 42111 transitions. [2022-11-03 02:41:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:41:35,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-03 02:41:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:35,872 INFO L225 Difference]: With dead ends: 33311 [2022-11-03 02:41:35,872 INFO L226 Difference]: Without dead ends: 17266 [2022-11-03 02:41:35,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:35,905 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 96 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:35,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 418 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:41:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17266 states. [2022-11-03 02:41:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17266 to 16768. [2022-11-03 02:41:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16768 states, 13681 states have (on average 1.2340472187705578) internal successors, (16883), 13803 states have internal predecessors, (16883), 1672 states have call successors, (1672), 1405 states have call predecessors, (1672), 1414 states have return successors, (2437), 1560 states have call predecessors, (2437), 1672 states have call successors, (2437) [2022-11-03 02:41:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16768 states to 16768 states and 20992 transitions. [2022-11-03 02:41:37,720 INFO L78 Accepts]: Start accepts. Automaton has 16768 states and 20992 transitions. Word has length 115 [2022-11-03 02:41:37,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:37,721 INFO L495 AbstractCegarLoop]: Abstraction has 16768 states and 20992 transitions. [2022-11-03 02:41:37,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 16768 states and 20992 transitions. [2022-11-03 02:41:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:41:37,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:37,732 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:37,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 02:41:37,733 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:37,734 INFO L85 PathProgramCache]: Analyzing trace with hash -264235060, now seen corresponding path program 1 times [2022-11-03 02:41:37,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:37,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853665098] [2022-11-03 02:41:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:41:38,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:38,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853665098] [2022-11-03 02:41:38,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853665098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:38,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256336185] [2022-11-03 02:41:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:38,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:38,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:38,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:38,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:41:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:38,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:41:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:38,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 02:41:38,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256336185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:38,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841820686] [2022-11-03 02:41:39,017 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:41:39,018 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:41:39,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:41:39,027 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:41:39,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:42:00,946 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 207 for LOIs [2022-11-03 02:42:23,445 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 150 for LOIs [2022-11-03 02:42:23,484 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 215 for LOIs [2022-11-03 02:42:23,553 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 158 for LOIs [2022-11-03 02:42:24,300 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 65 for LOIs [2022-11-03 02:42:27,962 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 247 for LOIs [2022-11-03 02:42:29,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:43:01,890 WARN L234 SmtUtils]: Spent 10.32s on a formula simplification. DAG size of input: 535 DAG size of output: 371 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:43:24,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '513237#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~slow_clk_edge~0 0) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~fast_clk_edge~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= ~t~0 0) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start_eval2_~tmp~5#1| 0)) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-03 02:43:24,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:43:24,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:43:24,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-03 02:43:24,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648565585] [2022-11-03 02:43:24,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:24,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:43:24,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:43:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=4627, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 02:43:24,780 INFO L87 Difference]: Start difference. First operand 16768 states and 20992 transitions. Second operand has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 02:43:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:32,417 INFO L93 Difference]: Finished difference Result 33057 states and 41476 transitions. [2022-11-03 02:43:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-03 02:43:32,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 120 [2022-11-03 02:43:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:32,455 INFO L225 Difference]: With dead ends: 33057 [2022-11-03 02:43:32,455 INFO L226 Difference]: Without dead ends: 16248 [2022-11-03 02:43:32,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 376 SyntacticMatches, 13 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17575 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=2486, Invalid=36520, Unknown=0, NotChecked=0, Total=39006 [2022-11-03 02:43:32,501 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 2722 mSDsluCounter, 2925 mSDsCounter, 0 mSdLazyCounter, 2960 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2743 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 3956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 2960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:32,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2743 Valid, 2711 Invalid, 3956 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [996 Valid, 2960 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:43:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16248 states. [2022-11-03 02:43:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16248 to 12185. [2022-11-03 02:43:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12185 states, 10015 states have (on average 1.2227658512231652) internal successors, (12246), 10081 states have internal predecessors, (12246), 1137 states have call successors, (1137), 1029 states have call predecessors, (1137), 1032 states have return successors, (1411), 1074 states have call predecessors, (1411), 1137 states have call successors, (1411) [2022-11-03 02:43:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12185 states to 12185 states and 14794 transitions. [2022-11-03 02:43:34,124 INFO L78 Accepts]: Start accepts. Automaton has 12185 states and 14794 transitions. Word has length 120 [2022-11-03 02:43:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:34,124 INFO L495 AbstractCegarLoop]: Abstraction has 12185 states and 14794 transitions. [2022-11-03 02:43:34,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 02:43:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 12185 states and 14794 transitions. [2022-11-03 02:43:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:43:34,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:34,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:34,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:34,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:34,333 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2116739977, now seen corresponding path program 1 times [2022-11-03 02:43:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:34,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216572087] [2022-11-03 02:43:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:43:34,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216572087] [2022-11-03 02:43:34,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216572087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908439162] [2022-11-03 02:43:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:34,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:34,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:34,554 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:34,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:43:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:43:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:34,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:34,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908439162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:34,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:34,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 02:43:34,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174296246] [2022-11-03 02:43:34,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:34,809 INFO L87 Difference]: Start difference. First operand 12185 states and 14794 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:43:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:36,437 INFO L93 Difference]: Finished difference Result 23388 states and 28505 transitions. [2022-11-03 02:43:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:43:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-03 02:43:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:36,480 INFO L225 Difference]: With dead ends: 23388 [2022-11-03 02:43:36,480 INFO L226 Difference]: Without dead ends: 14854 [2022-11-03 02:43:36,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:36,496 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 197 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:36,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 358 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:43:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14854 states. [2022-11-03 02:43:37,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14854 to 13364. [2022-11-03 02:43:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13364 states, 10915 states have (on average 1.2114521300961978) internal successors, (13223), 11005 states have internal predecessors, (13223), 1285 states have call successors, (1285), 1141 states have call predecessors, (1285), 1163 states have return successors, (1695), 1217 states have call predecessors, (1695), 1285 states have call successors, (1695) [2022-11-03 02:43:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13364 states to 13364 states and 16203 transitions. [2022-11-03 02:43:37,926 INFO L78 Accepts]: Start accepts. Automaton has 13364 states and 16203 transitions. Word has length 116 [2022-11-03 02:43:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:37,926 INFO L495 AbstractCegarLoop]: Abstraction has 13364 states and 16203 transitions. [2022-11-03 02:43:37,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:43:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 13364 states and 16203 transitions. [2022-11-03 02:43:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:43:37,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:37,935 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:37,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:38,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 02:43:38,146 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1702646528, now seen corresponding path program 1 times [2022-11-03 02:43:38,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875512166] [2022-11-03 02:43:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:43:38,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875512166] [2022-11-03 02:43:38,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875512166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091900] [2022-11-03 02:43:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:38,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:38,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:38,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:43:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:38,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:43:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:43:38,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 02:43:39,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095909209] [2022-11-03 02:43:39,093 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:43:39,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:43:39,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:43:39,095 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:43:39,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:43:49,240 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2022-11-03 02:44:06,534 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 140 for LOIs [2022-11-03 02:44:06,577 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 215 for LOIs [2022-11-03 02:44:06,664 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 88 for LOIs [2022-11-03 02:44:06,796 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 140 for LOIs [2022-11-03 02:44:07,963 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 247 for LOIs [2022-11-03 02:44:33,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:45:24,473 WARN L234 SmtUtils]: Spent 47.79s on a formula simplification. DAG size of input: 711 DAG size of output: 558 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:44,101 WARN L234 SmtUtils]: Spent 9.23s on a formula simplification. DAG size of input: 404 DAG size of output: 270 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:04,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1095909209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:04,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:46:04,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [8, 9, 6] total 66 [2022-11-03 02:46:04,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001837346] [2022-11-03 02:46:04,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:04,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 02:46:04,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 02:46:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=3788, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:46:04,841 INFO L87 Difference]: Start difference. First operand 13364 states and 16203 transitions. Second operand has 51 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:46:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:37,621 INFO L93 Difference]: Finished difference Result 25784 states and 31278 transitions. [2022-11-03 02:46:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-03 02:46:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 123 [2022-11-03 02:46:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:37,660 INFO L225 Difference]: With dead ends: 25784 [2022-11-03 02:46:37,660 INFO L226 Difference]: Without dead ends: 12625 [2022-11-03 02:46:37,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 118.0s TimeCoverageRelationStatistics Valid=1016, Invalid=7914, Unknown=0, NotChecked=0, Total=8930 [2022-11-03 02:46:37,682 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 299 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:37,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1078 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 02:46:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12625 states. [2022-11-03 02:46:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12625 to 12588. [2022-11-03 02:46:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12588 states, 10272 states have (on average 1.2099883177570094) internal successors, (12429), 10358 states have internal predecessors, (12429), 1213 states have call successors, (1213), 1081 states have call predecessors, (1213), 1102 states have return successors, (1615), 1148 states have call predecessors, (1615), 1213 states have call successors, (1615) [2022-11-03 02:46:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12588 states to 12588 states and 15257 transitions. [2022-11-03 02:46:39,275 INFO L78 Accepts]: Start accepts. Automaton has 12588 states and 15257 transitions. Word has length 123 [2022-11-03 02:46:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:39,276 INFO L495 AbstractCegarLoop]: Abstraction has 12588 states and 15257 transitions. [2022-11-03 02:46:39,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:46:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 12588 states and 15257 transitions. [2022-11-03 02:46:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:46:39,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:39,284 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:39,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:39,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 02:46:39,485 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1901374219, now seen corresponding path program 1 times [2022-11-03 02:46:39,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:39,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63630869] [2022-11-03 02:46:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:39,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:46:39,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:39,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63630869] [2022-11-03 02:46:39,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63630869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:39,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481434438] [2022-11-03 02:46:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:39,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:39,794 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:39,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:46:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:39,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:46:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:46:40,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:46:40,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481434438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:40,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188570180] [2022-11-03 02:46:40,565 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-03 02:46:40,565 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:40,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:40,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:40,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:51,068 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2022-11-03 02:46:58,541 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 140 for LOIs [2022-11-03 02:46:58,582 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 215 for LOIs [2022-11-03 02:46:58,666 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 88 for LOIs [2022-11-03 02:46:58,848 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 140 for LOIs [2022-11-03 02:47:00,039 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 247 for LOIs [2022-11-03 02:47:07,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:47:19,969 WARN L234 SmtUtils]: Spent 10.12s on a formula simplification. DAG size of input: 287 DAG size of output: 241 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:35,042 WARN L234 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 322 DAG size of output: 217 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:57,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [188570180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:57,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:47:57,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [8, 10, 6] total 68 [2022-11-03 02:47:57,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395093598] [2022-11-03 02:47:57,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:57,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 02:47:57,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:57,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 02:47:57,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=4053, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 02:47:57,160 INFO L87 Difference]: Start difference. First operand 12588 states and 15257 transitions. Second operand has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:48:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:31,189 INFO L93 Difference]: Finished difference Result 20712 states and 25184 transitions. [2022-11-03 02:48:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 02:48:31,190 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 125 [2022-11-03 02:48:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:31,217 INFO L225 Difference]: With dead ends: 20712 [2022-11-03 02:48:31,217 INFO L226 Difference]: Without dead ends: 10708 [2022-11-03 02:48:31,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 77.4s TimeCoverageRelationStatistics Valid=1026, Invalid=8480, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 02:48:31,231 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 282 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 3017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:31,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1747 Invalid, 3017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2914 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 02:48:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2022-11-03 02:48:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 10583. [2022-11-03 02:48:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10583 states, 8613 states have (on average 1.2038778590502728) internal successors, (10369), 8693 states have internal predecessors, (10369), 1028 states have call successors, (1028), 920 states have call predecessors, (1028), 941 states have return successors, (1408), 969 states have call predecessors, (1408), 1028 states have call successors, (1408) [2022-11-03 02:48:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10583 states to 10583 states and 12805 transitions. [2022-11-03 02:48:32,424 INFO L78 Accepts]: Start accepts. Automaton has 10583 states and 12805 transitions. Word has length 125 [2022-11-03 02:48:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:32,425 INFO L495 AbstractCegarLoop]: Abstraction has 10583 states and 12805 transitions. [2022-11-03 02:48:32,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:48:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 10583 states and 12805 transitions. [2022-11-03 02:48:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:48:32,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:32,433 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:32,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:32,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 02:48:32,658 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:32,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1424051877, now seen corresponding path program 1 times [2022-11-03 02:48:32,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:32,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295408397] [2022-11-03 02:48:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:32,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:48:32,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:32,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295408397] [2022-11-03 02:48:32,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295408397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:32,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897548767] [2022-11-03 02:48:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:32,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:32,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:32,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:32,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:48:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:33,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:48:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:48:33,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:48:33,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897548767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:33,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654832768] [2022-11-03 02:48:33,766 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-03 02:48:33,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:33,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:33,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:33,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:44,571 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2022-11-03 02:49:14,988 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 140 for LOIs [2022-11-03 02:49:15,030 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 215 for LOIs [2022-11-03 02:49:15,117 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 88 for LOIs [2022-11-03 02:49:15,283 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 140 for LOIs [2022-11-03 02:49:16,861 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 247 for LOIs [2022-11-03 02:49:41,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:50:19,139 WARN L234 SmtUtils]: Spent 34.37s on a formula simplification. DAG size of input: 494 DAG size of output: 448 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:47,574 WARN L234 SmtUtils]: Spent 17.35s on a formula simplification. DAG size of input: 502 DAG size of output: 326 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:51:11,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1654832768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:11,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:51:11,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [8, 9, 6] total 67 [2022-11-03 02:51:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849693960] [2022-11-03 02:51:11,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:11,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 02:51:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:11,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 02:51:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=3916, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:51:11,818 INFO L87 Difference]: Start difference. First operand 10583 states and 12805 transitions. Second operand has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:51:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:45,430 INFO L93 Difference]: Finished difference Result 18714 states and 22542 transitions. [2022-11-03 02:51:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 02:51:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 125 [2022-11-03 02:51:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:45,458 INFO L225 Difference]: With dead ends: 18714 [2022-11-03 02:51:45,458 INFO L226 Difference]: Without dead ends: 12307 [2022-11-03 02:51:45,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 315 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 116.1s TimeCoverageRelationStatistics Valid=968, Invalid=7774, Unknown=0, NotChecked=0, Total=8742 [2022-11-03 02:51:45,470 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 312 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:45,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1180 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 02:51:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12307 states. [2022-11-03 02:51:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12307 to 11537. [2022-11-03 02:51:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 9364 states have (on average 1.1993806065783854) internal successors, (11231), 9451 states have internal predecessors, (11231), 1140 states have call successors, (1140), 1007 states have call predecessors, (1140), 1032 states have return successors, (1548), 1078 states have call predecessors, (1548), 1140 states have call successors, (1548) [2022-11-03 02:51:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 13919 transitions. [2022-11-03 02:51:47,057 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 13919 transitions. Word has length 125 [2022-11-03 02:51:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:47,057 INFO L495 AbstractCegarLoop]: Abstraction has 11537 states and 13919 transitions. [2022-11-03 02:51:47,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:51:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 13919 transitions. [2022-11-03 02:51:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 02:51:47,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:47,063 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:47,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:47,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 02:51:47,263 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash -710864486, now seen corresponding path program 1 times [2022-11-03 02:51:47,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:47,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032136558] [2022-11-03 02:51:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:51:48,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:48,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032136558] [2022-11-03 02:51:48,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032136558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:48,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57158254] [2022-11-03 02:51:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:48,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:48,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:48,103 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:48,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:51:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:51:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:51:48,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 02:51:49,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57158254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:49,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228568623] [2022-11-03 02:51:49,783 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-03 02:51:49,783 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:51:49,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:51:49,784 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:51:49,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:21,616 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 140 for LOIs [2022-11-03 02:52:21,666 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 79 for LOIs [2022-11-03 02:52:21,679 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 137 for LOIs [2022-11-03 02:52:21,704 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 88 for LOIs [2022-11-03 02:52:21,869 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 167 for LOIs [2022-11-03 02:52:22,721 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 137 for LOIs [2022-11-03 02:52:22,766 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:05,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '764351#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~slow_clk_edge~0 0) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~fast_clk_edge~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= ~t~0 0) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-03 02:53:05,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:53:05,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:53:05,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2022-11-03 02:53:05,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14045683] [2022-11-03 02:53:05,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:05,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:53:05,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:05,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:53:05,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=7921, Unknown=0, NotChecked=0, Total=8556 [2022-11-03 02:53:05,152 INFO L87 Difference]: Start difference. First operand 11537 states and 13919 transitions. Second operand has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-03 02:53:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:16,324 INFO L93 Difference]: Finished difference Result 24022 states and 29465 transitions. [2022-11-03 02:53:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-03 02:53:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 127 [2022-11-03 02:53:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:16,360 INFO L225 Difference]: With dead ends: 24022 [2022-11-03 02:53:16,360 INFO L226 Difference]: Without dead ends: 13669 [2022-11-03 02:53:16,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 313 SyntacticMatches, 16 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10006 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=2407, Invalid=21773, Unknown=0, NotChecked=0, Total=24180 [2022-11-03 02:53:16,384 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 6183 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 3997 mSolverCounterSat, 2816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6183 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 6813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2816 IncrementalHoareTripleChecker+Valid, 3997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:16,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6183 Valid, 1188 Invalid, 6813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2816 Valid, 3997 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 02:53:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13669 states. [2022-11-03 02:53:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13669 to 7841. [2022-11-03 02:53:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7841 states, 6353 states have (on average 1.2047851408783252) internal successors, (7654), 6407 states have internal predecessors, (7654), 792 states have call successors, (792), 701 states have call predecessors, (792), 695 states have return successors, (974), 732 states have call predecessors, (974), 792 states have call successors, (974) [2022-11-03 02:53:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7841 states to 7841 states and 9420 transitions. [2022-11-03 02:53:17,752 INFO L78 Accepts]: Start accepts. Automaton has 7841 states and 9420 transitions. Word has length 127 [2022-11-03 02:53:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:17,752 INFO L495 AbstractCegarLoop]: Abstraction has 7841 states and 9420 transitions. [2022-11-03 02:53:17,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-03 02:53:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7841 states and 9420 transitions. [2022-11-03 02:53:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 02:53:17,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:17,757 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:17,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:17,972 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -661480290, now seen corresponding path program 1 times [2022-11-03 02:53:17,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:17,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074211612] [2022-11-03 02:53:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:53:18,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:18,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074211612] [2022-11-03 02:53:18,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074211612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:18,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360730055] [2022-11-03 02:53:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:18,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:18,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:18,170 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:18,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:53:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:53:18,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:53:18,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:18,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360730055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:18,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:18,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 02:53:18,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577195137] [2022-11-03 02:53:18,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:18,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:18,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:18,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:18,468 INFO L87 Difference]: Start difference. First operand 7841 states and 9420 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:53:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:19,846 INFO L93 Difference]: Finished difference Result 15360 states and 18870 transitions. [2022-11-03 02:53:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:19,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-11-03 02:53:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:19,865 INFO L225 Difference]: With dead ends: 15360 [2022-11-03 02:53:19,865 INFO L226 Difference]: Without dead ends: 8479 [2022-11-03 02:53:19,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:19,879 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 78 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:19,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 149 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:53:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2022-11-03 02:53:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 8193. [2022-11-03 02:53:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8193 states, 6698 states have (on average 1.1772170797252912) internal successors, (7885), 6752 states have internal predecessors, (7885), 781 states have call successors, (781), 719 states have call predecessors, (781), 713 states have return successors, (1005), 721 states have call predecessors, (1005), 781 states have call successors, (1005) [2022-11-03 02:53:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8193 states to 8193 states and 9671 transitions. [2022-11-03 02:53:21,243 INFO L78 Accepts]: Start accepts. Automaton has 8193 states and 9671 transitions. Word has length 141 [2022-11-03 02:53:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:21,244 INFO L495 AbstractCegarLoop]: Abstraction has 8193 states and 9671 transitions. [2022-11-03 02:53:21,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:53:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8193 states and 9671 transitions. [2022-11-03 02:53:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:53:21,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:21,247 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:21,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:21,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:21,449 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:21,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1009192040, now seen corresponding path program 1 times [2022-11-03 02:53:21,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:21,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904281826] [2022-11-03 02:53:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:21,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 02:53:21,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904281826] [2022-11-03 02:53:21,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904281826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:21,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009322527] [2022-11-03 02:53:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:21,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:21,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:21,785 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:21,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 02:53:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:21,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:53:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:53:22,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:22,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009322527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:22,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:22,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 02:53:22,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790130505] [2022-11-03 02:53:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:22,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:53:22,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:53:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:22,106 INFO L87 Difference]: Start difference. First operand 8193 states and 9671 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:53:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:23,966 INFO L93 Difference]: Finished difference Result 16324 states and 19230 transitions. [2022-11-03 02:53:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:53:23,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-03 02:53:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:23,998 INFO L225 Difference]: With dead ends: 16324 [2022-11-03 02:53:23,999 INFO L226 Difference]: Without dead ends: 9070 [2022-11-03 02:53:24,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:24,017 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 206 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:24,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 339 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9070 states. [2022-11-03 02:53:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9070 to 8049. [2022-11-03 02:53:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8049 states, 6496 states have (on average 1.1544027093596059) internal successors, (7499), 6525 states have internal predecessors, (7499), 828 states have call successors, (828), 739 states have call predecessors, (828), 724 states have return successors, (1023), 784 states have call predecessors, (1023), 828 states have call successors, (1023) [2022-11-03 02:53:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8049 states to 8049 states and 9350 transitions. [2022-11-03 02:53:25,515 INFO L78 Accepts]: Start accepts. Automaton has 8049 states and 9350 transitions. Word has length 144 [2022-11-03 02:53:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:25,516 INFO L495 AbstractCegarLoop]: Abstraction has 8049 states and 9350 transitions. [2022-11-03 02:53:25,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:53:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8049 states and 9350 transitions. [2022-11-03 02:53:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-03 02:53:25,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:25,520 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:25,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:25,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ccaf50f-a2e8-46e2-ab55-af3a7679bc00/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:25,721 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2141812975, now seen corresponding path program 1 times [2022-11-03 02:53:25,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:25,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066265630] [2022-11-03 02:53:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:25,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-03 02:53:25,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:25,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066265630] [2022-11-03 02:53:25,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066265630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:25,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:25,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:53:25,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677909362] [2022-11-03 02:53:25,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:25,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:53:25,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:25,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:53:25,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:25,982 INFO L87 Difference]: Start difference. First operand 8049 states and 9350 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11)