./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur --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 01a21536345230b7194ff5017879c469eb8be909ba72352bb81feb2f101a934f --- 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-38b53e6 [2022-11-26 00:16:10,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:16:10,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:16:10,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:16:11,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:16:11,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:16:11,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:16:11,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:16:11,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:16:11,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:16:11,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:16:11,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:16:11,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:16:11,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:16:11,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:16:11,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:16:11,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:16:11,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:16:11,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:16:11,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:16:11,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:16:11,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:16:11,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:16:11,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:16:11,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:16:11,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:16:11,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:16:11,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:16:11,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:16:11,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:16:11,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:16:11,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:16:11,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:16:11,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:16:11,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:16:11,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:16:11,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:16:11,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:16:11,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:16:11,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:16:11,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:16:11,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:16:11,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:16:11,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:16:11,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:16:11,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:16:11,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:16:11,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:16:11,105 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:16:11,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:16:11,106 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:16:11,106 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:16:11,106 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:16:11,106 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:16:11,106 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:16:11,106 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:16:11,107 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:16:11,107 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:16:11,107 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:16:11,107 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:16:11,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:16:11,108 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:16:11,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:16:11,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:16:11,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:16:11,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:16:11,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:16:11,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:16:11,109 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:16:11,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:16:11,110 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:16:11,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:16:11,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:16:11,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:16:11,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:16:11,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:16:11,111 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:16:11,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:16:11,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:16:11,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:16:11,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:16:11,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:16:11,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:16:11,112 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_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01a21536345230b7194ff5017879c469eb8be909ba72352bb81feb2f101a934f [2022-11-26 00:16:11,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:16:11,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:16:11,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:16:11,364 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:16:11,365 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:16:11,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2022-11-26 00:16:14,542 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:16:14,839 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:16:14,840 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2022-11-26 00:16:14,850 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/data/e0af9f97b/da71be4bc2c545888667be5da8c222c4/FLAG1e8c48f7b [2022-11-26 00:16:14,865 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/data/e0af9f97b/da71be4bc2c545888667be5da8c222c4 [2022-11-26 00:16:14,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:16:14,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:16:14,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:16:14,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:16:14,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:16:14,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:16:14" (1/1) ... [2022-11-26 00:16:14,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32038d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:14, skipping insertion in model container [2022-11-26 00:16:14,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:16:14" (1/1) ... [2022-11-26 00:16:14,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:16:14,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:16:15,157 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_66d94426-4054-426a-9ec1-32d2c4a9e937/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c[14684,14697] [2022-11-26 00:16:15,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:16:15,180 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:16:15,247 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_66d94426-4054-426a-9ec1-32d2c4a9e937/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c[14684,14697] [2022-11-26 00:16:15,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:16:15,265 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:16:15,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15 WrapperNode [2022-11-26 00:16:15,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:16:15,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:16:15,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:16:15,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:16:15,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,338 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 479 [2022-11-26 00:16:15,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:16:15,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:16:15,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:16:15,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:16:15,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:16:15,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:16:15,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:16:15,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:16:15,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (1/1) ... [2022-11-26 00:16:15,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:16:15,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:15,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:16:15,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:16:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-26 00:16:15,522 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-26 00:16:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:16:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-26 00:16:15,522 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-26 00:16:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-26 00:16:15,523 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-26 00:16:15,523 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-11-26 00:16:15,523 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-11-26 00:16:15,523 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:16:15,523 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:16:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:16:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-26 00:16:15,524 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-26 00:16:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:16:15,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:16:15,525 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-26 00:16:15,525 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-26 00:16:15,713 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:16:15,715 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:16:16,373 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:16:16,505 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:16:16,505 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:16:16,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:16:16 BoogieIcfgContainer [2022-11-26 00:16:16,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:16:16,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:16:16,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:16:16,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:16:16,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:16:14" (1/3) ... [2022-11-26 00:16:16,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63afa3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:16:16, skipping insertion in model container [2022-11-26 00:16:16,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:15" (2/3) ... [2022-11-26 00:16:16,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63afa3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:16:16, skipping insertion in model container [2022-11-26 00:16:16,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:16:16" (3/3) ... [2022-11-26 00:16:16,517 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_2.ufo.UNBOUNDED.pals.c [2022-11-26 00:16:16,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:16:16,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:16:16,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:16:16,599 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;@c2a8a5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:16:16,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:16:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:16:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:16:16,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:16,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:16,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:16,621 INFO L85 PathProgramCache]: Analyzing trace with hash -587422489, now seen corresponding path program 1 times [2022-11-26 00:16:16,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:16,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675823740] [2022-11-26 00:16:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:16,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:17,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675823740] [2022-11-26 00:16:17,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675823740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:17,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:17,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:16:17,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410167676] [2022-11-26 00:16:17,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:17,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:17,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:16:17,351 INFO L87 Difference]: Start difference. First operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:16:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:17,516 INFO L93 Difference]: Finished difference Result 298 states and 487 transitions. [2022-11-26 00:16:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-26 00:16:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:17,530 INFO L225 Difference]: With dead ends: 298 [2022-11-26 00:16:17,530 INFO L226 Difference]: Without dead ends: 152 [2022-11-26 00:16:17,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:17,540 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:17,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 635 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:16:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-26 00:16:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-26 00:16:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 113 states have internal predecessors, (169), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:16:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 231 transitions. [2022-11-26 00:16:17,595 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 231 transitions. Word has length 19 [2022-11-26 00:16:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:17,596 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 231 transitions. [2022-11-26 00:16:17,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:16:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 231 transitions. [2022-11-26 00:16:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:16:17,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:17,599 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:16:17,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:16:17,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:17,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2123470677, now seen corresponding path program 1 times [2022-11-26 00:16:17,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:17,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602836492] [2022-11-26 00:16:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:17,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:17,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602836492] [2022-11-26 00:16:17,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602836492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:17,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:17,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:16:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638793613] [2022-11-26 00:16:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:17,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:16:17,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:17,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:16:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:17,796 INFO L87 Difference]: Start difference. First operand 152 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:16:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:18,155 INFO L93 Difference]: Finished difference Result 432 states and 672 transitions. [2022-11-26 00:16:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:16:18,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-11-26 00:16:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:18,167 INFO L225 Difference]: With dead ends: 432 [2022-11-26 00:16:18,168 INFO L226 Difference]: Without dead ends: 283 [2022-11-26 00:16:18,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:16:18,177 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 570 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:18,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 593 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:16:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-26 00:16:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 186. [2022-11-26 00:16:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.5106382978723405) internal successors, (213), 141 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 00:16:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2022-11-26 00:16:18,221 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 30 [2022-11-26 00:16:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:18,222 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2022-11-26 00:16:18,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:16:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2022-11-26 00:16:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:16:18,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:18,225 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:16:18,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:16:18,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1933284694, now seen corresponding path program 1 times [2022-11-26 00:16:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873565494] [2022-11-26 00:16:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:18,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:18,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873565494] [2022-11-26 00:16:18,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873565494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:18,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:18,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:16:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536123727] [2022-11-26 00:16:18,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:18,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:16:18,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:18,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:16:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:18,428 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:16:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:18,796 INFO L93 Difference]: Finished difference Result 432 states and 670 transitions. [2022-11-26 00:16:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:16:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-11-26 00:16:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:18,799 INFO L225 Difference]: With dead ends: 432 [2022-11-26 00:16:18,799 INFO L226 Difference]: Without dead ends: 283 [2022-11-26 00:16:18,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:16:18,801 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 566 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:18,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 596 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:16:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-26 00:16:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 186. [2022-11-26 00:16:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.50354609929078) internal successors, (212), 141 states have internal predecessors, (212), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 00:16:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 280 transitions. [2022-11-26 00:16:18,848 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 280 transitions. Word has length 31 [2022-11-26 00:16:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:18,849 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 280 transitions. [2022-11-26 00:16:18,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:16:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 280 transitions. [2022-11-26 00:16:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:16:18,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:18,854 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:16:18,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:16:18,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash -412159435, now seen corresponding path program 1 times [2022-11-26 00:16:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660749143] [2022-11-26 00:16:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:18,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:19,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:19,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660749143] [2022-11-26 00:16:19,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660749143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:19,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:19,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:16:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946639148] [2022-11-26 00:16:19,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:19,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:19,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:16:19,113 INFO L87 Difference]: Start difference. First operand 186 states and 280 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:16:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:19,186 INFO L93 Difference]: Finished difference Result 340 states and 514 transitions. [2022-11-26 00:16:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-26 00:16:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:19,190 INFO L225 Difference]: With dead ends: 340 [2022-11-26 00:16:19,191 INFO L226 Difference]: Without dead ends: 191 [2022-11-26 00:16:19,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:19,201 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 6 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:19,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 647 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:16:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-26 00:16:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-26 00:16:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.4896551724137932) internal successors, (216), 145 states have internal predecessors, (216), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 00:16:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 284 transitions. [2022-11-26 00:16:19,232 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 284 transitions. Word has length 33 [2022-11-26 00:16:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:19,233 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 284 transitions. [2022-11-26 00:16:19,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:16:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 284 transitions. [2022-11-26 00:16:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:16:19,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:19,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:19,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:16:19,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:19,241 INFO L85 PathProgramCache]: Analyzing trace with hash 409718619, now seen corresponding path program 1 times [2022-11-26 00:16:19,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:19,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794976373] [2022-11-26 00:16:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:19,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:19,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:19,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794976373] [2022-11-26 00:16:19,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794976373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:19,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:19,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:16:19,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182065982] [2022-11-26 00:16:19,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:19,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:16:19,485 INFO L87 Difference]: Start difference. First operand 191 states and 284 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:16:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:19,580 INFO L93 Difference]: Finished difference Result 350 states and 525 transitions. [2022-11-26 00:16:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-26 00:16:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:19,583 INFO L225 Difference]: With dead ends: 350 [2022-11-26 00:16:19,583 INFO L226 Difference]: Without dead ends: 196 [2022-11-26 00:16:19,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:19,585 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:19,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:16:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-26 00:16:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-26 00:16:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 149 states have (on average 1.476510067114094) internal successors, (220), 149 states have internal predecessors, (220), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 00:16:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 288 transitions. [2022-11-26 00:16:19,611 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 288 transitions. Word has length 41 [2022-11-26 00:16:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:19,611 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 288 transitions. [2022-11-26 00:16:19,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:16:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 288 transitions. [2022-11-26 00:16:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:16:19,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:19,613 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:16:19,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:16:19,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:19,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1785752869, now seen corresponding path program 1 times [2022-11-26 00:16:19,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:19,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026901465] [2022-11-26 00:16:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:19,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:19,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:19,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026901465] [2022-11-26 00:16:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026901465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:19,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:19,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:16:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785990893] [2022-11-26 00:16:19,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:19,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:19,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:16:19,810 INFO L87 Difference]: Start difference. First operand 196 states and 288 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:16:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:19,885 INFO L93 Difference]: Finished difference Result 359 states and 529 transitions. [2022-11-26 00:16:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:19,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-11-26 00:16:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:19,890 INFO L225 Difference]: With dead ends: 359 [2022-11-26 00:16:19,890 INFO L226 Difference]: Without dead ends: 200 [2022-11-26 00:16:19,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:19,892 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:19,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 642 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:16:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-26 00:16:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-11-26 00:16:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.4671052631578947) internal successors, (223), 152 states have internal predecessors, (223), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 00:16:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 291 transitions. [2022-11-26 00:16:19,914 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 291 transitions. Word has length 49 [2022-11-26 00:16:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 291 transitions. [2022-11-26 00:16:19,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:16:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 291 transitions. [2022-11-26 00:16:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:16:19,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:19,916 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:16:19,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:16:19,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:19,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:19,917 INFO L85 PathProgramCache]: Analyzing trace with hash -112755124, now seen corresponding path program 1 times [2022-11-26 00:16:19,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:19,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657649506] [2022-11-26 00:16:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:19,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:20,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:20,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657649506] [2022-11-26 00:16:20,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657649506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:20,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:20,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:16:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640908429] [2022-11-26 00:16:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:20,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:20,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:20,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:16:20,137 INFO L87 Difference]: Start difference. First operand 200 states and 291 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:16:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:20,236 INFO L93 Difference]: Finished difference Result 368 states and 539 transitions. [2022-11-26 00:16:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-11-26 00:16:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:20,239 INFO L225 Difference]: With dead ends: 368 [2022-11-26 00:16:20,239 INFO L226 Difference]: Without dead ends: 205 [2022-11-26 00:16:20,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:20,240 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:20,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:16:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-26 00:16:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-11-26 00:16:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 156 states have (on average 1.455128205128205) internal successors, (227), 156 states have internal predecessors, (227), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 00:16:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 295 transitions. [2022-11-26 00:16:20,258 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 295 transitions. Word has length 49 [2022-11-26 00:16:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:20,258 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 295 transitions. [2022-11-26 00:16:20,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:16:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 295 transitions. [2022-11-26 00:16:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:16:20,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:20,260 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:16:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:16:20,261 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash 336667308, now seen corresponding path program 1 times [2022-11-26 00:16:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:20,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994388793] [2022-11-26 00:16:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:16:20,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:20,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994388793] [2022-11-26 00:16:20,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994388793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:20,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:20,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:16:20,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502024075] [2022-11-26 00:16:20,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:20,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:20,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:20,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:16:20,466 INFO L87 Difference]: Start difference. First operand 205 states and 295 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:16:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:20,531 INFO L93 Difference]: Finished difference Result 379 states and 546 transitions. [2022-11-26 00:16:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2022-11-26 00:16:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:20,533 INFO L225 Difference]: With dead ends: 379 [2022-11-26 00:16:20,534 INFO L226 Difference]: Without dead ends: 211 [2022-11-26 00:16:20,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:16:20,535 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 7 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:20,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 644 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:16:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-26 00:16:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-11-26 00:16:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 161 states have internal predecessors, (232), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 00:16:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 300 transitions. [2022-11-26 00:16:20,554 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 300 transitions. Word has length 57 [2022-11-26 00:16:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:20,555 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 300 transitions. [2022-11-26 00:16:20,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:16:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 300 transitions. [2022-11-26 00:16:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 00:16:20,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:20,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:20,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:16:20,557 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:20,558 INFO L85 PathProgramCache]: Analyzing trace with hash 318354813, now seen corresponding path program 1 times [2022-11-26 00:16:20,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:20,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349440020] [2022-11-26 00:16:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:20,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:16:21,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:21,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349440020] [2022-11-26 00:16:21,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349440020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:16:21,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141239795] [2022-11-26 00:16:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:21,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:21,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:21,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:16:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:21,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:16:21,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:21,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:16:21,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141239795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:21,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:16:21,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-26 00:16:21,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493713142] [2022-11-26 00:16:21,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:21,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:16:21,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:16:21,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:16:21,454 INFO L87 Difference]: Start difference. First operand 211 states and 300 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:16:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:21,759 INFO L93 Difference]: Finished difference Result 598 states and 836 transitions. [2022-11-26 00:16:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:16:21,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2022-11-26 00:16:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:21,763 INFO L225 Difference]: With dead ends: 598 [2022-11-26 00:16:21,763 INFO L226 Difference]: Without dead ends: 398 [2022-11-26 00:16:21,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:16:21,767 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 212 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:21,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1160 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:16:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-26 00:16:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2022-11-26 00:16:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 299 states have (on average 1.4214046822742474) internal successors, (425), 300 states have internal predecessors, (425), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-26 00:16:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 555 transitions. [2022-11-26 00:16:21,806 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 555 transitions. Word has length 60 [2022-11-26 00:16:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:21,806 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 555 transitions. [2022-11-26 00:16:21,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:16:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 555 transitions. [2022-11-26 00:16:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 00:16:21,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:21,809 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:16:21,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:16:22,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:22,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1150745224, now seen corresponding path program 1 times [2022-11-26 00:16:22,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:22,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035827904] [2022-11-26 00:16:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:22,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:16:22,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:22,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035827904] [2022-11-26 00:16:22,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035827904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:16:22,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262154592] [2022-11-26 00:16:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:22,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:22,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:22,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:22,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:16:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:22,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:16:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:23,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:16:23,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262154592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:23,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815696448] [2022-11-26 00:16:23,286 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-26 00:16:23,287 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:16:23,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:16:23,296 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:16:23,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:16:28,031 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:16:28,081 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:16:28,114 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:16:28,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:16:46,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [815696448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:46,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:16:46,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-11-26 00:16:46,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709303790] [2022-11-26 00:16:46,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:46,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:16:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:46,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:16:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:16:46,176 INFO L87 Difference]: Start difference. First operand 395 states and 555 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:16:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:52,541 INFO L93 Difference]: Finished difference Result 819 states and 1158 transitions. [2022-11-26 00:16:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:16:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-11-26 00:16:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:52,547 INFO L225 Difference]: With dead ends: 819 [2022-11-26 00:16:52,547 INFO L226 Difference]: Without dead ends: 464 [2022-11-26 00:16:52,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:16:52,549 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 120 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3150 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:52,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3150 Invalid, 1910 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-26 00:16:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-11-26 00:16:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 441. [2022-11-26 00:16:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 330 states have (on average 1.4) internal successors, (462), 331 states have internal predecessors, (462), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-26 00:16:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 618 transitions. [2022-11-26 00:16:52,626 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 618 transitions. Word has length 62 [2022-11-26 00:16:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:52,626 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 618 transitions. [2022-11-26 00:16:52,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:16:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 618 transitions. [2022-11-26 00:16:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 00:16:52,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:52,628 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:16:52,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:16:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:16:52,835 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1800492968, now seen corresponding path program 1 times [2022-11-26 00:16:52,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:52,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485782453] [2022-11-26 00:16:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:52,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:16:53,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485782453] [2022-11-26 00:16:53,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485782453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:16:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074782186] [2022-11-26 00:16:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:53,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:53,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:53,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:16:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:53,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:16:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:53,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:16:53,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074782186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:53,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010041316] [2022-11-26 00:16:53,897 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-26 00:16:53,897 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:16:53,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:16:53,898 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:16:53,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:16:57,802 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:16:57,836 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:16:57,854 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:16:57,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:16,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2010041316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:16,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:17:16,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-11-26 00:17:16,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158819577] [2022-11-26 00:17:16,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:16,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:17:16,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:17:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:17:16,192 INFO L87 Difference]: Start difference. First operand 441 states and 618 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:17:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:22,971 INFO L93 Difference]: Finished difference Result 888 states and 1254 transitions. [2022-11-26 00:17:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:17:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-11-26 00:17:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:22,975 INFO L225 Difference]: With dead ends: 888 [2022-11-26 00:17:22,975 INFO L226 Difference]: Without dead ends: 522 [2022-11-26 00:17:22,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:17:22,977 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 77 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 3319 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:22,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 3319 Invalid, 2070 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-26 00:17:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-26 00:17:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 499. [2022-11-26 00:17:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 371 states have (on average 1.371967654986523) internal successors, (509), 372 states have internal predecessors, (509), 92 states have call successors, (92), 35 states have call predecessors, (92), 35 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-26 00:17:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 693 transitions. [2022-11-26 00:17:23,109 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 693 transitions. Word has length 62 [2022-11-26 00:17:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:23,110 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 693 transitions. [2022-11-26 00:17:23,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:17:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 693 transitions. [2022-11-26 00:17:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 00:17:23,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:23,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:23,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:23,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:17:23,319 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1548964461, now seen corresponding path program 1 times [2022-11-26 00:17:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:23,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444439308] [2022-11-26 00:17:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:23,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:17:23,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:23,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444439308] [2022-11-26 00:17:23,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444439308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:23,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912189209] [2022-11-26 00:17:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:23,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:23,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:23,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:23,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:17:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:17:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:24,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:17:24,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912189209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:24,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582795566] [2022-11-26 00:17:24,342 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-11-26 00:17:24,342 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:24,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:24,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:24,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:27,609 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:17:27,639 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:17:27,656 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:17:27,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:48,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [582795566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:48,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:17:48,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-11-26 00:17:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824627064] [2022-11-26 00:17:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:48,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:17:48,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:17:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:17:48,139 INFO L87 Difference]: Start difference. First operand 499 states and 693 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:17:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:57,420 INFO L93 Difference]: Finished difference Result 923 states and 1299 transitions. [2022-11-26 00:17:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:17:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2022-11-26 00:17:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:57,424 INFO L225 Difference]: With dead ends: 923 [2022-11-26 00:17:57,424 INFO L226 Difference]: Without dead ends: 568 [2022-11-26 00:17:57,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:17:57,426 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 131 mSDsluCounter, 4627 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 4946 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:57,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 4946 Invalid, 3040 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-26 00:17:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-11-26 00:17:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 519. [2022-11-26 00:17:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 385 states have (on average 1.3532467532467531) internal successors, (521), 386 states have internal predecessors, (521), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-26 00:17:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 715 transitions. [2022-11-26 00:17:57,541 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 715 transitions. Word has length 64 [2022-11-26 00:17:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:57,542 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 715 transitions. [2022-11-26 00:17:57,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:17:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 715 transitions. [2022-11-26 00:17:57,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:17:57,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:57,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:57,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:57,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:57,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash -906390962, now seen corresponding path program 1 times [2022-11-26 00:17:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:57,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34452873] [2022-11-26 00:17:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:17:57,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34452873] [2022-11-26 00:17:57,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34452873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:57,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:57,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:17:57,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990665588] [2022-11-26 00:17:57,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:57,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:17:57,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:17:57,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:17:57,880 INFO L87 Difference]: Start difference. First operand 519 states and 715 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-26 00:17:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:58,052 INFO L93 Difference]: Finished difference Result 930 states and 1308 transitions. [2022-11-26 00:17:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:17:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-11-26 00:17:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:58,057 INFO L225 Difference]: With dead ends: 930 [2022-11-26 00:17:58,057 INFO L226 Difference]: Without dead ends: 527 [2022-11-26 00:17:58,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:17:58,060 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:58,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 642 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:17:58,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-26 00:17:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2022-11-26 00:17:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 391 states have (on average 1.3478260869565217) internal successors, (527), 392 states have internal predecessors, (527), 97 states have call successors, (97), 38 states have call predecessors, (97), 38 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-26 00:17:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 721 transitions. [2022-11-26 00:17:58,214 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 721 transitions. Word has length 66 [2022-11-26 00:17:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:58,214 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 721 transitions. [2022-11-26 00:17:58,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-26 00:17:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 721 transitions. [2022-11-26 00:17:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:17:58,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:58,223 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:17:58,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:17:58,223 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:58,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:58,224 INFO L85 PathProgramCache]: Analyzing trace with hash -79097432, now seen corresponding path program 1 times [2022-11-26 00:17:58,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:58,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978680357] [2022-11-26 00:17:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:58,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:17:58,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:58,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978680357] [2022-11-26 00:17:58,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978680357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664654134] [2022-11-26 00:17:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:58,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:58,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:58,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:58,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:17:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:17:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:59,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:17:59,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664654134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040827051] [2022-11-26 00:17:59,231 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-11-26 00:17:59,232 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:59,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:59,232 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:59,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:03,455 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-11-26 00:18:03,698 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:18:03,718 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 192 for LOIs [2022-11-26 00:18:03,883 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-11-26 00:18:03,926 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-26 00:18:03,992 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:18:04,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:18:51,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16602#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:18:51,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:18:51,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:18:51,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-26 00:18:51,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245190576] [2022-11-26 00:18:51,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:18:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:18:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:18:51,021 INFO L87 Difference]: Start difference. First operand 527 states and 721 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:18:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:51,705 INFO L93 Difference]: Finished difference Result 1268 states and 1770 transitions. [2022-11-26 00:18:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:18:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2022-11-26 00:18:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:51,711 INFO L225 Difference]: With dead ends: 1268 [2022-11-26 00:18:51,712 INFO L226 Difference]: Without dead ends: 873 [2022-11-26 00:18:51,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 153 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=287, Invalid=3253, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:18:51,715 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 303 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:51,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 2542 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:18:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-26 00:18:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 549. [2022-11-26 00:18:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 406 states have (on average 1.3103448275862069) internal successors, (532), 409 states have internal predecessors, (532), 95 states have call successors, (95), 47 states have call predecessors, (95), 47 states have return successors, (95), 92 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-26 00:18:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 722 transitions. [2022-11-26 00:18:51,910 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 722 transitions. Word has length 70 [2022-11-26 00:18:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:51,910 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 722 transitions. [2022-11-26 00:18:51,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:18:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 722 transitions. [2022-11-26 00:18:51,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:18:51,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:51,912 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:18:51,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:52,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:18:52,118 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash -402698391, now seen corresponding path program 1 times [2022-11-26 00:18:52,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:52,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697599778] [2022-11-26 00:18:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:52,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:18:52,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697599778] [2022-11-26 00:18:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697599778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:52,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:52,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:18:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75006029] [2022-11-26 00:18:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:52,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:18:52,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:18:52,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:18:52,453 INFO L87 Difference]: Start difference. First operand 549 states and 722 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:18:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:53,372 INFO L93 Difference]: Finished difference Result 1207 states and 1671 transitions. [2022-11-26 00:18:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:18:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 71 [2022-11-26 00:18:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:53,380 INFO L225 Difference]: With dead ends: 1207 [2022-11-26 00:18:53,380 INFO L226 Difference]: Without dead ends: 896 [2022-11-26 00:18:53,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:18:53,389 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 670 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:53,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1647 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:18:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-26 00:18:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 683. [2022-11-26 00:18:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 503 states have (on average 1.312127236580517) internal successors, (660), 506 states have internal predecessors, (660), 119 states have call successors, (119), 60 states have call predecessors, (119), 60 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-26 00:18:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 898 transitions. [2022-11-26 00:18:53,597 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 898 transitions. Word has length 71 [2022-11-26 00:18:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:53,597 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 898 transitions. [2022-11-26 00:18:53,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:18:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 898 transitions. [2022-11-26 00:18:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:18:53,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:53,599 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:18:53,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:18:53,600 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1273014078, now seen corresponding path program 1 times [2022-11-26 00:18:53,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:53,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264234276] [2022-11-26 00:18:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:18:53,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:53,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264234276] [2022-11-26 00:18:53,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264234276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:53,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:53,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:18:53,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311674848] [2022-11-26 00:18:53,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:53,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:18:53,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:18:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:18:53,860 INFO L87 Difference]: Start difference. First operand 683 states and 898 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:18:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:54,958 INFO L93 Difference]: Finished difference Result 1582 states and 2191 transitions. [2022-11-26 00:18:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:18:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-11-26 00:18:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:54,965 INFO L225 Difference]: With dead ends: 1582 [2022-11-26 00:18:54,965 INFO L226 Difference]: Without dead ends: 1241 [2022-11-26 00:18:54,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:18:54,967 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 599 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:54,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 2321 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:18:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-11-26 00:18:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 950. [2022-11-26 00:18:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 695 states have (on average 1.3237410071942446) internal successors, (920), 700 states have internal predecessors, (920), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2022-11-26 00:18:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1258 transitions. [2022-11-26 00:18:55,225 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1258 transitions. Word has length 73 [2022-11-26 00:18:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:55,226 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1258 transitions. [2022-11-26 00:18:55,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:18:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1258 transitions. [2022-11-26 00:18:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:18:55,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:55,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 00:18:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:18:55,228 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash 209809002, now seen corresponding path program 1 times [2022-11-26 00:18:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:55,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422065087] [2022-11-26 00:18:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:18:55,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:55,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422065087] [2022-11-26 00:18:55,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422065087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:18:55,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151154717] [2022-11-26 00:18:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:55,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:55,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:55,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:55,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:18:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:55,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:18:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:18:55,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:18:55,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151154717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:55,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772727571] [2022-11-26 00:18:55,977 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-26 00:18:55,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:18:55,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:18:55,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:18:55,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:59,765 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:18:59,839 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:18:59,868 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-26 00:18:59,961 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:19:00,010 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:19:30,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1772727571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:30,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:19:30,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-11-26 00:19:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174996409] [2022-11-26 00:19:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:30,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:19:30,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:19:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:19:30,542 INFO L87 Difference]: Start difference. First operand 950 states and 1258 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-26 00:19:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:36,438 INFO L93 Difference]: Finished difference Result 1535 states and 2055 transitions. [2022-11-26 00:19:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 00:19:36,439 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 77 [2022-11-26 00:19:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:36,444 INFO L225 Difference]: With dead ends: 1535 [2022-11-26 00:19:36,444 INFO L226 Difference]: Without dead ends: 936 [2022-11-26 00:19:36,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 183 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:19:36,447 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 68 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:36,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2003 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-26 00:19:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-11-26 00:19:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 936. [2022-11-26 00:19:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 685 states have (on average 1.3226277372262774) internal successors, (906), 690 states have internal predecessors, (906), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-26 00:19:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1238 transitions. [2022-11-26 00:19:36,685 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1238 transitions. Word has length 77 [2022-11-26 00:19:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:36,686 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1238 transitions. [2022-11-26 00:19:36,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-26 00:19:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1238 transitions. [2022-11-26 00:19:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:19:36,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:36,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 00:19:36,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:36,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:19:36,894 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1901744246, now seen corresponding path program 1 times [2022-11-26 00:19:36,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:36,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083335406] [2022-11-26 00:19:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:36,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:19:37,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:37,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083335406] [2022-11-26 00:19:37,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083335406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:37,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229075433] [2022-11-26 00:19:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:37,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:37,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:37,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:37,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:19:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:37,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:19:37,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:19:37,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:37,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229075433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:37,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:37,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-26 00:19:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249176609] [2022-11-26 00:19:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:19:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:19:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:19:37,528 INFO L87 Difference]: Start difference. First operand 936 states and 1238 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:19:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:38,360 INFO L93 Difference]: Finished difference Result 1832 states and 2500 transitions. [2022-11-26 00:19:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:19:38,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-11-26 00:19:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:38,366 INFO L225 Difference]: With dead ends: 1832 [2022-11-26 00:19:38,366 INFO L226 Difference]: Without dead ends: 1116 [2022-11-26 00:19:38,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:19:38,371 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 515 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:38,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1625 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:19:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-11-26 00:19:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 936. [2022-11-26 00:19:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 685 states have (on average 1.3167883211678832) internal successors, (902), 690 states have internal predecessors, (902), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-26 00:19:38,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1234 transitions. [2022-11-26 00:19:38,656 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1234 transitions. Word has length 77 [2022-11-26 00:19:38,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:38,657 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1234 transitions. [2022-11-26 00:19:38,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:19:38,657 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1234 transitions. [2022-11-26 00:19:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:19:38,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:38,660 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:38,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:38,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:19:38,872 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:38,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2133304360, now seen corresponding path program 1 times [2022-11-26 00:19:38,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132053583] [2022-11-26 00:19:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:38,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:19:39,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132053583] [2022-11-26 00:19:39,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132053583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:39,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:39,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:19:39,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005329575] [2022-11-26 00:19:39,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:39,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:19:39,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:39,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:19:39,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:19:39,104 INFO L87 Difference]: Start difference. First operand 936 states and 1234 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:19:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:39,605 INFO L93 Difference]: Finished difference Result 1241 states and 1714 transitions. [2022-11-26 00:19:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:19:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2022-11-26 00:19:39,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:39,612 INFO L225 Difference]: With dead ends: 1241 [2022-11-26 00:19:39,612 INFO L226 Difference]: Without dead ends: 1239 [2022-11-26 00:19:39,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:19:39,614 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 171 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:39,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1541 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-11-26 00:19:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 944. [2022-11-26 00:19:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 689 states have (on average 1.3149492017416546) internal successors, (906), 696 states have internal predecessors, (906), 168 states have call successors, (168), 86 states have call predecessors, (168), 86 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2022-11-26 00:19:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1242 transitions. [2022-11-26 00:19:39,935 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1242 transitions. Word has length 80 [2022-11-26 00:19:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:39,936 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1242 transitions. [2022-11-26 00:19:39,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:19:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1242 transitions. [2022-11-26 00:19:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-26 00:19:39,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:39,939 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2022-11-26 00:19:39,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:19:39,939 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash -251265671, now seen corresponding path program 1 times [2022-11-26 00:19:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:39,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748425167] [2022-11-26 00:19:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:39,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:19:40,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748425167] [2022-11-26 00:19:40,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748425167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:40,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:40,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:19:40,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150284326] [2022-11-26 00:19:40,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:40,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:19:40,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:19:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:19:40,130 INFO L87 Difference]: Start difference. First operand 944 states and 1242 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:19:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:40,451 INFO L93 Difference]: Finished difference Result 1626 states and 2156 transitions. [2022-11-26 00:19:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:19:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2022-11-26 00:19:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:40,457 INFO L225 Difference]: With dead ends: 1626 [2022-11-26 00:19:40,457 INFO L226 Difference]: Without dead ends: 932 [2022-11-26 00:19:40,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:19:40,462 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 7 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:40,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 634 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:19:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-11-26 00:19:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 932. [2022-11-26 00:19:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 683 states have (on average 1.2913616398243046) internal successors, (882), 690 states have internal predecessors, (882), 162 states have call successors, (162), 86 states have call predecessors, (162), 86 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-26 00:19:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1206 transitions. [2022-11-26 00:19:40,776 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1206 transitions. Word has length 83 [2022-11-26 00:19:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:40,776 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1206 transitions. [2022-11-26 00:19:40,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:19:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1206 transitions. [2022-11-26 00:19:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 00:19:40,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:40,779 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2022-11-26 00:19:40,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:19:40,779 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1649238352, now seen corresponding path program 1 times [2022-11-26 00:19:40,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:40,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851601601] [2022-11-26 00:19:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:40,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:19:41,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:41,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851601601] [2022-11-26 00:19:41,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851601601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:41,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471914499] [2022-11-26 00:19:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:41,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:41,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:41,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:41,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:19:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:19:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:19:41,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:19:42,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471914499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:42,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569661271] [2022-11-26 00:19:42,094 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-26 00:19:42,095 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:42,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:42,095 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:42,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:46,959 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-11-26 00:19:47,263 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:19:47,280 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-11-26 00:19:47,387 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-11-26 00:19:47,435 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-11-26 00:19:47,494 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:19:47,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:20:43,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39294#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (<= 0 ~manual_selection_History_2~0) (= ~side2_written~0 0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:20:43,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:20:43,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:20:43,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2022-11-26 00:20:43,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687109560] [2022-11-26 00:20:43,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:20:43,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:20:43,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:20:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=3893, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:20:43,978 INFO L87 Difference]: Start difference. First operand 932 states and 1206 transitions. Second operand has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-11-26 00:20:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:45,623 INFO L93 Difference]: Finished difference Result 2259 states and 3126 transitions. [2022-11-26 00:20:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:20:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 85 [2022-11-26 00:20:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:45,631 INFO L225 Difference]: With dead ends: 2259 [2022-11-26 00:20:45,631 INFO L226 Difference]: Without dead ends: 1502 [2022-11-26 00:20:45,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 15 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-11-26 00:20:45,635 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 478 mSDsluCounter, 4356 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 4734 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:45,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 4734 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:20:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-11-26 00:20:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 911. [2022-11-26 00:20:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 668 states have (on average 1.284431137724551) internal successors, (858), 675 states have internal predecessors, (858), 156 states have call successors, (156), 86 states have call predecessors, (156), 86 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-26 00:20:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1170 transitions. [2022-11-26 00:20:45,967 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1170 transitions. Word has length 85 [2022-11-26 00:20:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:45,968 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1170 transitions. [2022-11-26 00:20:45,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-11-26 00:20:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1170 transitions. [2022-11-26 00:20:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 00:20:45,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:45,970 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:45,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:20:46,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:46,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash 821732410, now seen corresponding path program 1 times [2022-11-26 00:20:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:46,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819671761] [2022-11-26 00:20:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:20:46,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819671761] [2022-11-26 00:20:46,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819671761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:20:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435557383] [2022-11-26 00:20:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:46,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:46,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:20:46,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:20:46,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:20:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:46,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:20:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:20:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:20:46,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:20:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:20:46,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435557383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:20:46,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821394478] [2022-11-26 00:20:46,933 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-26 00:20:46,933 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:20:46,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:20:46,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:20:46,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:20:51,058 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:20:51,082 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:20:51,102 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-26 00:20:51,212 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-11-26 00:20:51,262 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:20:51,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:21:31,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1821394478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:31,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:21:31,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-26 00:21:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525642231] [2022-11-26 00:21:31,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:31,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:21:31,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:21:31,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:21:31,755 INFO L87 Difference]: Start difference. First operand 911 states and 1170 transitions. Second operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:21:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:40,641 INFO L93 Difference]: Finished difference Result 1536 states and 2008 transitions. [2022-11-26 00:21:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:21:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 85 [2022-11-26 00:21:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:40,648 INFO L225 Difference]: With dead ends: 1536 [2022-11-26 00:21:40,649 INFO L226 Difference]: Without dead ends: 946 [2022-11-26 00:21:40,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:21:40,652 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 186 mSDsluCounter, 3493 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 3773 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:40,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 3773 Invalid, 2974 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [62 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-26 00:21:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-11-26 00:21:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 914. [2022-11-26 00:21:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 670 states have (on average 1.2835820895522387) internal successors, (860), 677 states have internal predecessors, (860), 157 states have call successors, (157), 86 states have call predecessors, (157), 86 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-26 00:21:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1174 transitions. [2022-11-26 00:21:40,935 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1174 transitions. Word has length 85 [2022-11-26 00:21:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:40,936 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1174 transitions. [2022-11-26 00:21:40,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:21:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1174 transitions. [2022-11-26 00:21:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:21:40,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:40,938 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:40,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-26 00:21:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:41,144 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:21:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1080224927, now seen corresponding path program 1 times [2022-11-26 00:21:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:41,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050216254] [2022-11-26 00:21:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:21:41,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:41,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050216254] [2022-11-26 00:21:41,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050216254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:21:41,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876043722] [2022-11-26 00:21:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:41,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:41,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:41,475 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:41,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:21:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:21:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:21:41,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:21:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:21:41,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876043722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:21:41,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1099520820] [2022-11-26 00:21:41,882 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-26 00:21:41,883 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:21:41,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:21:41,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:21:41,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:21:45,465 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:21:45,490 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:21:45,517 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-26 00:21:45,625 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-26 00:21:45,675 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:21:45,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:29,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1099520820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:29,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:22:29,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-11-26 00:22:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131455605] [2022-11-26 00:22:29,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:29,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 00:22:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 00:22:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:22:29,089 INFO L87 Difference]: Start difference. First operand 914 states and 1174 transitions. Second operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:22:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:42,042 INFO L93 Difference]: Finished difference Result 1539 states and 2012 transitions. [2022-11-26 00:22:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:22:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 87 [2022-11-26 00:22:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:42,046 INFO L225 Difference]: With dead ends: 1539 [2022-11-26 00:22:42,047 INFO L226 Difference]: Without dead ends: 949 [2022-11-26 00:22:42,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 206 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=257, Invalid=2823, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:22:42,049 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 131 mSDsluCounter, 5388 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 5689 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:42,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 5689 Invalid, 4475 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-11-26 00:22:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-11-26 00:22:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 917. [2022-11-26 00:22:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 672 states have (on average 1.2827380952380953) internal successors, (862), 679 states have internal predecessors, (862), 158 states have call successors, (158), 86 states have call predecessors, (158), 86 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-26 00:22:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1178 transitions. [2022-11-26 00:22:42,312 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1178 transitions. Word has length 87 [2022-11-26 00:22:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:42,313 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1178 transitions. [2022-11-26 00:22:42,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:22:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1178 transitions. [2022-11-26 00:22:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:22:42,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:42,314 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:42,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:42,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:22:42,520 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash 308459775, now seen corresponding path program 1 times [2022-11-26 00:22:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:42,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700877080] [2022-11-26 00:22:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 00:22:42,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700877080] [2022-11-26 00:22:42,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700877080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:42,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:42,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:22:42,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117482343] [2022-11-26 00:22:42,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:42,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:22:42,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:42,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:22:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:22:42,685 INFO L87 Difference]: Start difference. First operand 917 states and 1178 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-26 00:22:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:43,006 INFO L93 Difference]: Finished difference Result 1560 states and 2026 transitions. [2022-11-26 00:22:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:22:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 92 [2022-11-26 00:22:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:43,019 INFO L225 Difference]: With dead ends: 1560 [2022-11-26 00:22:43,019 INFO L226 Difference]: Without dead ends: 905 [2022-11-26 00:22:43,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:22:43,021 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 7 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:43,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 616 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:22:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-26 00:22:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2022-11-26 00:22:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 666 states have (on average 1.2582582582582582) internal successors, (838), 673 states have internal predecessors, (838), 152 states have call successors, (152), 86 states have call predecessors, (152), 86 states have return successors, (152), 145 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-26 00:22:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1142 transitions. [2022-11-26 00:22:43,342 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1142 transitions. Word has length 92 [2022-11-26 00:22:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:43,343 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1142 transitions. [2022-11-26 00:22:43,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-26 00:22:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1142 transitions. [2022-11-26 00:22:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:22:43,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:43,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 00:22:43,345 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 341504731, now seen corresponding path program 1 times [2022-11-26 00:22:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:43,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008860982] [2022-11-26 00:22:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:22:43,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:43,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008860982] [2022-11-26 00:22:43,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008860982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:43,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453170048] [2022-11-26 00:22:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:43,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:43,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:43,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:22:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:22:43,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:22:43,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:22:44,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453170048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:44,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910351443] [2022-11-26 00:22:44,121 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-26 00:22:44,121 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:44,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:44,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:44,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:48,765 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:22:48,791 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:22:48,809 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-26 00:22:48,953 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-11-26 00:22:49,397 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:22:49,449 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:23:38,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [910351443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:38,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:23:38,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-11-26 00:23:38,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621088926] [2022-11-26 00:23:38,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:38,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-26 00:23:38,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-26 00:23:38,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:23:38,014 INFO L87 Difference]: Start difference. First operand 905 states and 1142 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:23:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:47,830 INFO L93 Difference]: Finished difference Result 1509 states and 1935 transitions. [2022-11-26 00:23:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:23:47,831 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 92 [2022-11-26 00:23:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:47,835 INFO L225 Difference]: With dead ends: 1509 [2022-11-26 00:23:47,835 INFO L226 Difference]: Without dead ends: 927 [2022-11-26 00:23:47,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 218 SyntacticMatches, 13 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:23:47,838 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 173 mSDsluCounter, 3891 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 3390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:47,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 4170 Invalid, 3390 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [72 Valid, 3318 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-26 00:23:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-11-26 00:23:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 892. [2022-11-26 00:23:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 657 states have (on average 1.2557077625570776) internal successors, (825), 664 states have internal predecessors, (825), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-26 00:23:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1121 transitions. [2022-11-26 00:23:48,090 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1121 transitions. Word has length 92 [2022-11-26 00:23:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:48,090 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1121 transitions. [2022-11-26 00:23:48,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:23:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1121 transitions. [2022-11-26 00:23:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 00:23:48,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:48,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:48,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:48,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:23:48,304 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:23:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1335337258, now seen corresponding path program 1 times [2022-11-26 00:23:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:48,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592051642] [2022-11-26 00:23:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:23:48,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:48,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592051642] [2022-11-26 00:23:48,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592051642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:48,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737219006] [2022-11-26 00:23:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:48,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:48,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:48,644 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:48,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:23:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:48,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:23:48,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:23:48,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:23:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:23:49,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737219006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:23:49,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976520866] [2022-11-26 00:23:49,031 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-26 00:23:49,031 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:23:49,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:23:49,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:23:49,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:23:53,250 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:23:53,287 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:23:53,317 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-11-26 00:23:53,730 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-26 00:23:54,134 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:23:54,179 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:24:43,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1976520866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:43,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:24:43,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-11-26 00:24:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051835096] [2022-11-26 00:24:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:43,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-26 00:24:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-26 00:24:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:24:43,406 INFO L87 Difference]: Start difference. First operand 892 states and 1121 transitions. Second operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 00:24:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:55,649 INFO L93 Difference]: Finished difference Result 1509 states and 1935 transitions. [2022-11-26 00:24:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:24:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 94 [2022-11-26 00:24:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:55,653 INFO L225 Difference]: With dead ends: 1509 [2022-11-26 00:24:55,653 INFO L226 Difference]: Without dead ends: 924 [2022-11-26 00:24:55,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 226 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:24:55,656 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 200 mSDsluCounter, 5127 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 5427 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:55,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 5427 Invalid, 4295 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [63 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-11-26 00:24:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-26 00:24:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 892. [2022-11-26 00:24:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 657 states have (on average 1.2541856925418569) internal successors, (824), 664 states have internal predecessors, (824), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-26 00:24:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1120 transitions. [2022-11-26 00:24:55,916 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1120 transitions. Word has length 94 [2022-11-26 00:24:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:55,916 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1120 transitions. [2022-11-26 00:24:55,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 00:24:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1120 transitions. [2022-11-26 00:24:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-26 00:24:55,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:55,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:55,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-26 00:24:56,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-26 00:24:56,123 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2092775645, now seen corresponding path program 1 times [2022-11-26 00:24:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:56,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451479009] [2022-11-26 00:24:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:24:56,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451479009] [2022-11-26 00:24:56,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451479009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:24:56,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638674508] [2022-11-26 00:24:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:56,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:56,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:56,474 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:56,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:24:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:24:56,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:24:56,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:24:56,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638674508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:56,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107285049] [2022-11-26 00:24:56,930 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-26 00:24:56,930 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:24:56,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:24:56,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:24:56,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:25:01,333 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:25:01,357 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:25:01,376 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-11-26 00:25:01,459 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-26 00:25:01,859 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:25:01,909 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:25:54,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2107285049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:25:54,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:25:54,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-11-26 00:25:54,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043505781] [2022-11-26 00:25:54,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:25:54,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-26 00:25:54,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:25:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-26 00:25:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:25:54,675 INFO L87 Difference]: Start difference. First operand 892 states and 1120 transitions. Second operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:26:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:07,542 INFO L93 Difference]: Finished difference Result 1496 states and 1913 transitions. [2022-11-26 00:26:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-26 00:26:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 98 [2022-11-26 00:26:07,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:07,547 INFO L225 Difference]: With dead ends: 1496 [2022-11-26 00:26:07,548 INFO L226 Difference]: Without dead ends: 914 [2022-11-26 00:26:07,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 227 SyntacticMatches, 20 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:26:07,551 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 147 mSDsluCounter, 4711 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 4992 SdHoareTripleChecker+Invalid, 4251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:07,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 4992 Invalid, 4251 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 4205 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-11-26 00:26:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-11-26 00:26:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 879. [2022-11-26 00:26:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 648 states have (on average 1.251543209876543) internal successors, (811), 655 states have internal predecessors, (811), 144 states have call successors, (144), 86 states have call predecessors, (144), 86 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2022-11-26 00:26:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1099 transitions. [2022-11-26 00:26:07,797 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1099 transitions. Word has length 98 [2022-11-26 00:26:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:07,798 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1099 transitions. [2022-11-26 00:26:07,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:26:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1099 transitions. [2022-11-26 00:26:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-26 00:26:07,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:07,800 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:07,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:26:08,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-26 00:26:08,002 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:08,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1390177477, now seen corresponding path program 1 times [2022-11-26 00:26:08,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:08,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194003039] [2022-11-26 00:26:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:08,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:26:08,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:08,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194003039] [2022-11-26 00:26:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194003039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:26:08,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:26:08,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:26:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860202909] [2022-11-26 00:26:08,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:26:08,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:26:08,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:26:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:26:08,181 INFO L87 Difference]: Start difference. First operand 879 states and 1099 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-26 00:26:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:08,518 INFO L93 Difference]: Finished difference Result 1462 states and 1860 transitions. [2022-11-26 00:26:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:26:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 108 [2022-11-26 00:26:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:08,523 INFO L225 Difference]: With dead ends: 1462 [2022-11-26 00:26:08,523 INFO L226 Difference]: Without dead ends: 867 [2022-11-26 00:26:08,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:26:08,525 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:08,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 604 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:26:08,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-26 00:26:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2022-11-26 00:26:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 606 states have (on average 1.2194719471947195) internal successors, (739), 613 states have internal predecessors, (739), 130 states have call successors, (130), 80 states have call predecessors, (130), 80 states have return successors, (130), 123 states have call predecessors, (130), 130 states have call successors, (130) [2022-11-26 00:26:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 999 transitions. [2022-11-26 00:26:08,837 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 999 transitions. Word has length 108 [2022-11-26 00:26:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:08,837 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 999 transitions. [2022-11-26 00:26:08,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-26 00:26:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 999 transitions. [2022-11-26 00:26:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 00:26:08,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:08,840 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:08,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 00:26:08,840 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash 664071991, now seen corresponding path program 1 times [2022-11-26 00:26:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:08,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221706059] [2022-11-26 00:26:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:08,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:26:09,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221706059] [2022-11-26 00:26:09,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221706059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:26:09,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:26:09,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:26:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741109900] [2022-11-26 00:26:09,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:26:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:26:09,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:26:09,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:26:09,025 INFO L87 Difference]: Start difference. First operand 817 states and 999 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-26 00:26:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:09,378 INFO L93 Difference]: Finished difference Result 1305 states and 1631 transitions. [2022-11-26 00:26:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:26:09,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 124 [2022-11-26 00:26:09,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:09,383 INFO L225 Difference]: With dead ends: 1305 [2022-11-26 00:26:09,383 INFO L226 Difference]: Without dead ends: 805 [2022-11-26 00:26:09,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:26:09,386 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 6 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:09,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 595 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:26:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-11-26 00:26:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 789. [2022-11-26 00:26:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 586 states have (on average 1.1996587030716723) internal successors, (703), 593 states have internal predecessors, (703), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-26 00:26:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 951 transitions. [2022-11-26 00:26:09,687 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 951 transitions. Word has length 124 [2022-11-26 00:26:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:09,688 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 951 transitions. [2022-11-26 00:26:09,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-26 00:26:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 951 transitions. [2022-11-26 00:26:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-26 00:26:09,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:09,692 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:09,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-26 00:26:09,692 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1389733514, now seen corresponding path program 1 times [2022-11-26 00:26:09,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:09,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586844825] [2022-11-26 00:26:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:09,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-26 00:26:10,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:10,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586844825] [2022-11-26 00:26:10,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586844825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:26:10,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916637110] [2022-11-26 00:26:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:10,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:26:10,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:26:10,063 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:26:10,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:26:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:26:10,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:26:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 00:26:10,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:26:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-26 00:26:10,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916637110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:26:10,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054546802] [2022-11-26 00:26:10,473 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-26 00:26:10,474 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:26:10,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:26:10,474 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:26:10,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:26:19,485 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-11-26 00:26:19,614 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:26:19,631 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-26 00:26:19,753 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-11-26 00:26:19,788 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-11-26 00:26:20,267 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 184 for LOIs [2022-11-26 00:26:20,730 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:27:24,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72173#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:27:24,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:27:24,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:27:24,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-11-26 00:27:24,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060007022] [2022-11-26 00:27:24,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:27:24,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:27:24,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:24,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:27:24,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-11-26 00:27:24,479 INFO L87 Difference]: Start difference. First operand 789 states and 951 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-26 00:27:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:25,886 INFO L93 Difference]: Finished difference Result 2118 states and 2709 transitions. [2022-11-26 00:27:25,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:27:25,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) Word has length 134 [2022-11-26 00:27:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:25,896 INFO L225 Difference]: With dead ends: 2118 [2022-11-26 00:27:25,896 INFO L226 Difference]: Without dead ends: 1496 [2022-11-26 00:27:25,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 324 SyntacticMatches, 23 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 64.1s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-11-26 00:27:25,899 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 535 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2327 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:25,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 2327 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:27:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-11-26 00:27:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1092. [2022-11-26 00:27:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 808 states have (on average 1.1893564356435644) internal successors, (961), 818 states have internal predecessors, (961), 172 states have call successors, (172), 111 states have call predecessors, (172), 111 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-26 00:27:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1305 transitions. [2022-11-26 00:27:26,251 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1305 transitions. Word has length 134 [2022-11-26 00:27:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:26,251 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1305 transitions. [2022-11-26 00:27:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-26 00:27:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1305 transitions. [2022-11-26 00:27:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-26 00:27:26,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:26,254 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:26,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-26 00:27:26,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:26,461 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1186200230, now seen corresponding path program 1 times [2022-11-26 00:27:26,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:26,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823540404] [2022-11-26 00:27:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:26,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-26 00:27:29,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823540404] [2022-11-26 00:27:29,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823540404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:29,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385844612] [2022-11-26 00:27:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:29,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:29,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:29,340 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:29,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:27:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:29,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:27:29,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-26 00:27:30,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-26 00:27:31,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385844612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:31,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222801249] [2022-11-26 00:27:31,205 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-11-26 00:27:31,206 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:27:31,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:27:31,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:27:31,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:27:40,845 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-11-26 00:27:40,982 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:27:41,012 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-26 00:27:41,124 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-11-26 00:27:41,159 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 122 for LOIs [2022-11-26 00:27:41,289 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-11-26 00:27:41,766 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:29:03,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77344#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:29:03,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:29:03,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:29:03,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-11-26 00:29:03,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221722706] [2022-11-26 00:29:03,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:03,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-26 00:29:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:03,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-26 00:29:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-11-26 00:29:03,894 INFO L87 Difference]: Start difference. First operand 1092 states and 1305 transitions. Second operand has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-11-26 00:29:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:11,660 INFO L93 Difference]: Finished difference Result 2864 states and 3817 transitions. [2022-11-26 00:29:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-26 00:29:11,660 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) Word has length 142 [2022-11-26 00:29:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:11,669 INFO L225 Difference]: With dead ends: 2864 [2022-11-26 00:29:11,669 INFO L226 Difference]: Without dead ends: 1981 [2022-11-26 00:29:11,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 86.0s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-11-26 00:29:11,674 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1308 mSDsluCounter, 11942 mSDsCounter, 0 mSdLazyCounter, 5174 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 12412 SdHoareTripleChecker+Invalid, 5510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 5174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:11,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 12412 Invalid, 5510 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [336 Valid, 5174 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-26 00:29:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2022-11-26 00:29:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1033. [2022-11-26 00:29:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 767 states have (on average 1.21251629726206) internal successors, (930), 779 states have internal predecessors, (930), 160 states have call successors, (160), 105 states have call predecessors, (160), 105 states have return successors, (160), 148 states have call predecessors, (160), 160 states have call successors, (160) [2022-11-26 00:29:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1250 transitions. [2022-11-26 00:29:11,978 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1250 transitions. Word has length 142 [2022-11-26 00:29:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:11,979 INFO L495 AbstractCegarLoop]: Abstraction has 1033 states and 1250 transitions. [2022-11-26 00:29:11,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-11-26 00:29:11,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1250 transitions. [2022-11-26 00:29:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:29:11,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:11,981 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:11,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:12,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:12,188 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:12,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1015045692, now seen corresponding path program 1 times [2022-11-26 00:29:12,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:12,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142493458] [2022-11-26 00:29:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:12,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:29:12,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:12,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142493458] [2022-11-26 00:29:12,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142493458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:12,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921173317] [2022-11-26 00:29:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:12,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:12,531 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:12,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66d94426-4054-426a-9ec1-32d2c4a9e937/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:29:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:12,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-26 00:29:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 00:29:13,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:29:14,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921173317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:14,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777425689] [2022-11-26 00:29:14,413 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-26 00:29:14,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:14,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:14,414 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:14,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:29:35,091 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 142 for LOIs [2022-11-26 00:29:35,380 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2022-11-26 00:29:35,386 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 96 for LOIs [2022-11-26 00:29:35,476 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 156 for LOIs [2022-11-26 00:29:35,524 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 95 for LOIs [2022-11-26 00:29:35,554 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 95 for LOIs [2022-11-26 00:29:35,579 INFO L180 IcfgInterpreter]: Interpretation finished