./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.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_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/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_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/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_f1e029ee-fb73-4163-8f52-178f5be15bb1/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 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 --- 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 08:33:52,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:33:52,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:33:53,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:33:53,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:33:53,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:33:53,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:33:53,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:33:53,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:33:53,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:33:53,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:33:53,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:33:53,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:33:53,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:33:53,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:33:53,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:33:53,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:33:53,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:33:53,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:33:53,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:33:53,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:33:53,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:33:53,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:33:53,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:33:53,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:33:53,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:33:53,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:33:53,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:33:53,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:33:53,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:33:53,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:33:53,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:33:53,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:33:53,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:33:53,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:33:53,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:33:53,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:33:53,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:33:53,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:33:53,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:33:53,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:33:53,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:33:53,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:33:53,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:33:53,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:33:53,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:33:53,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:33:53,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:33:53,165 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:33:53,165 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:33:53,165 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:33:53,166 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:33:53,167 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:33:53,167 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:33:53,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:33:53,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:33:53,168 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:33:53,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:33:53,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:33:53,168 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:33:53,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:33:53,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:33:53,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:33:53,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:33:53,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:33:53,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:33:53,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:33:53,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:33:53,171 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:33:53,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:33:53,173 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:33:53,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:33:53,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:33:53,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:33:53,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:33:53,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:33:53,174 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:33:53,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:33:53,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:33:53,175 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:33:53,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:33:53,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:33:53,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:33:53,176 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_f1e029ee-fb73-4163-8f52-178f5be15bb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 [2022-11-19 08:33:53,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:33:53,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:33:53,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:33:53,574 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:33:53,575 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:33:53,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2022-11-19 08:33:53,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/data/ac4e466d3/8c6b315714ac4d85aceefcad91eddec8/FLAGc8ff39e4b [2022-11-19 08:33:54,320 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:33:54,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2022-11-19 08:33:54,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/data/ac4e466d3/8c6b315714ac4d85aceefcad91eddec8/FLAGc8ff39e4b [2022-11-19 08:33:54,612 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/data/ac4e466d3/8c6b315714ac4d85aceefcad91eddec8 [2022-11-19 08:33:54,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:33:54,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:33:54,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:33:54,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:33:54,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:33:54,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:33:54" (1/1) ... [2022-11-19 08:33:54,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb339e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:54, skipping insertion in model container [2022-11-19 08:33:54,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:33:54" (1/1) ... [2022-11-19 08:33:54,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:33:54,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:33:54,933 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_f1e029ee-fb73-4163-8f52-178f5be15bb1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2022-11-19 08:33:55,039 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_f1e029ee-fb73-4163-8f52-178f5be15bb1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2022-11-19 08:33:55,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:33:55,141 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:33:55,159 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_f1e029ee-fb73-4163-8f52-178f5be15bb1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2022-11-19 08:33:55,200 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_f1e029ee-fb73-4163-8f52-178f5be15bb1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2022-11-19 08:33:55,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:33:55,246 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:33:55,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55 WrapperNode [2022-11-19 08:33:55,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:33:55,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:33:55,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:33:55,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:33:55,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,352 INFO L138 Inliner]: procedures = 57, calls = 63, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 460 [2022-11-19 08:33:55,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:33:55,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:33:55,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:33:55,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:33:55,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,441 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:33:55,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:33:55,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:33:55,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:33:55,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (1/1) ... [2022-11-19 08:33:55,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:33:55,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:55,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:33:55,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:33:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:33:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:33:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:33:55,554 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 08:33:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 08:33:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 08:33:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 08:33:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 08:33:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 08:33:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 08:33:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 08:33:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 08:33:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 08:33:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 08:33:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 08:33:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 08:33:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 08:33:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 08:33:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 08:33:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 08:33:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 08:33:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 08:33:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 08:33:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:33:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 08:33:55,558 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 08:33:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 08:33:55,558 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 08:33:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:33:55,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:33:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 08:33:55,559 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 08:33:55,713 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:33:55,716 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:33:56,466 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:33:56,831 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:33:56,832 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-19 08:33:56,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:33:56 BoogieIcfgContainer [2022-11-19 08:33:56,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:33:56,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:33:56,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:33:56,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:33:56,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:33:54" (1/3) ... [2022-11-19 08:33:56,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304e8f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:33:56, skipping insertion in model container [2022-11-19 08:33:56,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:33:55" (2/3) ... [2022-11-19 08:33:56,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304e8f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:33:56, skipping insertion in model container [2022-11-19 08:33:56,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:33:56" (3/3) ... [2022-11-19 08:33:56,851 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2022-11-19 08:33:56,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:33:56,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:33:56,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:33:57,002 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;@31de3f0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:33:57,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:33:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 109 states have internal predecessors, (153), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 08:33:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:33:57,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:57,029 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] [2022-11-19 08:33:57,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:57,040 INFO L85 PathProgramCache]: Analyzing trace with hash -808074872, now seen corresponding path program 1 times [2022-11-19 08:33:57,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626093567] [2022-11-19 08:33:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:57,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:57,674 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 08:33:57,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626093567] [2022-11-19 08:33:57,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626093567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:57,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:57,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:33:57,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543478070] [2022-11-19 08:33:57,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:57,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:57,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:57,736 INFO L87 Difference]: Start difference. First operand has 150 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 109 states have internal predecessors, (153), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 08:33:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:58,709 INFO L93 Difference]: Finished difference Result 557 states and 823 transitions. [2022-11-19 08:33:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 37 [2022-11-19 08:33:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:58,726 INFO L225 Difference]: With dead ends: 557 [2022-11-19 08:33:58,727 INFO L226 Difference]: Without dead ends: 402 [2022-11-19 08:33:58,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:33:58,735 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 537 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:58,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 558 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:33:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-19 08:33:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 391. [2022-11-19 08:33:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 277 states have (on average 1.3754512635379061) internal successors, (381), 284 states have internal predecessors, (381), 75 states have call successors, (75), 38 states have call predecessors, (75), 37 states have return successors, (95), 70 states have call predecessors, (95), 73 states have call successors, (95) [2022-11-19 08:33:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 551 transitions. [2022-11-19 08:33:58,864 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 551 transitions. Word has length 37 [2022-11-19 08:33:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:58,864 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 551 transitions. [2022-11-19 08:33:58,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 08:33:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 551 transitions. [2022-11-19 08:33:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:33:58,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:58,868 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 08:33:58,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:33:58,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1888016936, now seen corresponding path program 1 times [2022-11-19 08:33:58,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:58,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589570354] [2022-11-19 08:33:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:58,941 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 08:33:58,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:58,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589570354] [2022-11-19 08:33:58,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589570354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:58,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:58,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:33:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325280540] [2022-11-19 08:33:58,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:58,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:33:58,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:58,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:33:58,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:33:58,946 INFO L87 Difference]: Start difference. First operand 391 states and 551 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 08:33:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:59,254 INFO L93 Difference]: Finished difference Result 515 states and 713 transitions. [2022-11-19 08:33:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:33:59,255 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 08:33:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:59,266 INFO L225 Difference]: With dead ends: 515 [2022-11-19 08:33:59,266 INFO L226 Difference]: Without dead ends: 451 [2022-11-19 08:33:59,272 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 08:33:59,273 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 253 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:59,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 362 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:33:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-19 08:33:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 444. [2022-11-19 08:33:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 315 states have (on average 1.3587301587301588) internal successors, (428), 322 states have internal predecessors, (428), 83 states have call successors, (83), 45 states have call predecessors, (83), 44 states have return successors, (103), 78 states have call predecessors, (103), 81 states have call successors, (103) [2022-11-19 08:33:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 614 transitions. [2022-11-19 08:33:59,372 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 614 transitions. Word has length 45 [2022-11-19 08:33:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:59,372 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 614 transitions. [2022-11-19 08:33:59,373 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 08:33:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 614 transitions. [2022-11-19 08:33:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:33:59,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:59,383 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 08:33:59,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:33:59,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1487975737, now seen corresponding path program 1 times [2022-11-19 08:33:59,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:59,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124738143] [2022-11-19 08:33:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:59,566 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 08:33:59,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:59,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124738143] [2022-11-19 08:33:59,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124738143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:59,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:59,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:33:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171815364] [2022-11-19 08:33:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:33:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:33:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:59,571 INFO L87 Difference]: Start difference. First operand 444 states and 614 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:34:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:00,236 INFO L93 Difference]: Finished difference Result 846 states and 1117 transitions. [2022-11-19 08:34:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:34:00,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 08:34:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:00,243 INFO L225 Difference]: With dead ends: 846 [2022-11-19 08:34:00,243 INFO L226 Difference]: Without dead ends: 714 [2022-11-19 08:34:00,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:34:00,253 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 588 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:00,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 738 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:34:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-19 08:34:00,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 630. [2022-11-19 08:34:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 447 states have (on average 1.3154362416107384) internal successors, (588), 455 states have internal predecessors, (588), 110 states have call successors, (110), 68 states have call predecessors, (110), 71 states have return successors, (134), 108 states have call predecessors, (134), 108 states have call successors, (134) [2022-11-19 08:34:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 832 transitions. [2022-11-19 08:34:00,348 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 832 transitions. Word has length 45 [2022-11-19 08:34:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:00,348 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 832 transitions. [2022-11-19 08:34:00,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:34:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 832 transitions. [2022-11-19 08:34:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:34:00,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:00,351 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 08:34:00,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:34:00,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:00,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1899068679, now seen corresponding path program 1 times [2022-11-19 08:34:00,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:00,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399481856] [2022-11-19 08:34:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:00,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:00,620 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 08:34:00,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:00,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399481856] [2022-11-19 08:34:00,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399481856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:00,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:00,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:34:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58933015] [2022-11-19 08:34:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:00,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:34:00,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:34:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:34:00,623 INFO L87 Difference]: Start difference. First operand 630 states and 832 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 08:34:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:01,314 INFO L93 Difference]: Finished difference Result 1146 states and 1448 transitions. [2022-11-19 08:34:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:34:01,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 46 [2022-11-19 08:34:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:01,327 INFO L225 Difference]: With dead ends: 1146 [2022-11-19 08:34:01,327 INFO L226 Difference]: Without dead ends: 844 [2022-11-19 08:34:01,329 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 08:34:01,330 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 304 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:01,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 592 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:34:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-11-19 08:34:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 809. [2022-11-19 08:34:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 572 states have (on average 1.2937062937062938) internal successors, (740), 581 states have internal predecessors, (740), 137 states have call successors, (137), 91 states have call predecessors, (137), 98 states have return successors, (165), 138 states have call predecessors, (165), 135 states have call successors, (165) [2022-11-19 08:34:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1042 transitions. [2022-11-19 08:34:01,437 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1042 transitions. Word has length 46 [2022-11-19 08:34:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:01,438 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1042 transitions. [2022-11-19 08:34:01,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 08:34:01,438 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1042 transitions. [2022-11-19 08:34:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:34:01,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:01,440 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 08:34:01,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:34:01,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:01,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:01,441 INFO L85 PathProgramCache]: Analyzing trace with hash -575147253, now seen corresponding path program 1 times [2022-11-19 08:34:01,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:01,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922314454] [2022-11-19 08:34:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:01,488 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 08:34:01,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:01,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922314454] [2022-11-19 08:34:01,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922314454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:01,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:01,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:01,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160285689] [2022-11-19 08:34:01,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:01,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:01,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:01,492 INFO L87 Difference]: Start difference. First operand 809 states and 1042 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 08:34:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:01,691 INFO L93 Difference]: Finished difference Result 1373 states and 1712 transitions. [2022-11-19 08:34:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:01,692 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 08:34:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:01,697 INFO L225 Difference]: With dead ends: 1373 [2022-11-19 08:34:01,697 INFO L226 Difference]: Without dead ends: 941 [2022-11-19 08:34:01,698 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 08:34:01,699 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 67 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:01,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 320 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-11-19 08:34:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 836. [2022-11-19 08:34:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 595 states have (on average 1.2857142857142858) internal successors, (765), 604 states have internal predecessors, (765), 139 states have call successors, (139), 93 states have call predecessors, (139), 100 states have return successors, (167), 140 states have call predecessors, (167), 137 states have call successors, (167) [2022-11-19 08:34:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1071 transitions. [2022-11-19 08:34:01,819 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1071 transitions. Word has length 47 [2022-11-19 08:34:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:01,819 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 1071 transitions. [2022-11-19 08:34:01,820 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 08:34:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1071 transitions. [2022-11-19 08:34:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 08:34:01,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:01,821 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] [2022-11-19 08:34:01,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:34:01,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1970670378, now seen corresponding path program 1 times [2022-11-19 08:34:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:01,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858742012] [2022-11-19 08:34:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:34:01,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:01,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858742012] [2022-11-19 08:34:01,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858742012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:01,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:01,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:01,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356189912] [2022-11-19 08:34:01,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:01,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:01,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:01,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:01,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:01,869 INFO L87 Difference]: Start difference. First operand 836 states and 1071 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 08:34:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:02,013 INFO L93 Difference]: Finished difference Result 1026 states and 1292 transitions. [2022-11-19 08:34:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 53 [2022-11-19 08:34:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:02,018 INFO L225 Difference]: With dead ends: 1026 [2022-11-19 08:34:02,018 INFO L226 Difference]: Without dead ends: 753 [2022-11-19 08:34:02,019 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 08:34:02,020 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 166 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:02,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 238 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-19 08:34:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 644. [2022-11-19 08:34:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 455 states have (on average 1.2813186813186814) internal successors, (583), 462 states have internal predecessors, (583), 115 states have call successors, (115), 73 states have call predecessors, (115), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2022-11-19 08:34:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 833 transitions. [2022-11-19 08:34:02,114 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 833 transitions. Word has length 53 [2022-11-19 08:34:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:02,115 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 833 transitions. [2022-11-19 08:34:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 08:34:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 833 transitions. [2022-11-19 08:34:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:34:02,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:02,117 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 08:34:02,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:34:02,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:02,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1104131365, now seen corresponding path program 1 times [2022-11-19 08:34:02,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:02,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503714069] [2022-11-19 08:34:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:02,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:02,198 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 08:34:02,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:02,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503714069] [2022-11-19 08:34:02,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503714069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:02,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:02,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138355169] [2022-11-19 08:34:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:02,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:02,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:02,201 INFO L87 Difference]: Start difference. First operand 644 states and 833 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 08:34:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:02,472 INFO L93 Difference]: Finished difference Result 747 states and 949 transitions. [2022-11-19 08:34:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:02,473 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 08:34:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:02,477 INFO L225 Difference]: With dead ends: 747 [2022-11-19 08:34:02,478 INFO L226 Difference]: Without dead ends: 744 [2022-11-19 08:34:02,478 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 08:34:02,479 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 309 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:02,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 214 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:34:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-19 08:34:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 643. [2022-11-19 08:34:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 455 states have (on average 1.2747252747252746) internal successors, (580), 461 states have internal predecessors, (580), 114 states have call successors, (114), 73 states have call predecessors, (114), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2022-11-19 08:34:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 829 transitions. [2022-11-19 08:34:02,594 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 829 transitions. Word has length 54 [2022-11-19 08:34:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:02,595 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 829 transitions. [2022-11-19 08:34:02,596 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 08:34:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 829 transitions. [2022-11-19 08:34:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 08:34:02,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:02,600 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 08:34:02,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:34:02,600 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash -132366092, now seen corresponding path program 1 times [2022-11-19 08:34:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:02,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424687037] [2022-11-19 08:34:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:02,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:02,813 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 08:34:02,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:02,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424687037] [2022-11-19 08:34:02,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424687037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:02,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216534314] [2022-11-19 08:34:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:02,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:02,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:02,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:02,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:34:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:02,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:34:02,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:03,375 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 08:34:03,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:03,639 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 08:34:03,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216534314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:03,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422043849] [2022-11-19 08:34:03,663 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:34:03,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:03,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:03,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:03,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:06,297 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 105 for LOIs [2022-11-19 08:34:06,322 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 73 for LOIs [2022-11-19 08:34:06,333 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 101 for LOIs [2022-11-19 08:34:06,367 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 109 for LOIs [2022-11-19 08:34:06,727 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 105 for LOIs [2022-11-19 08:34:06,768 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 105 for LOIs [2022-11-19 08:34:06,809 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 105 for LOIs [2022-11-19 08:34:06,828 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 112 for LOIs [2022-11-19 08:34:06,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:17,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16230#(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) (= ~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) (= ~local~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) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:17,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:17,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:17,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 08:34:17,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625180708] [2022-11-19 08:34:17,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:17,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:34:17,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:34:17,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:34:17,146 INFO L87 Difference]: Start difference. First operand 643 states and 829 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 08:34:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:17,725 INFO L93 Difference]: Finished difference Result 1216 states and 1484 transitions. [2022-11-19 08:34:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:34:17,726 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 08:34:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:17,732 INFO L225 Difference]: With dead ends: 1216 [2022-11-19 08:34:17,732 INFO L226 Difference]: Without dead ends: 1213 [2022-11-19 08:34:17,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:34:17,735 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 557 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:17,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 642 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:34:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-11-19 08:34:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 938. [2022-11-19 08:34:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 660 states have (on average 1.246969696969697) internal successors, (823), 666 states have internal predecessors, (823), 162 states have call successors, (162), 115 states have call predecessors, (162), 114 states have return successors, (183), 158 states have call predecessors, (183), 161 states have call successors, (183) [2022-11-19 08:34:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1168 transitions. [2022-11-19 08:34:17,860 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1168 transitions. Word has length 55 [2022-11-19 08:34:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:17,861 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1168 transitions. [2022-11-19 08:34:17,861 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 08:34:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1168 transitions. [2022-11-19 08:34:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 08:34:17,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:17,863 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 08:34:17,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:18,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:18,079 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:18,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1431704731, now seen corresponding path program 2 times [2022-11-19 08:34:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:18,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925599627] [2022-11-19 08:34:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:18,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:18,136 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 08:34:18,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:18,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925599627] [2022-11-19 08:34:18,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925599627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:18,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:18,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985597918] [2022-11-19 08:34:18,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:18,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:18,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:18,139 INFO L87 Difference]: Start difference. First operand 938 states and 1168 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 08:34:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:18,324 INFO L93 Difference]: Finished difference Result 1351 states and 1641 transitions. [2022-11-19 08:34:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:18,325 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 08:34:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:18,333 INFO L225 Difference]: With dead ends: 1351 [2022-11-19 08:34:18,334 INFO L226 Difference]: Without dead ends: 940 [2022-11-19 08:34:18,335 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 08:34:18,336 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 169 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 271 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 08:34:18,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 271 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-11-19 08:34:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 934. [2022-11-19 08:34:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 656 states have (on average 1.236280487804878) internal successors, (811), 662 states have internal predecessors, (811), 162 states have call successors, (162), 115 states have call predecessors, (162), 114 states have return successors, (183), 158 states have call predecessors, (183), 161 states have call successors, (183) [2022-11-19 08:34:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1156 transitions. [2022-11-19 08:34:18,465 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1156 transitions. Word has length 58 [2022-11-19 08:34:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:18,465 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1156 transitions. [2022-11-19 08:34:18,465 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 08:34:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1156 transitions. [2022-11-19 08:34:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:34:18,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:18,467 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 08:34:18,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:34:18,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash -921541998, now seen corresponding path program 1 times [2022-11-19 08:34:18,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:18,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814691099] [2022-11-19 08:34:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:18,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:18,514 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 08:34:18,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:18,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814691099] [2022-11-19 08:34:18,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814691099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:18,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:18,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:18,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371787931] [2022-11-19 08:34:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:18,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:18,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:18,517 INFO L87 Difference]: Start difference. First operand 934 states and 1156 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 08:34:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:18,732 INFO L93 Difference]: Finished difference Result 1553 states and 1866 transitions. [2022-11-19 08:34:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:18,733 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 08:34:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:18,739 INFO L225 Difference]: With dead ends: 1553 [2022-11-19 08:34:18,739 INFO L226 Difference]: Without dead ends: 1190 [2022-11-19 08:34:18,741 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 08:34:18,742 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 42 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 356 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 08:34:18,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 356 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-19 08:34:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1009. [2022-11-19 08:34:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 717 states have (on average 1.2357043235704324) internal successors, (886), 723 states have internal predecessors, (886), 169 states have call successors, (169), 122 states have call predecessors, (169), 121 states have return successors, (190), 165 states have call predecessors, (190), 168 states have call successors, (190) [2022-11-19 08:34:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1245 transitions. [2022-11-19 08:34:18,910 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1245 transitions. Word has length 61 [2022-11-19 08:34:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:18,910 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1245 transitions. [2022-11-19 08:34:18,910 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 08:34:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1245 transitions. [2022-11-19 08:34:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 08:34:18,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:18,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:18,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:34:18,913 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:18,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1333162197, now seen corresponding path program 1 times [2022-11-19 08:34:18,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:18,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962184175] [2022-11-19 08:34:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:18,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:34:19,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:19,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962184175] [2022-11-19 08:34:19,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962184175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:19,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:19,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:34:19,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670213785] [2022-11-19 08:34:19,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:19,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:34:19,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:19,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:34:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:19,169 INFO L87 Difference]: Start difference. First operand 1009 states and 1245 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 08:34:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:19,781 INFO L93 Difference]: Finished difference Result 1641 states and 2183 transitions. [2022-11-19 08:34:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:34:19,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 66 [2022-11-19 08:34:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:19,789 INFO L225 Difference]: With dead ends: 1641 [2022-11-19 08:34:19,789 INFO L226 Difference]: Without dead ends: 1325 [2022-11-19 08:34:19,791 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 08:34:19,791 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 303 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:19,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 447 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:34:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-11-19 08:34:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1293. [2022-11-19 08:34:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 919 states have (on average 1.2557127312295975) internal successors, (1154), 928 states have internal predecessors, (1154), 221 states have call successors, (221), 152 states have call predecessors, (221), 151 states have return successors, (260), 214 states have call predecessors, (260), 220 states have call successors, (260) [2022-11-19 08:34:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1635 transitions. [2022-11-19 08:34:19,975 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1635 transitions. Word has length 66 [2022-11-19 08:34:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:19,975 INFO L495 AbstractCegarLoop]: Abstraction has 1293 states and 1635 transitions. [2022-11-19 08:34:19,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 08:34:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1635 transitions. [2022-11-19 08:34:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:34:19,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:19,978 INFO L195 NwaCegarLoop]: trace histogram [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 08:34:19,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:34:19,979 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1507808166, now seen corresponding path program 1 times [2022-11-19 08:34:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:19,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652552687] [2022-11-19 08:34:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:34:20,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:20,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652552687] [2022-11-19 08:34:20,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652552687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:20,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:20,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:20,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590418319] [2022-11-19 08:34:20,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:20,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:20,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:20,040 INFO L87 Difference]: Start difference. First operand 1293 states and 1635 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 08:34:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:20,306 INFO L93 Difference]: Finished difference Result 1912 states and 2534 transitions. [2022-11-19 08:34:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:20,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 67 [2022-11-19 08:34:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:20,314 INFO L225 Difference]: With dead ends: 1912 [2022-11-19 08:34:20,314 INFO L226 Difference]: Without dead ends: 1430 [2022-11-19 08:34:20,316 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 08:34:20,317 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 37 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 361 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 08:34:20,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 361 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:20,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-11-19 08:34:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1351. [2022-11-19 08:34:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 969 states have (on average 1.2714138286893706) internal successors, (1232), 978 states have internal predecessors, (1232), 225 states have call successors, (225), 156 states have call predecessors, (225), 155 states have return successors, (264), 218 states have call predecessors, (264), 224 states have call successors, (264) [2022-11-19 08:34:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1721 transitions. [2022-11-19 08:34:20,518 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1721 transitions. Word has length 67 [2022-11-19 08:34:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:20,519 INFO L495 AbstractCegarLoop]: Abstraction has 1351 states and 1721 transitions. [2022-11-19 08:34:20,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 08:34:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1721 transitions. [2022-11-19 08:34:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 08:34:20,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:20,521 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 08:34:20,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:34:20,522 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:20,523 INFO L85 PathProgramCache]: Analyzing trace with hash -923777638, now seen corresponding path program 1 times [2022-11-19 08:34:20,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:20,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677461161] [2022-11-19 08:34:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:20,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:20,717 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 08:34:20,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677461161] [2022-11-19 08:34:20,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677461161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:20,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:20,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:34:20,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186854605] [2022-11-19 08:34:20,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:20,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:34:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:34:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:34:20,720 INFO L87 Difference]: Start difference. First operand 1351 states and 1721 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 08:34:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:21,658 INFO L93 Difference]: Finished difference Result 2400 states and 2904 transitions. [2022-11-19 08:34:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:34:21,658 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 08:34:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:21,667 INFO L225 Difference]: With dead ends: 2400 [2022-11-19 08:34:21,667 INFO L226 Difference]: Without dead ends: 1719 [2022-11-19 08:34:21,669 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 08:34:21,671 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 286 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:21,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 574 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:34:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-19 08:34:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1670. [2022-11-19 08:34:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1183 states have (on average 1.2409129332206255) internal successors, (1468), 1192 states have internal predecessors, (1468), 281 states have call successors, (281), 205 states have call predecessors, (281), 204 states have return successors, (320), 274 states have call predecessors, (320), 280 states have call successors, (320) [2022-11-19 08:34:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2069 transitions. [2022-11-19 08:34:21,986 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2069 transitions. Word has length 70 [2022-11-19 08:34:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:21,986 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2069 transitions. [2022-11-19 08:34:21,987 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 08:34:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2069 transitions. [2022-11-19 08:34:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 08:34:21,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:21,989 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 08:34:21,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:34:21,990 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:21,990 INFO L85 PathProgramCache]: Analyzing trace with hash -412529439, now seen corresponding path program 1 times [2022-11-19 08:34:21,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:21,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908262133] [2022-11-19 08:34:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:21,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:22,049 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 08:34:22,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908262133] [2022-11-19 08:34:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908262133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:22,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:22,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:22,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314931024] [2022-11-19 08:34:22,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:22,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:22,052 INFO L87 Difference]: Start difference. First operand 1670 states and 2069 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 08:34:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:22,390 INFO L93 Difference]: Finished difference Result 2636 states and 3163 transitions. [2022-11-19 08:34:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:22,391 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 08:34:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:22,399 INFO L225 Difference]: With dead ends: 2636 [2022-11-19 08:34:22,400 INFO L226 Difference]: Without dead ends: 1846 [2022-11-19 08:34:22,402 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 08:34:22,404 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 37 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:22,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 350 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-11-19 08:34:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1717. [2022-11-19 08:34:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1222 states have (on average 1.2389525368248773) internal successors, (1514), 1231 states have internal predecessors, (1514), 285 states have call successors, (285), 209 states have call predecessors, (285), 208 states have return successors, (324), 278 states have call predecessors, (324), 284 states have call successors, (324) [2022-11-19 08:34:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2123 transitions. [2022-11-19 08:34:22,725 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2123 transitions. Word has length 71 [2022-11-19 08:34:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:22,726 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2123 transitions. [2022-11-19 08:34:22,726 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 08:34:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2123 transitions. [2022-11-19 08:34:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 08:34:22,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:22,730 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:34:22,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:34:22,730 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash -819604455, now seen corresponding path program 1 times [2022-11-19 08:34:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:22,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677786245] [2022-11-19 08:34:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:34:22,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:22,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677786245] [2022-11-19 08:34:22,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677786245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:22,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:22,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:22,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126995309] [2022-11-19 08:34:22,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:22,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:22,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:22,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:22,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:22,794 INFO L87 Difference]: Start difference. First operand 1717 states and 2123 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 08:34:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:23,168 INFO L93 Difference]: Finished difference Result 2703 states and 3543 transitions. [2022-11-19 08:34:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:23,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 86 [2022-11-19 08:34:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:23,177 INFO L225 Difference]: With dead ends: 2703 [2022-11-19 08:34:23,178 INFO L226 Difference]: Without dead ends: 2044 [2022-11-19 08:34:23,181 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 08:34:23,181 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 160 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:23,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 265 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2022-11-19 08:34:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2035. [2022-11-19 08:34:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1454 states have (on average 1.251031636863824) internal successors, (1819), 1466 states have internal predecessors, (1819), 339 states have call successors, (339), 241 states have call predecessors, (339), 240 states have return successors, (396), 329 states have call predecessors, (396), 338 states have call successors, (396) [2022-11-19 08:34:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 2554 transitions. [2022-11-19 08:34:23,606 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 2554 transitions. Word has length 86 [2022-11-19 08:34:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:23,606 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 2554 transitions. [2022-11-19 08:34:23,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 08:34:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 2554 transitions. [2022-11-19 08:34:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:34:23,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:23,612 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 08:34:23,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:34:23,613 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1348630585, now seen corresponding path program 1 times [2022-11-19 08:34:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:23,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216198159] [2022-11-19 08:34:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:24,005 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 08:34:24,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216198159] [2022-11-19 08:34:24,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216198159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308193941] [2022-11-19 08:34:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:24,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:24,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:24,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:24,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:34:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:34:24,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:24,230 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 08:34:24,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:24,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308193941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:24,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:24,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 08:34:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916195424] [2022-11-19 08:34:24,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:34:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:34:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:34:24,233 INFO L87 Difference]: Start difference. First operand 2035 states and 2554 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 08:34:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:24,740 INFO L93 Difference]: Finished difference Result 2899 states and 3559 transitions. [2022-11-19 08:34:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:34:24,741 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 08:34:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:24,750 INFO L225 Difference]: With dead ends: 2899 [2022-11-19 08:34:24,751 INFO L226 Difference]: Without dead ends: 1852 [2022-11-19 08:34:24,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:34:24,755 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 164 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:24,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 765 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:34:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-19 08:34:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1667. [2022-11-19 08:34:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1217 states have (on average 1.2728019720624486) internal successors, (1549), 1229 states have internal predecessors, (1549), 268 states have call successors, (268), 181 states have call predecessors, (268), 180 states have return successors, (325), 258 states have call predecessors, (325), 267 states have call successors, (325) [2022-11-19 08:34:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2142 transitions. [2022-11-19 08:34:25,018 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2142 transitions. Word has length 102 [2022-11-19 08:34:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:25,019 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 2142 transitions. [2022-11-19 08:34:25,019 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 08:34:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2142 transitions. [2022-11-19 08:34:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 08:34:25,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:25,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:34:25,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:25,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:34:25,243 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:25,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1575000988, now seen corresponding path program 1 times [2022-11-19 08:34:25,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:25,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174926644] [2022-11-19 08:34:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:25,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:34:25,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:25,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174926644] [2022-11-19 08:34:25,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174926644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:25,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978736941] [2022-11-19 08:34:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:25,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:25,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:25,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:25,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:34:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:25,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:34:25,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:34:25,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:25,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978736941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:25,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:25,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:34:25,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333556529] [2022-11-19 08:34:25,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:25,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:25,525 INFO L87 Difference]: Start difference. First operand 1667 states and 2142 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 08:34:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:25,833 INFO L93 Difference]: Finished difference Result 2550 states and 3401 transitions. [2022-11-19 08:34:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 98 [2022-11-19 08:34:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:25,843 INFO L225 Difference]: With dead ends: 2550 [2022-11-19 08:34:25,843 INFO L226 Difference]: Without dead ends: 1892 [2022-11-19 08:34:25,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 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 08:34:25,847 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 51 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 369 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 08:34:25,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 369 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2022-11-19 08:34:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1757. [2022-11-19 08:34:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1293 states have (on average 1.2892498066511988) internal successors, (1667), 1305 states have internal predecessors, (1667), 275 states have call successors, (275), 188 states have call predecessors, (275), 187 states have return successors, (332), 265 states have call predecessors, (332), 274 states have call successors, (332) [2022-11-19 08:34:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2274 transitions. [2022-11-19 08:34:26,138 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2274 transitions. Word has length 98 [2022-11-19 08:34:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:26,138 INFO L495 AbstractCegarLoop]: Abstraction has 1757 states and 2274 transitions. [2022-11-19 08:34:26,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 08:34:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2274 transitions. [2022-11-19 08:34:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 08:34:26,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:26,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:34:26,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:26,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:34:26,351 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash 888908188, now seen corresponding path program 2 times [2022-11-19 08:34:26,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963109041] [2022-11-19 08:34:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:34:26,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:26,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963109041] [2022-11-19 08:34:26,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963109041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:26,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280722446] [2022-11-19 08:34:26,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:34:26,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:26,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:26,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:34:26,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:34:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:26,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:34:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:34:26,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:26,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280722446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:26,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:26,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:34:26,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878701354] [2022-11-19 08:34:26,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:26,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:26,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:34:26,712 INFO L87 Difference]: Start difference. First operand 1757 states and 2274 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 08:34:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:27,012 INFO L93 Difference]: Finished difference Result 2512 states and 3427 transitions. [2022-11-19 08:34:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 98 [2022-11-19 08:34:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:27,020 INFO L225 Difference]: With dead ends: 2512 [2022-11-19 08:34:27,020 INFO L226 Difference]: Without dead ends: 1764 [2022-11-19 08:34:27,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 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 08:34:27,024 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 82 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:27,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 362 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-11-19 08:34:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1753. [2022-11-19 08:34:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1289 states have (on average 1.2715283165244375) internal successors, (1639), 1301 states have internal predecessors, (1639), 275 states have call successors, (275), 188 states have call predecessors, (275), 187 states have return successors, (332), 265 states have call predecessors, (332), 274 states have call successors, (332) [2022-11-19 08:34:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2246 transitions. [2022-11-19 08:34:27,355 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2246 transitions. Word has length 98 [2022-11-19 08:34:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:27,356 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2246 transitions. [2022-11-19 08:34:27,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 08:34:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2246 transitions. [2022-11-19 08:34:27,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 08:34:27,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:27,362 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:34:27,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 08:34:27,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:34:27,568 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1911878498, now seen corresponding path program 1 times [2022-11-19 08:34:27,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:27,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318299776] [2022-11-19 08:34:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:27,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:34:27,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:27,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318299776] [2022-11-19 08:34:27,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318299776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151251031] [2022-11-19 08:34:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:27,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:27,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:27,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:34:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:34:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:34:27,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:27,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151251031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:27,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:27,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:34:27,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238023962] [2022-11-19 08:34:27,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:27,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:27,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:27,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:34:27,978 INFO L87 Difference]: Start difference. First operand 1753 states and 2246 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 08:34:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:28,344 INFO L93 Difference]: Finished difference Result 3306 states and 4398 transitions. [2022-11-19 08:34:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:28,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 98 [2022-11-19 08:34:28,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:28,354 INFO L225 Difference]: With dead ends: 3306 [2022-11-19 08:34:28,355 INFO L226 Difference]: Without dead ends: 2244 [2022-11-19 08:34:28,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 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 08:34:28,358 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 41 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:28,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 331 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-11-19 08:34:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1913. [2022-11-19 08:34:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1421 states have (on average 1.2864180154820548) internal successors, (1828), 1434 states have internal predecessors, (1828), 289 states have call successors, (289), 202 states have call predecessors, (289), 201 states have return successors, (346), 278 states have call predecessors, (346), 288 states have call successors, (346) [2022-11-19 08:34:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2463 transitions. [2022-11-19 08:34:28,588 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2463 transitions. Word has length 98 [2022-11-19 08:34:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:28,589 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 2463 transitions. [2022-11-19 08:34:28,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 08:34:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2463 transitions. [2022-11-19 08:34:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 08:34:28,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:28,595 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:34:28,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:28,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:28,807 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1146711925, now seen corresponding path program 1 times [2022-11-19 08:34:28,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:28,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892695367] [2022-11-19 08:34:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:28,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:34:28,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892695367] [2022-11-19 08:34:28,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892695367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826699939] [2022-11-19 08:34:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:28,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:28,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:29,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:34:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:29,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:34:29,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:34:29,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:29,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826699939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:29,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:29,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-11-19 08:34:29,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632730183] [2022-11-19 08:34:29,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:29,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:34:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:29,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:34:29,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:29,183 INFO L87 Difference]: Start difference. First operand 1913 states and 2463 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 08:34:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:29,899 INFO L93 Difference]: Finished difference Result 3785 states and 5009 transitions. [2022-11-19 08:34:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:34:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 99 [2022-11-19 08:34:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:29,911 INFO L225 Difference]: With dead ends: 3785 [2022-11-19 08:34:29,911 INFO L226 Difference]: Without dead ends: 2563 [2022-11-19 08:34:29,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:34:29,915 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 312 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:29,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 366 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:34:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2022-11-19 08:34:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2561. [2022-11-19 08:34:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 1892 states have (on average 1.2684989429175475) internal successors, (2400), 1911 states have internal predecessors, (2400), 397 states have call successors, (397), 271 states have call predecessors, (397), 270 states have return successors, (493), 380 states have call predecessors, (493), 396 states have call successors, (493) [2022-11-19 08:34:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3290 transitions. [2022-11-19 08:34:30,237 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3290 transitions. Word has length 99 [2022-11-19 08:34:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:30,237 INFO L495 AbstractCegarLoop]: Abstraction has 2561 states and 3290 transitions. [2022-11-19 08:34:30,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 08:34:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3290 transitions. [2022-11-19 08:34:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:34:30,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:30,244 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, 1, 1, 1, 1, 1] [2022-11-19 08:34:30,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:30,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:30,445 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:30,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1210134155, now seen corresponding path program 1 times [2022-11-19 08:34:30,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:30,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661095616] [2022-11-19 08:34:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:30,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:34:30,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:30,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661095616] [2022-11-19 08:34:30,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661095616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:30,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:30,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:30,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986248209] [2022-11-19 08:34:30,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:30,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:30,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:30,525 INFO L87 Difference]: Start difference. First operand 2561 states and 3290 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:34:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:31,105 INFO L93 Difference]: Finished difference Result 4284 states and 5687 transitions. [2022-11-19 08:34:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:31,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2022-11-19 08:34:31,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:31,134 INFO L225 Difference]: With dead ends: 4284 [2022-11-19 08:34:31,134 INFO L226 Difference]: Without dead ends: 2902 [2022-11-19 08:34:31,139 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 08:34:31,140 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 193 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:31,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 292 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2022-11-19 08:34:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2846. [2022-11-19 08:34:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2846 states, 2139 states have (on average 1.2538569424964936) internal successors, (2682), 2155 states have internal predecessors, (2682), 403 states have call successors, (403), 301 states have call predecessors, (403), 302 states have return successors, (498), 391 states have call predecessors, (498), 402 states have call successors, (498) [2022-11-19 08:34:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 3583 transitions. [2022-11-19 08:34:31,752 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 3583 transitions. Word has length 102 [2022-11-19 08:34:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:31,752 INFO L495 AbstractCegarLoop]: Abstraction has 2846 states and 3583 transitions. [2022-11-19 08:34:31,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:34:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 3583 transitions. [2022-11-19 08:34:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:34:31,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:31,758 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, 1, 1, 1, 1, 1] [2022-11-19 08:34:31,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 08:34:31,759 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:31,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1990115084, now seen corresponding path program 2 times [2022-11-19 08:34:31,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:31,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108599853] [2022-11-19 08:34:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:31,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:34:31,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:31,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108599853] [2022-11-19 08:34:31,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108599853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:31,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:31,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:31,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187119574] [2022-11-19 08:34:31,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:31,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:31,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:31,821 INFO L87 Difference]: Start difference. First operand 2846 states and 3583 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:34:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:32,452 INFO L93 Difference]: Finished difference Result 4835 states and 6323 transitions. [2022-11-19 08:34:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 102 [2022-11-19 08:34:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:32,464 INFO L225 Difference]: With dead ends: 4835 [2022-11-19 08:34:32,464 INFO L226 Difference]: Without dead ends: 3247 [2022-11-19 08:34:32,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:32,470 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 247 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:32,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 371 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:34:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-11-19 08:34:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2618. [2022-11-19 08:34:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 1965 states have (on average 1.2183206106870228) internal successors, (2394), 1981 states have internal predecessors, (2394), 372 states have call successors, (372), 280 states have call predecessors, (372), 279 states have return successors, (418), 358 states have call predecessors, (418), 371 states have call successors, (418) [2022-11-19 08:34:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3184 transitions. [2022-11-19 08:34:32,852 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3184 transitions. Word has length 102 [2022-11-19 08:34:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:32,852 INFO L495 AbstractCegarLoop]: Abstraction has 2618 states and 3184 transitions. [2022-11-19 08:34:32,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:34:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3184 transitions. [2022-11-19 08:34:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-19 08:34:32,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:32,860 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, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:32,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 08:34:32,860 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1457570784, now seen corresponding path program 1 times [2022-11-19 08:34:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:32,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068531282] [2022-11-19 08:34:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:32,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:34:32,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068531282] [2022-11-19 08:34:32,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068531282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054474716] [2022-11-19 08:34:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:32,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:32,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:32,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:33,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:34:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:34:33,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:34:33,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:33,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054474716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:33,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:33,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-19 08:34:33,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496819504] [2022-11-19 08:34:33,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:33,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:33,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:33,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:33,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:33,185 INFO L87 Difference]: Start difference. First operand 2618 states and 3184 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 08:34:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:33,697 INFO L93 Difference]: Finished difference Result 3781 states and 4631 transitions. [2022-11-19 08:34:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 103 [2022-11-19 08:34:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:33,705 INFO L225 Difference]: With dead ends: 3781 [2022-11-19 08:34:33,706 INFO L226 Difference]: Without dead ends: 2687 [2022-11-19 08:34:33,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 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 08:34:33,710 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 171 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:33,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 511 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2022-11-19 08:34:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2529. [2022-11-19 08:34:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 1889 states have (on average 1.216516675489677) internal successors, (2298), 1902 states have internal predecessors, (2298), 367 states have call successors, (367), 272 states have call predecessors, (367), 271 states have return successors, (407), 356 states have call predecessors, (407), 366 states have call successors, (407) [2022-11-19 08:34:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 3072 transitions. [2022-11-19 08:34:34,093 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 3072 transitions. Word has length 103 [2022-11-19 08:34:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:34,094 INFO L495 AbstractCegarLoop]: Abstraction has 2529 states and 3072 transitions. [2022-11-19 08:34:34,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 08:34:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 3072 transitions. [2022-11-19 08:34:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-19 08:34:34,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:34,100 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-11-19 08:34:34,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 08:34:34,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 08:34:34,312 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:34,312 INFO L85 PathProgramCache]: Analyzing trace with hash -148940730, now seen corresponding path program 1 times [2022-11-19 08:34:34,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:34,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524764272] [2022-11-19 08:34:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:34,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:34:34,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:34,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524764272] [2022-11-19 08:34:34,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524764272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:34,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000029502] [2022-11-19 08:34:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:34,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:34,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:34,443 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:34,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:34:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:34:34,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:34:34,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:34,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000029502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:34,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:34,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 08:34:34,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076286834] [2022-11-19 08:34:34,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:34,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:34,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:34,651 INFO L87 Difference]: Start difference. First operand 2529 states and 3072 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 08:34:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:35,069 INFO L93 Difference]: Finished difference Result 4089 states and 5078 transitions. [2022-11-19 08:34:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 104 [2022-11-19 08:34:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:35,103 INFO L225 Difference]: With dead ends: 4089 [2022-11-19 08:34:35,103 INFO L226 Difference]: Without dead ends: 2834 [2022-11-19 08:34:35,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 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 08:34:35,107 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 151 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:35,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 204 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:34:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-11-19 08:34:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2798. [2022-11-19 08:34:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2132 states have (on average 1.1955909943714822) internal successors, (2549), 2145 states have internal predecessors, (2549), 369 states have call successors, (369), 296 states have call predecessors, (369), 295 states have return successors, (439), 358 states have call predecessors, (439), 368 states have call successors, (439) [2022-11-19 08:34:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 3357 transitions. [2022-11-19 08:34:35,561 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 3357 transitions. Word has length 104 [2022-11-19 08:34:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:35,561 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 3357 transitions. [2022-11-19 08:34:35,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 08:34:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 3357 transitions. [2022-11-19 08:34:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 08:34:35,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:35,567 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:34:35,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:35,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:34:35,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 764258265, now seen corresponding path program 1 times [2022-11-19 08:34:35,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:35,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182486460] [2022-11-19 08:34:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:35,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:34:35,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:35,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182486460] [2022-11-19 08:34:35,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182486460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:35,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981854756] [2022-11-19 08:34:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:35,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:35,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:35,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:35,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:34:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:34:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:34:36,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:36,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981854756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:36,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:36,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:34:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981459264] [2022-11-19 08:34:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:36,026 INFO L87 Difference]: Start difference. First operand 2798 states and 3357 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 08:34:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:36,482 INFO L93 Difference]: Finished difference Result 4302 states and 5249 transitions. [2022-11-19 08:34:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 101 [2022-11-19 08:34:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:36,489 INFO L225 Difference]: With dead ends: 4302 [2022-11-19 08:34:36,490 INFO L226 Difference]: Without dead ends: 3176 [2022-11-19 08:34:36,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 08:34:36,493 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 42 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:36,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 363 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2022-11-19 08:34:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2966. [2022-11-19 08:34:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2268 states have (on average 1.2032627865961198) internal successors, (2729), 2281 states have internal predecessors, (2729), 385 states have call successors, (385), 312 states have call predecessors, (385), 311 states have return successors, (455), 374 states have call predecessors, (455), 384 states have call successors, (455) [2022-11-19 08:34:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 3569 transitions. [2022-11-19 08:34:36,843 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 3569 transitions. Word has length 101 [2022-11-19 08:34:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:36,844 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 3569 transitions. [2022-11-19 08:34:36,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 08:34:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 3569 transitions. [2022-11-19 08:34:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:34:36,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:36,851 INFO L195 NwaCegarLoop]: trace histogram [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 08:34:36,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:37,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 08:34:37,057 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash 821191965, now seen corresponding path program 1 times [2022-11-19 08:34:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:37,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799104024] [2022-11-19 08:34:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:37,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:34:37,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:37,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799104024] [2022-11-19 08:34:37,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799104024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:37,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128342690] [2022-11-19 08:34:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:37,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:37,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:37,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:37,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:34:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:37,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:34:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:34:37,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:37,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128342690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:37,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:37,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-19 08:34:37,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693237208] [2022-11-19 08:34:37,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:37,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:37,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:37,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:34:37,480 INFO L87 Difference]: Start difference. First operand 2966 states and 3569 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:34:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:38,230 INFO L93 Difference]: Finished difference Result 5666 states and 6888 transitions. [2022-11-19 08:34:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2022-11-19 08:34:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:38,239 INFO L225 Difference]: With dead ends: 5666 [2022-11-19 08:34:38,239 INFO L226 Difference]: Without dead ends: 3734 [2022-11-19 08:34:38,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:34:38,246 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 272 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:38,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 298 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:34:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2022-11-19 08:34:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3300. [2022-11-19 08:34:38,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 2563 states have (on average 1.187670698400312) internal successors, (3044), 2581 states have internal predecessors, (3044), 394 states have call successors, (394), 335 states have call predecessors, (394), 341 states have return successors, (471), 385 states have call predecessors, (471), 393 states have call successors, (471) [2022-11-19 08:34:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 3909 transitions. [2022-11-19 08:34:38,807 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 3909 transitions. Word has length 102 [2022-11-19 08:34:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:38,807 INFO L495 AbstractCegarLoop]: Abstraction has 3300 states and 3909 transitions. [2022-11-19 08:34:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:34:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 3909 transitions. [2022-11-19 08:34:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-19 08:34:38,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:38,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:34:38,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:39,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 08:34:39,019 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:39,019 INFO L85 PathProgramCache]: Analyzing trace with hash -868612127, now seen corresponding path program 1 times [2022-11-19 08:34:39,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:39,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188479483] [2022-11-19 08:34:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:34:39,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188479483] [2022-11-19 08:34:39,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188479483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:39,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:39,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:34:39,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624754573] [2022-11-19 08:34:39,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:39,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:39,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:39,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:39,212 INFO L87 Difference]: Start difference. First operand 3300 states and 3909 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 08:34:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:40,473 INFO L93 Difference]: Finished difference Result 7231 states and 8642 transitions. [2022-11-19 08:34:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:34:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 103 [2022-11-19 08:34:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:40,487 INFO L225 Difference]: With dead ends: 7231 [2022-11-19 08:34:40,488 INFO L226 Difference]: Without dead ends: 4100 [2022-11-19 08:34:40,495 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 08:34:40,496 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 104 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:40,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 404 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:34:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2022-11-19 08:34:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3999. [2022-11-19 08:34:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3084 states have (on average 1.177367055771725) internal successors, (3631), 3108 states have internal predecessors, (3631), 494 states have call successors, (494), 417 states have call predecessors, (494), 419 states have return successors, (600), 475 states have call predecessors, (600), 493 states have call successors, (600) [2022-11-19 08:34:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 4725 transitions. [2022-11-19 08:34:41,180 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 4725 transitions. Word has length 103 [2022-11-19 08:34:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:41,181 INFO L495 AbstractCegarLoop]: Abstraction has 3999 states and 4725 transitions. [2022-11-19 08:34:41,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 08:34:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 4725 transitions. [2022-11-19 08:34:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-19 08:34:41,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:41,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:34:41,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-19 08:34:41,188 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash -56060095, now seen corresponding path program 1 times [2022-11-19 08:34:41,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:41,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639193833] [2022-11-19 08:34:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:41,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:34:41,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:41,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639193833] [2022-11-19 08:34:41,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639193833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:41,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586710932] [2022-11-19 08:34:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:41,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:41,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:41,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:41,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:34:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:34:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:41,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:41,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586710932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:41,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:41,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 08:34:41,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570753518] [2022-11-19 08:34:41,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:41,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:34:41,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:41,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:34:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:41,614 INFO L87 Difference]: Start difference. First operand 3999 states and 4725 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 08:34:42,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:42,769 INFO L93 Difference]: Finished difference Result 7242 states and 8653 transitions. [2022-11-19 08:34:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:34:42,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 103 [2022-11-19 08:34:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:42,785 INFO L225 Difference]: With dead ends: 7242 [2022-11-19 08:34:42,785 INFO L226 Difference]: Without dead ends: 4957 [2022-11-19 08:34:42,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 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 08:34:42,792 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 189 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:42,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 568 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:34:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2022-11-19 08:34:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4747. [2022-11-19 08:34:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 3659 states have (on average 1.1705383984695272) internal successors, (4283), 3685 states have internal predecessors, (4283), 592 states have call successors, (592), 495 states have call predecessors, (592), 494 states have return successors, (749), 568 states have call predecessors, (749), 591 states have call successors, (749) [2022-11-19 08:34:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 5624 transitions. [2022-11-19 08:34:43,625 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 5624 transitions. Word has length 103 [2022-11-19 08:34:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:43,626 INFO L495 AbstractCegarLoop]: Abstraction has 4747 states and 5624 transitions. [2022-11-19 08:34:43,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 08:34:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 5624 transitions. [2022-11-19 08:34:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 08:34:43,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:43,633 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:34:43,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:43,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 08:34:43,839 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:43,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1146756190, now seen corresponding path program 1 times [2022-11-19 08:34:43,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:43,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76690196] [2022-11-19 08:34:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:34:44,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:44,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76690196] [2022-11-19 08:34:44,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76690196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:44,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432351739] [2022-11-19 08:34:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:44,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:44,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:44,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:34:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:34:44,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:34:44,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-19 08:34:44,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432351739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:44,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834939192] [2022-11-19 08:34:44,683 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-19 08:34:44,684 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:44,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:44,686 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:44,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:54,625 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 186 for LOIs [2022-11-19 08:34:57,364 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2022-11-19 08:34:57,395 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 192 for LOIs [2022-11-19 08:34:57,460 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2022-11-19 08:34:57,841 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 66 for LOIs [2022-11-19 08:34:58,669 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 216 for LOIs [2022-11-19 08:34:59,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:27,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [834939192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:27,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:35:27,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [8, 8, 6] total 60 [2022-11-19 08:35:27,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088376397] [2022-11-19 08:35:27,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:27,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 08:35:27,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 08:35:27,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 08:35:27,259 INFO L87 Difference]: Start difference. First operand 4747 states and 5624 transitions. Second operand has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 08:36:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:37,915 INFO L93 Difference]: Finished difference Result 8340 states and 9933 transitions. [2022-11-19 08:36:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-19 08:36:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 109 [2022-11-19 08:36:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:37,929 INFO L225 Difference]: With dead ends: 8340 [2022-11-19 08:36:37,929 INFO L226 Difference]: Without dead ends: 4695 [2022-11-19 08:36:37,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 263 SyntacticMatches, 17 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7965 ImplicationChecksByTransitivity, 88.9s TimeCoverageRelationStatistics Valid=1736, Invalid=19144, Unknown=0, NotChecked=0, Total=20880 [2022-11-19 08:36:37,943 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 439 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 4726 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 4903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:37,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1944 Invalid, 4903 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [177 Valid, 4726 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-19 08:36:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-11-19 08:36:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4648. [2022-11-19 08:36:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 3576 states have (on average 1.166387024608501) internal successors, (4171), 3603 states have internal predecessors, (4171), 581 states have call successors, (581), 490 states have call predecessors, (581), 489 states have return successors, (734), 556 states have call predecessors, (734), 580 states have call successors, (734) [2022-11-19 08:36:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 5486 transitions. [2022-11-19 08:36:39,046 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 5486 transitions. Word has length 109 [2022-11-19 08:36:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:39,046 INFO L495 AbstractCegarLoop]: Abstraction has 4648 states and 5486 transitions. [2022-11-19 08:36:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 08:36:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 5486 transitions. [2022-11-19 08:36:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 08:36:39,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:39,052 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 08:36:39,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 08:36:39,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 08:36:39,259 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:39,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1365738502, now seen corresponding path program 1 times [2022-11-19 08:36:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:39,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819790806] [2022-11-19 08:36:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:39,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:39,484 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 08:36:39,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:39,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819790806] [2022-11-19 08:36:39,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819790806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:39,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122469537] [2022-11-19 08:36:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:39,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:39,487 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:39,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:36:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:39,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:36:39,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:39,749 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 08:36:39,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:39,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122469537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:39,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:36:39,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 08:36:39,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74611553] [2022-11-19 08:36:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:39,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:36:39,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:39,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:36:39,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:36:39,752 INFO L87 Difference]: Start difference. First operand 4648 states and 5486 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 08:36:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:40,840 INFO L93 Difference]: Finished difference Result 5197 states and 6111 transitions. [2022-11-19 08:36:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:36:40,840 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 08:36:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:40,857 INFO L225 Difference]: With dead ends: 5197 [2022-11-19 08:36:40,857 INFO L226 Difference]: Without dead ends: 4604 [2022-11-19 08:36:40,862 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 08:36:40,863 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 67 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:40,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1106 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:36:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2022-11-19 08:36:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 4512. [2022-11-19 08:36:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 3476 states have (on average 1.166283084004603) internal successors, (4054), 3503 states have internal predecessors, (4054), 562 states have call successors, (562), 473 states have call predecessors, (562), 472 states have return successors, (715), 537 states have call predecessors, (715), 561 states have call successors, (715) [2022-11-19 08:36:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 5331 transitions. [2022-11-19 08:36:41,881 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 5331 transitions. Word has length 112 [2022-11-19 08:36:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:41,882 INFO L495 AbstractCegarLoop]: Abstraction has 4512 states and 5331 transitions. [2022-11-19 08:36:41,882 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 08:36:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 5331 transitions. [2022-11-19 08:36:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 08:36:41,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:41,886 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 08:36:41,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:42,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:42,087 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1650442011, now seen corresponding path program 1 times [2022-11-19 08:36:42,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:42,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956164284] [2022-11-19 08:36:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:42,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:42,308 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 08:36:42,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:42,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956164284] [2022-11-19 08:36:42,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956164284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740307563] [2022-11-19 08:36:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:42,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:42,310 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:42,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:36:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:36:42,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:42,556 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 08:36:42,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:42,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740307563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:42,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:36:42,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 08:36:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555429727] [2022-11-19 08:36:42,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:42,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:36:42,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:36:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:36:42,564 INFO L87 Difference]: Start difference. First operand 4512 states and 5331 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 08:36:43,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:43,641 INFO L93 Difference]: Finished difference Result 5261 states and 6176 transitions. [2022-11-19 08:36:43,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:36:43,641 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 08:36:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:43,649 INFO L225 Difference]: With dead ends: 5261 [2022-11-19 08:36:43,650 INFO L226 Difference]: Without dead ends: 4804 [2022-11-19 08:36:43,651 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 08:36:43,652 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 148 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:43,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 830 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2022-11-19 08:36:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4770. [2022-11-19 08:36:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 3638 states have (on average 1.1638262781748214) internal successors, (4234), 3671 states have internal predecessors, (4234), 610 states have call successors, (610), 515 states have call predecessors, (610), 520 states have return successors, (775), 585 states have call predecessors, (775), 609 states have call successors, (775) [2022-11-19 08:36:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 5619 transitions. [2022-11-19 08:36:44,530 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 5619 transitions. Word has length 113 [2022-11-19 08:36:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:44,530 INFO L495 AbstractCegarLoop]: Abstraction has 4770 states and 5619 transitions. [2022-11-19 08:36:44,531 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 08:36:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 5619 transitions. [2022-11-19 08:36:44,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 08:36:44,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:44,538 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:36:44,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:44,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-19 08:36:44,744 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1528013402, now seen corresponding path program 1 times [2022-11-19 08:36:44,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:44,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496807887] [2022-11-19 08:36:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:44,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 08:36:44,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:44,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496807887] [2022-11-19 08:36:44,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496807887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:44,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532315593] [2022-11-19 08:36:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:44,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:44,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:44,996 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:45,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:36:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:36:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:36:45,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-19 08:36:45,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532315593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:45,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324444782] [2022-11-19 08:36:45,565 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-19 08:36:45,566 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:45,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:45,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:45,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:52,457 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2022-11-19 08:36:58,902 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2022-11-19 08:36:58,949 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 193 for LOIs [2022-11-19 08:36:59,019 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2022-11-19 08:36:59,153 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2022-11-19 08:36:59,815 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 217 for LOIs [2022-11-19 08:37:07,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:37:23,693 WARN L233 SmtUtils]: Spent 14.16s on a formula simplification. DAG size of input: 409 DAG size of output: 325 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:49,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1324444782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:49,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:37:49,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [8, 8, 6] total 63 [2022-11-19 08:37:49,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115060946] [2022-11-19 08:37:49,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:49,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 08:37:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:37:49,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 08:37:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3506, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 08:37:49,271 INFO L87 Difference]: Start difference. First operand 4770 states and 5619 transitions. Second operand has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 08:38:21,993 WARN L233 SmtUtils]: Spent 11.48s on a formula simplification. DAG size of input: 326 DAG size of output: 310 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:55,453 WARN L233 SmtUtils]: Spent 10.60s on a formula simplification. DAG size of input: 325 DAG size of output: 307 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:21,272 INFO L93 Difference]: Finished difference Result 8325 states and 9920 transitions. [2022-11-19 08:39:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-19 08:39:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 111 [2022-11-19 08:39:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:21,282 INFO L225 Difference]: With dead ends: 8325 [2022-11-19 08:39:21,282 INFO L226 Difference]: Without dead ends: 5207 [2022-11-19 08:39:21,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 266 SyntacticMatches, 16 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10348 ImplicationChecksByTransitivity, 121.9s TimeCoverageRelationStatistics Valid=2166, Invalid=24894, Unknown=0, NotChecked=0, Total=27060 [2022-11-19 08:39:21,297 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 614 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 5823 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 2559 SdHoareTripleChecker+Invalid, 6024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 5823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:21,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 2559 Invalid, 6024 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [201 Valid, 5823 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-11-19 08:39:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2022-11-19 08:39:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 5113. [2022-11-19 08:39:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 3892 states have (on average 1.157502569373073) internal successors, (4505), 3935 states have internal predecessors, (4505), 655 states have call successors, (655), 552 states have call predecessors, (655), 564 states have return successors, (834), 627 states have call predecessors, (834), 654 states have call successors, (834) [2022-11-19 08:39:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 5994 transitions. [2022-11-19 08:39:22,179 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 5994 transitions. Word has length 111 [2022-11-19 08:39:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:22,180 INFO L495 AbstractCegarLoop]: Abstraction has 5113 states and 5994 transitions. [2022-11-19 08:39:22,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 08:39:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 5994 transitions. [2022-11-19 08:39:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 08:39:22,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:22,184 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 08:39:22,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:22,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:39:22,384 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:39:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1071958657, now seen corresponding path program 1 times [2022-11-19 08:39:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:39:22,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885868548] [2022-11-19 08:39:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:39:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:39:23,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:39:23,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885868548] [2022-11-19 08:39:23,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885868548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:39:23,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2802242] [2022-11-19 08:39:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:23,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:39:23,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:39:23,521 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:39:23,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:39:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:23,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 08:39:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:24,666 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 08:39:24,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:26,531 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 08:39:26,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2802242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267287824] [2022-11-19 08:39:26,535 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 08:39:26,535 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:39:26,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:39:26,536 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:39:26,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:39:45,909 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 184 for LOIs [2022-11-19 08:39:46,257 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 136 for LOIs [2022-11-19 08:39:46,294 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 73 for LOIs [2022-11-19 08:39:46,302 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 196 for LOIs [2022-11-19 08:39:47,418 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 124 for LOIs [2022-11-19 08:39:47,564 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 73 for LOIs [2022-11-19 08:39:47,692 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 188 for LOIs [2022-11-19 08:39:47,957 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 211 for LOIs [2022-11-19 08:39:48,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:40:18,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258465#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 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) (= ~t2_i~0 0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~E_2~0 2) (= ~local~0 0) (= ~token~0 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) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (= ~E_1~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:40:18,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:40:18,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:40:18,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 16] total 55 [2022-11-19 08:40:18,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894892203] [2022-11-19 08:40:18,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:40:18,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 08:40:18,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:40:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 08:40:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=11605, Unknown=0, NotChecked=0, Total=12432 [2022-11-19 08:40:18,933 INFO L87 Difference]: Start difference. First operand 5113 states and 5994 transitions. Second operand has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2022-11-19 08:40:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:40:49,364 INFO L93 Difference]: Finished difference Result 7731 states and 9043 transitions. [2022-11-19 08:40:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-11-19 08:40:49,365 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) Word has length 114 [2022-11-19 08:40:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:40:49,380 INFO L225 Difference]: With dead ends: 7731 [2022-11-19 08:40:49,380 INFO L226 Difference]: Without dead ends: 6932 [2022-11-19 08:40:49,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51500 ImplicationChecksByTransitivity, 54.3s TimeCoverageRelationStatistics Valid=11725, Invalid=117515, Unknown=0, NotChecked=0, Total=129240 [2022-11-19 08:40:49,397 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 4924 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 7505 mSolverCounterSat, 2721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4925 SdHoareTripleChecker+Valid, 2807 SdHoareTripleChecker+Invalid, 10226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2721 IncrementalHoareTripleChecker+Valid, 7505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:40:49,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4925 Valid, 2807 Invalid, 10226 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2721 Valid, 7505 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-19 08:40:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2022-11-19 08:40:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 5371. [2022-11-19 08:40:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5371 states, 4066 states have (on average 1.1571569109690114) internal successors, (4705), 4110 states have internal predecessors, (4705), 694 states have call successors, (694), 587 states have call predecessors, (694), 609 states have return successors, (885), 674 states have call predecessors, (885), 693 states have call successors, (885) [2022-11-19 08:40:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5371 states to 5371 states and 6284 transitions. [2022-11-19 08:40:50,528 INFO L78 Accepts]: Start accepts. Automaton has 5371 states and 6284 transitions. Word has length 114 [2022-11-19 08:40:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:40:50,529 INFO L495 AbstractCegarLoop]: Abstraction has 5371 states and 6284 transitions. [2022-11-19 08:40:50,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2022-11-19 08:40:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 5371 states and 6284 transitions. [2022-11-19 08:40:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 08:40:50,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:40:50,532 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:40:50,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-19 08:40:50,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:50,733 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:40:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:40:50,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1282968393, now seen corresponding path program 1 times [2022-11-19 08:40:50,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:40:50,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585334950] [2022-11-19 08:40:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:50,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:40:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:40:51,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:40:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585334950] [2022-11-19 08:40:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585334950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:40:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414818096] [2022-11-19 08:40:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:51,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:40:51,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:40:51,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:40:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:40:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:40:51,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-19 08:40:51,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414818096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:40:51,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531306272] [2022-11-19 08:40:51,796 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-19 08:40:51,796 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:40:51,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:40:51,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:40:51,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:40:58,279 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2022-11-19 08:41:01,191 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 67 for LOIs [2022-11-19 08:41:01,203 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 193 for LOIs [2022-11-19 08:41:01,265 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2022-11-19 08:41:01,378 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2022-11-19 08:41:01,775 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 217 for LOIs [2022-11-19 08:41:03,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:41:30,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [531306272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:41:30,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:41:30,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [13, 9, 6] total 69 [2022-11-19 08:41:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735436663] [2022-11-19 08:41:30,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:41:30,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 08:41:30,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:41:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 08:41:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=4307, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 08:41:30,705 INFO L87 Difference]: Start difference. First operand 5371 states and 6284 transitions. Second operand has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 08:43:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:43:02,483 INFO L93 Difference]: Finished difference Result 9071 states and 10695 transitions. [2022-11-19 08:43:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-19 08:43:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 112 [2022-11-19 08:43:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:43:02,497 INFO L225 Difference]: With dead ends: 9071 [2022-11-19 08:43:02,497 INFO L226 Difference]: Without dead ends: 4979 [2022-11-19 08:43:02,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 273 SyntacticMatches, 17 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11614 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=2132, Invalid=26938, Unknown=0, NotChecked=0, Total=29070 [2022-11-19 08:43:02,508 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 568 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 5277 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 5478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 5277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:43:02,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1995 Invalid, 5478 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [201 Valid, 5277 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-19 08:43:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2022-11-19 08:43:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 4926. [2022-11-19 08:43:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 3722 states have (on average 1.1563675443310049) internal successors, (4304), 3762 states have internal predecessors, (4304), 640 states have call successors, (640), 540 states have call predecessors, (640), 562 states have return successors, (819), 624 states have call predecessors, (819), 639 states have call successors, (819) [2022-11-19 08:43:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 5763 transitions. [2022-11-19 08:43:03,742 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 5763 transitions. Word has length 112 [2022-11-19 08:43:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:43:03,743 INFO L495 AbstractCegarLoop]: Abstraction has 4926 states and 5763 transitions. [2022-11-19 08:43:03,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 08:43:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 5763 transitions. [2022-11-19 08:43:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 08:43:03,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:43:03,747 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 08:43:03,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:43:03,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-19 08:43:03,947 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:43:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:43:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash 159345056, now seen corresponding path program 1 times [2022-11-19 08:43:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:43:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153036376] [2022-11-19 08:43:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:03,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:43:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:04,349 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 08:43:04,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:43:04,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153036376] [2022-11-19 08:43:04,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153036376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:43:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499859720] [2022-11-19 08:43:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:04,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:43:04,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:43:04,352 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:43:04,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:43:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:04,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:43:04,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:04,631 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 08:43:04,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:04,927 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 08:43:04,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499859720] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:43:04,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:43:04,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 08:43:04,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547228368] [2022-11-19 08:43:04,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:43:04,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:43:04,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:43:04,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:43:04,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:43:04,931 INFO L87 Difference]: Start difference. First operand 4926 states and 5763 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 08:43:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:43:06,873 INFO L93 Difference]: Finished difference Result 6254 states and 7316 transitions. [2022-11-19 08:43:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:43:06,875 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 08:43:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:43:06,890 INFO L225 Difference]: With dead ends: 6254 [2022-11-19 08:43:06,891 INFO L226 Difference]: Without dead ends: 5263 [2022-11-19 08:43:06,895 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 08:43:06,895 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 247 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:43:06,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 481 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:43:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2022-11-19 08:43:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 5006. [2022-11-19 08:43:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 3767 states have (on average 1.156092381205203) internal successors, (4355), 3810 states have internal predecessors, (4355), 659 states have call successors, (659), 549 states have call predecessors, (659), 578 states have return successors, (859), 647 states have call predecessors, (859), 658 states have call successors, (859) [2022-11-19 08:43:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 5873 transitions. [2022-11-19 08:43:08,107 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 5873 transitions. Word has length 115 [2022-11-19 08:43:08,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:43:08,108 INFO L495 AbstractCegarLoop]: Abstraction has 5006 states and 5873 transitions. [2022-11-19 08:43:08,108 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 08:43:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 5873 transitions. [2022-11-19 08:43:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 08:43:08,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:43:08,114 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:43:08,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:43:08,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-19 08:43:08,315 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:43:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:43:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1739317777, now seen corresponding path program 1 times [2022-11-19 08:43:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:43:08,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469927017] [2022-11-19 08:43:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:08,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:43:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:43:09,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:43:09,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469927017] [2022-11-19 08:43:09,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469927017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:43:09,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767202393] [2022-11-19 08:43:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:09,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:43:09,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:43:09,066 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:43:09,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:43:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:09,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:43:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:43:09,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 08:43:10,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767202393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:43:10,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1050430655] [2022-11-19 08:43:10,972 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 08:43:10,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:43:10,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:43:10,974 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:43:10,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:43:29,076 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 120 for LOIs [2022-11-19 08:43:29,154 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 68 for LOIs [2022-11-19 08:43:29,170 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 139 for LOIs [2022-11-19 08:43:29,216 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 77 for LOIs [2022-11-19 08:43:29,356 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 125 for LOIs [2022-11-19 08:43:29,791 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 120 for LOIs [2022-11-19 08:43:29,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:43:58,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '316332#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (= ~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) (<= ~t2_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|) (<= |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) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start_eval2_~tmp~5#1| 0)) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-19 08:43:58,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:43:58,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:43:58,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 14] total 39 [2022-11-19 08:43:58,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204795232] [2022-11-19 08:43:58,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:43:58,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 08:43:58,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:43:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 08:43:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=7579, Unknown=0, NotChecked=0, Total=8190 [2022-11-19 08:43:58,206 INFO L87 Difference]: Start difference. First operand 5006 states and 5873 transitions. Second operand has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-11-19 08:44:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:44:21,551 INFO L93 Difference]: Finished difference Result 11631 states and 13887 transitions. [2022-11-19 08:44:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-19 08:44:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) Word has length 114 [2022-11-19 08:44:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:44:21,569 INFO L225 Difference]: With dead ends: 11631 [2022-11-19 08:44:21,569 INFO L226 Difference]: Without dead ends: 8336 [2022-11-19 08:44:21,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 318 SyntacticMatches, 21 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32625 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=8353, Invalid=68099, Unknown=0, NotChecked=0, Total=76452 [2022-11-19 08:44:21,581 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 4190 mSDsluCounter, 2706 mSDsCounter, 0 mSdLazyCounter, 7939 mSolverCounterSat, 3015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4190 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 10954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3015 IncrementalHoareTripleChecker+Valid, 7939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:44:21,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4190 Valid, 2908 Invalid, 10954 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3015 Valid, 7939 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-19 08:44:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2022-11-19 08:44:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 5256. [2022-11-19 08:44:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 3903 states have (on average 1.1462977197027928) internal successors, (4474), 3962 states have internal predecessors, (4474), 721 states have call successors, (721), 604 states have call predecessors, (721), 630 states have return successors, (841), 690 states have call predecessors, (841), 720 states have call successors, (841) [2022-11-19 08:44:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 6036 transitions. [2022-11-19 08:44:23,008 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 6036 transitions. Word has length 114 [2022-11-19 08:44:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:44:23,008 INFO L495 AbstractCegarLoop]: Abstraction has 5256 states and 6036 transitions. [2022-11-19 08:44:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-11-19 08:44:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 6036 transitions. [2022-11-19 08:44:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:44:23,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:44:23,012 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 08:44:23,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:44:23,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-19 08:44:23,219 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:44:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:44:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash 758017092, now seen corresponding path program 1 times [2022-11-19 08:44:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:44:23,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781471264] [2022-11-19 08:44:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:44:23,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:44:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:44:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:44:24,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:44:24,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781471264] [2022-11-19 08:44:24,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781471264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:44:24,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049525478] [2022-11-19 08:44:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:44:24,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:44:24,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:44:24,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:44:24,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 08:44:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:44:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 08:44:24,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:44:25,317 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 08:44:25,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:44:27,672 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 08:44:27,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049525478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:44:27,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695119010] [2022-11-19 08:44:27,676 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 08:44:27,676 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:44:27,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:44:27,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:44:27,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:44:34,019 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 172 for LOIs [2022-11-19 08:44:34,403 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 121 for LOIs [2022-11-19 08:44:34,483 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 60 for LOIs [2022-11-19 08:44:34,494 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 184 for LOIs [2022-11-19 08:44:35,506 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 112 for LOIs [2022-11-19 08:44:35,640 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 60 for LOIs [2022-11-19 08:44:35,741 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 176 for LOIs [2022-11-19 08:44:35,993 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 199 for LOIs [2022-11-19 08:44:36,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:45:08,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '341631#(and (= ~q_req_up~0 1) (= ~t1_pc~0 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) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~c_dr_pc~0 1) (= ~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) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= 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|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:45:08,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:45:08,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:45:08,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-19 08:45:08,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935506199] [2022-11-19 08:45:08,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:45:08,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 08:45:08,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:08,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 08:45:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=10833, Unknown=0, NotChecked=0, Total=11772 [2022-11-19 08:45:08,994 INFO L87 Difference]: Start difference. First operand 5256 states and 6036 transitions. Second operand has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2022-11-19 08:45:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:25,562 INFO L93 Difference]: Finished difference Result 7474 states and 8629 transitions. [2022-11-19 08:45:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-19 08:45:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) Word has length 124 [2022-11-19 08:45:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:25,574 INFO L225 Difference]: With dead ends: 7474 [2022-11-19 08:45:25,574 INFO L226 Difference]: Without dead ends: 6403 [2022-11-19 08:45:25,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17455 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=4401, Invalid=40331, Unknown=0, NotChecked=0, Total=44732 [2022-11-19 08:45:25,580 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 5270 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 6827 mSolverCounterSat, 3678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5270 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 10505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3678 IncrementalHoareTripleChecker+Valid, 6827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:25,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5270 Valid, 2208 Invalid, 10505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3678 Valid, 6827 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 08:45:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2022-11-19 08:45:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 5072. [2022-11-19 08:45:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5072 states, 3791 states have (on average 1.1463993669216566) internal successors, (4346), 3849 states have internal predecessors, (4346), 681 states have call successors, (681), 572 states have call predecessors, (681), 598 states have return successors, (791), 651 states have call predecessors, (791), 680 states have call successors, (791) [2022-11-19 08:45:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5072 states to 5072 states and 5818 transitions. [2022-11-19 08:45:27,068 INFO L78 Accepts]: Start accepts. Automaton has 5072 states and 5818 transitions. Word has length 124 [2022-11-19 08:45:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:27,068 INFO L495 AbstractCegarLoop]: Abstraction has 5072 states and 5818 transitions. [2022-11-19 08:45:27,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2022-11-19 08:45:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5072 states and 5818 transitions. [2022-11-19 08:45:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:45:27,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:45:27,072 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 08:45:27,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:45:27,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-19 08:45:27,273 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:45:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:45:27,273 INFO L85 PathProgramCache]: Analyzing trace with hash -295057219, now seen corresponding path program 1 times [2022-11-19 08:45:27,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:45:27,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304894694] [2022-11-19 08:45:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:27,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:45:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:27,513 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 08:45:27,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:45:27,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304894694] [2022-11-19 08:45:27,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304894694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:45:27,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818429282] [2022-11-19 08:45:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:27,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:45:27,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:45:27,517 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:45:27,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 08:45:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:27,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:45:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:45:27,813 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 08:45:27,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:45:28,069 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 08:45:28,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818429282] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:45:28,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:45:28,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 08:45:28,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257106116] [2022-11-19 08:45:28,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:45:28,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:45:28,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:45:28,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:45:28,072 INFO L87 Difference]: Start difference. First operand 5072 states and 5818 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 08:45:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:30,292 INFO L93 Difference]: Finished difference Result 5733 states and 6565 transitions. [2022-11-19 08:45:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:45:30,292 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 08:45:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:30,301 INFO L225 Difference]: With dead ends: 5733 [2022-11-19 08:45:30,301 INFO L226 Difference]: Without dead ends: 4846 [2022-11-19 08:45:30,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:45:30,305 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 332 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:30,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 448 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:45:30,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2022-11-19 08:45:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4803. [2022-11-19 08:45:31,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 3592 states have (on average 1.1417037861915367) internal successors, (4101), 3650 states have internal predecessors, (4101), 645 states have call successors, (645), 542 states have call predecessors, (645), 564 states have return successors, (750), 611 states have call predecessors, (750), 644 states have call successors, (750) [2022-11-19 08:45:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 5496 transitions. [2022-11-19 08:45:31,703 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 5496 transitions. Word has length 125 [2022-11-19 08:45:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:31,704 INFO L495 AbstractCegarLoop]: Abstraction has 4803 states and 5496 transitions. [2022-11-19 08:45:31,704 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 08:45:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 5496 transitions. [2022-11-19 08:45:31,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 08:45:31,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:45:31,707 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:45:31,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:45:31,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-19 08:45:31,908 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:45:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:45:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -754676394, now seen corresponding path program 1 times [2022-11-19 08:45:31,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:45:31,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000914127] [2022-11-19 08:45:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:31,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:45:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 08:45:32,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:45:32,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000914127] [2022-11-19 08:45:32,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000914127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:45:32,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:45:32,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:45:32,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156600495] [2022-11-19 08:45:32,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:45:32,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:45:32,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:32,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:45:32,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:45:32,074 INFO L87 Difference]: Start difference. First operand 4803 states and 5496 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:45:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:35,251 INFO L93 Difference]: Finished difference Result 11311 states and 13034 transitions. [2022-11-19 08:45:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:45:35,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 127 [2022-11-19 08:45:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:35,268 INFO L225 Difference]: With dead ends: 11311 [2022-11-19 08:45:35,268 INFO L226 Difference]: Without dead ends: 8571 [2022-11-19 08:45:35,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:45:35,274 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 311 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:35,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 709 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:45:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8571 states. [2022-11-19 08:45:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8571 to 7272. [2022-11-19 08:45:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7272 states, 5456 states have (on average 1.1548753665689149) internal successors, (6301), 5535 states have internal predecessors, (6301), 970 states have call successors, (970), 819 states have call predecessors, (970), 844 states have return successors, (1114), 918 states have call predecessors, (1114), 969 states have call successors, (1114) [2022-11-19 08:45:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7272 states to 7272 states and 8385 transitions. [2022-11-19 08:45:37,369 INFO L78 Accepts]: Start accepts. Automaton has 7272 states and 8385 transitions. Word has length 127 [2022-11-19 08:45:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:37,370 INFO L495 AbstractCegarLoop]: Abstraction has 7272 states and 8385 transitions. [2022-11-19 08:45:37,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:45:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7272 states and 8385 transitions. [2022-11-19 08:45:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-19 08:45:37,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:45:37,379 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:45:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-19 08:45:37,379 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:45:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:45:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1470280667, now seen corresponding path program 1 times [2022-11-19 08:45:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:45:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225546785] [2022-11-19 08:45:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:37,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:45:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-19 08:45:37,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:45:37,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225546785] [2022-11-19 08:45:37,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225546785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:45:37,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906217755] [2022-11-19 08:45:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:37,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:45:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:45:37,547 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:45:37,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 08:45:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:45:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:45:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 08:45:37,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:45:37,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906217755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:45:37,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:45:37,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-19 08:45:37,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894863997] [2022-11-19 08:45:37,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:45:37,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:45:37,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:45:37,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:45:37,817 INFO L87 Difference]: Start difference. First operand 7272 states and 8385 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:45:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:40,425 INFO L93 Difference]: Finished difference Result 14469 states and 16551 transitions. [2022-11-19 08:45:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:45:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 158 [2022-11-19 08:45:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:40,441 INFO L225 Difference]: With dead ends: 14469 [2022-11-19 08:45:40,442 INFO L226 Difference]: Without dead ends: 7964 [2022-11-19 08:45:40,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:45:40,455 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 156 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:40,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 526 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:45:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7964 states. [2022-11-19 08:45:42,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7964 to 7934. [2022-11-19 08:45:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 5908 states have (on average 1.1113744075829384) internal successors, (6566), 5993 states have internal predecessors, (6566), 1100 states have call successors, (1100), 901 states have call predecessors, (1100), 924 states have return successors, (1228), 1040 states have call predecessors, (1228), 1099 states have call successors, (1228) [2022-11-19 08:45:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 8894 transitions. [2022-11-19 08:45:42,894 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 8894 transitions. Word has length 158 [2022-11-19 08:45:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:42,894 INFO L495 AbstractCegarLoop]: Abstraction has 7934 states and 8894 transitions. [2022-11-19 08:45:42,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:45:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 8894 transitions. [2022-11-19 08:45:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 08:45:42,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:45:42,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 08:45:42,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:45:43,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 08:45:43,102 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:45:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:45:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2032070462, now seen corresponding path program 1 times [2022-11-19 08:45:43,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:45:43,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143862859] [2022-11-19 08:45:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:43,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:45:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-19 08:45:43,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:45:43,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143862859] [2022-11-19 08:45:43,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143862859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:45:43,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671367251] [2022-11-19 08:45:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:43,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:45:43,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:45:43,281 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:45:43,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 08:45:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:45:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:45:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-19 08:45:43,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:45:43,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671367251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:45:43,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:45:43,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-19 08:45:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082614504] [2022-11-19 08:45:43,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:45:43,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:45:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:45:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:45:43,537 INFO L87 Difference]: Start difference. First operand 7934 states and 8894 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:45:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:45,585 INFO L93 Difference]: Finished difference Result 11868 states and 13296 transitions. [2022-11-19 08:45:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:45:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 159 [2022-11-19 08:45:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:45,597 INFO L225 Difference]: With dead ends: 11868 [2022-11-19 08:45:45,598 INFO L226 Difference]: Without dead ends: 6108 [2022-11-19 08:45:45,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:45:45,606 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 167 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:45,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 509 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:45:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2022-11-19 08:45:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 6029. [2022-11-19 08:45:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 4484 states have (on average 1.1048171275646743) internal successors, (4954), 4553 states have internal predecessors, (4954), 832 states have call successors, (832), 684 states have call predecessors, (832), 711 states have return successors, (928), 792 states have call predecessors, (928), 831 states have call successors, (928) [2022-11-19 08:45:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 6714 transitions. [2022-11-19 08:45:47,829 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 6714 transitions. Word has length 159 [2022-11-19 08:45:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:47,830 INFO L495 AbstractCegarLoop]: Abstraction has 6029 states and 6714 transitions. [2022-11-19 08:45:47,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:45:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 6714 transitions. [2022-11-19 08:45:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-19 08:45:47,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:45:47,837 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 08:45:47,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-19 08:45:48,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-19 08:45:48,038 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:45:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:45:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash 264810841, now seen corresponding path program 1 times [2022-11-19 08:45:48,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:45:48,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526113782] [2022-11-19 08:45:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:48,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:45:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 89 proven. 15 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-19 08:45:48,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:45:48,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526113782] [2022-11-19 08:45:48,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526113782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:45:48,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310981777] [2022-11-19 08:45:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:48,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:45:48,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:45:48,333 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:45:48,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 08:45:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:45:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:45:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:45:48,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:45:48,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310981777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:45:48,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:45:48,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 08:45:48,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207736797] [2022-11-19 08:45:48,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:45:48,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:45:48,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:45:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:45:48,608 INFO L87 Difference]: Start difference. First operand 6029 states and 6714 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, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-19 08:45:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:49,938 INFO L93 Difference]: Finished difference Result 6519 states and 7254 transitions. [2022-11-19 08:45:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:45:49,939 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, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 160 [2022-11-19 08:45:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:49,941 INFO L225 Difference]: With dead ends: 6519 [2022-11-19 08:45:49,941 INFO L226 Difference]: Without dead ends: 693 [2022-11-19 08:45:49,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 167 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 08:45:49,949 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 177 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:49,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 428 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:45:49,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-19 08:45:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2022-11-19 08:45:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 474 states have (on average 1.1033755274261603) internal successors, (523), 484 states have internal predecessors, (523), 108 states have call successors, (108), 92 states have call predecessors, (108), 110 states have return successors, (137), 116 states have call predecessors, (137), 107 states have call successors, (137) [2022-11-19 08:45:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 768 transitions. [2022-11-19 08:45:50,231 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 768 transitions. Word has length 160 [2022-11-19 08:45:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:50,231 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 768 transitions. [2022-11-19 08:45:50,231 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, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-19 08:45:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 768 transitions. [2022-11-19 08:45:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-19 08:45:50,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:45:50,233 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 08:45:50,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:45:50,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:45:50,434 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:45:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:45:50,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1134278309, now seen corresponding path program 1 times [2022-11-19 08:45:50,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:45:50,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325420731] [2022-11-19 08:45:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:50,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:45:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 115 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-19 08:45:51,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:45:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325420731] [2022-11-19 08:45:51,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325420731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:45:51,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765903460] [2022-11-19 08:45:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:51,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:45:51,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:45:51,140 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:45:51,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 08:45:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:45:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:45:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-19 08:45:51,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:45:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765903460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:45:51,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:45:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [19] total 26 [2022-11-19 08:45:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798313272] [2022-11-19 08:45:51,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:45:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:45:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:45:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:45:51,528 INFO L87 Difference]: Start difference. First operand 693 states and 768 transitions. Second operand has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-19 08:45:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:51,893 INFO L93 Difference]: Finished difference Result 946 states and 1046 transitions. [2022-11-19 08:45:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:45:51,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) Word has length 220 [2022-11-19 08:45:51,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:51,894 INFO L225 Difference]: With dead ends: 946 [2022-11-19 08:45:51,894 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 08:45:51,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:45:51,896 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 44 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:51,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 748 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:45:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 08:45:51,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 08:45:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:45:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 08:45:51,898 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 220 [2022-11-19 08:45:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:51,898 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 08:45:51,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-19 08:45:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 08:45:51,899 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 08:45:51,901 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-19 08:45:51,902 INFO L805 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-19 08:45:51,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 08:45:52,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e029ee-fb73-4163-8f52-178f5be15bb1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-19 08:45:52,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 08:46:50,193 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 347 DAG size of output: 341 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)