./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.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_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/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_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/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_be6a52e1-6855-4188-9c8b-87599d3ac66c/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 e81bb624b13c4231a79ab1bd2052849a1a89cc393bc6bb2c02746b61da23cad6 --- 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 01:40:46,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:40:46,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:40:46,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:40:46,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:40:46,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:40:46,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:40:46,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:40:46,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:40:46,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:40:46,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:40:46,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:40:46,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:40:46,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:40:46,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:40:46,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:40:46,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:40:46,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:40:46,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:40:47,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:40:47,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:40:47,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:40:47,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:40:47,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:40:47,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:40:47,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:40:47,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:40:47,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:40:47,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:40:47,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:40:47,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:40:47,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:40:47,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:40:47,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:40:47,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:40:47,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:40:47,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:40:47,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:40:47,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:40:47,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:40:47,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:40:47,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:40:47,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:40:47,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:40:47,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:40:47,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:40:47,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:40:47,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:40:47,081 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:40:47,082 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:40:47,082 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:40:47,082 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:40:47,083 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:40:47,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:40:47,084 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:40:47,084 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:40:47,084 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:40:47,085 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:40:47,085 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:40:47,085 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:40:47,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:40:47,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:40:47,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:40:47,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:40:47,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:40:47,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:40:47,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:40:47,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:40:47,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:40:47,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:40:47,089 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:40:47,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:40:47,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:40:47,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:40:47,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:47,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:40:47,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:40:47,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:40:47,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:40:47,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:40:47,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:40:47,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:40:47,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:40:47,093 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_be6a52e1-6855-4188-9c8b-87599d3ac66c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e81bb624b13c4231a79ab1bd2052849a1a89cc393bc6bb2c02746b61da23cad6 [2022-11-03 01:40:47,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:40:47,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:40:47,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:40:47,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:40:47,476 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:40:47,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c [2022-11-03 01:40:47,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/data/f5cc7adfa/68736b8f774847458d4ee9885645e78e/FLAGce56f77d0 [2022-11-03 01:40:48,623 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:40:48,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c [2022-11-03 01:40:48,673 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/data/f5cc7adfa/68736b8f774847458d4ee9885645e78e/FLAGce56f77d0 [2022-11-03 01:40:48,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/data/f5cc7adfa/68736b8f774847458d4ee9885645e78e [2022-11-03 01:40:48,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:40:48,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:40:48,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:48,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:40:48,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:40:48,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:48" (1/1) ... [2022-11-03 01:40:48,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c1ac56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:48, skipping insertion in model container [2022-11-03 01:40:48,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:48" (1/1) ... [2022-11-03 01:40:48,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:40:49,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:40:51,661 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_be6a52e1-6855-4188-9c8b-87599d3ac66c/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c[377069,377082] [2022-11-03 01:40:51,701 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_be6a52e1-6855-4188-9c8b-87599d3ac66c/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c[383339,383352] [2022-11-03 01:40:52,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:52,129 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:40:53,346 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_be6a52e1-6855-4188-9c8b-87599d3ac66c/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c[377069,377082] [2022-11-03 01:40:53,359 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_be6a52e1-6855-4188-9c8b-87599d3ac66c/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c[383339,383352] [2022-11-03 01:40:53,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:53,498 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:40:53,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53 WrapperNode [2022-11-03 01:40:53,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:53,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:53,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:40:53,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:40:53,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:53,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,064 INFO L138 Inliner]: procedures = 68, calls = 77, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 13199 [2022-11-03 01:40:54,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:54,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:40:54,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:40:54,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:40:54,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,461 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:40:54,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:40:54,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:40:54,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:40:54,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (1/1) ... [2022-11-03 01:40:54,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:54,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:54,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:40:54,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:40:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:40:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 01:40:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 01:40:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:40:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:40:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 01:40:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 01:40:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 01:40:54,821 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 01:40:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 01:40:54,821 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 01:40:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 01:40:54,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 01:40:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:40:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:40:54,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:40:55,091 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:40:55,094 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:41:04,502 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:41:07,463 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:41:07,463 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-03 01:41:07,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:07 BoogieIcfgContainer [2022-11-03 01:41:07,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:41:07,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:41:07,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:41:07,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:41:07,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:40:48" (1/3) ... [2022-11-03 01:41:07,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4535f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:07, skipping insertion in model container [2022-11-03 01:41:07,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:53" (2/3) ... [2022-11-03 01:41:07,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4535f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:07, skipping insertion in model container [2022-11-03 01:41:07,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:07" (3/3) ... [2022-11-03 01:41:07,477 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.12.cil-2.c [2022-11-03 01:41:07,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:41:07,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:41:07,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:41:07,604 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;@d021fd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:41:07,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 01:41:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 1831 states, 1796 states have (on average 1.9560133630289531) internal successors, (3513), 1799 states have internal predecessors, (3513), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-03 01:41:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:41:07,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:07,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:07,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1783080916, now seen corresponding path program 1 times [2022-11-03 01:41:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:07,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259635198] [2022-11-03 01:41:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:07,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:08,202 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 01:41:08,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259635198] [2022-11-03 01:41:08,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259635198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:08,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:08,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:41:08,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197539754] [2022-11-03 01:41:08,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:08,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:08,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:08,258 INFO L87 Difference]: Start difference. First operand has 1831 states, 1796 states have (on average 1.9560133630289531) internal successors, (3513), 1799 states have internal predecessors, (3513), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 01:41:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:09,494 INFO L93 Difference]: Finished difference Result 3833 states and 7427 transitions. [2022-11-03 01:41:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:41:09,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 67 [2022-11-03 01:41:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:09,525 INFO L225 Difference]: With dead ends: 3833 [2022-11-03 01:41:09,525 INFO L226 Difference]: Without dead ends: 2001 [2022-11-03 01:41:09,533 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 01:41:09,537 INFO L413 NwaCegarLoop]: 3511 mSDtfsCounter, 3779 mSDsluCounter, 3721 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3779 SdHoareTripleChecker+Valid, 6924 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:09,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3779 Valid, 6924 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:41:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-11-03 01:41:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 2000. [2022-11-03 01:41:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1938 states have (on average 1.9195046439628483) internal successors, (3720), 1941 states have internal predecessors, (3720), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-03 01:41:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 3816 transitions. [2022-11-03 01:41:09,674 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 3816 transitions. Word has length 67 [2022-11-03 01:41:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:09,676 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 3816 transitions. [2022-11-03 01:41:09,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 01:41:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 3816 transitions. [2022-11-03 01:41:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:41:09,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:09,693 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:09,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:41:09,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash 905646151, now seen corresponding path program 1 times [2022-11-03 01:41:09,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:09,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303760807] [2022-11-03 01:41:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:10,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:10,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303760807] [2022-11-03 01:41:10,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303760807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:10,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650362777] [2022-11-03 01:41:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:10,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:10,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:10,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:10,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:41:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:10,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:10,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:41:10,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:10,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650362777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:10,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:10,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12028255] [2022-11-03 01:41:10,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:10,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:10,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:10,496 INFO L87 Difference]: Start difference. First operand 2000 states and 3816 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 01:41:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:11,072 INFO L93 Difference]: Finished difference Result 2701 states and 4915 transitions. [2022-11-03 01:41:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:11,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 136 [2022-11-03 01:41:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:11,085 INFO L225 Difference]: With dead ends: 2701 [2022-11-03 01:41:11,086 INFO L226 Difference]: Without dead ends: 2347 [2022-11-03 01:41:11,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 01:41:11,090 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 3507 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:11,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3568 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2022-11-03 01:41:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2343. [2022-11-03 01:41:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2227 states have (on average 1.8666367310282892) internal successors, (4157), 2231 states have internal predecessors, (4157), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:41:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4337 transitions. [2022-11-03 01:41:11,175 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4337 transitions. Word has length 136 [2022-11-03 01:41:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:11,176 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 4337 transitions. [2022-11-03 01:41:11,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 01:41:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4337 transitions. [2022-11-03 01:41:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:41:11,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:11,191 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:11,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:11,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:11,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1448726681, now seen corresponding path program 1 times [2022-11-03 01:41:11,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:11,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363300092] [2022-11-03 01:41:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:11,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:11,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363300092] [2022-11-03 01:41:11,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363300092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:11,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794566176] [2022-11-03 01:41:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:11,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:11,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:11,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:11,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:41:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:41:12,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:12,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794566176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:12,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:12,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:12,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621937252] [2022-11-03 01:41:12,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:12,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:12,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:12,190 INFO L87 Difference]: Start difference. First operand 2343 states and 4337 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 01:41:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:12,778 INFO L93 Difference]: Finished difference Result 3724 states and 6496 transitions. [2022-11-03 01:41:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 136 [2022-11-03 01:41:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:12,793 INFO L225 Difference]: With dead ends: 3724 [2022-11-03 01:41:12,794 INFO L226 Difference]: Without dead ends: 3027 [2022-11-03 01:41:12,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 01:41:12,802 INFO L413 NwaCegarLoop]: 3342 mSDtfsCounter, 3525 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:12,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3567 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2022-11-03 01:41:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 3021. [2022-11-03 01:41:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2799 states have (on average 1.7931404072883173) internal successors, (5019), 2805 states have internal predecessors, (5019), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-03 01:41:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5363 transitions. [2022-11-03 01:41:12,934 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5363 transitions. Word has length 136 [2022-11-03 01:41:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:12,934 INFO L495 AbstractCegarLoop]: Abstraction has 3021 states and 5363 transitions. [2022-11-03 01:41:12,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 01:41:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5363 transitions. [2022-11-03 01:41:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:41:12,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:12,941 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:12,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:13,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 01:41:13,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:13,163 INFO L85 PathProgramCache]: Analyzing trace with hash -4995449, now seen corresponding path program 1 times [2022-11-03 01:41:13,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:13,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672096869] [2022-11-03 01:41:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:13,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:13,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:13,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672096869] [2022-11-03 01:41:13,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672096869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:13,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703022209] [2022-11-03 01:41:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:13,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:13,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:13,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:13,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:41:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:13,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:13,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:41:13,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:13,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703022209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:13,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:13,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:13,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549185474] [2022-11-03 01:41:13,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:13,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:13,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:13,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:13,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:13,666 INFO L87 Difference]: Start difference. First operand 3021 states and 5363 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 01:41:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:14,274 INFO L93 Difference]: Finished difference Result 5746 states and 9608 transitions. [2022-11-03 01:41:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 136 [2022-11-03 01:41:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:14,295 INFO L225 Difference]: With dead ends: 5746 [2022-11-03 01:41:14,295 INFO L226 Difference]: Without dead ends: 4371 [2022-11-03 01:41:14,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 01:41:14,303 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3519 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:14,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-11-03 01:41:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4361. [2022-11-03 01:41:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4361 states, 3931 states have (on average 1.709234291528873) internal successors, (6719), 3941 states have internal predecessors, (6719), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-11-03 01:41:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4361 states to 4361 states and 7383 transitions. [2022-11-03 01:41:14,475 INFO L78 Accepts]: Start accepts. Automaton has 4361 states and 7383 transitions. Word has length 136 [2022-11-03 01:41:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:14,475 INFO L495 AbstractCegarLoop]: Abstraction has 4361 states and 7383 transitions. [2022-11-03 01:41:14,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 01:41:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4361 states and 7383 transitions. [2022-11-03 01:41:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:41:14,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:14,484 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:14,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:14,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:14,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash -116836953, now seen corresponding path program 1 times [2022-11-03 01:41:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:14,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038938087] [2022-11-03 01:41:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:14,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038938087] [2022-11-03 01:41:14,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038938087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:14,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393434115] [2022-11-03 01:41:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:14,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:14,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:14,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:14,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:41:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:41:15,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:15,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393434115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:15,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:15,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:15,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46130420] [2022-11-03 01:41:15,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:15,244 INFO L87 Difference]: Start difference. First operand 4361 states and 7383 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 01:41:16,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:16,087 INFO L93 Difference]: Finished difference Result 9742 states and 15732 transitions. [2022-11-03 01:41:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 136 [2022-11-03 01:41:16,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:16,126 INFO L225 Difference]: With dead ends: 9742 [2022-11-03 01:41:16,126 INFO L226 Difference]: Without dead ends: 7027 [2022-11-03 01:41:16,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 01:41:16,142 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 3528 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 3565 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:16,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 3565 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7027 states. [2022-11-03 01:41:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7027 to 7009. [2022-11-03 01:41:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 6171 states have (on average 1.631988332523092) internal successors, (10071), 6189 states have internal predecessors, (10071), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-11-03 01:41:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 11359 transitions. [2022-11-03 01:41:16,473 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 11359 transitions. Word has length 136 [2022-11-03 01:41:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:16,473 INFO L495 AbstractCegarLoop]: Abstraction has 7009 states and 11359 transitions. [2022-11-03 01:41:16,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 01:41:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 11359 transitions. [2022-11-03 01:41:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:41:16,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:16,489 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:16,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 01:41:16,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:16,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:16,712 INFO L85 PathProgramCache]: Analyzing trace with hash 277793415, now seen corresponding path program 1 times [2022-11-03 01:41:16,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:16,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856196690] [2022-11-03 01:41:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:16,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:16,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:16,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856196690] [2022-11-03 01:41:16,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856196690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:16,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641403940] [2022-11-03 01:41:16,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:16,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:16,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:16,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:41:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:17,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:41:17,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:17,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641403940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:17,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:17,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:17,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659113655] [2022-11-03 01:41:17,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:17,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:17,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:17,229 INFO L87 Difference]: Start difference. First operand 7009 states and 11359 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 01:41:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:18,068 INFO L93 Difference]: Finished difference Result 17638 states and 27780 transitions. [2022-11-03 01:41:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:18,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 136 [2022-11-03 01:41:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:18,261 INFO L225 Difference]: With dead ends: 17638 [2022-11-03 01:41:18,261 INFO L226 Difference]: Without dead ends: 12275 [2022-11-03 01:41:18,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 01:41:18,285 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3498 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3498 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:18,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3498 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12275 states. [2022-11-03 01:41:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12275 to 12241. [2022-11-03 01:41:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12241 states, 10603 states have (on average 1.5730453645194755) internal successors, (16679), 10637 states have internal predecessors, (16679), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-11-03 01:41:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12241 states to 12241 states and 19183 transitions. [2022-11-03 01:41:19,000 INFO L78 Accepts]: Start accepts. Automaton has 12241 states and 19183 transitions. Word has length 136 [2022-11-03 01:41:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:19,002 INFO L495 AbstractCegarLoop]: Abstraction has 12241 states and 19183 transitions. [2022-11-03 01:41:19,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 01:41:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 12241 states and 19183 transitions. [2022-11-03 01:41:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:41:19,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:19,029 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:19,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:19,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:19,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:19,243 INFO L85 PathProgramCache]: Analyzing trace with hash -189913241, now seen corresponding path program 1 times [2022-11-03 01:41:19,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:19,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798639591] [2022-11-03 01:41:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:19,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:19,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:19,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798639591] [2022-11-03 01:41:19,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798639591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:19,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730805871] [2022-11-03 01:41:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:19,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:19,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:41:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:19,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:41:19,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:19,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730805871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:19,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:19,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926065430] [2022-11-03 01:41:19,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:19,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:19,849 INFO L87 Difference]: Start difference. First operand 12241 states and 19183 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 01:41:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:21,326 INFO L93 Difference]: Finished difference Result 33238 states and 51476 transitions. [2022-11-03 01:41:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:21,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 136 [2022-11-03 01:41:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:21,425 INFO L225 Difference]: With dead ends: 33238 [2022-11-03 01:41:21,425 INFO L226 Difference]: Without dead ends: 22643 [2022-11-03 01:41:21,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 01:41:21,461 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3501 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:21,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22643 states. [2022-11-03 01:41:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22643 to 22577. [2022-11-03 01:41:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22577 states, 19371 states have (on average 1.533374632182128) internal successors, (29703), 19437 states have internal predecessors, (29703), 2436 states have call successors, (2436), 768 states have call predecessors, (2436), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-11-03 01:41:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22577 states to 22577 states and 34575 transitions. [2022-11-03 01:41:22,568 INFO L78 Accepts]: Start accepts. Automaton has 22577 states and 34575 transitions. Word has length 136 [2022-11-03 01:41:22,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:22,568 INFO L495 AbstractCegarLoop]: Abstraction has 22577 states and 34575 transitions. [2022-11-03 01:41:22,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 01:41:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 22577 states and 34575 transitions. [2022-11-03 01:41:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:41:22,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:22,616 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:22,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:22,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:22,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:22,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:22,831 INFO L85 PathProgramCache]: Analyzing trace with hash -764993913, now seen corresponding path program 1 times [2022-11-03 01:41:22,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:22,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940044120] [2022-11-03 01:41:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:22,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:23,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:23,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940044120] [2022-11-03 01:41:23,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940044120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:23,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091933418] [2022-11-03 01:41:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:23,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:23,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:23,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:41:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:23,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:41:23,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091933418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:23,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:23,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724531623] [2022-11-03 01:41:23,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:23,402 INFO L87 Difference]: Start difference. First operand 22577 states and 34575 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 01:41:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:25,326 INFO L93 Difference]: Finished difference Result 64054 states and 98068 transitions. [2022-11-03 01:41:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 136 [2022-11-03 01:41:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:25,529 INFO L225 Difference]: With dead ends: 64054 [2022-11-03 01:41:25,530 INFO L226 Difference]: Without dead ends: 43123 [2022-11-03 01:41:25,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 01:41:25,611 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3513 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:25,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43123 states. [2022-11-03 01:41:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43123 to 42993. [2022-11-03 01:41:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42993 states, 36715 states have (on average 1.5080212447228654) internal successors, (55367), 36845 states have internal predecessors, (55367), 4740 states have call successors, (4740), 1536 states have call predecessors, (4740), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-11-03 01:41:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42993 states to 42993 states and 64847 transitions. [2022-11-03 01:41:28,135 INFO L78 Accepts]: Start accepts. Automaton has 42993 states and 64847 transitions. Word has length 136 [2022-11-03 01:41:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:28,135 INFO L495 AbstractCegarLoop]: Abstraction has 42993 states and 64847 transitions. [2022-11-03 01:41:28,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 01:41:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 42993 states and 64847 transitions. [2022-11-03 01:41:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:41:28,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:28,227 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:28,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:28,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6a52e1-6855-4188-9c8b-87599d3ac66c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 01:41:28,435 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash 398878119, now seen corresponding path program 1 times [2022-11-03 01:41:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:28,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121223786] [2022-11-03 01:41:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:28,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 01:41:29,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:29,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121223786] [2022-11-03 01:41:29,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121223786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:29,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:29,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:41:29,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783525235] [2022-11-03 01:41:29,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:29,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:29,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:29,445 INFO L87 Difference]: Start difference. First operand 42993 states and 64847 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 01:41:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:35,023 INFO L93 Difference]: Finished difference Result 146421 states and 218578 transitions. [2022-11-03 01:41:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:41:35,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 136 [2022-11-03 01:41:35,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:35,856 INFO L225 Difference]: With dead ends: 146421 [2022-11-03 01:41:35,857 INFO L226 Difference]: Without dead ends: 105075 [2022-11-03 01:41:36,004 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 01:41:36,005 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 4328 mSDsluCounter, 10516 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4349 SdHoareTripleChecker+Valid, 13067 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:36,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4349 Valid, 13067 Invalid, 1375 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [146 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:41:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105075 states. [2022-11-03 01:41:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105075 to 82801. [2022-11-03 01:41:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82801 states, 70507 states have (on average 1.4914689321627639) internal successors, (105159), 70765 states have internal predecessors, (105159), 9220 states have call successors, (9220), 3072 states have call predecessors, (9220), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-11-03 01:41:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82801 states to 82801 states and 123599 transitions. [2022-11-03 01:41:41,523 INFO L78 Accepts]: Start accepts. Automaton has 82801 states and 123599 transitions. Word has length 136 [2022-11-03 01:41:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:41,524 INFO L495 AbstractCegarLoop]: Abstraction has 82801 states and 123599 transitions. [2022-11-03 01:41:41,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 01:41:41,525 INFO L276 IsEmpty]: Start isEmpty. Operand 82801 states and 123599 transitions. [2022-11-03 01:41:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 01:41:41,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:41,754 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:41,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:41:41,755 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1068907572, now seen corresponding path program 1 times [2022-11-03 01:41:41,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:41,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615404105] [2022-11-03 01:41:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:41,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 01:41:42,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:42,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615404105] [2022-11-03 01:41:42,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615404105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:42,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:42,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:41:42,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695468629] [2022-11-03 01:41:42,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:42,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:42,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:42,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:42,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:42,472 INFO L87 Difference]: Start difference. First operand 82801 states and 123599 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 01:41:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:50,870 INFO L93 Difference]: Finished difference Result 222197 states and 331089 transitions. [2022-11-03 01:41:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:41:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 137 [2022-11-03 01:41:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:51,353 INFO L225 Difference]: With dead ends: 222197 [2022-11-03 01:41:51,353 INFO L226 Difference]: Without dead ends: 141043 [2022-11-03 01:41:51,569 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 01:41:51,570 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 4182 mSDsluCounter, 10618 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4188 SdHoareTripleChecker+Valid, 13151 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:51,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4188 Valid, 13151 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 01:41:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141043 states.