./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9 --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 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 --- 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-6b4ec56 [2022-11-20 21:15:16,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:15:16,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:15:16,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:15:16,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:15:16,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:15:16,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:15:16,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:15:16,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:15:16,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:15:16,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:15:16,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:15:16,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:15:16,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:15:16,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:15:16,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:15:16,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:15:16,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:15:16,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:15:16,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:15:16,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:15:16,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:15:16,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:15:16,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:15:17,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:15:17,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:15:17,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:15:17,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:15:17,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:15:17,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:15:17,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:15:17,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:15:17,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:15:17,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:15:17,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:15:17,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:15:17,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:15:17,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:15:17,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:15:17,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:15:17,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:15:17,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:15:17,058 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:15:17,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:15:17,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:15:17,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:15:17,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:15:17,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:15:17,061 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:15:17,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:15:17,062 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:15:17,062 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:15:17,063 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:15:17,063 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:15:17,063 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:15:17,064 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:15:17,064 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:15:17,064 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:15:17,064 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:15:17,065 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:15:17,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:15:17,066 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:15:17,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:15:17,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:15:17,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:15:17,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:15:17,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:15:17,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:15:17,068 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:15:17,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:15:17,068 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:15:17,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:15:17,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:15:17,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:15:17,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:15:17,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:15:17,070 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:15:17,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:15:17,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:15:17,071 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:15:17,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:15:17,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:15:17,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:15:17,072 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_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 [2022-11-20 21:15:17,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:15:17,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:15:17,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:15:17,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:15:17,423 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:15:17,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-11-20 21:15:20,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:15:20,797 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:15:20,798 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-11-20 21:15:20,809 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/data/6734b79cd/3f0df2cefd3d4784840d8846bb02f4cb/FLAGeaf84185d [2022-11-20 21:15:20,823 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/data/6734b79cd/3f0df2cefd3d4784840d8846bb02f4cb [2022-11-20 21:15:20,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:15:20,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:15:20,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:15:20,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:15:20,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:15:20,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:15:20" (1/1) ... [2022-11-20 21:15:20,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e6b783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:20, skipping insertion in model container [2022-11-20 21:15:20,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:15:20" (1/1) ... [2022-11-20 21:15:20,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:15:20,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:15:21,036 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-11-20 21:15:21,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:15:21,163 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:15:21,173 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-11-20 21:15:21,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:15:21,221 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:15:21,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21 WrapperNode [2022-11-20 21:15:21,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:15:21,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:15:21,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:15:21,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:15:21,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,319 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 331 [2022-11-20 21:15:21,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:15:21,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:15:21,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:15:21,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:15:21,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,379 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:15:21,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:15:21,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:15:21,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:15:21,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (1/1) ... [2022-11-20 21:15:21,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:15:21,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:21,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:15:21,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:15:21,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:15:21,480 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-20 21:15:21,481 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-20 21:15:21,481 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-20 21:15:21,481 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-20 21:15:21,481 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 21:15:21,481 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 21:15:21,481 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-20 21:15:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-20 21:15:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-20 21:15:21,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-20 21:15:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:15:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-20 21:15:21,483 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-20 21:15:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:15:21,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:15:21,602 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:15:21,604 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:15:22,185 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:15:22,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:15:22,419 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 21:15:22,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:15:22 BoogieIcfgContainer [2022-11-20 21:15:22,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:15:22,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:15:22,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:15:22,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:15:22,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:15:20" (1/3) ... [2022-11-20 21:15:22,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8f14c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:15:22, skipping insertion in model container [2022-11-20 21:15:22,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:21" (2/3) ... [2022-11-20 21:15:22,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8f14c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:15:22, skipping insertion in model container [2022-11-20 21:15:22,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:15:22" (3/3) ... [2022-11-20 21:15:22,439 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-2.c [2022-11-20 21:15:22,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:15:22,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:15:22,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:15:22,532 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;@5032f1d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:15:22,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:15:22,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 64 states have (on average 1.5) internal successors, (96), 66 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-20 21:15:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 21:15:22,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:22,548 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] [2022-11-20 21:15:22,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash 988164258, now seen corresponding path program 1 times [2022-11-20 21:15:22,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:22,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019343184] [2022-11-20 21:15:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:22,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:22,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:22,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019343184] [2022-11-20 21:15:22,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019343184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:22,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:22,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:15:22,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493432617] [2022-11-20 21:15:22,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:22,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:15:22,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:23,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:15:23,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:15:23,028 INFO L87 Difference]: Start difference. First operand has 89 states, 64 states have (on average 1.5) internal successors, (96), 66 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-11-20 21:15:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:23,442 INFO L93 Difference]: Finished difference Result 251 states and 373 transitions. [2022-11-20 21:15:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:15:23,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 39 [2022-11-20 21:15:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:23,465 INFO L225 Difference]: With dead ends: 251 [2022-11-20 21:15:23,465 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 21:15:23,469 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 [2022-11-20 21:15:23,482 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 215 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:23,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 306 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:15:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 21:15:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-11-20 21:15:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 119 states have (on average 1.411764705882353) internal successors, (168), 121 states have internal predecessors, (168), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-20 21:15:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 228 transitions. [2022-11-20 21:15:23,582 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 228 transitions. Word has length 39 [2022-11-20 21:15:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:23,583 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 228 transitions. [2022-11-20 21:15:23,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-11-20 21:15:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 228 transitions. [2022-11-20 21:15:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 21:15:23,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:23,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:23,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:15:23,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash 39532403, now seen corresponding path program 1 times [2022-11-20 21:15:23,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:23,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981295756] [2022-11-20 21:15:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:23,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 21:15:23,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981295756] [2022-11-20 21:15:23,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981295756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883042636] [2022-11-20 21:15:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:23,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:23,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:23,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:23,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:15:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:15:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:15:24,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:24,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883042636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:24,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:24,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-20 21:15:24,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276604734] [2022-11-20 21:15:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:24,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:24,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:24,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:15:24,055 INFO L87 Difference]: Start difference. First operand 162 states and 228 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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) [2022-11-20 21:15:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:24,168 INFO L93 Difference]: Finished difference Result 469 states and 669 transitions. [2022-11-20 21:15:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:24,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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 72 [2022-11-20 21:15:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:24,173 INFO L225 Difference]: With dead ends: 469 [2022-11-20 21:15:24,173 INFO L226 Difference]: Without dead ends: 312 [2022-11-20 21:15:24,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:15:24,176 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 100 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:24,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-20 21:15:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 308. [2022-11-20 21:15:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 229 states have (on average 1.4017467248908297) internal successors, (321), 232 states have internal predecessors, (321), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-20 21:15:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 429 transitions. [2022-11-20 21:15:24,219 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 429 transitions. Word has length 72 [2022-11-20 21:15:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:24,220 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 429 transitions. [2022-11-20 21:15:24,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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) [2022-11-20 21:15:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 429 transitions. [2022-11-20 21:15:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 21:15:24,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:24,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:24,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:24,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:24,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash 686067441, now seen corresponding path program 1 times [2022-11-20 21:15:24,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:24,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655990135] [2022-11-20 21:15:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:24,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 21:15:24,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:24,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655990135] [2022-11-20 21:15:24,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655990135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:24,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135486032] [2022-11-20 21:15:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:24,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:24,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:24,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:24,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:15:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:15:24,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:15:24,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:24,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135486032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:24,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:24,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:15:24,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18621278] [2022-11-20 21:15:24,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:24,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:24,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:24,885 INFO L87 Difference]: Start difference. First operand 308 states and 429 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2022-11-20 21:15:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:25,012 INFO L93 Difference]: Finished difference Result 901 states and 1272 transitions. [2022-11-20 21:15:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 72 [2022-11-20 21:15:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:25,022 INFO L225 Difference]: With dead ends: 901 [2022-11-20 21:15:25,023 INFO L226 Difference]: Without dead ends: 598 [2022-11-20 21:15:25,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:25,034 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 97 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:25,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 225 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:25,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-20 21:15:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 592. [2022-11-20 21:15:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 443 states have (on average 1.3882618510158014) internal successors, (615), 448 states have internal predecessors, (615), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-20 21:15:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 815 transitions. [2022-11-20 21:15:25,121 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 815 transitions. Word has length 72 [2022-11-20 21:15:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:25,122 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 815 transitions. [2022-11-20 21:15:25,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2022-11-20 21:15:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 815 transitions. [2022-11-20 21:15:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 21:15:25,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:25,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:25,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 21:15:25,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:25,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:25,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1192269875, now seen corresponding path program 1 times [2022-11-20 21:15:25,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086705127] [2022-11-20 21:15:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:25,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:15:25,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:25,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086705127] [2022-11-20 21:15:25,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086705127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:25,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:25,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 21:15:25,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694348561] [2022-11-20 21:15:25,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:25,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:15:25,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:25,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:15:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:25,909 INFO L87 Difference]: Start difference. First operand 592 states and 815 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 21:15:26,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:26,368 INFO L93 Difference]: Finished difference Result 1876 states and 2586 transitions. [2022-11-20 21:15:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:15:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 72 [2022-11-20 21:15:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:26,387 INFO L225 Difference]: With dead ends: 1876 [2022-11-20 21:15:26,387 INFO L226 Difference]: Without dead ends: 1290 [2022-11-20 21:15:26,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:15:26,393 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 326 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:26,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 340 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:15:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-11-20 21:15:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1128. [2022-11-20 21:15:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 843 states have (on average 1.3701067615658362) internal successors, (1155), 852 states have internal predecessors, (1155), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-20 21:15:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1531 transitions. [2022-11-20 21:15:26,562 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1531 transitions. Word has length 72 [2022-11-20 21:15:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:26,563 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 1531 transitions. [2022-11-20 21:15:26,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 21:15:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1531 transitions. [2022-11-20 21:15:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 21:15:26,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:26,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:26,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:15:26,567 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1395425187, now seen corresponding path program 1 times [2022-11-20 21:15:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:26,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168514755] [2022-11-20 21:15:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:15:26,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:26,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168514755] [2022-11-20 21:15:26,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168514755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:26,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:26,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 21:15:26,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638794359] [2022-11-20 21:15:26,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:15:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:15:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:26,956 INFO L87 Difference]: Start difference. First operand 1128 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 21:15:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:27,465 INFO L93 Difference]: Finished difference Result 2884 states and 3933 transitions. [2022-11-20 21:15:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:15:27,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-20 21:15:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:27,477 INFO L225 Difference]: With dead ends: 2884 [2022-11-20 21:15:27,477 INFO L226 Difference]: Without dead ends: 1762 [2022-11-20 21:15:27,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:15:27,482 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 297 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:27,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 328 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:15:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-11-20 21:15:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1656. [2022-11-20 21:15:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1235 states have (on average 1.3562753036437247) internal successors, (1675), 1248 states have internal predecessors, (1675), 276 states have call successors, (276), 144 states have call predecessors, (276), 144 states have return successors, (276), 264 states have call predecessors, (276), 276 states have call successors, (276) [2022-11-20 21:15:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2227 transitions. [2022-11-20 21:15:27,710 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2227 transitions. Word has length 73 [2022-11-20 21:15:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:27,711 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2227 transitions. [2022-11-20 21:15:27,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 21:15:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2227 transitions. [2022-11-20 21:15:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 21:15:27,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:27,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:15:27,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash 362479671, now seen corresponding path program 1 times [2022-11-20 21:15:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:27,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559760719] [2022-11-20 21:15:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:15:27,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:27,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559760719] [2022-11-20 21:15:27,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559760719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:27,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:27,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:15:27,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108442794] [2022-11-20 21:15:27,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:27,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:27,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:15:27,792 INFO L87 Difference]: Start difference. First operand 1656 states and 2227 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:15:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:28,059 INFO L93 Difference]: Finished difference Result 2914 states and 3962 transitions. [2022-11-20 21:15:28,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:28,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-20 21:15:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:28,069 INFO L225 Difference]: With dead ends: 2914 [2022-11-20 21:15:28,070 INFO L226 Difference]: Without dead ends: 2064 [2022-11-20 21:15:28,074 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 [2022-11-20 21:15:28,076 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 45 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:28,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 255 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:15:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-11-20 21:15:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1870. [2022-11-20 21:15:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1425 states have (on average 1.3803508771929824) internal successors, (1967), 1438 states have internal predecessors, (1967), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-20 21:15:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2543 transitions. [2022-11-20 21:15:28,273 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2543 transitions. Word has length 74 [2022-11-20 21:15:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:28,273 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2543 transitions. [2022-11-20 21:15:28,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:15:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2543 transitions. [2022-11-20 21:15:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 21:15:28,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:28,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:28,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:15:28,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1643608469, now seen corresponding path program 1 times [2022-11-20 21:15:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:28,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333107673] [2022-11-20 21:15:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:28,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 21:15:28,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333107673] [2022-11-20 21:15:28,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333107673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:28,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:28,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:15:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493094365] [2022-11-20 21:15:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:28,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:28,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:15:28,363 INFO L87 Difference]: Start difference. First operand 1870 states and 2543 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-11-20 21:15:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:28,720 INFO L93 Difference]: Finished difference Result 4662 states and 6380 transitions. [2022-11-20 21:15:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 96 [2022-11-20 21:15:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:28,737 INFO L225 Difference]: With dead ends: 4662 [2022-11-20 21:15:28,737 INFO L226 Difference]: Without dead ends: 2797 [2022-11-20 21:15:28,743 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 [2022-11-20 21:15:28,744 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 93 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:28,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 226 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-20 21:15:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2777. [2022-11-20 21:15:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2118 states have (on average 1.3640226628895185) internal successors, (2889), 2137 states have internal predecessors, (2889), 424 states have call successors, (424), 234 states have call predecessors, (424), 234 states have return successors, (424), 406 states have call predecessors, (424), 424 states have call successors, (424) [2022-11-20 21:15:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3737 transitions. [2022-11-20 21:15:29,002 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3737 transitions. Word has length 96 [2022-11-20 21:15:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:29,005 INFO L495 AbstractCegarLoop]: Abstraction has 2777 states and 3737 transitions. [2022-11-20 21:15:29,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-11-20 21:15:29,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3737 transitions. [2022-11-20 21:15:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 21:15:29,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:29,018 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:29,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 21:15:29,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash -779664507, now seen corresponding path program 1 times [2022-11-20 21:15:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:29,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347094203] [2022-11-20 21:15:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:29,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 21:15:29,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:29,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347094203] [2022-11-20 21:15:29,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347094203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:29,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343224698] [2022-11-20 21:15:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:29,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:29,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:29,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:29,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:15:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:15:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 21:15:29,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:29,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343224698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:29,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:29,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 21:15:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406015984] [2022-11-20 21:15:29,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:29,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:29,330 INFO L87 Difference]: Start difference. First operand 2777 states and 3737 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-20 21:15:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:29,653 INFO L93 Difference]: Finished difference Result 5252 states and 7137 transitions. [2022-11-20 21:15:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:29,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-20 21:15:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:29,671 INFO L225 Difference]: With dead ends: 5252 [2022-11-20 21:15:29,671 INFO L226 Difference]: Without dead ends: 3400 [2022-11-20 21:15:29,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:29,677 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 60 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:29,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 266 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:15:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-11-20 21:15:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3068. [2022-11-20 21:15:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 2373 states have (on average 1.381795195954488) internal successors, (3279), 2392 states have internal predecessors, (3279), 442 states have call successors, (442), 252 states have call predecessors, (442), 252 states have return successors, (442), 424 states have call predecessors, (442), 442 states have call successors, (442) [2022-11-20 21:15:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4163 transitions. [2022-11-20 21:15:29,962 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4163 transitions. Word has length 111 [2022-11-20 21:15:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:29,962 INFO L495 AbstractCegarLoop]: Abstraction has 3068 states and 4163 transitions. [2022-11-20 21:15:29,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-20 21:15:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4163 transitions. [2022-11-20 21:15:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 21:15:29,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:29,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:29,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:30,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 21:15:30,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1152981882, now seen corresponding path program 2 times [2022-11-20 21:15:30,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:30,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374830791] [2022-11-20 21:15:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:30,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 21:15:30,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374830791] [2022-11-20 21:15:30,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374830791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:30,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944874550] [2022-11-20 21:15:30,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:15:30,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:30,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:30,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:30,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:15:30,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:15:30,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:15:30,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 21:15:30,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 21:15:30,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:15:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-20 21:15:31,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944874550] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:31,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:15:31,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-11-20 21:15:31,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811629431] [2022-11-20 21:15:31,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:31,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:15:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:15:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:15:31,679 INFO L87 Difference]: Start difference. First operand 3068 states and 4163 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 21:15:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:32,380 INFO L93 Difference]: Finished difference Result 7527 states and 10177 transitions. [2022-11-20 21:15:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:15:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 111 [2022-11-20 21:15:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:32,403 INFO L225 Difference]: With dead ends: 7527 [2022-11-20 21:15:32,403 INFO L226 Difference]: Without dead ends: 4465 [2022-11-20 21:15:32,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:15:32,412 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 316 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:32,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 241 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:15:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2022-11-20 21:15:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 4463. [2022-11-20 21:15:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3432 states have (on average 1.354020979020979) internal successors, (4647), 3460 states have internal predecessors, (4647), 652 states have call successors, (652), 378 states have call predecessors, (652), 378 states have return successors, (652), 625 states have call predecessors, (652), 652 states have call successors, (652) [2022-11-20 21:15:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 5951 transitions. [2022-11-20 21:15:32,973 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 5951 transitions. Word has length 111 [2022-11-20 21:15:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:32,973 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 5951 transitions. [2022-11-20 21:15:32,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 21:15:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 5951 transitions. [2022-11-20 21:15:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:15:32,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:32,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:32,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 21:15:33,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 21:15:33,193 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1341230879, now seen corresponding path program 1 times [2022-11-20 21:15:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:33,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796980696] [2022-11-20 21:15:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 21:15:33,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:33,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796980696] [2022-11-20 21:15:33,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796980696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:33,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647522163] [2022-11-20 21:15:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:33,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:33,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:33,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:33,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:15:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:33,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:15:33,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 21:15:33,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:33,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647522163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:33,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:33,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 21:15:33,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931607344] [2022-11-20 21:15:33,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:33,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:33,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:33,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:33,514 INFO L87 Difference]: Start difference. First operand 4463 states and 5951 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-11-20 21:15:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:34,182 INFO L93 Difference]: Finished difference Result 8514 states and 11449 transitions. [2022-11-20 21:15:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:34,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 113 [2022-11-20 21:15:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:34,213 INFO L225 Difference]: With dead ends: 8514 [2022-11-20 21:15:34,213 INFO L226 Difference]: Without dead ends: 5542 [2022-11-20 21:15:34,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:34,224 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 65 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:34,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 271 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2022-11-20 21:15:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4982. [2022-11-20 21:15:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4982 states, 3879 states have (on average 1.3642691415313226) internal successors, (5292), 3907 states have internal predecessors, (5292), 688 states have call successors, (688), 414 states have call predecessors, (688), 414 states have return successors, (688), 661 states have call predecessors, (688), 688 states have call successors, (688) [2022-11-20 21:15:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 6668 transitions. [2022-11-20 21:15:34,771 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 6668 transitions. Word has length 113 [2022-11-20 21:15:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:34,772 INFO L495 AbstractCegarLoop]: Abstraction has 4982 states and 6668 transitions. [2022-11-20 21:15:34,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-11-20 21:15:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 6668 transitions. [2022-11-20 21:15:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:15:34,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:34,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:34,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:34,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 21:15:34,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:34,997 INFO L85 PathProgramCache]: Analyzing trace with hash 468430558, now seen corresponding path program 2 times [2022-11-20 21:15:34,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:34,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526772168] [2022-11-20 21:15:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:34,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 21:15:35,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:35,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526772168] [2022-11-20 21:15:35,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526772168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:35,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125261075] [2022-11-20 21:15:35,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:15:35,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:35,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:35,204 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:35,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:15:35,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:15:35,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:15:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 21:15:35,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 23 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 21:15:35,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:15:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 21:15:36,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125261075] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:36,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:15:36,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 14 [2022-11-20 21:15:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218131534] [2022-11-20 21:15:36,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:36,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:15:36,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:15:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:15:36,018 INFO L87 Difference]: Start difference. First operand 4982 states and 6668 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:15:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:36,768 INFO L93 Difference]: Finished difference Result 9913 states and 13398 transitions. [2022-11-20 21:15:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:15:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-20 21:15:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:36,822 INFO L225 Difference]: With dead ends: 9913 [2022-11-20 21:15:36,822 INFO L226 Difference]: Without dead ends: 6422 [2022-11-20 21:15:36,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:15:36,832 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 111 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:36,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 271 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6422 states. [2022-11-20 21:15:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6422 to 6230. [2022-11-20 21:15:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 5019 states have (on average 1.3460848774656307) internal successors, (6756), 5047 states have internal predecessors, (6756), 706 states have call successors, (706), 504 states have call predecessors, (706), 504 states have return successors, (754), 679 states have call predecessors, (754), 706 states have call successors, (754) [2022-11-20 21:15:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 8216 transitions. [2022-11-20 21:15:37,512 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 8216 transitions. Word has length 113 [2022-11-20 21:15:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:37,513 INFO L495 AbstractCegarLoop]: Abstraction has 6230 states and 8216 transitions. [2022-11-20 21:15:37,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:15:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 8216 transitions. [2022-11-20 21:15:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:15:37,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:37,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:37,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 21:15:37,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash -763677826, now seen corresponding path program 1 times [2022-11-20 21:15:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:37,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031645898] [2022-11-20 21:15:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 21:15:38,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031645898] [2022-11-20 21:15:38,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031645898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786740726] [2022-11-20 21:15:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:38,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:38,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:38,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:15:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:38,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:15:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:15:38,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:38,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786740726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:38,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:38,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 21:15:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269028833] [2022-11-20 21:15:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:38,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:38,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:38,210 INFO L87 Difference]: Start difference. First operand 6230 states and 8216 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-20 21:15:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:38,900 INFO L93 Difference]: Finished difference Result 10440 states and 14070 transitions. [2022-11-20 21:15:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 113 [2022-11-20 21:15:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:38,923 INFO L225 Difference]: With dead ends: 10440 [2022-11-20 21:15:38,924 INFO L226 Difference]: Without dead ends: 6250 [2022-11-20 21:15:38,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:38,934 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 88 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:38,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 262 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2022-11-20 21:15:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 6170. [2022-11-20 21:15:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 4959 states have (on average 1.3139745916515426) internal successors, (6516), 4987 states have internal predecessors, (6516), 706 states have call successors, (706), 504 states have call predecessors, (706), 504 states have return successors, (754), 679 states have call predecessors, (754), 706 states have call successors, (754) [2022-11-20 21:15:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 7976 transitions. [2022-11-20 21:15:39,542 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 7976 transitions. Word has length 113 [2022-11-20 21:15:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:39,543 INFO L495 AbstractCegarLoop]: Abstraction has 6170 states and 7976 transitions. [2022-11-20 21:15:39,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-20 21:15:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 7976 transitions. [2022-11-20 21:15:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:15:39,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:39,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:39,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:39,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 21:15:39,764 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1128683810, now seen corresponding path program 1 times [2022-11-20 21:15:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:39,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140540917] [2022-11-20 21:15:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 21:15:39,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:39,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140540917] [2022-11-20 21:15:39,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140540917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150606720] [2022-11-20 21:15:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:39,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:39,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:39,963 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:39,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:15:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:15:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:15:40,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:40,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150606720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:40,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:40,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 21:15:40,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123084887] [2022-11-20 21:15:40,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:40,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:40,145 INFO L87 Difference]: Start difference. First operand 6170 states and 7976 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:15:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:40,763 INFO L93 Difference]: Finished difference Result 11251 states and 14618 transitions. [2022-11-20 21:15:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:40,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-20 21:15:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:40,787 INFO L225 Difference]: With dead ends: 11251 [2022-11-20 21:15:40,788 INFO L226 Difference]: Without dead ends: 7151 [2022-11-20 21:15:40,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:40,799 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 99 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:40,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:15:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-11-20 21:15:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 7151. [2022-11-20 21:15:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7151 states, 5826 states have (on average 1.2868177136972194) internal successors, (7497), 5854 states have internal predecessors, (7497), 736 states have call successors, (736), 588 states have call predecessors, (736), 588 states have return successors, (784), 709 states have call predecessors, (784), 736 states have call successors, (784) [2022-11-20 21:15:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 9017 transitions. [2022-11-20 21:15:41,527 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 9017 transitions. Word has length 113 [2022-11-20 21:15:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:41,528 INFO L495 AbstractCegarLoop]: Abstraction has 7151 states and 9017 transitions. [2022-11-20 21:15:41,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:15:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 9017 transitions. [2022-11-20 21:15:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 21:15:41,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:41,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:41,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:41,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:41,755 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash -918604943, now seen corresponding path program 1 times [2022-11-20 21:15:41,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:41,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53823679] [2022-11-20 21:15:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 21:15:42,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53823679] [2022-11-20 21:15:42,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53823679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511803060] [2022-11-20 21:15:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:42,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:42,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:42,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:15:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:42,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:15:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:15:42,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:42,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511803060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:42,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:42,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 21:15:42,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362085053] [2022-11-20 21:15:42,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:42,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:42,229 INFO L87 Difference]: Start difference. First operand 7151 states and 9017 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2022-11-20 21:15:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:42,895 INFO L93 Difference]: Finished difference Result 12068 states and 15528 transitions. [2022-11-20 21:15:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:42,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 114 [2022-11-20 21:15:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:42,921 INFO L225 Difference]: With dead ends: 12068 [2022-11-20 21:15:42,921 INFO L226 Difference]: Without dead ends: 7099 [2022-11-20 21:15:42,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:42,934 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 87 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:42,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 274 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-11-20 21:15:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 7043. [2022-11-20 21:15:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7043 states, 5730 states have (on average 1.2581151832460733) internal successors, (7209), 5746 states have internal predecessors, (7209), 736 states have call successors, (736), 588 states have call predecessors, (736), 576 states have return successors, (772), 709 states have call predecessors, (772), 736 states have call successors, (772) [2022-11-20 21:15:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 8717 transitions. [2022-11-20 21:15:43,501 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 8717 transitions. Word has length 114 [2022-11-20 21:15:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:43,501 INFO L495 AbstractCegarLoop]: Abstraction has 7043 states and 8717 transitions. [2022-11-20 21:15:43,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2022-11-20 21:15:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 8717 transitions. [2022-11-20 21:15:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 21:15:43,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:43,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:43,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:43,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 21:15:43,720 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:43,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1796748787, now seen corresponding path program 1 times [2022-11-20 21:15:43,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:43,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223382102] [2022-11-20 21:15:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:43,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 21:15:43,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223382102] [2022-11-20 21:15:43,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223382102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893758249] [2022-11-20 21:15:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:43,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:43,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:43,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:43,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:15:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:44,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:15:44,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:15:44,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:44,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893758249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:44,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:44,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-20 21:15:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336041746] [2022-11-20 21:15:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:44,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:15:44,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:15:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:15:44,138 INFO L87 Difference]: Start difference. First operand 7043 states and 8717 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 21:15:44,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:44,881 INFO L93 Difference]: Finished difference Result 10154 states and 12597 transitions. [2022-11-20 21:15:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:15:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-20 21:15:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:44,905 INFO L225 Difference]: With dead ends: 10154 [2022-11-20 21:15:44,905 INFO L226 Difference]: Without dead ends: 7527 [2022-11-20 21:15:44,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:15:44,915 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 104 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:44,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 424 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2022-11-20 21:15:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 7303. [2022-11-20 21:15:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7303 states, 5940 states have (on average 1.2533670033670035) internal successors, (7445), 5974 states have internal predecessors, (7445), 744 states have call successors, (744), 594 states have call predecessors, (744), 618 states have return successors, (816), 735 states have call predecessors, (816), 744 states have call successors, (816) [2022-11-20 21:15:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 9005 transitions. [2022-11-20 21:15:45,533 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 9005 transitions. Word has length 116 [2022-11-20 21:15:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:45,534 INFO L495 AbstractCegarLoop]: Abstraction has 7303 states and 9005 transitions. [2022-11-20 21:15:45,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 21:15:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 9005 transitions. [2022-11-20 21:15:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 21:15:45,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:45,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:45,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:45,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 21:15:45,753 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash 263649726, now seen corresponding path program 1 times [2022-11-20 21:15:45,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:45,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752934704] [2022-11-20 21:15:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 21:15:45,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:45,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752934704] [2022-11-20 21:15:45,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752934704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:45,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141222743] [2022-11-20 21:15:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:45,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:45,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:45,951 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:45,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:15:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:46,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:15:46,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 21:15:46,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:46,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141222743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:46,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:46,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 21:15:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107830077] [2022-11-20 21:15:46,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:46,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:46,152 INFO L87 Difference]: Start difference. First operand 7303 states and 9005 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:15:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:46,726 INFO L93 Difference]: Finished difference Result 9996 states and 12452 transitions. [2022-11-20 21:15:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-20 21:15:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:46,748 INFO L225 Difference]: With dead ends: 9996 [2022-11-20 21:15:46,749 INFO L226 Difference]: Without dead ends: 7045 [2022-11-20 21:15:46,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:46,758 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 21 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:46,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 213 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:15:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2022-11-20 21:15:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 6625. [2022-11-20 21:15:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5370 states have (on average 1.2562383612662942) internal successors, (6746), 5377 states have internal predecessors, (6746), 708 states have call successors, (708), 558 states have call predecessors, (708), 546 states have return successors, (744), 690 states have call predecessors, (744), 708 states have call successors, (744) [2022-11-20 21:15:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 8198 transitions. [2022-11-20 21:15:47,368 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 8198 transitions. Word has length 117 [2022-11-20 21:15:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:47,369 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 8198 transitions. [2022-11-20 21:15:47,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:15:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 8198 transitions. [2022-11-20 21:15:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 21:15:47,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:47,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:47,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:47,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 21:15:47,596 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash -584897462, now seen corresponding path program 1 times [2022-11-20 21:15:47,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:47,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057583690] [2022-11-20 21:15:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:47,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 21:15:47,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:47,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057583690] [2022-11-20 21:15:47,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057583690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:47,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286363066] [2022-11-20 21:15:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:47,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:47,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:47,828 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:47,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:15:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:15:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 21:15:48,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:48,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286363066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:48,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:48,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 21:15:48,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293547514] [2022-11-20 21:15:48,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:48,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:48,019 INFO L87 Difference]: Start difference. First operand 6625 states and 8198 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:15:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:49,009 INFO L93 Difference]: Finished difference Result 15683 states and 19643 transitions. [2022-11-20 21:15:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-20 21:15:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:49,040 INFO L225 Difference]: With dead ends: 15683 [2022-11-20 21:15:49,041 INFO L226 Difference]: Without dead ends: 9120 [2022-11-20 21:15:49,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:49,056 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:49,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 219 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:15:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2022-11-20 21:15:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 7317. [2022-11-20 21:15:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7317 states, 5964 states have (on average 1.266934942991281) internal successors, (7556), 5972 states have internal predecessors, (7556), 757 states have call successors, (757), 607 states have call predecessors, (757), 595 states have return successors, (793), 738 states have call predecessors, (793), 757 states have call successors, (793) [2022-11-20 21:15:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 9106 transitions. [2022-11-20 21:15:49,849 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 9106 transitions. Word has length 117 [2022-11-20 21:15:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:49,850 INFO L495 AbstractCegarLoop]: Abstraction has 7317 states and 9106 transitions. [2022-11-20 21:15:49,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:15:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 9106 transitions. [2022-11-20 21:15:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-20 21:15:49,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:49,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:49,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:50,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 21:15:50,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash 413587060, now seen corresponding path program 1 times [2022-11-20 21:15:50,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:50,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942846842] [2022-11-20 21:15:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:50,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 21:15:50,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:50,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942846842] [2022-11-20 21:15:50,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942846842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633282881] [2022-11-20 21:15:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:50,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:50,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:50,252 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:50,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:15:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:50,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:15:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:50,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:50,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633282881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:50,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:50,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-20 21:15:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901534590] [2022-11-20 21:15:50,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:50,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:15:50,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:15:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:50,485 INFO L87 Difference]: Start difference. First operand 7317 states and 9106 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-20 21:15:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:51,391 INFO L93 Difference]: Finished difference Result 14378 states and 17965 transitions. [2022-11-20 21:15:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:15:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 118 [2022-11-20 21:15:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:51,421 INFO L225 Difference]: With dead ends: 14378 [2022-11-20 21:15:51,422 INFO L226 Difference]: Without dead ends: 9372 [2022-11-20 21:15:51,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:15:51,434 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 191 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:51,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 366 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:15:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-11-20 21:15:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 8837. [2022-11-20 21:15:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 7184 states have (on average 1.257238307349666) internal successors, (9032), 7180 states have internal predecessors, (9032), 937 states have call successors, (937), 745 states have call predecessors, (937), 715 states have return successors, (991), 912 states have call predecessors, (991), 937 states have call successors, (991) [2022-11-20 21:15:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 10960 transitions. [2022-11-20 21:15:52,433 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 10960 transitions. Word has length 118 [2022-11-20 21:15:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:52,433 INFO L495 AbstractCegarLoop]: Abstraction has 8837 states and 10960 transitions. [2022-11-20 21:15:52,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-20 21:15:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 10960 transitions. [2022-11-20 21:15:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:15:52,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:52,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:52,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:52,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 21:15:52,655 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash -399675774, now seen corresponding path program 1 times [2022-11-20 21:15:52,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:52,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772481773] [2022-11-20 21:15:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:52,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-20 21:15:52,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:52,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772481773] [2022-11-20 21:15:52,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772481773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:52,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759873260] [2022-11-20 21:15:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:52,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:52,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:52,738 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:52,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:15:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:15:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 21:15:52,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:52,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759873260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:52,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:15:52,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 21:15:52,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656591446] [2022-11-20 21:15:52,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:52,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:15:52,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:15:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:52,901 INFO L87 Difference]: Start difference. First operand 8837 states and 10960 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-11-20 21:15:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:53,693 INFO L93 Difference]: Finished difference Result 16289 states and 20390 transitions. [2022-11-20 21:15:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:15:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 113 [2022-11-20 21:15:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:53,727 INFO L225 Difference]: With dead ends: 16289 [2022-11-20 21:15:53,727 INFO L226 Difference]: Without dead ends: 10643 [2022-11-20 21:15:53,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:53,737 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 51 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:53,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 262 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:15:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10643 states. [2022-11-20 21:15:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10643 to 9689. [2022-11-20 21:15:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9689 states, 7908 states have (on average 1.2701062215477996) internal successors, (10044), 7904 states have internal predecessors, (10044), 1001 states have call successors, (1001), 809 states have call predecessors, (1001), 779 states have return successors, (1055), 976 states have call predecessors, (1055), 1001 states have call successors, (1055) [2022-11-20 21:15:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9689 states to 9689 states and 12100 transitions. [2022-11-20 21:15:54,860 INFO L78 Accepts]: Start accepts. Automaton has 9689 states and 12100 transitions. Word has length 113 [2022-11-20 21:15:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:54,860 INFO L495 AbstractCegarLoop]: Abstraction has 9689 states and 12100 transitions. [2022-11-20 21:15:54,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-11-20 21:15:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 9689 states and 12100 transitions. [2022-11-20 21:15:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:15:54,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:54,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:54,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:55,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:55,081 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1461185143, now seen corresponding path program 1 times [2022-11-20 21:15:55,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:55,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838317549] [2022-11-20 21:15:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:55,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 21:15:55,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838317549] [2022-11-20 21:15:55,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838317549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:55,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:55,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 21:15:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860852409] [2022-11-20 21:15:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:15:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:15:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:15:55,656 INFO L87 Difference]: Start difference. First operand 9689 states and 12100 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-20 21:15:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:58,279 INFO L93 Difference]: Finished difference Result 21685 states and 27606 transitions. [2022-11-20 21:15:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:15:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 113 [2022-11-20 21:15:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:58,326 INFO L225 Difference]: With dead ends: 21685 [2022-11-20 21:15:58,326 INFO L226 Difference]: Without dead ends: 16784 [2022-11-20 21:15:58,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:15:58,336 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 560 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:58,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 423 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:15:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16784 states. [2022-11-20 21:15:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16784 to 13786. [2022-11-20 21:15:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13786 states, 11345 states have (on average 1.25165271044513) internal successors, (14200), 11374 states have internal predecessors, (14200), 1331 states have call successors, (1331), 1106 states have call predecessors, (1331), 1109 states have return successors, (1439), 1306 states have call predecessors, (1439), 1331 states have call successors, (1439) [2022-11-20 21:15:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13786 states to 13786 states and 16970 transitions. [2022-11-20 21:15:59,529 INFO L78 Accepts]: Start accepts. Automaton has 13786 states and 16970 transitions. Word has length 113 [2022-11-20 21:15:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:59,530 INFO L495 AbstractCegarLoop]: Abstraction has 13786 states and 16970 transitions. [2022-11-20 21:15:59,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-20 21:15:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 13786 states and 16970 transitions. [2022-11-20 21:15:59,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:15:59,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:59,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 21:15:59,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 21:15:59,543 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:15:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:59,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1062311178, now seen corresponding path program 1 times [2022-11-20 21:15:59,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:59,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757829505] [2022-11-20 21:15:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:59,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:15:59,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:59,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757829505] [2022-11-20 21:15:59,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757829505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:59,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:59,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:15:59,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915578751] [2022-11-20 21:15:59,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:59,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:15:59,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:59,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:15:59,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:15:59,606 INFO L87 Difference]: Start difference. First operand 13786 states and 16970 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:16:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:16:00,911 INFO L93 Difference]: Finished difference Result 19194 states and 23912 transitions. [2022-11-20 21:16:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:16:00,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-20 21:16:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:16:00,954 INFO L225 Difference]: With dead ends: 19194 [2022-11-20 21:16:00,955 INFO L226 Difference]: Without dead ends: 13654 [2022-11-20 21:16:00,968 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 [2022-11-20 21:16:00,969 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 201 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:16:00,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 298 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:16:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13654 states. [2022-11-20 21:16:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13654 to 13630. [2022-11-20 21:16:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13630 states, 11198 states have (on average 1.2407572780853724) internal successors, (13894), 11218 states have internal predecessors, (13894), 1331 states have call successors, (1331), 1106 states have call predecessors, (1331), 1100 states have return successors, (1430), 1306 states have call predecessors, (1430), 1331 states have call successors, (1430) [2022-11-20 21:16:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13630 states to 13630 states and 16655 transitions. [2022-11-20 21:16:02,185 INFO L78 Accepts]: Start accepts. Automaton has 13630 states and 16655 transitions. Word has length 113 [2022-11-20 21:16:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:16:02,186 INFO L495 AbstractCegarLoop]: Abstraction has 13630 states and 16655 transitions. [2022-11-20 21:16:02,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:16:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 13630 states and 16655 transitions. [2022-11-20 21:16:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 21:16:02,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:16:02,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:16:02,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 21:16:02,194 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:16:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:16:02,195 INFO L85 PathProgramCache]: Analyzing trace with hash 163584257, now seen corresponding path program 1 times [2022-11-20 21:16:02,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:16:02,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549129856] [2022-11-20 21:16:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:02,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:16:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 21:16:02,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:16:02,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549129856] [2022-11-20 21:16:02,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549129856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:16:02,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:16:02,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:16:02,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058139275] [2022-11-20 21:16:02,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:16:02,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:16:02,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:16:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:16:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:16:02,378 INFO L87 Difference]: Start difference. First operand 13630 states and 16655 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:16:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:16:04,325 INFO L93 Difference]: Finished difference Result 22966 states and 28070 transitions. [2022-11-20 21:16:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:16:04,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2022-11-20 21:16:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:16:04,378 INFO L225 Difference]: With dead ends: 22966 [2022-11-20 21:16:04,379 INFO L226 Difference]: Without dead ends: 17582 [2022-11-20 21:16:04,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:16:04,394 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 103 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:16:04,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 333 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:16:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2022-11-20 21:16:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 17049. [2022-11-20 21:16:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17049 states, 13907 states have (on average 1.2295966060257424) internal successors, (17100), 13969 states have internal predecessors, (17100), 1725 states have call successors, (1725), 1416 states have call predecessors, (1725), 1416 states have return successors, (1932), 1664 states have call predecessors, (1932), 1725 states have call successors, (1932) [2022-11-20 21:16:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17049 states to 17049 states and 20757 transitions. [2022-11-20 21:16:06,378 INFO L78 Accepts]: Start accepts. Automaton has 17049 states and 20757 transitions. Word has length 114 [2022-11-20 21:16:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:16:06,379 INFO L495 AbstractCegarLoop]: Abstraction has 17049 states and 20757 transitions. [2022-11-20 21:16:06,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 21:16:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 17049 states and 20757 transitions. [2022-11-20 21:16:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-20 21:16:06,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:16:06,388 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:16:06,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 21:16:06,389 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:16:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:16:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash 134362487, now seen corresponding path program 1 times [2022-11-20 21:16:06,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:16:06,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219031650] [2022-11-20 21:16:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:16:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 21:16:06,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:16:06,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219031650] [2022-11-20 21:16:06,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219031650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:06,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860415400] [2022-11-20 21:16:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:06,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:06,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:16:06,958 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:16:06,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 21:16:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:16:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:16:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:16:07,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:16:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 21:16:07,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860415400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:16:07,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [272452510] [2022-11-20 21:16:07,699 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-11-20 21:16:07,700 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:16:07,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:16:07,709 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:16:07,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:16:14,913 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-20 21:16:20,628 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-20 21:16:28,904 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-20 21:16:28,927 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 92 for LOIs [2022-11-20 21:16:28,950 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 48 for LOIs [2022-11-20 21:16:29,303 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-20 21:16:29,850 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:16:44,876 WARN L233 SmtUtils]: Spent 13.89s on a formula simplification. DAG size of input: 520 DAG size of output: 474 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:16:58,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '481967#(and (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:16:58,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:16:58,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:16:58,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 19 [2022-11-20 21:16:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463413310] [2022-11-20 21:16:58,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:16:58,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:16:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:16:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:16:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=4023, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 21:16:58,021 INFO L87 Difference]: Start difference. First operand 17049 states and 20757 transitions. Second operand has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-20 21:17:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:02,981 INFO L93 Difference]: Finished difference Result 33161 states and 41100 transitions. [2022-11-20 21:17:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-20 21:17:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 119 [2022-11-20 21:17:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:03,020 INFO L225 Difference]: With dead ends: 33161 [2022-11-20 21:17:03,020 INFO L226 Difference]: Without dead ends: 16074 [2022-11-20 21:17:03,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8725 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=1653, Invalid=19227, Unknown=0, NotChecked=0, Total=20880 [2022-11-20 21:17:03,051 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1505 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:03,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 2252 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 21:17:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16074 states. [2022-11-20 21:17:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16074 to 10676. [2022-11-20 21:17:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10676 states, 8750 states have (on average 1.2326857142857144) internal successors, (10786), 8781 states have internal predecessors, (10786), 1024 states have call successors, (1024), 901 states have call predecessors, (1024), 901 states have return successors, (1093), 993 states have call predecessors, (1093), 1024 states have call successors, (1093) [2022-11-20 21:17:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10676 states to 10676 states and 12903 transitions. [2022-11-20 21:17:04,364 INFO L78 Accepts]: Start accepts. Automaton has 10676 states and 12903 transitions. Word has length 119 [2022-11-20 21:17:04,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:04,365 INFO L495 AbstractCegarLoop]: Abstraction has 10676 states and 12903 transitions. [2022-11-20 21:17:04,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-20 21:17:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 10676 states and 12903 transitions. [2022-11-20 21:17:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-20 21:17:04,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:04,374 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:04,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:04,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:04,587 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash 795512980, now seen corresponding path program 1 times [2022-11-20 21:17:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:04,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027216783] [2022-11-20 21:17:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:04,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 21:17:05,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:05,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027216783] [2022-11-20 21:17:05,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027216783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:05,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536727022] [2022-11-20 21:17:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:05,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:05,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:05,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:05,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 21:17:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:05,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:17:05,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:17:05,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 21:17:05,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536727022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:05,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995625483] [2022-11-20 21:17:05,845 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-20 21:17:05,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:05,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:05,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:05,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:09,700 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-20 21:17:20,816 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-20 21:17:26,273 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-20 21:17:26,298 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-20 21:17:26,312 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 48 for LOIs [2022-11-20 21:17:26,382 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-20 21:17:26,917 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:35,729 WARN L233 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 354 DAG size of output: 308 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:17:47,648 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 446 DAG size of output: 301 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:17:55,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '543111#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:55,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:55,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:55,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 21 [2022-11-20 21:17:55,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989927296] [2022-11-20 21:17:55,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:55,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 21:17:55,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:55,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 21:17:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=4471, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 21:17:55,391 INFO L87 Difference]: Start difference. First operand 10676 states and 12903 transitions. Second operand has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-20 21:18:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:00,222 INFO L93 Difference]: Finished difference Result 22759 states and 27884 transitions. [2022-11-20 21:18:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-20 21:18:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 122 [2022-11-20 21:18:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:00,246 INFO L225 Difference]: With dead ends: 22759 [2022-11-20 21:18:00,246 INFO L226 Difference]: Without dead ends: 12938 [2022-11-20 21:18:00,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8438 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=1550, Invalid=19042, Unknown=0, NotChecked=0, Total=20592 [2022-11-20 21:18:00,261 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 828 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 3121 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:00,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 3121 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 21:18:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12938 states. [2022-11-20 21:18:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12938 to 7490. [2022-11-20 21:18:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 6222 states have (on average 1.2457409193185471) internal successors, (7751), 6233 states have internal predecessors, (7751), 656 states have call successors, (656), 615 states have call predecessors, (656), 611 states have return successors, (679), 641 states have call predecessors, (679), 656 states have call successors, (679) [2022-11-20 21:18:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 9086 transitions. [2022-11-20 21:18:01,035 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 9086 transitions. Word has length 122 [2022-11-20 21:18:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:01,035 INFO L495 AbstractCegarLoop]: Abstraction has 7490 states and 9086 transitions. [2022-11-20 21:18:01,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-20 21:18:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 9086 transitions. [2022-11-20 21:18:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 21:18:01,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:01,039 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:01,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:01,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 21:18:01,241 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash 356584013, now seen corresponding path program 1 times [2022-11-20 21:18:01,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:01,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603071343] [2022-11-20 21:18:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:01,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-20 21:18:01,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:01,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603071343] [2022-11-20 21:18:01,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603071343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:01,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123198095] [2022-11-20 21:18:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:01,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:01,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:01,469 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:01,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 21:18:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:01,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:18:01,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:18:01,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:18:02,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123198095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60701737] [2022-11-20 21:18:02,175 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-11-20 21:18:02,175 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:02,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:02,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:02,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:06,079 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-20 21:19:11,871 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-20 21:19:17,184 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-20 21:19:17,224 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-20 21:19:17,235 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 50 for LOIs [2022-11-20 21:19:17,325 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-20 21:19:17,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:23,956 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 280 DAG size of output: 234 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:20:03,880 WARN L233 SmtUtils]: Spent 34.64s on a formula simplification. DAG size of input: 1582 DAG size of output: 1055 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:20:13,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585300#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-20 21:20:13,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:20:13,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:20:13,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 17 [2022-11-20 21:20:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339879695] [2022-11-20 21:20:13,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:13,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:20:13,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:20:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=4734, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 21:20:13,504 INFO L87 Difference]: Start difference. First operand 7490 states and 9086 transitions. Second operand has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-20 21:20:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:20,576 INFO L93 Difference]: Finished difference Result 19862 states and 24570 transitions. [2022-11-20 21:20:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-11-20 21:20:20,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 124 [2022-11-20 21:20:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:20,600 INFO L225 Difference]: With dead ends: 19862 [2022-11-20 21:20:20,600 INFO L226 Difference]: Without dead ends: 12936 [2022-11-20 21:20:20,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 379 SyntacticMatches, 5 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22415 ImplicationChecksByTransitivity, 59.7s TimeCoverageRelationStatistics Valid=3774, Invalid=47076, Unknown=0, NotChecked=0, Total=50850 [2022-11-20 21:20:20,623 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1079 mSDsluCounter, 3011 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:20,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 3385 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 21:20:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12936 states. [2022-11-20 21:20:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12936 to 9244. [2022-11-20 21:20:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9244 states, 7664 states have (on average 1.2175104384133613) internal successors, (9331), 7683 states have internal predecessors, (9331), 808 states have call successors, (808), 764 states have call predecessors, (808), 771 states have return successors, (989), 796 states have call predecessors, (989), 808 states have call successors, (989) [2022-11-20 21:20:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9244 states to 9244 states and 11128 transitions. [2022-11-20 21:20:21,646 INFO L78 Accepts]: Start accepts. Automaton has 9244 states and 11128 transitions. Word has length 124 [2022-11-20 21:20:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:21,647 INFO L495 AbstractCegarLoop]: Abstraction has 9244 states and 11128 transitions. [2022-11-20 21:20:21,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-20 21:20:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 9244 states and 11128 transitions. [2022-11-20 21:20:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-20 21:20:21,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:21,654 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:21,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:21,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 21:20:21,860 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:21,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1199577155, now seen corresponding path program 1 times [2022-11-20 21:20:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:21,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844463384] [2022-11-20 21:20:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:20:22,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:22,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844463384] [2022-11-20 21:20:22,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844463384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:22,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822619483] [2022-11-20 21:20:22,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:22,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:22,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:22,512 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:22,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 21:20:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 21:20:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:20:23,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-20 21:20:23,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822619483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2056573506] [2022-11-20 21:20:23,866 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2022-11-20 21:20:23,866 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:20:23,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:20:23,867 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:20:23,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:20:29,640 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 60 for LOIs [2022-11-20 21:20:29,656 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 85 for LOIs [2022-11-20 21:20:29,676 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 85 for LOIs [2022-11-20 21:20:29,684 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 39 for LOIs [2022-11-20 21:20:29,690 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 51 for LOIs [2022-11-20 21:20:29,759 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-20 21:20:29,999 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:20:47,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '625857#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (= ~t2_i~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-20 21:20:47,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:20:47,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:20:47,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2022-11-20 21:20:47,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847440856] [2022-11-20 21:20:47,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:47,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 21:20:47,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 21:20:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=8273, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 21:20:47,599 INFO L87 Difference]: Start difference. First operand 9244 states and 11128 transitions. Second operand has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-20 21:20:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:55,976 INFO L93 Difference]: Finished difference Result 20583 states and 24905 transitions. [2022-11-20 21:20:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 21:20:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 126 [2022-11-20 21:20:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:56,009 INFO L225 Difference]: With dead ends: 20583 [2022-11-20 21:20:56,009 INFO L226 Difference]: Without dead ends: 13726 [2022-11-20 21:20:56,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 305 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10934 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=2575, Invalid=23185, Unknown=0, NotChecked=0, Total=25760 [2022-11-20 21:20:56,024 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 4759 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 3325 mSolverCounterSat, 1896 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4759 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 5221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1896 IncrementalHoareTripleChecker+Valid, 3325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:56,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4759 Valid, 993 Invalid, 5221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1896 Valid, 3325 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 21:20:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13726 states. [2022-11-20 21:20:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13726 to 9044. [2022-11-20 21:20:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9044 states, 7465 states have (on average 1.2179504353650368) internal successors, (9092), 7489 states have internal predecessors, (9092), 811 states have call successors, (811), 755 states have call predecessors, (811), 767 states have return successors, (943), 799 states have call predecessors, (943), 811 states have call successors, (943) [2022-11-20 21:20:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 10846 transitions. [2022-11-20 21:20:57,194 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 10846 transitions. Word has length 126 [2022-11-20 21:20:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:57,195 INFO L495 AbstractCegarLoop]: Abstraction has 9044 states and 10846 transitions. [2022-11-20 21:20:57,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-20 21:20:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 10846 transitions. [2022-11-20 21:20:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-20 21:20:57,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:57,199 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:57,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:57,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:57,399 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:57,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1181254839, now seen corresponding path program 1 times [2022-11-20 21:20:57,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:57,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980431252] [2022-11-20 21:20:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 21:20:57,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980431252] [2022-11-20 21:20:57,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980431252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:57,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054403924] [2022-11-20 21:20:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:57,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:57,538 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:57,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 21:20:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:20:57,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 21:20:57,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:20:57,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054403924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:57,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:20:57,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-20 21:20:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384185976] [2022-11-20 21:20:57,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:57,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:57,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:20:57,769 INFO L87 Difference]: Start difference. First operand 9044 states and 10846 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-11-20 21:20:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:58,895 INFO L93 Difference]: Finished difference Result 17869 states and 21508 transitions. [2022-11-20 21:20:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 140 [2022-11-20 21:20:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:58,912 INFO L225 Difference]: With dead ends: 17869 [2022-11-20 21:20:58,912 INFO L226 Difference]: Without dead ends: 9521 [2022-11-20 21:20:58,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:20:58,922 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 78 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:58,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:20:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9521 states. [2022-11-20 21:21:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9521 to 9308. [2022-11-20 21:21:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9308 states, 7713 states have (on average 1.2044600025930248) internal successors, (9290), 7737 states have internal predecessors, (9290), 811 states have call successors, (811), 771 states have call predecessors, (811), 783 states have return successors, (955), 799 states have call predecessors, (955), 811 states have call successors, (955) [2022-11-20 21:21:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 11056 transitions. [2022-11-20 21:21:00,104 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 11056 transitions. Word has length 140 [2022-11-20 21:21:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:00,104 INFO L495 AbstractCegarLoop]: Abstraction has 9308 states and 11056 transitions. [2022-11-20 21:21:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-11-20 21:21:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 11056 transitions. [2022-11-20 21:21:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-20 21:21:00,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:00,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:00,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:00,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:00,316 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash -601103667, now seen corresponding path program 1 times [2022-11-20 21:21:00,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:00,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894298841] [2022-11-20 21:21:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 21:21:00,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:00,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894298841] [2022-11-20 21:21:00,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894298841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:00,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648578606] [2022-11-20 21:21:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:00,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:00,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:00,386 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 21:21:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:00,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:21:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 21:21:00,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:00,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648578606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:00,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:21:00,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 21:21:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427228452] [2022-11-20 21:21:00,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:00,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:00,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:21:00,601 INFO L87 Difference]: Start difference. First operand 9308 states and 11056 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 21:21:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:01,340 INFO L93 Difference]: Finished difference Result 14042 states and 16863 transitions. [2022-11-20 21:21:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2022-11-20 21:21:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:01,349 INFO L225 Difference]: With dead ends: 14042 [2022-11-20 21:21:01,349 INFO L226 Difference]: Without dead ends: 5449 [2022-11-20 21:21:01,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:21:01,358 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 64 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:01,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:21:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2022-11-20 21:21:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 5316. [2022-11-20 21:21:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 4397 states have (on average 1.1660222879235842) internal successors, (5127), 4408 states have internal predecessors, (5127), 469 states have call successors, (469), 449 states have call predecessors, (469), 449 states have return successors, (481), 458 states have call predecessors, (481), 469 states have call successors, (481) [2022-11-20 21:21:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 6077 transitions. [2022-11-20 21:21:02,050 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 6077 transitions. Word has length 141 [2022-11-20 21:21:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:02,050 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 6077 transitions. [2022-11-20 21:21:02,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 21:21:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 6077 transitions. [2022-11-20 21:21:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 21:21:02,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:02,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:02,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:02,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 21:21:02,259 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1817421069, now seen corresponding path program 2 times [2022-11-20 21:21:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90418001] [2022-11-20 21:21:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:02,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-20 21:21:02,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90418001] [2022-11-20 21:21:02,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90418001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722532297] [2022-11-20 21:21:02,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:21:02,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:02,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:02,476 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:02,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 21:21:02,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 21:21:02,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:21:02,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:21:02,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 21:21:02,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:02,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722532297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:02,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:21:02,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-20 21:21:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101582105] [2022-11-20 21:21:02,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:02,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:21:02,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:21:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:02,734 INFO L87 Difference]: Start difference. First operand 5316 states and 6077 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 21:21:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:03,804 INFO L93 Difference]: Finished difference Result 11076 states and 12731 transitions. [2022-11-20 21:21:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:21:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 143 [2022-11-20 21:21:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:03,816 INFO L225 Difference]: With dead ends: 11076 [2022-11-20 21:21:03,816 INFO L226 Difference]: Without dead ends: 6585 [2022-11-20 21:21:03,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:21:03,823 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 213 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:03,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 334 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:21:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6585 states. [2022-11-20 21:21:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6585 to 6045. [2022-11-20 21:21:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6045 states, 4946 states have (on average 1.1522442377678932) internal successors, (5699), 4965 states have internal predecessors, (5699), 563 states have call successors, (563), 523 states have call predecessors, (563), 535 states have return successors, (625), 556 states have call predecessors, (625), 563 states have call successors, (625) [2022-11-20 21:21:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6045 states to 6045 states and 6887 transitions. [2022-11-20 21:21:04,616 INFO L78 Accepts]: Start accepts. Automaton has 6045 states and 6887 transitions. Word has length 143 [2022-11-20 21:21:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:04,617 INFO L495 AbstractCegarLoop]: Abstraction has 6045 states and 6887 transitions. [2022-11-20 21:21:04,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 21:21:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6045 states and 6887 transitions. [2022-11-20 21:21:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 21:21:04,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:04,622 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:04,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:04,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 21:21:04,827 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:04,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1857649564, now seen corresponding path program 1 times [2022-11-20 21:21:04,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:04,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186403386] [2022-11-20 21:21:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:04,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-20 21:21:05,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:05,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186403386] [2022-11-20 21:21:05,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186403386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:05,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:05,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 21:21:05,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898911769] [2022-11-20 21:21:05,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:05,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:21:05,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:05,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:21:05,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:05,067 INFO L87 Difference]: Start difference. First operand 6045 states and 6887 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-20 21:21:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:08,052 INFO L93 Difference]: Finished difference Result 19295 states and 22108 transitions. [2022-11-20 21:21:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:21:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 172 [2022-11-20 21:21:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:08,084 INFO L225 Difference]: With dead ends: 19295 [2022-11-20 21:21:08,085 INFO L226 Difference]: Without dead ends: 16728 [2022-11-20 21:21:08,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:21:08,094 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 368 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:08,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1121 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:21:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16728 states. [2022-11-20 21:21:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16728 to 10471. [2022-11-20 21:21:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10471 states, 8510 states have (on average 1.1486486486486487) internal successors, (9775), 8540 states have internal predecessors, (9775), 1018 states have call successors, (1018), 923 states have call predecessors, (1018), 942 states have return successors, (1136), 1007 states have call predecessors, (1136), 1018 states have call successors, (1136) [2022-11-20 21:21:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10471 states to 10471 states and 11929 transitions. [2022-11-20 21:21:09,653 INFO L78 Accepts]: Start accepts. Automaton has 10471 states and 11929 transitions. Word has length 172 [2022-11-20 21:21:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:09,653 INFO L495 AbstractCegarLoop]: Abstraction has 10471 states and 11929 transitions. [2022-11-20 21:21:09,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-20 21:21:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10471 states and 11929 transitions. [2022-11-20 21:21:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-20 21:21:09,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:09,659 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:09,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 21:21:09,659 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1774534810, now seen corresponding path program 1 times [2022-11-20 21:21:09,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:09,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492877450] [2022-11-20 21:21:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 43 proven. 52 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-20 21:21:10,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:10,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492877450] [2022-11-20 21:21:10,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492877450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:10,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070515530] [2022-11-20 21:21:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:10,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:10,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:10,490 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:10,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_274bcf19-9070-4dca-a02c-5e0a54d343b6/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 21:21:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:21:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-20 21:21:10,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-20 21:21:11,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070515530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:11,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874748440] [2022-11-20 21:21:11,399 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2022-11-20 21:21:11,399 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:21:11,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:21:11,400 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:21:11,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs