./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.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_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/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_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/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_3028a64e-2c66-408a-bf05-743e7d07ebd8/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 e7bf678f67bc088f549a4abb07f450d970cef489f8318e3fb7c3771679b9e87b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:52:05,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:52:05,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:52:05,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:52:05,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:52:05,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:52:05,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:52:05,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:52:05,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:52:05,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:52:05,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:52:05,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:52:05,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:52:05,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:52:05,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:52:05,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:52:05,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:52:05,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:52:05,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:52:05,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:52:05,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:52:05,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:52:05,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:52:05,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:52:05,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:52:05,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:52:05,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:52:05,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:52:05,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:52:05,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:52:05,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:52:05,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:52:05,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:52:05,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:52:05,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:52:05,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:52:05,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:52:05,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:52:05,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:52:05,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:52:05,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:52:05,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:52:05,219 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:52:05,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:52:05,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:52:05,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:52:05,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:52:05,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:52:05,222 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:52:05,222 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:52:05,222 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:52:05,222 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:52:05,223 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:52:05,224 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:52:05,224 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:52:05,224 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:52:05,224 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:52:05,225 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:52:05,225 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:52:05,225 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:52:05,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:52:05,226 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:52:05,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:52:05,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:52:05,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:52:05,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:52:05,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:52:05,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:52:05,229 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:52:05,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:52:05,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:52:05,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:52:05,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:52:05,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:52:05,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:52:05,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:52:05,232 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:52:05,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:52:05,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:52:05,232 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:52:05,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:52:05,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:52:05,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:52:05,233 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_3028a64e-2c66-408a-bf05-743e7d07ebd8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7bf678f67bc088f549a4abb07f450d970cef489f8318e3fb7c3771679b9e87b [2022-11-19 07:52:05,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:52:05,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:52:05,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:52:05,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:52:05,565 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:52:05,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-19 07:52:05,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/data/74c0ca621/df81ca45a3d4453ca65a207d6a1d5340/FLAGacdac7428 [2022-11-19 07:52:06,176 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:52:06,177 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-19 07:52:06,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/data/74c0ca621/df81ca45a3d4453ca65a207d6a1d5340/FLAGacdac7428 [2022-11-19 07:52:06,489 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/data/74c0ca621/df81ca45a3d4453ca65a207d6a1d5340 [2022-11-19 07:52:06,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:52:06,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:52:06,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:52:06,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:52:06,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:52:06,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:52:06" (1/1) ... [2022-11-19 07:52:06,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7318824b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:06, skipping insertion in model container [2022-11-19 07:52:06,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:52:06" (1/1) ... [2022-11-19 07:52:06,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:52:06,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:52:06,894 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_3028a64e-2c66-408a-bf05-743e7d07ebd8/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[7981,7994] [2022-11-19 07:52:06,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:52:06,952 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:52:07,031 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_3028a64e-2c66-408a-bf05-743e7d07ebd8/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[7981,7994] [2022-11-19 07:52:07,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:52:07,116 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:52:07,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07 WrapperNode [2022-11-19 07:52:07,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:52:07,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:52:07,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:52:07,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:52:07,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,178 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 631 [2022-11-19 07:52:07,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:52:07,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:52:07,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:52:07,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:52:07,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,225 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:52:07,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:52:07,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:52:07,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:52:07,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (1/1) ... [2022-11-19 07:52:07,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:52:07,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:07,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:52:07,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:52:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:52:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:52:07,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:52:07,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:52:07,493 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:52:07,495 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:52:08,220 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:52:08,432 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:52:08,433 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:52:08,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:52:08 BoogieIcfgContainer [2022-11-19 07:52:08,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:52:08,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:52:08,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:52:08,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:52:08,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:52:06" (1/3) ... [2022-11-19 07:52:08,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc9545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:52:08, skipping insertion in model container [2022-11-19 07:52:08,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:52:07" (2/3) ... [2022-11-19 07:52:08,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc9545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:52:08, skipping insertion in model container [2022-11-19 07:52:08,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:52:08" (3/3) ... [2022-11-19 07:52:08,445 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-19 07:52:08,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:52:08,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:52:08,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:52:08,529 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;@31efa85a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:52:08,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:52:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 105 states have (on average 1.7619047619047619) internal successors, (185), 106 states have internal predecessors, (185), 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 07:52:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:52:08,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:08,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:08,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1872659106, now seen corresponding path program 1 times [2022-11-19 07:52:08,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:08,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822923844] [2022-11-19 07:52:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:08,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:09,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:09,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822923844] [2022-11-19 07:52:09,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822923844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:09,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:09,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:52:09,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711614365] [2022-11-19 07:52:09,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:09,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:52:09,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:09,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:52:09,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:52:09,340 INFO L87 Difference]: Start difference. First operand has 107 states, 105 states have (on average 1.7619047619047619) internal successors, (185), 106 states have internal predecessors, (185), 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) Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 07:52:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:09,627 INFO L93 Difference]: Finished difference Result 165 states and 271 transitions. [2022-11-19 07:52:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:52:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) Word has length 65 [2022-11-19 07:52:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:09,646 INFO L225 Difference]: With dead ends: 165 [2022-11-19 07:52:09,647 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 07:52:09,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:52:09,654 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 421 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:09,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 179 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:52:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 07:52:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-19 07:52:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2115384615384615) internal successors, (126), 104 states have internal predecessors, (126), 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 07:52:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2022-11-19 07:52:09,726 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 65 [2022-11-19 07:52:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:09,728 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2022-11-19 07:52:09,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 07:52:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2022-11-19 07:52:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:52:09,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:09,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:09,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:52:09,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1573435833, now seen corresponding path program 1 times [2022-11-19 07:52:09,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:09,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309351120] [2022-11-19 07:52:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:09,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309351120] [2022-11-19 07:52:09,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309351120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:09,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:09,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:52:09,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761388095] [2022-11-19 07:52:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:09,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:52:09,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:09,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:52:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:52:09,966 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 07:52:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:10,132 INFO L93 Difference]: Finished difference Result 165 states and 204 transitions. [2022-11-19 07:52:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:52:10,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) Word has length 66 [2022-11-19 07:52:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:10,134 INFO L225 Difference]: With dead ends: 165 [2022-11-19 07:52:10,134 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 07:52:10,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:52:10,136 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 307 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:10,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 82 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:52:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 07:52:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-19 07:52:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 104 states have internal predecessors, (124), 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 07:52:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2022-11-19 07:52:10,152 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 66 [2022-11-19 07:52:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:10,152 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2022-11-19 07:52:10,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 07:52:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2022-11-19 07:52:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:52:10,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:10,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:10,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:52:10,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:10,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1289706686, now seen corresponding path program 1 times [2022-11-19 07:52:10,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:10,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144856787] [2022-11-19 07:52:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:10,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:10,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:10,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144856787] [2022-11-19 07:52:10,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144856787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:10,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:10,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:52:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405050712] [2022-11-19 07:52:10,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:10,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:52:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:52:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:52:10,346 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 07:52:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:10,509 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2022-11-19 07:52:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:52:10,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) Word has length 67 [2022-11-19 07:52:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:10,517 INFO L225 Difference]: With dead ends: 161 [2022-11-19 07:52:10,517 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 07:52:10,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:52:10,524 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 289 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:10,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 90 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:52:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 07:52:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-19 07:52:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 104 states have internal predecessors, (122), 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 07:52:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2022-11-19 07:52:10,544 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 67 [2022-11-19 07:52:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:10,544 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2022-11-19 07:52:10,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 07:52:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2022-11-19 07:52:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 07:52:10,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:10,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:10,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:52:10,547 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2104420763, now seen corresponding path program 1 times [2022-11-19 07:52:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:10,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048949534] [2022-11-19 07:52:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:10,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:10,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048949534] [2022-11-19 07:52:10,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048949534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:10,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:10,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:52:10,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815769233] [2022-11-19 07:52:10,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:10,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:52:10,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:10,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:52:10,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:52:10,762 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 07:52:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:10,897 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2022-11-19 07:52:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:52:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) Word has length 68 [2022-11-19 07:52:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:10,899 INFO L225 Difference]: With dead ends: 169 [2022-11-19 07:52:10,899 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 07:52:10,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:52:10,910 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 306 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:10,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 74 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:52:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 07:52:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-19 07:52:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 104 states have internal predecessors, (120), 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 07:52:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-11-19 07:52:10,936 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 68 [2022-11-19 07:52:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:10,938 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-11-19 07:52:10,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 07:52:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-11-19 07:52:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:52:10,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:10,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:10,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:52:10,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1507078454, now seen corresponding path program 1 times [2022-11-19 07:52:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:10,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477984106] [2022-11-19 07:52:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:10,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:11,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:11,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477984106] [2022-11-19 07:52:11,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477984106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:11,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:11,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:52:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761716490] [2022-11-19 07:52:11,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:11,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:52:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:52:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:52:11,105 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 07:52:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:11,236 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2022-11-19 07:52:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:52:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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) Word has length 69 [2022-11-19 07:52:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:11,238 INFO L225 Difference]: With dead ends: 173 [2022-11-19 07:52:11,238 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 07:52:11,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:52:11,242 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 257 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:11,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 92 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:52:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 07:52:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-19 07:52:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 104 states have internal predecessors, (119), 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 07:52:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2022-11-19 07:52:11,281 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 69 [2022-11-19 07:52:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:11,282 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2022-11-19 07:52:11,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 07:52:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2022-11-19 07:52:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:52:11,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:11,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:11,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:52:11,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:11,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:11,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1965244399, now seen corresponding path program 1 times [2022-11-19 07:52:11,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:11,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873121069] [2022-11-19 07:52:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:11,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:21,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873121069] [2022-11-19 07:52:21,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873121069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:21,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:21,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-19 07:52:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273257463] [2022-11-19 07:52:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:21,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:52:21,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:52:21,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:52:21,004 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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 07:52:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:31,760 INFO L93 Difference]: Finished difference Result 259 states and 325 transitions. [2022-11-19 07:52:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 07:52:31,760 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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) Word has length 70 [2022-11-19 07:52:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:31,762 INFO L225 Difference]: With dead ends: 259 [2022-11-19 07:52:31,763 INFO L226 Difference]: Without dead ends: 219 [2022-11-19 07:52:31,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=983, Invalid=3307, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 07:52:31,765 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1008 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:31,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 928 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 07:52:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-19 07:52:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 140. [2022-11-19 07:52:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 139 states have internal predecessors, (166), 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 07:52:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2022-11-19 07:52:31,808 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 70 [2022-11-19 07:52:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:31,809 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2022-11-19 07:52:31,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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 07:52:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2022-11-19 07:52:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:52:31,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:31,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:31,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:52:31,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash -816894289, now seen corresponding path program 1 times [2022-11-19 07:52:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:31,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982060287] [2022-11-19 07:52:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:43,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:43,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982060287] [2022-11-19 07:52:43,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982060287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:43,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:43,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-11-19 07:52:43,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938278742] [2022-11-19 07:52:43,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:43,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:52:43,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:43,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:52:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:52:43,964 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 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 07:53:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:07,890 INFO L93 Difference]: Finished difference Result 341 states and 432 transitions. [2022-11-19 07:53:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:53:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 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) Word has length 72 [2022-11-19 07:53:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:07,892 INFO L225 Difference]: With dead ends: 341 [2022-11-19 07:53:07,892 INFO L226 Difference]: Without dead ends: 266 [2022-11-19 07:53:07,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=1006, Invalid=3416, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 07:53:07,900 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1140 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 2740 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 2807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:07,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 1740 Invalid, 2807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2740 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 07:53:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-19 07:53:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 211. [2022-11-19 07:53:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.2476190476190476) internal successors, (262), 210 states have internal predecessors, (262), 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 07:53:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 262 transitions. [2022-11-19 07:53:07,968 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 262 transitions. Word has length 72 [2022-11-19 07:53:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:07,968 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 262 transitions. [2022-11-19 07:53:07,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 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 07:53:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 262 transitions. [2022-11-19 07:53:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:53:07,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:07,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:07,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:53:07,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:07,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1012263667, now seen corresponding path program 1 times [2022-11-19 07:53:07,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:07,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559169065] [2022-11-19 07:53:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:07,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:53:08,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:08,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559169065] [2022-11-19 07:53:08,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559169065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:08,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:08,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:53:08,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130207486] [2022-11-19 07:53:08,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:08,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:53:08,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:53:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:53:08,185 INFO L87 Difference]: Start difference. First operand 211 states and 262 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 07:53:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:08,336 INFO L93 Difference]: Finished difference Result 465 states and 605 transitions. [2022-11-19 07:53:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:53:08,337 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), 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) Word has length 72 [2022-11-19 07:53:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:08,342 INFO L225 Difference]: With dead ends: 465 [2022-11-19 07:53:08,343 INFO L226 Difference]: Without dead ends: 323 [2022-11-19 07:53:08,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:53:08,344 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 108 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:08,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 258 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:53:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-19 07:53:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2022-11-19 07:53:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.278125) internal successors, (409), 320 states have internal predecessors, (409), 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 07:53:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 409 transitions. [2022-11-19 07:53:08,456 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 409 transitions. Word has length 72 [2022-11-19 07:53:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:08,457 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 409 transitions. [2022-11-19 07:53:08,457 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), 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 07:53:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 409 transitions. [2022-11-19 07:53:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:53:08,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:08,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:08,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:53:08,458 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:08,459 INFO L85 PathProgramCache]: Analyzing trace with hash 455700657, now seen corresponding path program 1 times [2022-11-19 07:53:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:08,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969747480] [2022-11-19 07:53:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:08,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:53:08,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:08,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969747480] [2022-11-19 07:53:08,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969747480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:08,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:08,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:53:08,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433024306] [2022-11-19 07:53:08,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:08,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:53:08,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:53:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:53:08,710 INFO L87 Difference]: Start difference. First operand 321 states and 409 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 07:53:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:09,044 INFO L93 Difference]: Finished difference Result 592 states and 771 transitions. [2022-11-19 07:53:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:53:09,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) Word has length 73 [2022-11-19 07:53:09,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:09,047 INFO L225 Difference]: With dead ends: 592 [2022-11-19 07:53:09,047 INFO L226 Difference]: Without dead ends: 479 [2022-11-19 07:53:09,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:53:09,048 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 250 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:09,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 613 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:53:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-19 07:53:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 282. [2022-11-19 07:53:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.2597864768683273) internal successors, (354), 281 states have internal predecessors, (354), 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 07:53:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 354 transitions. [2022-11-19 07:53:09,153 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 354 transitions. Word has length 73 [2022-11-19 07:53:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:09,153 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 354 transitions. [2022-11-19 07:53:09,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 07:53:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 354 transitions. [2022-11-19 07:53:09,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:53:09,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:09,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:09,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:53:09,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:09,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:09,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1795505551, now seen corresponding path program 1 times [2022-11-19 07:53:09,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:09,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029251482] [2022-11-19 07:53:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:09,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:53:09,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:09,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029251482] [2022-11-19 07:53:09,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029251482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:09,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:09,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:53:09,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193852284] [2022-11-19 07:53:09,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:09,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:09,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:09,296 INFO L87 Difference]: Start difference. First operand 282 states and 354 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 07:53:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:09,451 INFO L93 Difference]: Finished difference Result 531 states and 690 transitions. [2022-11-19 07:53:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) Word has length 88 [2022-11-19 07:53:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:09,453 INFO L225 Difference]: With dead ends: 531 [2022-11-19 07:53:09,454 INFO L226 Difference]: Without dead ends: 347 [2022-11-19 07:53:09,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:09,455 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:09,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 237 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:53:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-19 07:53:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 329. [2022-11-19 07:53:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.2621951219512195) internal successors, (414), 328 states have internal predecessors, (414), 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 07:53:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 414 transitions. [2022-11-19 07:53:09,589 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 414 transitions. Word has length 88 [2022-11-19 07:53:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:09,589 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 414 transitions. [2022-11-19 07:53:09,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 07:53:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 414 transitions. [2022-11-19 07:53:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:53:09,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:09,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:09,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:53:09,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash -998332346, now seen corresponding path program 1 times [2022-11-19 07:53:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:09,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936221123] [2022-11-19 07:53:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:09,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:53:09,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:09,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936221123] [2022-11-19 07:53:09,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936221123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:09,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:09,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:53:09,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858477864] [2022-11-19 07:53:09,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:09,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:09,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:09,766 INFO L87 Difference]: Start difference. First operand 329 states and 414 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 07:53:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:09,970 INFO L93 Difference]: Finished difference Result 740 states and 964 transitions. [2022-11-19 07:53:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) Word has length 109 [2022-11-19 07:53:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:09,973 INFO L225 Difference]: With dead ends: 740 [2022-11-19 07:53:09,973 INFO L226 Difference]: Without dead ends: 495 [2022-11-19 07:53:09,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:09,974 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 39 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:09,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 230 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:53:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-19 07:53:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 469. [2022-11-19 07:53:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.2820512820512822) internal successors, (600), 468 states have internal predecessors, (600), 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 07:53:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 600 transitions. [2022-11-19 07:53:10,138 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 600 transitions. Word has length 109 [2022-11-19 07:53:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:10,139 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 600 transitions. [2022-11-19 07:53:10,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 07:53:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 600 transitions. [2022-11-19 07:53:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:53:10,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:10,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:10,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:53:10,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2103524548, now seen corresponding path program 1 times [2022-11-19 07:53:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:10,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896409340] [2022-11-19 07:53:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:10,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:53:10,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:10,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896409340] [2022-11-19 07:53:10,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896409340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:10,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:10,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:53:10,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315597860] [2022-11-19 07:53:10,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:10,305 INFO L87 Difference]: Start difference. First operand 469 states and 600 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 07:53:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:10,595 INFO L93 Difference]: Finished difference Result 1172 states and 1540 transitions. [2022-11-19 07:53:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) Word has length 112 [2022-11-19 07:53:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:10,598 INFO L225 Difference]: With dead ends: 1172 [2022-11-19 07:53:10,599 INFO L226 Difference]: Without dead ends: 793 [2022-11-19 07:53:10,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:10,600 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 34 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:10,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 223 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:53:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-19 07:53:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2022-11-19 07:53:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 1.2984084880636604) internal successors, (979), 754 states have internal predecessors, (979), 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 07:53:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 979 transitions. [2022-11-19 07:53:10,824 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 979 transitions. Word has length 112 [2022-11-19 07:53:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:10,825 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 979 transitions. [2022-11-19 07:53:10,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 07:53:10,825 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 979 transitions. [2022-11-19 07:53:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:53:10,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:10,827 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:10,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:53:10,827 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash 993299961, now seen corresponding path program 1 times [2022-11-19 07:53:10,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:10,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064561159] [2022-11-19 07:53:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:10,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:53:10,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:10,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064561159] [2022-11-19 07:53:10,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064561159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:10,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:10,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:53:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316409839] [2022-11-19 07:53:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:10,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:10,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:10,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:10,993 INFO L87 Difference]: Start difference. First operand 755 states and 979 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 07:53:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:11,414 INFO L93 Difference]: Finished difference Result 2042 states and 2695 transitions. [2022-11-19 07:53:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) Word has length 115 [2022-11-19 07:53:11,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:11,419 INFO L225 Difference]: With dead ends: 2042 [2022-11-19 07:53:11,420 INFO L226 Difference]: Without dead ends: 1383 [2022-11-19 07:53:11,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:11,422 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 29 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:11,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 216 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:53:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-11-19 07:53:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1321. [2022-11-19 07:53:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 1.3075757575757576) internal successors, (1726), 1320 states have internal predecessors, (1726), 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 07:53:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1726 transitions. [2022-11-19 07:53:11,807 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1726 transitions. Word has length 115 [2022-11-19 07:53:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:11,807 INFO L495 AbstractCegarLoop]: Abstraction has 1321 states and 1726 transitions. [2022-11-19 07:53:11,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 07:53:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1726 transitions. [2022-11-19 07:53:11,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-19 07:53:11,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:11,809 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:11,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:53:11,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:11,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1239551814, now seen corresponding path program 1 times [2022-11-19 07:53:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:11,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710888069] [2022-11-19 07:53:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:11,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:53:11,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:11,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710888069] [2022-11-19 07:53:11,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710888069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:11,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:11,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:53:11,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798264843] [2022-11-19 07:53:11,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:11,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:11,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:11,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:11,977 INFO L87 Difference]: Start difference. First operand 1321 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 07:53:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:12,633 INFO L93 Difference]: Finished difference Result 3756 states and 4959 transitions. [2022-11-19 07:53:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) Word has length 118 [2022-11-19 07:53:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:12,644 INFO L225 Difference]: With dead ends: 3756 [2022-11-19 07:53:12,644 INFO L226 Difference]: Without dead ends: 2533 [2022-11-19 07:53:12,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:12,647 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 24 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:12,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 209 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:53:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2022-11-19 07:53:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2022-11-19 07:53:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 1.311742582532386) internal successors, (3139), 2393 states have internal predecessors, (3139), 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 07:53:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 3139 transitions. [2022-11-19 07:53:13,168 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 3139 transitions. Word has length 118 [2022-11-19 07:53:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:13,169 INFO L495 AbstractCegarLoop]: Abstraction has 2394 states and 3139 transitions. [2022-11-19 07:53:13,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 07:53:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 3139 transitions. [2022-11-19 07:53:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:53:13,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:13,171 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:13,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:53:13,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash 313151429, now seen corresponding path program 1 times [2022-11-19 07:53:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158627023] [2022-11-19 07:53:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:53:13,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:13,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158627023] [2022-11-19 07:53:13,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158627023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:13,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:13,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:53:13,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324141848] [2022-11-19 07:53:13,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:13,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:53:13,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:53:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:53:13,771 INFO L87 Difference]: Start difference. First operand 2394 states and 3139 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 9 states have internal predecessors, (114), 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 07:53:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:15,111 INFO L93 Difference]: Finished difference Result 5710 states and 7531 transitions. [2022-11-19 07:53:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:53:15,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 9 states have internal predecessors, (114), 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) Word has length 121 [2022-11-19 07:53:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:15,125 INFO L225 Difference]: With dead ends: 5710 [2022-11-19 07:53:15,126 INFO L226 Difference]: Without dead ends: 3385 [2022-11-19 07:53:15,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:53:15,135 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 418 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:15,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 283 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:53:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2022-11-19 07:53:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3383. [2022-11-19 07:53:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3382 states have (on average 1.3045535186280308) internal successors, (4412), 3382 states have internal predecessors, (4412), 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 07:53:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4412 transitions. [2022-11-19 07:53:16,116 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4412 transitions. Word has length 121 [2022-11-19 07:53:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:16,116 INFO L495 AbstractCegarLoop]: Abstraction has 3383 states and 4412 transitions. [2022-11-19 07:53:16,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 9 states have internal predecessors, (114), 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 07:53:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4412 transitions. [2022-11-19 07:53:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:53:16,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:16,125 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:16,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:53:16,126 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1382196928, now seen corresponding path program 1 times [2022-11-19 07:53:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:16,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075932160] [2022-11-19 07:53:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:16,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:11,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075932160] [2022-11-19 07:54:11,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075932160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:11,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658725757] [2022-11-19 07:54:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:11,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:11,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:11,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3028a64e-2c66-408a-bf05-743e7d07ebd8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:54:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 142 conjunts are in the unsatisfiable core [2022-11-19 07:54:11,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:34,596 WARN L233 SmtUtils]: Spent 16.29s on a formula simplification. DAG size of input: 283 DAG size of output: 267 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)