./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS --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 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 --- 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-8393723 [2022-11-19 07:10:33,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:10:33,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:10:33,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:10:33,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:10:33,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:10:33,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:10:33,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:10:33,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:10:33,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:10:33,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:10:33,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:10:33,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:10:33,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:10:33,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:10:33,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:10:33,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:10:33,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:10:33,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:10:33,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:10:33,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:10:33,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:10:33,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:10:33,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:10:33,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:10:33,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:10:33,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:10:33,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:10:33,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:10:33,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:10:33,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:10:33,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:10:33,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:10:33,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:10:33,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:10:33,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:10:33,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:10:33,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:10:33,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:10:33,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:10:33,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:10:33,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:10:33,251 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:10:33,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:10:33,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:10:33,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:10:33,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:10:33,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:10:33,254 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:10:33,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:10:33,254 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:10:33,254 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:10:33,255 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:10:33,256 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:10:33,256 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:10:33,256 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:10:33,256 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:10:33,257 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:10:33,257 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:10:33,257 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:10:33,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:10:33,258 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:10:33,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:10:33,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:10:33,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:10:33,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:10:33,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:10:33,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:10:33,261 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:10:33,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:10:33,262 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:10:33,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:10:33,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:10:33,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:10:33,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:33,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:10:33,263 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:10:33,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:10:33,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:10:33,264 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:10:33,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:10:33,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:10:33,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:10:33,265 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_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 [2022-11-19 07:10:33,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:10:33,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:10:33,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:10:33,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:10:33,555 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:10:33,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-19 07:10:33,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/data/65223da29/42c717244b994448806f11bea9802669/FLAGce7c61bdb [2022-11-19 07:10:34,124 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:10:34,125 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-19 07:10:34,136 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/data/65223da29/42c717244b994448806f11bea9802669/FLAGce7c61bdb [2022-11-19 07:10:34,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/data/65223da29/42c717244b994448806f11bea9802669 [2022-11-19 07:10:34,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:10:34,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:10:34,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:34,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:10:34,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:10:34,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:34,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336f4d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34, skipping insertion in model container [2022-11-19 07:10:34,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:34,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:10:34,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:10:34,744 WARN L234 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_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-11-19 07:10:34,792 WARN L234 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_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-11-19 07:10:34,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:34,844 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:10:34,855 WARN L234 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_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-11-19 07:10:34,884 WARN L234 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_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-11-19 07:10:34,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:34,948 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:10:34,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34 WrapperNode [2022-11-19 07:10:34,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:34,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:10:34,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:10:34,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:10:34,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:34,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,040 INFO L138 Inliner]: procedures = 59, calls = 66, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 518 [2022-11-19 07:10:35,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:10:35,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:10:35,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:10:35,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:10:35,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,077 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:10:35,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:10:35,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:10:35,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:10:35,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (1/1) ... [2022-11-19 07:10:35,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:35,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:35,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:10:35,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:10:35,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:10:35,172 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:10:35,173 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:10:35,173 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 07:10:35,173 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 07:10:35,173 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 07:10:35,173 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 07:10:35,174 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 07:10:35,174 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 07:10:35,174 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 07:10:35,174 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 07:10:35,174 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 07:10:35,175 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 07:10:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 07:10:35,175 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 07:10:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 07:10:35,175 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 07:10:35,176 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 07:10:35,176 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 07:10:35,176 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 07:10:35,176 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 07:10:35,176 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 07:10:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 07:10:35,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:10:35,177 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 07:10:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 07:10:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 07:10:35,180 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 07:10:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:10:35,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:10:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 07:10:35,181 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 07:10:35,321 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:10:35,331 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:10:36,009 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:10:36,282 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:10:36,282 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-19 07:10:36,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:10:36 BoogieIcfgContainer [2022-11-19 07:10:36,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:10:36,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:10:36,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:10:36,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:10:36,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:10:34" (1/3) ... [2022-11-19 07:10:36,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607b9733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:10:36, skipping insertion in model container [2022-11-19 07:10:36,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:34" (2/3) ... [2022-11-19 07:10:36,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607b9733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:10:36, skipping insertion in model container [2022-11-19 07:10:36,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:10:36" (3/3) ... [2022-11-19 07:10:36,300 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-19 07:10:36,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:10:36,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:10:36,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:10:36,419 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;@24fd3ea1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:10:36,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:10:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 113 states have (on average 1.4955752212389382) internal successors, (169), 119 states have internal predecessors, (169), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-19 07:10:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:10:36,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:36,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:36,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash -911236769, now seen corresponding path program 1 times [2022-11-19 07:10:36,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:36,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507111044] [2022-11-19 07:10:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:36,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:36,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:36,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507111044] [2022-11-19 07:10:36,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507111044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:36,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:36,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:10:36,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722584913] [2022-11-19 07:10:36,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:36,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:10:36,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:37,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:10:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:10:37,011 INFO L87 Difference]: Start difference. First operand has 161 states, 113 states have (on average 1.4955752212389382) internal successors, (169), 119 states have internal predecessors, (169), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:10:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:37,980 INFO L93 Difference]: Finished difference Result 623 states and 938 transitions. [2022-11-19 07:10:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:10:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-19 07:10:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:38,015 INFO L225 Difference]: With dead ends: 623 [2022-11-19 07:10:38,015 INFO L226 Difference]: Without dead ends: 457 [2022-11-19 07:10:38,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:10:38,031 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 631 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:38,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 648 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:10:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-19 07:10:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 446. [2022-11-19 07:10:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 327 states have (on average 1.4097859327217126) internal successors, (461), 334 states have internal predecessors, (461), 80 states have call successors, (80), 38 states have call predecessors, (80), 37 states have return successors, (104), 75 states have call predecessors, (104), 78 states have call successors, (104) [2022-11-19 07:10:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 645 transitions. [2022-11-19 07:10:38,183 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 645 transitions. Word has length 40 [2022-11-19 07:10:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:38,184 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 645 transitions. [2022-11-19 07:10:38,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:10:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 645 transitions. [2022-11-19 07:10:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:10:38,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:38,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:38,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:10:38,193 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1284385766, now seen corresponding path program 1 times [2022-11-19 07:10:38,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:38,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639719033] [2022-11-19 07:10:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:38,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:38,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:38,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639719033] [2022-11-19 07:10:38,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639719033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:38,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:38,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:10:38,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631209051] [2022-11-19 07:10:38,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:38,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:10:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:10:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:10:38,345 INFO L87 Difference]: Start difference. First operand 446 states and 645 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:10:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:38,639 INFO L93 Difference]: Finished difference Result 570 states and 807 transitions. [2022-11-19 07:10:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:10:38,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 07:10:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:38,644 INFO L225 Difference]: With dead ends: 570 [2022-11-19 07:10:38,644 INFO L226 Difference]: Without dead ends: 506 [2022-11-19 07:10:38,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:10:38,646 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 271 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:38,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 390 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:10:38,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-19 07:10:38,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2022-11-19 07:10:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 365 states have (on average 1.3917808219178083) internal successors, (508), 372 states have internal predecessors, (508), 88 states have call successors, (88), 45 states have call predecessors, (88), 44 states have return successors, (112), 83 states have call predecessors, (112), 86 states have call successors, (112) [2022-11-19 07:10:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 708 transitions. [2022-11-19 07:10:38,696 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 708 transitions. Word has length 45 [2022-11-19 07:10:38,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:38,697 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 708 transitions. [2022-11-19 07:10:38,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:10:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 708 transitions. [2022-11-19 07:10:38,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:10:38,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:38,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:38,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:10:38,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash -365411143, now seen corresponding path program 1 times [2022-11-19 07:10:38,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:38,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34510712] [2022-11-19 07:10:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:38,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:38,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34510712] [2022-11-19 07:10:38,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34510712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:38,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:38,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:10:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775022448] [2022-11-19 07:10:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:38,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:10:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:10:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:10:38,909 INFO L87 Difference]: Start difference. First operand 499 states and 708 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:10:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:39,549 INFO L93 Difference]: Finished difference Result 680 states and 929 transitions. [2022-11-19 07:10:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:10:39,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-19 07:10:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:39,554 INFO L225 Difference]: With dead ends: 680 [2022-11-19 07:10:39,555 INFO L226 Difference]: Without dead ends: 564 [2022-11-19 07:10:39,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:10:39,557 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 334 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:39,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 644 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:10:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-19 07:10:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 551. [2022-11-19 07:10:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 402 states have (on average 1.3805970149253732) internal successors, (555), 409 states have internal predecessors, (555), 96 states have call successors, (96), 52 states have call predecessors, (96), 51 states have return successors, (120), 91 states have call predecessors, (120), 94 states have call successors, (120) [2022-11-19 07:10:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 771 transitions. [2022-11-19 07:10:39,635 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 771 transitions. Word has length 45 [2022-11-19 07:10:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:39,636 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 771 transitions. [2022-11-19 07:10:39,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:10:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 771 transitions. [2022-11-19 07:10:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:10:39,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:39,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:39,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:10:39,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:39,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:39,639 INFO L85 PathProgramCache]: Analyzing trace with hash -471338478, now seen corresponding path program 1 times [2022-11-19 07:10:39,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:39,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620491762] [2022-11-19 07:10:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:39,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620491762] [2022-11-19 07:10:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620491762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:39,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:39,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:10:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653236988] [2022-11-19 07:10:39,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:39,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:39,719 INFO L87 Difference]: Start difference. First operand 551 states and 771 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:10:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:39,875 INFO L93 Difference]: Finished difference Result 879 states and 1177 transitions. [2022-11-19 07:10:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-19 07:10:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:39,883 INFO L225 Difference]: With dead ends: 879 [2022-11-19 07:10:39,883 INFO L226 Difference]: Without dead ends: 710 [2022-11-19 07:10:39,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:39,895 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 190 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:39,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 248 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:10:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-19 07:10:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 691. [2022-11-19 07:10:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 497 states have (on average 1.3380281690140845) internal successors, (665), 504 states have internal predecessors, (665), 120 states have call successors, (120), 73 states have call predecessors, (120), 72 states have return successors, (144), 115 states have call predecessors, (144), 118 states have call successors, (144) [2022-11-19 07:10:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 929 transitions. [2022-11-19 07:10:40,000 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 929 transitions. Word has length 46 [2022-11-19 07:10:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:40,000 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 929 transitions. [2022-11-19 07:10:40,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:10:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 929 transitions. [2022-11-19 07:10:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:10:40,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:40,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:40,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:10:40,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 449491853, now seen corresponding path program 1 times [2022-11-19 07:10:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:40,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891953193] [2022-11-19 07:10:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:40,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:40,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:40,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891953193] [2022-11-19 07:10:40,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891953193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:40,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:40,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:10:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278833167] [2022-11-19 07:10:40,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:40,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:40,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:40,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:40,055 INFO L87 Difference]: Start difference. First operand 691 states and 929 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:10:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:40,228 INFO L93 Difference]: Finished difference Result 1061 states and 1374 transitions. [2022-11-19 07:10:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 07:10:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:40,233 INFO L225 Difference]: With dead ends: 1061 [2022-11-19 07:10:40,233 INFO L226 Difference]: Without dead ends: 798 [2022-11-19 07:10:40,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:40,238 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 67 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:40,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 349 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:10:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-19 07:10:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 792. [2022-11-19 07:10:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 568 states have (on average 1.3257042253521127) internal successors, (753), 575 states have internal predecessors, (753), 136 states have call successors, (136), 87 states have call predecessors, (136), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2022-11-19 07:10:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1049 transitions. [2022-11-19 07:10:40,345 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1049 transitions. Word has length 47 [2022-11-19 07:10:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:40,346 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1049 transitions. [2022-11-19 07:10:40,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:10:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1049 transitions. [2022-11-19 07:10:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:10:40,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:40,348 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, 1, 1, 1, 1, 1] [2022-11-19 07:10:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:10:40,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:40,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1236058268, now seen corresponding path program 1 times [2022-11-19 07:10:40,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:40,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943726863] [2022-11-19 07:10:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:40,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:40,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:40,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943726863] [2022-11-19 07:10:40,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943726863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:40,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:40,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:10:40,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008497909] [2022-11-19 07:10:40,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:40,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:10:40,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:40,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:10:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:10:40,448 INFO L87 Difference]: Start difference. First operand 792 states and 1049 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:10:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:40,755 INFO L93 Difference]: Finished difference Result 899 states and 1175 transitions. [2022-11-19 07:10:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:10:40,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-19 07:10:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:40,760 INFO L225 Difference]: With dead ends: 899 [2022-11-19 07:10:40,761 INFO L226 Difference]: Without dead ends: 896 [2022-11-19 07:10:40,761 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 [2022-11-19 07:10:40,762 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 344 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:40,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 231 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:10:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-19 07:10:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 791. [2022-11-19 07:10:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 568 states have (on average 1.3204225352112675) internal successors, (750), 574 states have internal predecessors, (750), 135 states have call successors, (135), 87 states have call predecessors, (135), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2022-11-19 07:10:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1045 transitions. [2022-11-19 07:10:40,872 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1045 transitions. Word has length 54 [2022-11-19 07:10:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:40,872 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1045 transitions. [2022-11-19 07:10:40,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:10:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1045 transitions. [2022-11-19 07:10:40,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:10:40,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:40,874 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, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:10:40,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash 336125942, now seen corresponding path program 1 times [2022-11-19 07:10:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234057743] [2022-11-19 07:10:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:40,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:41,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:41,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234057743] [2022-11-19 07:10:41,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234057743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:10:41,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930761610] [2022-11-19 07:10:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:41,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:41,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:41,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:10:41,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:10:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:41,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:10:41,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:41,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:41,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930761610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:10:41,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501522874] [2022-11-19 07:10:41,763 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 07:10:41,763 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:10:41,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:10:41,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:10:41,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:10:44,553 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 115 for LOIs [2022-11-19 07:10:44,575 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 83 for LOIs [2022-11-19 07:10:44,583 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 111 for LOIs [2022-11-19 07:10:44,601 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 119 for LOIs [2022-11-19 07:10:45,036 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 115 for LOIs [2022-11-19 07:10:45,097 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 115 for LOIs [2022-11-19 07:10:45,156 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 115 for LOIs [2022-11-19 07:10:45,177 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 122 for LOIs [2022-11-19 07:10:45,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:10:57,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13061#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:10:57,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:10:57,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:10:57,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 07:10:57,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691086] [2022-11-19 07:10:57,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:10:57,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:10:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:10:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:10:57,084 INFO L87 Difference]: Start difference. First operand 791 states and 1045 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 07:10:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:57,637 INFO L93 Difference]: Finished difference Result 1568 states and 1973 transitions. [2022-11-19 07:10:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:10:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-19 07:10:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:57,646 INFO L225 Difference]: With dead ends: 1568 [2022-11-19 07:10:57,646 INFO L226 Difference]: Without dead ends: 1565 [2022-11-19 07:10:57,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:10:57,649 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 455 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:57,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 807 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:10:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-11-19 07:10:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1191. [2022-11-19 07:10:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 848 states have (on average 1.294811320754717) internal successors, (1098), 854 states have internal predecessors, (1098), 199 states have call successors, (199), 143 states have call predecessors, (199), 142 states have return successors, (224), 195 states have call predecessors, (224), 198 states have call successors, (224) [2022-11-19 07:10:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1521 transitions. [2022-11-19 07:10:57,769 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1521 transitions. Word has length 55 [2022-11-19 07:10:57,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:57,769 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1521 transitions. [2022-11-19 07:10:57,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 07:10:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1521 transitions. [2022-11-19 07:10:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:10:57,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:57,771 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 07:10:57,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:10:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:57,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash 992874084, now seen corresponding path program 2 times [2022-11-19 07:10:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184174629] [2022-11-19 07:10:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:10:58,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:58,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184174629] [2022-11-19 07:10:58,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184174629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:58,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:58,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:10:58,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975849366] [2022-11-19 07:10:58,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:58,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:58,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:58,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:58,024 INFO L87 Difference]: Start difference. First operand 1191 states and 1521 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:10:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:58,209 INFO L93 Difference]: Finished difference Result 1608 states and 2018 transitions. [2022-11-19 07:10:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:58,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-19 07:10:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:58,215 INFO L225 Difference]: With dead ends: 1608 [2022-11-19 07:10:58,215 INFO L226 Difference]: Without dead ends: 995 [2022-11-19 07:10:58,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:58,217 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 188 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:58,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 289 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:10:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-11-19 07:10:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 993. [2022-11-19 07:10:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 710 states have (on average 1.2901408450704226) internal successors, (916), 716 states have internal predecessors, (916), 167 states have call successors, (167), 115 states have call predecessors, (167), 114 states have return successors, (192), 163 states have call predecessors, (192), 166 states have call successors, (192) [2022-11-19 07:10:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1275 transitions. [2022-11-19 07:10:58,320 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1275 transitions. Word has length 58 [2022-11-19 07:10:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:58,321 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1275 transitions. [2022-11-19 07:10:58,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:10:58,321 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1275 transitions. [2022-11-19 07:10:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:10:58,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:58,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:58,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:10:58,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:58,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1510064802, now seen corresponding path program 1 times [2022-11-19 07:10:58,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:58,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040099061] [2022-11-19 07:10:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:58,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:10:58,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:58,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040099061] [2022-11-19 07:10:58,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040099061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:58,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:58,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:10:58,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516475398] [2022-11-19 07:10:58,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:58,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:58,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:58,397 INFO L87 Difference]: Start difference. First operand 993 states and 1275 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:10:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:58,602 INFO L93 Difference]: Finished difference Result 1624 states and 2025 transitions. [2022-11-19 07:10:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:10:58,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-19 07:10:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:58,609 INFO L225 Difference]: With dead ends: 1624 [2022-11-19 07:10:58,609 INFO L226 Difference]: Without dead ends: 1249 [2022-11-19 07:10:58,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:58,615 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 43 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:58,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 389 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:10:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-11-19 07:10:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1068. [2022-11-19 07:10:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 771 states have (on average 1.2853437094682232) internal successors, (991), 777 states have internal predecessors, (991), 174 states have call successors, (174), 122 states have call predecessors, (174), 121 states have return successors, (199), 170 states have call predecessors, (199), 173 states have call successors, (199) [2022-11-19 07:10:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1364 transitions. [2022-11-19 07:10:58,726 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1364 transitions. Word has length 61 [2022-11-19 07:10:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:58,727 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1364 transitions. [2022-11-19 07:10:58,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:10:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1364 transitions. [2022-11-19 07:10:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:10:58,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:58,730 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 07:10:58,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:10:58,730 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:58,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1013883676, now seen corresponding path program 1 times [2022-11-19 07:10:58,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:58,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881150912] [2022-11-19 07:10:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:58,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:10:58,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:58,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881150912] [2022-11-19 07:10:58,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881150912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:58,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:58,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:10:58,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121404414] [2022-11-19 07:10:58,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:58,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:10:58,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:10:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:10:58,912 INFO L87 Difference]: Start difference. First operand 1068 states and 1364 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:10:59,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:59,651 INFO L93 Difference]: Finished difference Result 2121 states and 2579 transitions. [2022-11-19 07:10:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:10:59,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-19 07:10:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:10:59,660 INFO L225 Difference]: With dead ends: 2121 [2022-11-19 07:10:59,660 INFO L226 Difference]: Without dead ends: 1436 [2022-11-19 07:10:59,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:10:59,663 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 315 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:10:59,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 545 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:10:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2022-11-19 07:10:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1387. [2022-11-19 07:10:59,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 985 states have (on average 1.2527918781725889) internal successors, (1234), 991 states have internal predecessors, (1234), 230 states have call successors, (230), 171 states have call predecessors, (230), 170 states have return successors, (255), 226 states have call predecessors, (255), 229 states have call successors, (255) [2022-11-19 07:10:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1719 transitions. [2022-11-19 07:10:59,837 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1719 transitions. Word has length 70 [2022-11-19 07:10:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:10:59,837 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 1719 transitions. [2022-11-19 07:10:59,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:10:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1719 transitions. [2022-11-19 07:10:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:10:59,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:10:59,840 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:10:59,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:10:59,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:10:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:10:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash -955459290, now seen corresponding path program 1 times [2022-11-19 07:10:59,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:10:59,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497383098] [2022-11-19 07:10:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:10:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:10:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:10:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:10:59,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:10:59,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497383098] [2022-11-19 07:10:59,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497383098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:10:59,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:10:59,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:10:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62574459] [2022-11-19 07:10:59,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:10:59,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:10:59,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:59,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:10:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:10:59,887 INFO L87 Difference]: Start difference. First operand 1387 states and 1719 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:11:00,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:00,131 INFO L93 Difference]: Finished difference Result 2359 states and 2847 transitions. [2022-11-19 07:11:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:00,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-19 07:11:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:00,138 INFO L225 Difference]: With dead ends: 2359 [2022-11-19 07:11:00,138 INFO L226 Difference]: Without dead ends: 1563 [2022-11-19 07:11:00,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:00,141 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 38 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:00,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 383 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-11-19 07:11:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1434. [2022-11-19 07:11:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1024 states have (on average 1.25390625) internal successors, (1284), 1030 states have internal predecessors, (1284), 234 states have call successors, (234), 175 states have call predecessors, (234), 174 states have return successors, (259), 230 states have call predecessors, (259), 233 states have call successors, (259) [2022-11-19 07:11:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1777 transitions. [2022-11-19 07:11:00,341 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1777 transitions. Word has length 71 [2022-11-19 07:11:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:00,341 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1777 transitions. [2022-11-19 07:11:00,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:11:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1777 transitions. [2022-11-19 07:11:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:11:00,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:00,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:00,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:11:00,349 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:00,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:00,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1468371616, now seen corresponding path program 1 times [2022-11-19 07:11:00,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:00,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981699026] [2022-11-19 07:11:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:00,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:11:00,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:00,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981699026] [2022-11-19 07:11:00,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981699026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:00,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694827433] [2022-11-19 07:11:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:00,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:00,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:00,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:00,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:11:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:00,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:11:00,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:11:00,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:00,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694827433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:00,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:00,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:11:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922554620] [2022-11-19 07:11:00,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:00,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:00,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:11:00,618 INFO L87 Difference]: Start difference. First operand 1434 states and 1777 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:11:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:01,008 INFO L93 Difference]: Finished difference Result 2162 states and 2888 transitions. [2022-11-19 07:11:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:01,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-19 07:11:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:01,017 INFO L225 Difference]: With dead ends: 2162 [2022-11-19 07:11:01,017 INFO L226 Difference]: Without dead ends: 1790 [2022-11-19 07:11:01,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:11:01,020 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 184 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:01,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 280 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-19 07:11:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1783. [2022-11-19 07:11:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1286 states have (on average 1.280715396578538) internal successors, (1647), 1295 states have internal predecessors, (1647), 291 states have call successors, (291), 205 states have call predecessors, (291), 204 states have return successors, (338), 284 states have call predecessors, (338), 290 states have call successors, (338) [2022-11-19 07:11:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2276 transitions. [2022-11-19 07:11:01,239 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2276 transitions. Word has length 73 [2022-11-19 07:11:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:01,240 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2276 transitions. [2022-11-19 07:11:01,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:11:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2276 transitions. [2022-11-19 07:11:01,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:11:01,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:01,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:01,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:11:01,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:11:01,460 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1974574050, now seen corresponding path program 1 times [2022-11-19 07:11:01,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:01,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054117050] [2022-11-19 07:11:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:01,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:11:01,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054117050] [2022-11-19 07:11:01,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054117050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:01,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:01,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:11:01,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746699649] [2022-11-19 07:11:01,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:01,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:11:01,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:01,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:11:01,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:11:01,791 INFO L87 Difference]: Start difference. First operand 1783 states and 2276 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:11:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:02,436 INFO L93 Difference]: Finished difference Result 2997 states and 4087 transitions. [2022-11-19 07:11:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:11:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-19 07:11:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:02,447 INFO L225 Difference]: With dead ends: 2997 [2022-11-19 07:11:02,448 INFO L226 Difference]: Without dead ends: 2277 [2022-11-19 07:11:02,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:11:02,451 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 400 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:02,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 446 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:11:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-11-19 07:11:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2191. [2022-11-19 07:11:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1589 states have (on average 1.2945248584015103) internal successors, (2057), 1602 states have internal predecessors, (2057), 360 states have call successors, (360), 241 states have call predecessors, (360), 240 states have return successors, (440), 349 states have call predecessors, (440), 359 states have call successors, (440) [2022-11-19 07:11:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2857 transitions. [2022-11-19 07:11:02,754 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2857 transitions. Word has length 73 [2022-11-19 07:11:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:02,755 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 2857 transitions. [2022-11-19 07:11:02,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:11:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2857 transitions. [2022-11-19 07:11:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:11:02,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:02,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:02,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:11:02,758 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -542680176, now seen corresponding path program 1 times [2022-11-19 07:11:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:02,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003829653] [2022-11-19 07:11:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:02,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:11:02,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:02,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003829653] [2022-11-19 07:11:02,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003829653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:02,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:02,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:11:02,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436443895] [2022-11-19 07:11:02,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:02,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:02,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:02,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:02,855 INFO L87 Difference]: Start difference. First operand 2191 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:11:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:03,259 INFO L93 Difference]: Finished difference Result 3421 states and 4686 transitions. [2022-11-19 07:11:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-19 07:11:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:03,272 INFO L225 Difference]: With dead ends: 3421 [2022-11-19 07:11:03,273 INFO L226 Difference]: Without dead ends: 2435 [2022-11-19 07:11:03,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:03,278 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:03,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 403 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2022-11-19 07:11:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 2310. [2022-11-19 07:11:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2310 states, 1696 states have (on average 1.3142688679245282) internal successors, (2229), 1709 states have internal predecessors, (2229), 366 states have call successors, (366), 247 states have call predecessors, (366), 246 states have return successors, (446), 355 states have call predecessors, (446), 365 states have call successors, (446) [2022-11-19 07:11:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 3041 transitions. [2022-11-19 07:11:03,596 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 3041 transitions. Word has length 74 [2022-11-19 07:11:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:03,596 INFO L495 AbstractCegarLoop]: Abstraction has 2310 states and 3041 transitions. [2022-11-19 07:11:03,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:11:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 3041 transitions. [2022-11-19 07:11:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:11:03,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:03,601 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:03,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:11:03,602 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash -475164843, now seen corresponding path program 1 times [2022-11-19 07:11:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:03,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612365088] [2022-11-19 07:11:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:03,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:11:03,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612365088] [2022-11-19 07:11:03,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612365088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:03,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527974537] [2022-11-19 07:11:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:03,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:03,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:03,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:04,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:11:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:11:04,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:04,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:04,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527974537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:04,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:04,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-19 07:11:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91410968] [2022-11-19 07:11:04,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:11:04,176 INFO L87 Difference]: Start difference. First operand 2310 states and 3041 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:11:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:04,531 INFO L93 Difference]: Finished difference Result 3135 states and 4029 transitions. [2022-11-19 07:11:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 07:11:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:04,541 INFO L225 Difference]: With dead ends: 3135 [2022-11-19 07:11:04,541 INFO L226 Difference]: Without dead ends: 2339 [2022-11-19 07:11:04,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:11:04,544 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 46 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:04,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 389 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-11-19 07:11:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2306. [2022-11-19 07:11:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1692 states have (on average 1.2960992907801419) internal successors, (2193), 1705 states have internal predecessors, (2193), 366 states have call successors, (366), 247 states have call predecessors, (366), 246 states have return successors, (446), 355 states have call predecessors, (446), 365 states have call successors, (446) [2022-11-19 07:11:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3005 transitions. [2022-11-19 07:11:04,830 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3005 transitions. Word has length 102 [2022-11-19 07:11:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:04,830 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3005 transitions. [2022-11-19 07:11:04,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:11:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3005 transitions. [2022-11-19 07:11:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:11:04,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:04,835 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-19 07:11:04,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:05,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:05,051 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1101392916, now seen corresponding path program 1 times [2022-11-19 07:11:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473182815] [2022-11-19 07:11:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:11:05,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473182815] [2022-11-19 07:11:05,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473182815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241118160] [2022-11-19 07:11:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:05,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:05,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:05,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:05,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:11:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:05,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:11:05,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:05,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:05,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241118160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:05,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:05,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 07:11:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226081222] [2022-11-19 07:11:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:05,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:11:05,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:11:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:11:05,637 INFO L87 Difference]: Start difference. First operand 2306 states and 3005 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:11:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:06,076 INFO L93 Difference]: Finished difference Result 3170 states and 4010 transitions. [2022-11-19 07:11:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:11:06,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 07:11:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:06,089 INFO L225 Difference]: With dead ends: 3170 [2022-11-19 07:11:06,089 INFO L226 Difference]: Without dead ends: 2123 [2022-11-19 07:11:06,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:11:06,093 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 182 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:06,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 823 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-11-19 07:11:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1938. [2022-11-19 07:11:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1455 states have (on average 1.3216494845360824) internal successors, (1923), 1468 states have internal predecessors, (1923), 295 states have call successors, (295), 187 states have call predecessors, (295), 186 states have return successors, (375), 284 states have call predecessors, (375), 294 states have call successors, (375) [2022-11-19 07:11:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2593 transitions. [2022-11-19 07:11:06,484 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2593 transitions. Word has length 102 [2022-11-19 07:11:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:06,485 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2593 transitions. [2022-11-19 07:11:06,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:11:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2593 transitions. [2022-11-19 07:11:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 07:11:06,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:06,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:06,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:06,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:11:06,697 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1860212688, now seen corresponding path program 1 times [2022-11-19 07:11:06,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:06,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121655329] [2022-11-19 07:11:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:06,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:11:06,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121655329] [2022-11-19 07:11:06,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121655329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:06,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:06,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:11:06,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213250192] [2022-11-19 07:11:06,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:06,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:06,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:06,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:06,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:06,756 INFO L87 Difference]: Start difference. First operand 1938 states and 2593 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:11:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:07,191 INFO L93 Difference]: Finished difference Result 4363 states and 6217 transitions. [2022-11-19 07:11:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-11-19 07:11:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:07,209 INFO L225 Difference]: With dead ends: 4363 [2022-11-19 07:11:07,209 INFO L226 Difference]: Without dead ends: 3115 [2022-11-19 07:11:07,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:07,214 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 178 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:07,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 278 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:07,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-19 07:11:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3091. [2022-11-19 07:11:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 2328 states have (on average 1.3354810996563573) internal successors, (3109), 2351 states have internal predecessors, (3109), 473 states have call successors, (473), 289 states have call predecessors, (473), 288 states have return successors, (620), 452 states have call predecessors, (620), 472 states have call successors, (620) [2022-11-19 07:11:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 4202 transitions. [2022-11-19 07:11:07,615 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 4202 transitions. Word has length 97 [2022-11-19 07:11:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:07,615 INFO L495 AbstractCegarLoop]: Abstraction has 3091 states and 4202 transitions. [2022-11-19 07:11:07,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:11:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 4202 transitions. [2022-11-19 07:11:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:11:07,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:07,624 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:07,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:11:07,624 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:07,625 INFO L85 PathProgramCache]: Analyzing trace with hash 192220974, now seen corresponding path program 1 times [2022-11-19 07:11:07,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:07,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758599491] [2022-11-19 07:11:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:07,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:11:07,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758599491] [2022-11-19 07:11:07,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758599491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:07,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794967276] [2022-11-19 07:11:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:07,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:07,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:07,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:07,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:11:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:11:07,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:11:08,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:08,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794967276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:08,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:08,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 07:11:08,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353745454] [2022-11-19 07:11:08,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:08,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:11:08,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:08,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:11:08,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:08,054 INFO L87 Difference]: Start difference. First operand 3091 states and 4202 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:11:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:08,589 INFO L93 Difference]: Finished difference Result 3640 states and 4827 transitions. [2022-11-19 07:11:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:11:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-19 07:11:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:08,605 INFO L225 Difference]: With dead ends: 3640 [2022-11-19 07:11:08,605 INFO L226 Difference]: Without dead ends: 3047 [2022-11-19 07:11:08,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:11:08,609 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 67 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:08,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1012 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2022-11-19 07:11:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2955. [2022-11-19 07:11:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2228 states have (on average 1.3429084380610412) internal successors, (2992), 2251 states have internal predecessors, (2992), 454 states have call successors, (454), 272 states have call predecessors, (454), 271 states have return successors, (601), 433 states have call predecessors, (601), 453 states have call successors, (601) [2022-11-19 07:11:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4047 transitions. [2022-11-19 07:11:08,980 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4047 transitions. Word has length 112 [2022-11-19 07:11:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:08,981 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 4047 transitions. [2022-11-19 07:11:08,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:11:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4047 transitions. [2022-11-19 07:11:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 07:11:08,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:08,989 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1] [2022-11-19 07:11:09,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:11:09,195 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash 188521773, now seen corresponding path program 1 times [2022-11-19 07:11:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:09,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706125961] [2022-11-19 07:11:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:11:09,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:09,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706125961] [2022-11-19 07:11:09,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706125961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:09,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33263809] [2022-11-19 07:11:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:09,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:09,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:09,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:09,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:11:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:11:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:11:09,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:09,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33263809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:09,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:09,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 07:11:09,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283706542] [2022-11-19 07:11:09,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:09,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:11:09,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:09,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:11:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:11:09,568 INFO L87 Difference]: Start difference. First operand 2955 states and 4047 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:11:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:10,202 INFO L93 Difference]: Finished difference Result 3704 states and 4892 transitions. [2022-11-19 07:11:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:11:10,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-19 07:11:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:10,220 INFO L225 Difference]: With dead ends: 3704 [2022-11-19 07:11:10,221 INFO L226 Difference]: Without dead ends: 3247 [2022-11-19 07:11:10,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:11:10,224 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 167 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:10,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 894 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-11-19 07:11:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3213. [2022-11-19 07:11:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 2390 states have (on average 1.3271966527196652) internal successors, (3172), 2419 states have internal predecessors, (3172), 502 states have call successors, (502), 314 states have call predecessors, (502), 319 states have return successors, (661), 481 states have call predecessors, (661), 501 states have call successors, (661) [2022-11-19 07:11:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 4335 transitions. [2022-11-19 07:11:10,667 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 4335 transitions. Word has length 113 [2022-11-19 07:11:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:10,667 INFO L495 AbstractCegarLoop]: Abstraction has 3213 states and 4335 transitions. [2022-11-19 07:11:10,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:11:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 4335 transitions. [2022-11-19 07:11:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:11:10,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:10,677 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:10,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:11:10,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:10,883 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1181390692, now seen corresponding path program 1 times [2022-11-19 07:11:10,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:10,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497885891] [2022-11-19 07:11:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:10,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:11:11,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:11,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497885891] [2022-11-19 07:11:11,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497885891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:11,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217461711] [2022-11-19 07:11:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:11,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:11,798 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:11,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:11:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:11,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:11:11,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:12,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:11:15,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217461711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:15,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [239843271] [2022-11-19 07:11:15,132 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 07:11:15,132 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:11:15,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:11:15,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:11:15,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:11:35,343 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-19 07:11:35,587 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 143 for LOIs [2022-11-19 07:11:35,631 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 134 for LOIs [2022-11-19 07:11:35,663 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-19 07:11:36,669 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-19 07:11:36,811 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 68 for LOIs [2022-11-19 07:11:36,921 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-19 07:11:37,238 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-19 07:11:37,612 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:12:07,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '105537#(and (= ~q_req_up~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (<= 1 ~c_dr_st~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:12:07,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:12:07,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:12:07,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-19 07:12:07,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276867670] [2022-11-19 07:12:07,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:12:07,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:12:07,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:12:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=10567, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 07:12:07,800 INFO L87 Difference]: Start difference. First operand 3213 states and 4335 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 07:12:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:30,306 INFO L93 Difference]: Finished difference Result 5724 states and 7251 transitions. [2022-11-19 07:12:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-19 07:12:30,307 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-19 07:12:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:30,324 INFO L225 Difference]: With dead ends: 5724 [2022-11-19 07:12:30,324 INFO L226 Difference]: Without dead ends: 5009 [2022-11-19 07:12:30,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44526 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=10062, Invalid=99168, Unknown=0, NotChecked=0, Total=109230 [2022-11-19 07:12:30,343 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 4420 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 6815 mSolverCounterSat, 2480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4421 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 9295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2480 IncrementalHoareTripleChecker+Valid, 6815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:30,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4421 Valid, 2487 Invalid, 9295 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2480 Valid, 6815 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-19 07:12:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2022-11-19 07:12:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 3489. [2022-11-19 07:12:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 2574 states have (on average 1.3142968142968143) internal successors, (3383), 2605 states have internal predecessors, (3383), 547 states have call successors, (547), 351 states have call predecessors, (547), 366 states have return successors, (718), 534 states have call predecessors, (718), 546 states have call successors, (718) [2022-11-19 07:12:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 4648 transitions. [2022-11-19 07:12:30,866 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 4648 transitions. Word has length 114 [2022-11-19 07:12:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:30,867 INFO L495 AbstractCegarLoop]: Abstraction has 3489 states and 4648 transitions. [2022-11-19 07:12:30,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 07:12:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 4648 transitions. [2022-11-19 07:12:30,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:12:30,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:30,877 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:30,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:31,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:31,083 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1339438238, now seen corresponding path program 1 times [2022-11-19 07:12:31,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:31,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883464420] [2022-11-19 07:12:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:31,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:12:31,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:31,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883464420] [2022-11-19 07:12:31,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883464420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:31,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446739249] [2022-11-19 07:12:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:31,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:31,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:31,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:31,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:12:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:12:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:12:31,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:12:31,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446739249] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:31,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:12:31,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 07:12:31,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970020032] [2022-11-19 07:12:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:31,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:12:31,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:12:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:12:31,893 INFO L87 Difference]: Start difference. First operand 3489 states and 4648 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:12:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:32,992 INFO L93 Difference]: Finished difference Result 4813 states and 6196 transitions. [2022-11-19 07:12:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:12:32,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-19 07:12:32,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:33,023 INFO L225 Difference]: With dead ends: 4813 [2022-11-19 07:12:33,024 INFO L226 Difference]: Without dead ends: 3822 [2022-11-19 07:12:33,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:12:33,032 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 303 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:33,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 436 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:12:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-11-19 07:12:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3569. [2022-11-19 07:12:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2619 states have (on average 1.3111874761359297) internal successors, (3434), 2653 states have internal predecessors, (3434), 566 states have call successors, (566), 360 states have call predecessors, (566), 382 states have return successors, (758), 557 states have call predecessors, (758), 565 states have call successors, (758) [2022-11-19 07:12:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4758 transitions. [2022-11-19 07:12:33,523 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4758 transitions. Word has length 115 [2022-11-19 07:12:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:33,524 INFO L495 AbstractCegarLoop]: Abstraction has 3569 states and 4758 transitions. [2022-11-19 07:12:33,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:12:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4758 transitions. [2022-11-19 07:12:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:12:33,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:33,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:33,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:33,740 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:33,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:33,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1765750631, now seen corresponding path program 1 times [2022-11-19 07:12:33,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:33,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12310065] [2022-11-19 07:12:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:33,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 07:12:33,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:33,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12310065] [2022-11-19 07:12:33,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12310065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:33,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025085189] [2022-11-19 07:12:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:33,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:33,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:33,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:33,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:12:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:12:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:12:34,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:34,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025085189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:34,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:34,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:12:34,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997976905] [2022-11-19 07:12:34,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:34,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:34,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:34,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:34,032 INFO L87 Difference]: Start difference. First operand 3569 states and 4758 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:34,869 INFO L93 Difference]: Finished difference Result 5931 states and 8159 transitions. [2022-11-19 07:12:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-19 07:12:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:34,884 INFO L225 Difference]: With dead ends: 5931 [2022-11-19 07:12:34,885 INFO L226 Difference]: Without dead ends: 4157 [2022-11-19 07:12:34,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:34,894 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:34,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 211 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-11-19 07:12:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4069. [2022-11-19 07:12:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 3050 states have (on average 1.3) internal successors, (3965), 3080 states have internal predecessors, (3965), 584 states have call successors, (584), 410 states have call predecessors, (584), 433 states have return successors, (783), 580 states have call predecessors, (783), 583 states have call successors, (783) [2022-11-19 07:12:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 5332 transitions. [2022-11-19 07:12:35,465 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 5332 transitions. Word has length 109 [2022-11-19 07:12:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:35,466 INFO L495 AbstractCegarLoop]: Abstraction has 4069 states and 5332 transitions. [2022-11-19 07:12:35,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:35,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 5332 transitions. [2022-11-19 07:12:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:12:35,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:35,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:35,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:35,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 07:12:35,688 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2074189640, now seen corresponding path program 1 times [2022-11-19 07:12:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861157836] [2022-11-19 07:12:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:35,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 07:12:35,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861157836] [2022-11-19 07:12:35,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861157836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201070463] [2022-11-19 07:12:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:35,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:35,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:35,847 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:35,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:12:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:12:36,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:12:36,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:36,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201070463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:36,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:36,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:12:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735703816] [2022-11-19 07:12:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:36,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:36,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:36,025 INFO L87 Difference]: Start difference. First operand 4069 states and 5332 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:36,879 INFO L93 Difference]: Finished difference Result 6695 states and 9021 transitions. [2022-11-19 07:12:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:36,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-19 07:12:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:36,897 INFO L225 Difference]: With dead ends: 6695 [2022-11-19 07:12:36,897 INFO L226 Difference]: Without dead ends: 4563 [2022-11-19 07:12:36,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:36,906 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 54 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:36,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 404 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4563 states. [2022-11-19 07:12:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4563 to 4275. [2022-11-19 07:12:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 3232 states have (on average 1.3159034653465347) internal successors, (4253), 3262 states have internal predecessors, (4253), 596 states have call successors, (596), 422 states have call predecessors, (596), 445 states have return successors, (795), 592 states have call predecessors, (795), 595 states have call successors, (795) [2022-11-19 07:12:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 5644 transitions. [2022-11-19 07:12:37,514 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 5644 transitions. Word has length 109 [2022-11-19 07:12:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:37,515 INFO L495 AbstractCegarLoop]: Abstraction has 4275 states and 5644 transitions. [2022-11-19 07:12:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 5644 transitions. [2022-11-19 07:12:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:12:37,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:37,525 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:37,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:37,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:37,730 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:37,731 INFO L85 PathProgramCache]: Analyzing trace with hash -730651071, now seen corresponding path program 2 times [2022-11-19 07:12:37,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:37,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927368267] [2022-11-19 07:12:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:37,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:12:37,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:37,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927368267] [2022-11-19 07:12:37,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927368267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:37,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140800846] [2022-11-19 07:12:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:12:37,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:37,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:37,926 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:37,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:12:38,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:12:38,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:12:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:12:38,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:12:38,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:38,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140800846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:38,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:38,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:12:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673500572] [2022-11-19 07:12:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:38,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:38,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:38,070 INFO L87 Difference]: Start difference. First operand 4275 states and 5644 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:12:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:38,958 INFO L93 Difference]: Finished difference Result 7210 states and 9929 transitions. [2022-11-19 07:12:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:38,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-19 07:12:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:38,975 INFO L225 Difference]: With dead ends: 7210 [2022-11-19 07:12:38,975 INFO L226 Difference]: Without dead ends: 4872 [2022-11-19 07:12:38,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:38,983 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 109 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:38,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 418 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2022-11-19 07:12:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 4798. [2022-11-19 07:12:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 3654 states have (on average 1.3111658456486042) internal successors, (4791), 3688 states have internal predecessors, (4791), 655 states have call successors, (655), 465 states have call predecessors, (655), 487 states have return successors, (911), 646 states have call predecessors, (911), 654 states have call successors, (911) [2022-11-19 07:12:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6357 transitions. [2022-11-19 07:12:39,714 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6357 transitions. Word has length 109 [2022-11-19 07:12:39,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:39,715 INFO L495 AbstractCegarLoop]: Abstraction has 4798 states and 6357 transitions. [2022-11-19 07:12:39,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:12:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6357 transitions. [2022-11-19 07:12:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 07:12:39,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:39,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:39,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:39,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:39,930 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash 244107795, now seen corresponding path program 1 times [2022-11-19 07:12:39,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:39,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950727119] [2022-11-19 07:12:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:39,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:12:40,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:40,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950727119] [2022-11-19 07:12:40,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950727119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:40,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064989062] [2022-11-19 07:12:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:40,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:40,127 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:40,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:12:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:40,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:12:40,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:12:40,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:40,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064989062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:40,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:40,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:12:40,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909336126] [2022-11-19 07:12:40,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:40,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:40,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:40,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:40,302 INFO L87 Difference]: Start difference. First operand 4798 states and 6357 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:12:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:41,452 INFO L93 Difference]: Finished difference Result 9794 states and 13423 transitions. [2022-11-19 07:12:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:41,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-11-19 07:12:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:41,476 INFO L225 Difference]: With dead ends: 9794 [2022-11-19 07:12:41,476 INFO L226 Difference]: Without dead ends: 6165 [2022-11-19 07:12:41,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:41,489 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 51 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:41,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 365 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6165 states. [2022-11-19 07:12:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6165 to 5238. [2022-11-19 07:12:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 4042 states have (on average 1.3337456704601682) internal successors, (5391), 4077 states have internal predecessors, (5391), 681 states have call successors, (681), 491 states have call predecessors, (681), 513 states have return successors, (937), 671 states have call predecessors, (937), 680 states have call successors, (937) [2022-11-19 07:12:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 7009 transitions. [2022-11-19 07:12:42,364 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 7009 transitions. Word has length 110 [2022-11-19 07:12:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:42,365 INFO L495 AbstractCegarLoop]: Abstraction has 5238 states and 7009 transitions. [2022-11-19 07:12:42,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:12:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 7009 transitions. [2022-11-19 07:12:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:12:42,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:42,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:42,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:42,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:12:42,581 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1003080199, now seen corresponding path program 1 times [2022-11-19 07:12:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:42,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770946545] [2022-11-19 07:12:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:42,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:12:42,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770946545] [2022-11-19 07:12:42,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770946545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295202861] [2022-11-19 07:12:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:42,773 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:42,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:12:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:42,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:12:42,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:12:43,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:43,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295202861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:43,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:43,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 07:12:43,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100541308] [2022-11-19 07:12:43,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:43,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:12:43,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:12:43,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:12:43,019 INFO L87 Difference]: Start difference. First operand 5238 states and 7009 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:12:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:44,319 INFO L93 Difference]: Finished difference Result 11196 states and 15291 transitions. [2022-11-19 07:12:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:12:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-19 07:12:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:44,344 INFO L225 Difference]: With dead ends: 11196 [2022-11-19 07:12:44,344 INFO L226 Difference]: Without dead ends: 7127 [2022-11-19 07:12:44,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:12:44,356 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 399 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:44,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 397 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:12:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2022-11-19 07:12:45,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 7125. [2022-11-19 07:12:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7125 states, 5536 states have (on average 1.330021676300578) internal successors, (7363), 5581 states have internal predecessors, (7363), 911 states have call successors, (911), 654 states have call predecessors, (911), 676 states have return successors, (1260), 891 states have call predecessors, (1260), 910 states have call successors, (1260) [2022-11-19 07:12:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7125 states to 7125 states and 9534 transitions. [2022-11-19 07:12:45,414 INFO L78 Accepts]: Start accepts. Automaton has 7125 states and 9534 transitions. Word has length 111 [2022-11-19 07:12:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:45,414 INFO L495 AbstractCegarLoop]: Abstraction has 7125 states and 9534 transitions. [2022-11-19 07:12:45,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:12:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 7125 states and 9534 transitions. [2022-11-19 07:12:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:12:45,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:45,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:45,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:45,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:12:45,633 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:45,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1746096297, now seen corresponding path program 1 times [2022-11-19 07:12:45,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:45,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220475593] [2022-11-19 07:12:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:45,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 07:12:45,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220475593] [2022-11-19 07:12:45,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220475593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951806769] [2022-11-19 07:12:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:45,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:45,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:45,724 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:45,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:12:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:12:45,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:12:45,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:45,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951806769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:45,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:45,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:12:45,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683406477] [2022-11-19 07:12:45,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:45,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:45,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:45,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:45,897 INFO L87 Difference]: Start difference. First operand 7125 states and 9534 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:47,147 INFO L93 Difference]: Finished difference Result 12540 states and 17196 transitions. [2022-11-19 07:12:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-19 07:12:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:47,172 INFO L225 Difference]: With dead ends: 12540 [2022-11-19 07:12:47,173 INFO L226 Difference]: Without dead ends: 8531 [2022-11-19 07:12:47,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:47,186 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 59 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:47,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8531 states. [2022-11-19 07:12:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8531 to 7809. [2022-11-19 07:12:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6132 states have (on average 1.3478473581213308) internal successors, (8265), 6177 states have internal predecessors, (8265), 955 states have call successors, (955), 698 states have call predecessors, (955), 720 states have return successors, (1304), 935 states have call predecessors, (1304), 954 states have call successors, (1304) [2022-11-19 07:12:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 10524 transitions. [2022-11-19 07:12:48,395 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 10524 transitions. Word has length 111 [2022-11-19 07:12:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:48,396 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 10524 transitions. [2022-11-19 07:12:48,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 10524 transitions. [2022-11-19 07:12:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:12:48,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:48,409 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:48,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:48,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:12:48,615 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:48,615 INFO L85 PathProgramCache]: Analyzing trace with hash 322754275, now seen corresponding path program 1 times [2022-11-19 07:12:48,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:48,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208858567] [2022-11-19 07:12:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:48,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:12:48,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:48,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208858567] [2022-11-19 07:12:48,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208858567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:48,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676555778] [2022-11-19 07:12:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:48,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:48,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:48,835 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:48,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:12:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:48,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:12:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:12:49,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:49,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676555778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:49,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:49,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:12:49,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969328693] [2022-11-19 07:12:49,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:49,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:49,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:49,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:49,024 INFO L87 Difference]: Start difference. First operand 7809 states and 10524 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:50,093 INFO L93 Difference]: Finished difference Result 12522 states and 17554 transitions. [2022-11-19 07:12:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-11-19 07:12:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:50,114 INFO L225 Difference]: With dead ends: 12522 [2022-11-19 07:12:50,114 INFO L226 Difference]: Without dead ends: 7829 [2022-11-19 07:12:50,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:50,126 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 90 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:50,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 412 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2022-11-19 07:12:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7757. [2022-11-19 07:12:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7757 states, 6080 states have (on average 1.3245065789473685) internal successors, (8053), 6125 states have internal predecessors, (8053), 955 states have call successors, (955), 698 states have call predecessors, (955), 720 states have return successors, (1304), 935 states have call predecessors, (1304), 954 states have call successors, (1304) [2022-11-19 07:12:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7757 states to 7757 states and 10312 transitions. [2022-11-19 07:12:51,396 INFO L78 Accepts]: Start accepts. Automaton has 7757 states and 10312 transitions. Word has length 112 [2022-11-19 07:12:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:51,396 INFO L495 AbstractCegarLoop]: Abstraction has 7757 states and 10312 transitions. [2022-11-19 07:12:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7757 states and 10312 transitions. [2022-11-19 07:12:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:12:51,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:51,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:51,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:51,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 07:12:51,606 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:51,606 INFO L85 PathProgramCache]: Analyzing trace with hash -651480987, now seen corresponding path program 1 times [2022-11-19 07:12:51,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:51,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764708708] [2022-11-19 07:12:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:51,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:12:51,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:51,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764708708] [2022-11-19 07:12:51,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764708708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:51,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282715056] [2022-11-19 07:12:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:51,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:51,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:51,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:51,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:12:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:12:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:12:52,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:52,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282715056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:52,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:52,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 07:12:52,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889898351] [2022-11-19 07:12:52,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:12:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:12:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:52,019 INFO L87 Difference]: Start difference. First operand 7757 states and 10312 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:12:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:54,251 INFO L93 Difference]: Finished difference Result 17307 states and 23235 transitions. [2022-11-19 07:12:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:12:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-19 07:12:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:54,270 INFO L225 Difference]: With dead ends: 17307 [2022-11-19 07:12:54,271 INFO L226 Difference]: Without dead ends: 10719 [2022-11-19 07:12:54,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:12:54,282 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 380 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:54,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 395 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:12:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10719 states. [2022-11-19 07:12:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10719 to 10717. [2022-11-19 07:12:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10717 states, 8418 states have (on average 1.3042290330244715) internal successors, (10979), 8478 states have internal predecessors, (10979), 1314 states have call successors, (1314), 961 states have call predecessors, (1314), 983 states have return successors, (1794), 1279 states have call predecessors, (1794), 1313 states have call successors, (1794) [2022-11-19 07:12:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10717 states to 10717 states and 14087 transitions. [2022-11-19 07:12:55,796 INFO L78 Accepts]: Start accepts. Automaton has 10717 states and 14087 transitions. Word has length 112 [2022-11-19 07:12:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:55,797 INFO L495 AbstractCegarLoop]: Abstraction has 10717 states and 14087 transitions. [2022-11-19 07:12:55,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:12:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 10717 states and 14087 transitions. [2022-11-19 07:12:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:12:55,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:55,806 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:55,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:56,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:12:56,012 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1843676902, now seen corresponding path program 1 times [2022-11-19 07:12:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781963412] [2022-11-19 07:12:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 07:12:56,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:56,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781963412] [2022-11-19 07:12:56,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781963412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:56,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009225144] [2022-11-19 07:12:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:56,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:56,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:56,099 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:56,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:12:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:56,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:12:56,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:12:56,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:56,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009225144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:56,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:56,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:12:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107876355] [2022-11-19 07:12:56,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:56,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:56,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:56,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:56,265 INFO L87 Difference]: Start difference. First operand 10717 states and 14087 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:12:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:57,919 INFO L93 Difference]: Finished difference Result 19525 states and 26071 transitions. [2022-11-19 07:12:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2022-11-19 07:12:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:57,951 INFO L225 Difference]: With dead ends: 19525 [2022-11-19 07:12:57,952 INFO L226 Difference]: Without dead ends: 13155 [2022-11-19 07:12:57,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:57,966 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 64 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:57,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 414 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2022-11-19 07:13:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 11865. [2022-11-19 07:13:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11865 states, 9390 states have (on average 1.3121405750798723) internal successors, (12321), 9450 states have internal predecessors, (12321), 1402 states have call successors, (1402), 1049 states have call predecessors, (1402), 1071 states have return successors, (1882), 1367 states have call predecessors, (1882), 1401 states have call successors, (1882) [2022-11-19 07:13:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11865 states to 11865 states and 15605 transitions. [2022-11-19 07:13:00,088 INFO L78 Accepts]: Start accepts. Automaton has 11865 states and 15605 transitions. Word has length 115 [2022-11-19 07:13:00,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:00,089 INFO L495 AbstractCegarLoop]: Abstraction has 11865 states and 15605 transitions. [2022-11-19 07:13:00,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:13:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 11865 states and 15605 transitions. [2022-11-19 07:13:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:13:00,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:00,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:00,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:00,303 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:00,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash -332806758, now seen corresponding path program 1 times [2022-11-19 07:13:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:00,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142271658] [2022-11-19 07:13:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:13:00,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:00,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142271658] [2022-11-19 07:13:00,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142271658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:00,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991911678] [2022-11-19 07:13:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:00,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:00,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:00,434 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:00,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:13:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:13:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:13:00,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:00,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991911678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:00,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:00,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-19 07:13:00,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405342056] [2022-11-19 07:13:00,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:00,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:13:00,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:00,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:13:00,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:00,613 INFO L87 Difference]: Start difference. First operand 11865 states and 15605 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:13:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:02,195 INFO L93 Difference]: Finished difference Result 17502 states and 22962 transitions. [2022-11-19 07:13:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:13:02,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-19 07:13:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:02,222 INFO L225 Difference]: With dead ends: 17502 [2022-11-19 07:13:02,222 INFO L226 Difference]: Without dead ends: 12336 [2022-11-19 07:13:02,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:02,232 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 192 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:02,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 561 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12336 states. [2022-11-19 07:13:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12336 to 12107. [2022-11-19 07:13:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12107 states, 9585 states have (on average 1.309754825247783) internal successors, (12554), 9663 states have internal predecessors, (12554), 1409 states have call successors, (1409), 1053 states have call predecessors, (1409), 1111 states have return successors, (1943), 1392 states have call predecessors, (1943), 1408 states have call successors, (1943) [2022-11-19 07:13:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12107 states to 12107 states and 15906 transitions. [2022-11-19 07:13:03,807 INFO L78 Accepts]: Start accepts. Automaton has 12107 states and 15906 transitions. Word has length 116 [2022-11-19 07:13:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:03,808 INFO L495 AbstractCegarLoop]: Abstraction has 12107 states and 15906 transitions. [2022-11-19 07:13:03,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:13:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 12107 states and 15906 transitions. [2022-11-19 07:13:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:13:03,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:03,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:03,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:04,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:04,018 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:04,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1522491441, now seen corresponding path program 1 times [2022-11-19 07:13:04,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:04,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701609187] [2022-11-19 07:13:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:04,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:13:04,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:04,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701609187] [2022-11-19 07:13:04,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701609187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:04,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402375721] [2022-11-19 07:13:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:04,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:04,076 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:04,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:13:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:04,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:13:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:13:04,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:04,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402375721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:04,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:04,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:13:04,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409784221] [2022-11-19 07:13:04,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:04,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:04,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:04,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:04,246 INFO L87 Difference]: Start difference. First operand 12107 states and 15906 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:13:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:05,736 INFO L93 Difference]: Finished difference Result 17219 states and 22776 transitions. [2022-11-19 07:13:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:05,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-19 07:13:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:05,757 INFO L225 Difference]: With dead ends: 17219 [2022-11-19 07:13:05,758 INFO L226 Difference]: Without dead ends: 11849 [2022-11-19 07:13:05,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:05,765 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:05,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 359 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11849 states. [2022-11-19 07:13:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11849 to 11849. [2022-11-19 07:13:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 9363 states have (on average 1.3094093773363238) internal successors, (12260), 9432 states have internal predecessors, (12260), 1409 states have call successors, (1409), 1053 states have call predecessors, (1409), 1075 states have return successors, (1889), 1365 states have call predecessors, (1889), 1408 states have call successors, (1889) [2022-11-19 07:13:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 15558 transitions. [2022-11-19 07:13:07,162 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 15558 transitions. Word has length 117 [2022-11-19 07:13:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:07,163 INFO L495 AbstractCegarLoop]: Abstraction has 11849 states and 15558 transitions. [2022-11-19 07:13:07,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:13:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 15558 transitions. [2022-11-19 07:13:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:13:07,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:07,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:07,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:07,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 07:13:07,372 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:07,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:07,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1849729441, now seen corresponding path program 1 times [2022-11-19 07:13:07,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:07,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399204663] [2022-11-19 07:13:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:07,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:13:07,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:07,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399204663] [2022-11-19 07:13:07,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399204663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354879346] [2022-11-19 07:13:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:07,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:07,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:07,504 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:07,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:13:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:13:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:13:07,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:07,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354879346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:07,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:07,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:13:07,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798470999] [2022-11-19 07:13:07,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:07,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:07,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:07,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:07,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:13:07,712 INFO L87 Difference]: Start difference. First operand 11849 states and 15558 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:13:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:09,687 INFO L93 Difference]: Finished difference Result 20838 states and 28005 transitions. [2022-11-19 07:13:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:09,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-19 07:13:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:09,722 INFO L225 Difference]: With dead ends: 20838 [2022-11-19 07:13:09,722 INFO L226 Difference]: Without dead ends: 13356 [2022-11-19 07:13:09,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:13:09,740 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 164 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 226 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 [2022-11-19 07:13:09,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13356 states. [2022-11-19 07:13:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13356 to 13216. [2022-11-19 07:13:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13216 states, 10622 states have (on average 1.2879871963848617) internal successors, (13681), 10691 states have internal predecessors, (13681), 1422 states have call successors, (1422), 1148 states have call predecessors, (1422), 1170 states have return successors, (2078), 1378 states have call predecessors, (2078), 1421 states have call successors, (2078) [2022-11-19 07:13:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 17181 transitions. [2022-11-19 07:13:11,440 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 17181 transitions. Word has length 117 [2022-11-19 07:13:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:11,441 INFO L495 AbstractCegarLoop]: Abstraction has 13216 states and 17181 transitions. [2022-11-19 07:13:11,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:13:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 17181 transitions. [2022-11-19 07:13:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:13:11,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:11,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:11,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:11,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-19 07:13:11,659 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:11,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1005730431, now seen corresponding path program 1 times [2022-11-19 07:13:11,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429917446] [2022-11-19 07:13:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:11,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:13:11,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:11,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429917446] [2022-11-19 07:13:11,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429917446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:11,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022425979] [2022-11-19 07:13:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:11,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:11,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:11,713 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:11,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:13:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:13:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:13:11,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:11,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022425979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:11,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:11,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:13:11,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894451724] [2022-11-19 07:13:11,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:11,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:11,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:11,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:11,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:11,888 INFO L87 Difference]: Start difference. First operand 13216 states and 17181 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:13:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:13,639 INFO L93 Difference]: Finished difference Result 21600 states and 29005 transitions. [2022-11-19 07:13:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2022-11-19 07:13:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:13,667 INFO L225 Difference]: With dead ends: 21600 [2022-11-19 07:13:13,668 INFO L226 Difference]: Without dead ends: 13191 [2022-11-19 07:13:13,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:13,681 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 87 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:13,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 424 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13191 states. [2022-11-19 07:13:15,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13191 to 13040. [2022-11-19 07:13:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13040 states, 10446 states have (on average 1.2604824813325675) internal successors, (13167), 10515 states have internal predecessors, (13167), 1422 states have call successors, (1422), 1148 states have call predecessors, (1422), 1170 states have return successors, (2078), 1378 states have call predecessors, (2078), 1421 states have call successors, (2078) [2022-11-19 07:13:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13040 states to 13040 states and 16667 transitions. [2022-11-19 07:13:15,494 INFO L78 Accepts]: Start accepts. Automaton has 13040 states and 16667 transitions. Word has length 117 [2022-11-19 07:13:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:15,494 INFO L495 AbstractCegarLoop]: Abstraction has 13040 states and 16667 transitions. [2022-11-19 07:13:15,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:13:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 13040 states and 16667 transitions. [2022-11-19 07:13:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:13:15,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:15,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:15,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:15,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:15,712 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:15,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2061203851, now seen corresponding path program 1 times [2022-11-19 07:13:15,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:15,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596546630] [2022-11-19 07:13:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:15,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:13:16,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:16,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596546630] [2022-11-19 07:13:16,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596546630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:16,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:16,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-19 07:13:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831637338] [2022-11-19 07:13:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:13:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:13:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:13:16,164 INFO L87 Difference]: Start difference. First operand 13040 states and 16667 transitions. Second operand has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 07:13:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:20,766 INFO L93 Difference]: Finished difference Result 35890 states and 47411 transitions. [2022-11-19 07:13:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:13:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 114 [2022-11-19 07:13:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:20,821 INFO L225 Difference]: With dead ends: 35890 [2022-11-19 07:13:20,821 INFO L226 Difference]: Without dead ends: 25312 [2022-11-19 07:13:20,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:13:20,837 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 966 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:20,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 566 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:13:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25312 states. [2022-11-19 07:13:23,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25312 to 22073. [2022-11-19 07:13:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22073 states, 17934 states have (on average 1.2524255603880896) internal successors, (22461), 18045 states have internal predecessors, (22461), 2238 states have call successors, (2238), 1871 states have call predecessors, (2238), 1899 states have return successors, (3260), 2158 states have call predecessors, (3260), 2237 states have call successors, (3260) [2022-11-19 07:13:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22073 states to 22073 states and 27959 transitions. [2022-11-19 07:13:23,962 INFO L78 Accepts]: Start accepts. Automaton has 22073 states and 27959 transitions. Word has length 114 [2022-11-19 07:13:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:23,962 INFO L495 AbstractCegarLoop]: Abstraction has 22073 states and 27959 transitions. [2022-11-19 07:13:23,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 07:13:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 22073 states and 27959 transitions. [2022-11-19 07:13:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:13:23,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:23,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:23,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-19 07:13:23,973 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash 46418609, now seen corresponding path program 1 times [2022-11-19 07:13:23,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:23,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380762020] [2022-11-19 07:13:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:23,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:13:24,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:24,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380762020] [2022-11-19 07:13:24,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380762020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:24,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:24,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:13:24,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64990027] [2022-11-19 07:13:24,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:24,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:13:24,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:13:24,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:24,150 INFO L87 Difference]: Start difference. First operand 22073 states and 27959 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:13:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:28,590 INFO L93 Difference]: Finished difference Result 44532 states and 56161 transitions. [2022-11-19 07:13:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:13:28,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-19 07:13:28,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:28,639 INFO L225 Difference]: With dead ends: 44532 [2022-11-19 07:13:28,639 INFO L226 Difference]: Without dead ends: 19903 [2022-11-19 07:13:28,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:13:28,667 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 120 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:28,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 582 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:13:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19903 states. [2022-11-19 07:13:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19903 to 19046. [2022-11-19 07:13:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19046 states, 15268 states have (on average 1.2196096410793817) internal successors, (18621), 15391 states have internal predecessors, (18621), 2056 states have call successors, (2056), 1698 states have call predecessors, (2056), 1720 states have return successors, (2738), 1958 states have call predecessors, (2738), 2055 states have call successors, (2738) [2022-11-19 07:13:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19046 states to 19046 states and 23415 transitions. [2022-11-19 07:13:31,437 INFO L78 Accepts]: Start accepts. Automaton has 19046 states and 23415 transitions. Word has length 115 [2022-11-19 07:13:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:31,437 INFO L495 AbstractCegarLoop]: Abstraction has 19046 states and 23415 transitions. [2022-11-19 07:13:31,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:13:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19046 states and 23415 transitions. [2022-11-19 07:13:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:13:31,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:31,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:31,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-19 07:13:31,448 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash 767769446, now seen corresponding path program 1 times [2022-11-19 07:13:31,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714674528] [2022-11-19 07:13:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:31,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:13:31,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714674528] [2022-11-19 07:13:31,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714674528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276946957] [2022-11-19 07:13:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:31,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:31,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:31,638 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:31,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:13:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:13:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:31,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:31,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276946957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:31,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:31,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:13:31,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419117570] [2022-11-19 07:13:31,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:13:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:13:31,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:13:31,855 INFO L87 Difference]: Start difference. First operand 19046 states and 23415 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:13:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:36,147 INFO L93 Difference]: Finished difference Result 39065 states and 48550 transitions. [2022-11-19 07:13:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:13:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-19 07:13:36,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:36,200 INFO L225 Difference]: With dead ends: 39065 [2022-11-19 07:13:36,201 INFO L226 Difference]: Without dead ends: 25732 [2022-11-19 07:13:36,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:13:36,219 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 222 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:36,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 539 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:13:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25732 states. [2022-11-19 07:13:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25732 to 24258. [2022-11-19 07:13:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24258 states, 19411 states have (on average 1.2069445159960848) internal successors, (23428), 19548 states have internal predecessors, (23428), 2666 states have call successors, (2666), 2173 states have call predecessors, (2666), 2179 states have return successors, (3773), 2538 states have call predecessors, (3773), 2665 states have call successors, (3773) [2022-11-19 07:13:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24258 states to 24258 states and 29867 transitions. [2022-11-19 07:13:39,844 INFO L78 Accepts]: Start accepts. Automaton has 24258 states and 29867 transitions. Word has length 116 [2022-11-19 07:13:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:39,844 INFO L495 AbstractCegarLoop]: Abstraction has 24258 states and 29867 transitions. [2022-11-19 07:13:39,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:13:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 24258 states and 29867 transitions. [2022-11-19 07:13:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:13:39,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:39,851 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1] [2022-11-19 07:13:39,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:40,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-19 07:13:40,052 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash -480707774, now seen corresponding path program 1 times [2022-11-19 07:13:40,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:40,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185504427] [2022-11-19 07:13:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:40,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:13:41,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:41,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185504427] [2022-11-19 07:13:41,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185504427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:41,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459933692] [2022-11-19 07:13:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:41,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:41,043 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:41,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:13:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:13:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:13:42,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:13:44,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459933692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:44,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622918309] [2022-11-19 07:13:44,226 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 07:13:44,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:44,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:44,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:44,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:51,018 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-19 07:13:51,402 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 140 for LOIs [2022-11-19 07:13:51,427 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 70 for LOIs [2022-11-19 07:13:51,436 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-19 07:13:52,544 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-19 07:13:52,683 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 70 for LOIs [2022-11-19 07:13:52,795 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-19 07:13:53,298 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-19 07:13:53,650 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:14:24,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '805538#(and (= ~q_req_up~0 1) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~c_dr_pc~0 1) (<= 2 ~E_2~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:14:24,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:14:24,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:14:24,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-19 07:14:24,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934071575] [2022-11-19 07:14:24,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:14:24,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 07:14:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 07:14:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=11246, Unknown=0, NotChecked=0, Total=12210 [2022-11-19 07:14:24,800 INFO L87 Difference]: Start difference. First operand 24258 states and 29867 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 07:14:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:45,591 INFO L93 Difference]: Finished difference Result 26542 states and 32569 transitions. [2022-11-19 07:14:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-19 07:14:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-19 07:14:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:45,640 INFO L225 Difference]: With dead ends: 26542 [2022-11-19 07:14:45,640 INFO L226 Difference]: Without dead ends: 25471 [2022-11-19 07:14:45,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 318 SyntacticMatches, 6 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26825 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=6762, Invalid=61620, Unknown=0, NotChecked=0, Total=68382 [2022-11-19 07:14:45,650 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 5058 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 8433 mSolverCounterSat, 3514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5058 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 11947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3514 IncrementalHoareTripleChecker+Valid, 8433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:45,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5058 Valid, 2796 Invalid, 11947 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3514 Valid, 8433 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-19 07:14:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25471 states. [2022-11-19 07:14:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25471 to 24074. [2022-11-19 07:14:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24074 states, 19299 states have (on average 1.2073164412663868) internal successors, (23300), 19435 states have internal predecessors, (23300), 2626 states have call successors, (2626), 2141 states have call predecessors, (2626), 2147 states have return successors, (3723), 2499 states have call predecessors, (3723), 2625 states have call successors, (3723) [2022-11-19 07:14:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24074 states to 24074 states and 29649 transitions. [2022-11-19 07:14:49,661 INFO L78 Accepts]: Start accepts. Automaton has 24074 states and 29649 transitions. Word has length 124 [2022-11-19 07:14:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:49,661 INFO L495 AbstractCegarLoop]: Abstraction has 24074 states and 29649 transitions. [2022-11-19 07:14:49,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 07:14:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 24074 states and 29649 transitions. [2022-11-19 07:14:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:14:49,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:49,668 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-11-19 07:14:49,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:49,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-19 07:14:49,868 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 300997334, now seen corresponding path program 1 times [2022-11-19 07:14:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:49,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108475111] [2022-11-19 07:14:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:14:50,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108475111] [2022-11-19 07:14:50,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108475111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:50,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868140163] [2022-11-19 07:14:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:50,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:50,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:50,044 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:50,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 07:14:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:50,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:14:50,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:14:50,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:14:50,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868140163] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:50,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:14:50,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 07:14:50,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740181866] [2022-11-19 07:14:50,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:50,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:14:50,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:50,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:14:50,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:14:50,489 INFO L87 Difference]: Start difference. First operand 24074 states and 29649 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:14:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:55,510 INFO L93 Difference]: Finished difference Result 24729 states and 30390 transitions. [2022-11-19 07:14:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:14:55,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-19 07:14:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:55,551 INFO L225 Difference]: With dead ends: 24729 [2022-11-19 07:14:55,551 INFO L226 Difference]: Without dead ends: 23842 [2022-11-19 07:14:55,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:14:55,559 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 408 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:55,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 533 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:14:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23842 states. [2022-11-19 07:14:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23842 to 23805. [2022-11-19 07:14:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23805 states, 19100 states have (on average 1.2070680628272252) internal successors, (23055), 19236 states have internal predecessors, (23055), 2590 states have call successors, (2590), 2111 states have call predecessors, (2590), 2113 states have return successors, (3682), 2459 states have call predecessors, (3682), 2589 states have call successors, (3682) [2022-11-19 07:14:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23805 states to 23805 states and 29327 transitions. [2022-11-19 07:14:59,423 INFO L78 Accepts]: Start accepts. Automaton has 23805 states and 29327 transitions. Word has length 125 [2022-11-19 07:14:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:59,423 INFO L495 AbstractCegarLoop]: Abstraction has 23805 states and 29327 transitions. [2022-11-19 07:14:59,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:14:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23805 states and 29327 transitions. [2022-11-19 07:14:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:14:59,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:59,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:59,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:59,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-19 07:14:59,635 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:59,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:59,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2075686238, now seen corresponding path program 1 times [2022-11-19 07:14:59,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:59,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892581700] [2022-11-19 07:14:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:59,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 07:14:59,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:59,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892581700] [2022-11-19 07:14:59,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892581700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:59,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653181029] [2022-11-19 07:14:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:59,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:59,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:59,773 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:59,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:14:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:59,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:14:59,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:15:00,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:15:00,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653181029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:15:00,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:15:00,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:15:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899604624] [2022-11-19 07:15:00,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:15:00,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:15:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:15:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:15:00,005 INFO L87 Difference]: Start difference. First operand 23805 states and 29327 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:15:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:04,500 INFO L93 Difference]: Finished difference Result 42701 states and 53690 transitions. [2022-11-19 07:15:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:15:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-11-19 07:15:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:04,553 INFO L225 Difference]: With dead ends: 42701 [2022-11-19 07:15:04,553 INFO L226 Difference]: Without dead ends: 26600 [2022-11-19 07:15:04,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:15:04,575 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 165 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 226 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 [2022-11-19 07:15:04,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:15:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26600 states. [2022-11-19 07:15:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26600 to 25780. [2022-11-19 07:15:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25780 states, 20892 states have (on average 1.185669155657668) internal successors, (24771), 21121 states have internal predecessors, (24771), 2590 states have call successors, (2590), 2186 states have call predecessors, (2590), 2296 states have return successors, (3884), 2474 states have call predecessors, (3884), 2589 states have call successors, (3884) [2022-11-19 07:15:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25780 states to 25780 states and 31245 transitions. [2022-11-19 07:15:09,736 INFO L78 Accepts]: Start accepts. Automaton has 25780 states and 31245 transitions. Word has length 141 [2022-11-19 07:15:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:09,736 INFO L495 AbstractCegarLoop]: Abstraction has 25780 states and 31245 transitions. [2022-11-19 07:15:09,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:15:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25780 states and 31245 transitions. [2022-11-19 07:15:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 07:15:09,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:09,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:09,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:09,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 07:15:09,953 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:09,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1258180528, now seen corresponding path program 1 times [2022-11-19 07:15:09,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:09,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287903524] [2022-11-19 07:15:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:09,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:15:10,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287903524] [2022-11-19 07:15:10,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287903524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55348572] [2022-11-19 07:15:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:10,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:10,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:10,184 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:15:10,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:15:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:15:10,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:15:10,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:15:10,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55348572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:15:10,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:15:10,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:15:10,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269943715] [2022-11-19 07:15:10,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:15:10,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:15:10,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:15:10,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:15:10,423 INFO L87 Difference]: Start difference. First operand 25780 states and 31245 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:15:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:16,770 INFO L93 Difference]: Finished difference Result 51013 states and 62498 transitions. [2022-11-19 07:15:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:15:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-19 07:15:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:16,837 INFO L225 Difference]: With dead ends: 51013 [2022-11-19 07:15:16,838 INFO L226 Difference]: Without dead ends: 33309 [2022-11-19 07:15:16,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:15:16,860 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 236 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:16,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 531 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:15:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33309 states. [2022-11-19 07:15:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33309 to 31635. [2022-11-19 07:15:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31635 states, 25583 states have (on average 1.1759371457608567) internal successors, (30084), 25881 states have internal predecessors, (30084), 3224 states have call successors, (3224), 2694 states have call predecessors, (3224), 2826 states have return successors, (5177), 3061 states have call predecessors, (5177), 3223 states have call successors, (5177) [2022-11-19 07:15:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31635 states to 31635 states and 38485 transitions. [2022-11-19 07:15:23,381 INFO L78 Accepts]: Start accepts. Automaton has 31635 states and 38485 transitions. Word has length 144 [2022-11-19 07:15:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:23,381 INFO L495 AbstractCegarLoop]: Abstraction has 31635 states and 38485 transitions. [2022-11-19 07:15:23,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:15:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 31635 states and 38485 transitions. [2022-11-19 07:15:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 07:15:23,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:23,397 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1] [2022-11-19 07:15:23,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:23,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:23,598 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1919255000, now seen corresponding path program 1 times [2022-11-19 07:15:23,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:23,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436998268] [2022-11-19 07:15:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:15:24,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436998268] [2022-11-19 07:15:24,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436998268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:24,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376913713] [2022-11-19 07:15:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:24,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:24,434 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:15:24,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 07:15:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:15:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:15:24,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-19 07:15:25,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376913713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:25,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1633427908] [2022-11-19 07:15:25,170 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-19 07:15:25,170 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:15:25,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:15:25,171 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:15:25,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:15:51,621 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2022-11-19 07:16:08,207 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 70 for LOIs [2022-11-19 07:16:08,217 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 212 for LOIs [2022-11-19 07:16:08,286 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 70 for LOIs [2022-11-19 07:16:08,441 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 70 for LOIs [2022-11-19 07:16:09,204 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 244 for LOIs [2022-11-19 07:16:21,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:16:43,643 WARN L233 SmtUtils]: Spent 19.95s on a formula simplification. DAG size of input: 425 DAG size of output: 375 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:17:00,754 WARN L233 SmtUtils]: Spent 7.97s on a formula simplification. DAG size of input: 482 DAG size of output: 338 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:17:19,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1156037#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:19,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:19,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:19,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-19 07:17:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819553837] [2022-11-19 07:17:19,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:17:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:17:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=4987, Unknown=0, NotChecked=0, Total=5402 [2022-11-19 07:17:19,494 INFO L87 Difference]: Start difference. First operand 31635 states and 38485 transitions. Second operand has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-19 07:17:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:29,198 INFO L93 Difference]: Finished difference Result 54377 states and 66315 transitions. [2022-11-19 07:17:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-19 07:17:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 159 [2022-11-19 07:17:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:29,238 INFO L225 Difference]: With dead ends: 54377 [2022-11-19 07:17:29,238 INFO L226 Difference]: Without dead ends: 23406 [2022-11-19 07:17:29,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 486 SyntacticMatches, 4 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14128 ImplicationChecksByTransitivity, 60.3s TimeCoverageRelationStatistics Valid=1910, Invalid=31032, Unknown=0, NotChecked=0, Total=32942 [2022-11-19 07:17:29,267 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1988 mSDsluCounter, 3674 mSDsCounter, 0 mSdLazyCounter, 4233 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2007 SdHoareTripleChecker+Valid, 4009 SdHoareTripleChecker+Invalid, 4957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 4233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:29,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2007 Valid, 4009 Invalid, 4957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 4233 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 07:17:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23406 states. [2022-11-19 07:17:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23406 to 17072. [2022-11-19 07:17:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17072 states, 13810 states have (on average 1.1555394641564083) internal successors, (15958), 13898 states have internal predecessors, (15958), 1706 states have call successors, (1706), 1526 states have call predecessors, (1706), 1554 states have return successors, (2282), 1648 states have call predecessors, (2282), 1705 states have call successors, (2282) [2022-11-19 07:17:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17072 states to 17072 states and 19946 transitions. [2022-11-19 07:17:32,930 INFO L78 Accepts]: Start accepts. Automaton has 17072 states and 19946 transitions. Word has length 159 [2022-11-19 07:17:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:32,931 INFO L495 AbstractCegarLoop]: Abstraction has 17072 states and 19946 transitions. [2022-11-19 07:17:32,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-19 07:17:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 17072 states and 19946 transitions. [2022-11-19 07:17:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-19 07:17:32,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:32,941 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:32,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:33,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:33,142 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:33,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2021320345, now seen corresponding path program 1 times [2022-11-19 07:17:33,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:33,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017705907] [2022-11-19 07:17:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:33,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 07:17:33,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:33,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017705907] [2022-11-19 07:17:33,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017705907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:33,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644232606] [2022-11-19 07:17:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:33,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:33,380 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:33,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b91dd42-2c98-4e0f-bb73-00c58fd3e00c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 07:17:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:33,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:17:33,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 111 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:17:33,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-19 07:17:34,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644232606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:34,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276433764] [2022-11-19 07:17:34,104 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-19 07:17:34,104 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:34,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:17:34,105 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:17:34,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs