./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.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_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/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_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/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_eac419fb-63af-4ec5-81ad-e0a7fc6576de/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 5ee0afe9c2a2e5e350a29156a4a7c18a224cec42ab7ff37fc9f10d35d9e173ae --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:27:56,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:27:56,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:27:57,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:27:57,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:27:57,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:27:57,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:27:57,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:27:57,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:27:57,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:27:57,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:27:57,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:27:57,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:27:57,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:27:57,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:27:57,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:27:57,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:27:57,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:27:57,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:27:57,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:27:57,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:27:57,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:27:57,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:27:57,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:27:57,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:27:57,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:27:57,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:27:57,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:27:57,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:27:57,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:27:57,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:27:57,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:27:57,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:27:57,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:27:57,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:27:57,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:27:57,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:27:57,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:27:57,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:27:57,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:27:57,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:27:57,089 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:27:57,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:27:57,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:27:57,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:27:57,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:27:57,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:27:57,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:27:57,130 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:27:57,130 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:27:57,130 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:27:57,131 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:27:57,132 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:27:57,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:27:57,132 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:27:57,132 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:27:57,133 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:27:57,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:27:57,133 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:27:57,133 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:27:57,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:27:57,134 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:27:57,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:27:57,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:27:57,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:27:57,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:27:57,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:27:57,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:27:57,137 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:27:57,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:27:57,138 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:27:57,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:27:57,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:27:57,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:27:57,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:57,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:27:57,140 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:27:57,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:27:57,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:27:57,140 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:27:57,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:27:57,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:27:57,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:27:57,141 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_eac419fb-63af-4ec5-81ad-e0a7fc6576de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee0afe9c2a2e5e350a29156a4a7c18a224cec42ab7ff37fc9f10d35d9e173ae [2022-11-03 02:27:57,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:27:57,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:27:57,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:27:57,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:27:57,416 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:27:57,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c [2022-11-03 02:27:57,499 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/data/e2b93baa1/39c27550931847c3af320f7a3ad3129f/FLAG01035f707 [2022-11-03 02:27:58,563 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:27:58,564 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c [2022-11-03 02:27:58,611 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/data/e2b93baa1/39c27550931847c3af320f7a3ad3129f/FLAG01035f707 [2022-11-03 02:27:58,913 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/data/e2b93baa1/39c27550931847c3af320f7a3ad3129f [2022-11-03 02:27:58,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:27:58,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:27:58,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:58,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:27:58,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:27:58,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:58" (1/1) ... [2022-11-03 02:27:58,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f2f274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:58, skipping insertion in model container [2022-11-03 02:27:58,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:58" (1/1) ... [2022-11-03 02:27:58,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:27:59,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:28:01,736 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_eac419fb-63af-4ec5-81ad-e0a7fc6576de/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[382357,382370] [2022-11-03 02:28:01,765 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_eac419fb-63af-4ec5-81ad-e0a7fc6576de/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[383339,383352] [2022-11-03 02:28:01,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:28:02,000 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:28:03,199 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_eac419fb-63af-4ec5-81ad-e0a7fc6576de/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[382357,382370] [2022-11-03 02:28:03,202 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_eac419fb-63af-4ec5-81ad-e0a7fc6576de/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[383339,383352] [2022-11-03 02:28:03,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:28:03,324 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:28:03,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03 WrapperNode [2022-11-03 02:28:03,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:28:03,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:28:03,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:28:03,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:28:03,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:03,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:03,936 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2022-11-03 02:28:03,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:28:03,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:28:03,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:28:03,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:28:03,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:03,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:04,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:04,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:04,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:04,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:04,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:04,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:04,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:28:04,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:28:04,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:28:04,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:28:04,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (1/1) ... [2022-11-03 02:28:04,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:28:04,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:04,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:28:04,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:28:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:28:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:28:04,497 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:28:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:28:04,497 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:28:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:28:04,497 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:28:04,498 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:28:04,498 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:28:04,498 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:28:04,498 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:28:04,498 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:28:04,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:28:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:28:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:28:04,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:28:04,614 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:28:04,616 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:28:14,066 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:28:16,548 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:28:16,549 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-03 02:28:16,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:16 BoogieIcfgContainer [2022-11-03 02:28:16,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:28:16,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:28:16,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:28:16,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:28:16,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:27:58" (1/3) ... [2022-11-03 02:28:16,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7d1974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:28:16, skipping insertion in model container [2022-11-03 02:28:16,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:03" (2/3) ... [2022-11-03 02:28:16,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7d1974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:28:16, skipping insertion in model container [2022-11-03 02:28:16,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:16" (3/3) ... [2022-11-03 02:28:16,569 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.05.cil-1.c [2022-11-03 02:28:16,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:28:16,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:28:16,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:28:16,755 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;@285f6f97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:28:16,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:28:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-03 02:28:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:28:16,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:16,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:16,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash 529288735, now seen corresponding path program 1 times [2022-11-03 02:28:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:16,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774166741] [2022-11-03 02:28:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:16,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:17,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774166741] [2022-11-03 02:28:17,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774166741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:17,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:17,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:28:17,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991649399] [2022-11-03 02:28:17,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:28:17,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:28:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:17,234 INFO L87 Difference]: Start difference. First operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:28:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:18,181 INFO L93 Difference]: Finished difference Result 3602 states and 7035 transitions. [2022-11-03 02:28:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:28:18,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 46 [2022-11-03 02:28:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:18,205 INFO L225 Difference]: With dead ends: 3602 [2022-11-03 02:28:18,205 INFO L226 Difference]: Without dead ends: 1847 [2022-11-03 02:28:18,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:18,216 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3548 mSDsluCounter, 3497 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:18,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3548 Valid, 6532 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:28:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-11-03 02:28:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846. [2022-11-03 02:28:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1798 states have (on average 1.9443826473859844) internal successors, (3496), 1801 states have internal predecessors, (3496), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 02:28:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3564 transitions. [2022-11-03 02:28:18,372 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3564 transitions. Word has length 46 [2022-11-03 02:28:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:18,374 INFO L495 AbstractCegarLoop]: Abstraction has 1846 states and 3564 transitions. [2022-11-03 02:28:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:28:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3564 transitions. [2022-11-03 02:28:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:28:18,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:18,389 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:18,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:28:18,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1545352987, now seen corresponding path program 1 times [2022-11-03 02:28:18,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:18,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901620781] [2022-11-03 02:28:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:18,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:28:18,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:18,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901620781] [2022-11-03 02:28:18,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901620781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:18,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559960351] [2022-11-03 02:28:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:18,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:18,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:18,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:18,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:28:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:28:18,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:28:18,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:18,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559960351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:18,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:18,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:28:18,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108295062] [2022-11-03 02:28:18,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:18,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:18,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:18,890 INFO L87 Difference]: Start difference. First operand 1846 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:28:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:19,366 INFO L93 Difference]: Finished difference Result 2239 states and 4145 transitions. [2022-11-03 02:28:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 87 [2022-11-03 02:28:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:19,381 INFO L225 Difference]: With dead ends: 2239 [2022-11-03 02:28:19,382 INFO L226 Difference]: Without dead ends: 2039 [2022-11-03 02:28:19,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:19,385 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3393 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:19,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:28:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2022-11-03 02:28:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2035. [2022-11-03 02:28:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1947 states have (on average 1.9049820236260915) internal successors, (3709), 1951 states have internal predecessors, (3709), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-03 02:28:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3833 transitions. [2022-11-03 02:28:19,460 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3833 transitions. Word has length 87 [2022-11-03 02:28:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:19,461 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 3833 transitions. [2022-11-03 02:28:19,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:28:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3833 transitions. [2022-11-03 02:28:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:28:19,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:19,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:19,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:19,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:19,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash 516281117, now seen corresponding path program 1 times [2022-11-03 02:28:19,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:19,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126270704] [2022-11-03 02:28:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:19,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:28:19,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:19,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126270704] [2022-11-03 02:28:19,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126270704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:19,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734564539] [2022-11-03 02:28:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:19,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:19,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:19,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:28:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:28:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:28:20,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:20,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734564539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:20,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:20,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:28:20,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119628110] [2022-11-03 02:28:20,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:20,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:20,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:20,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:20,124 INFO L87 Difference]: Start difference. First operand 2035 states and 3833 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:28:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:20,734 INFO L93 Difference]: Finished difference Result 2800 states and 4956 transitions. [2022-11-03 02:28:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:20,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 87 [2022-11-03 02:28:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:20,746 INFO L225 Difference]: With dead ends: 2800 [2022-11-03 02:28:20,747 INFO L226 Difference]: Without dead ends: 2411 [2022-11-03 02:28:20,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:20,750 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 3402 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:20,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 3343 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:28:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-11-03 02:28:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2405. [2022-11-03 02:28:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2239 states have (on average 1.8414470745868692) internal successors, (4123), 2245 states have internal predecessors, (4123), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-03 02:28:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4355 transitions. [2022-11-03 02:28:20,833 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4355 transitions. Word has length 87 [2022-11-03 02:28:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:20,834 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 4355 transitions. [2022-11-03 02:28:20,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:28:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4355 transitions. [2022-11-03 02:28:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:28:20,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:20,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:20,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:21,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:21,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash -205612709, now seen corresponding path program 1 times [2022-11-03 02:28:21,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:21,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063286717] [2022-11-03 02:28:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:21,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:28:21,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:21,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063286717] [2022-11-03 02:28:21,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063286717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:21,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168665978] [2022-11-03 02:28:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:21,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:21,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:21,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:21,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:28:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:28:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:28:21,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:21,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168665978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:21,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:21,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:28:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357926117] [2022-11-03 02:28:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:21,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:21,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:21,548 INFO L87 Difference]: Start difference. First operand 2405 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:28:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:22,057 INFO L93 Difference]: Finished difference Result 3898 states and 6528 transitions. [2022-11-03 02:28:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:22,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 87 [2022-11-03 02:28:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:22,073 INFO L225 Difference]: With dead ends: 3898 [2022-11-03 02:28:22,074 INFO L226 Difference]: Without dead ends: 3139 [2022-11-03 02:28:22,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:22,078 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 3399 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:22,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:28:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2022-11-03 02:28:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2022-11-03 02:28:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2811 states have (on average 1.7527570259694059) internal successors, (4927), 2821 states have internal predecessors, (4927), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-11-03 02:28:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5367 transitions. [2022-11-03 02:28:22,194 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5367 transitions. Word has length 87 [2022-11-03 02:28:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:22,195 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 5367 transitions. [2022-11-03 02:28:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:28:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5367 transitions. [2022-11-03 02:28:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:28:22,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:22,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:22,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:22,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:22,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:22,415 INFO L85 PathProgramCache]: Analyzing trace with hash 160410589, now seen corresponding path program 1 times [2022-11-03 02:28:22,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:22,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568475852] [2022-11-03 02:28:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:22,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:28:22,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:22,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568475852] [2022-11-03 02:28:22,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568475852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:22,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:22,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:28:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242486803] [2022-11-03 02:28:22,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:22,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:22,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:22,539 INFO L87 Difference]: Start difference. First operand 3129 states and 5367 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:28:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:23,130 INFO L93 Difference]: Finished difference Result 4283 states and 7048 transitions. [2022-11-03 02:28:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-11-03 02:28:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:23,149 INFO L225 Difference]: With dead ends: 4283 [2022-11-03 02:28:23,149 INFO L226 Difference]: Without dead ends: 3521 [2022-11-03 02:28:23,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:23,155 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 64 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6442 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:23,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6442 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:28:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-11-03 02:28:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 3373. [2022-11-03 02:28:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3039 states have (on average 1.7476143468246133) internal successors, (5311), 3049 states have internal predecessors, (5311), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-11-03 02:28:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 5767 transitions. [2022-11-03 02:28:23,314 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 5767 transitions. Word has length 87 [2022-11-03 02:28:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:23,317 INFO L495 AbstractCegarLoop]: Abstraction has 3373 states and 5767 transitions. [2022-11-03 02:28:23,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:28:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 5767 transitions. [2022-11-03 02:28:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:28:23,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:23,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:28:23,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1065518548, now seen corresponding path program 1 times [2022-11-03 02:28:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:23,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747904228] [2022-11-03 02:28:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:28:23,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747904228] [2022-11-03 02:28:23,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747904228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:23,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:23,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:28:23,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256676402] [2022-11-03 02:28:23,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:23,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:23,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:23,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:23,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:23,431 INFO L87 Difference]: Start difference. First operand 3373 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:28:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:23,979 INFO L93 Difference]: Finished difference Result 6754 states and 10724 transitions. [2022-11-03 02:28:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:23,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-03 02:28:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:24,001 INFO L225 Difference]: With dead ends: 6754 [2022-11-03 02:28:24,001 INFO L226 Difference]: Without dead ends: 5027 [2022-11-03 02:28:24,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:24,009 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 3393 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:24,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3320 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:28:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2022-11-03 02:28:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5001. [2022-11-03 02:28:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 4355 states have (on average 1.6512055109070034) internal successors, (7191), 4373 states have internal predecessors, (7191), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-11-03 02:28:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 8063 transitions. [2022-11-03 02:28:24,380 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 8063 transitions. Word has length 116 [2022-11-03 02:28:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:24,381 INFO L495 AbstractCegarLoop]: Abstraction has 5001 states and 8063 transitions. [2022-11-03 02:28:24,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:28:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 8063 transitions. [2022-11-03 02:28:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:28:24,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:24,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:24,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:28:24,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash 547356783, now seen corresponding path program 1 times [2022-11-03 02:28:24,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:24,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508189550] [2022-11-03 02:28:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:24,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:28:24,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:24,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508189550] [2022-11-03 02:28:24,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508189550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:24,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:24,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:28:24,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150828865] [2022-11-03 02:28:24,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:24,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:24,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:24,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:24,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:24,497 INFO L87 Difference]: Start difference. First operand 5001 states and 8063 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:28:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:25,379 INFO L93 Difference]: Finished difference Result 11566 states and 17572 transitions. [2022-11-03 02:28:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-03 02:28:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:25,426 INFO L225 Difference]: With dead ends: 11566 [2022-11-03 02:28:25,434 INFO L226 Difference]: Without dead ends: 8211 [2022-11-03 02:28:25,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:25,451 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3396 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3396 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:25,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3396 Valid, 3334 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:28:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2022-11-03 02:28:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 8161. [2022-11-03 02:28:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 6907 states have (on average 1.5623280729694513) internal successors, (10791), 6941 states have internal predecessors, (10791), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-11-03 02:28:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 12463 transitions. [2022-11-03 02:28:26,015 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 12463 transitions. Word has length 116 [2022-11-03 02:28:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:26,016 INFO L495 AbstractCegarLoop]: Abstraction has 8161 states and 12463 transitions. [2022-11-03 02:28:26,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:28:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 12463 transitions. [2022-11-03 02:28:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:28:26,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:26,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 02:28:26,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:28:26,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2082414231, now seen corresponding path program 1 times [2022-11-03 02:28:26,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:26,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124096749] [2022-11-03 02:28:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 02:28:26,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124096749] [2022-11-03 02:28:26,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124096749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279532045] [2022-11-03 02:28:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:26,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:26,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:28:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:28:26,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:28:26,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:26,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279532045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:26,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:26,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:28:26,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552405526] [2022-11-03 02:28:26,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:26,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:26,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:26,474 INFO L87 Difference]: Start difference. First operand 8161 states and 12463 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:28:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:27,522 INFO L93 Difference]: Finished difference Result 13957 states and 20833 transitions. [2022-11-03 02:28:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:27,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-11-03 02:28:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:27,582 INFO L225 Difference]: With dead ends: 13957 [2022-11-03 02:28:27,582 INFO L226 Difference]: Without dead ends: 10627 [2022-11-03 02:28:27,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:27,597 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 95 mSDsluCounter, 3426 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6468 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:27,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6468 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:28:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2022-11-03 02:28:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 9393. [2022-11-03 02:28:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9393 states, 8043 states have (on average 1.5744125326370757) internal successors, (12663), 8077 states have internal predecessors, (12663), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-11-03 02:28:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9393 states to 9393 states and 14431 transitions. [2022-11-03 02:28:28,124 INFO L78 Accepts]: Start accepts. Automaton has 9393 states and 14431 transitions. Word has length 134 [2022-11-03 02:28:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:28,126 INFO L495 AbstractCegarLoop]: Abstraction has 9393 states and 14431 transitions. [2022-11-03 02:28:28,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:28:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 9393 states and 14431 transitions. [2022-11-03 02:28:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:28:28,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:28,151 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 02:28:28,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:28,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:28:28,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash -483818852, now seen corresponding path program 2 times [2022-11-03 02:28:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:28,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630153833] [2022-11-03 02:28:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:28,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:28:28,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:28,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630153833] [2022-11-03 02:28:28,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630153833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:28,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050487111] [2022-11-03 02:28:28,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:28:28,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:28,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:28,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:28,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eac419fb-63af-4ec5-81ad-e0a7fc6576de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:28:28,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:28:28,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:28:28,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:28:28,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:28:29,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:28:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050487111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895389510] [2022-11-03 02:28:29,730 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-03 02:28:29,730 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:29,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:29,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:29,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:00,071 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-11-03 02:29:00,117 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-03 02:29:07,819 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12