./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb34721bf39b8c345e8997284756581f81ddbf5d57990eeac4742dbd2546fd8d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 21:09:29,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:09:29,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:09:29,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:09:29,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:09:29,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:09:29,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:09:29,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:09:29,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:09:29,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:09:29,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:09:29,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:09:29,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:09:29,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:09:30,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:09:30,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:09:30,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:09:30,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:09:30,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:09:30,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:09:30,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:09:30,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:09:30,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:09:30,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:09:30,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:09:30,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:09:30,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:09:30,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:09:30,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:09:30,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:09:30,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:09:30,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:09:30,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:09:30,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:09:30,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:09:30,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:09:30,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:09:30,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:09:30,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:09:30,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:09:30,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:09:30,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:09:30,091 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:09:30,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:09:30,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:09:30,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:09:30,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:09:30,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:09:30,094 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:09:30,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:09:30,094 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:09:30,095 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:09:30,096 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:09:30,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:09:30,096 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:09:30,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:09:30,097 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:09:30,097 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:09:30,098 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:09:30,098 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:09:30,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:09:30,099 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:09:30,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:09:30,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:09:30,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:09:30,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:09:30,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:09:30,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:09:30,101 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:09:30,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:09:30,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:09:30,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:09:30,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:09:30,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:09:30,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:09:30,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:09:30,104 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:09:30,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:09:30,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:09:30,104 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:09:30,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:09:30,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:09:30,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:09:30,105 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_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb34721bf39b8c345e8997284756581f81ddbf5d57990eeac4742dbd2546fd8d [2022-11-20 21:09:30,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:09:30,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:09:30,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:09:30,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:09:30,402 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:09:30,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-20 21:09:33,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:09:33,654 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:09:33,654 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-20 21:09:33,665 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/data/76be111e7/b0035ff0b38242b58e066316ab0462f5/FLAGaffc2a4e6 [2022-11-20 21:09:33,680 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/data/76be111e7/b0035ff0b38242b58e066316ab0462f5 [2022-11-20 21:09:33,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:09:33,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:09:33,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:09:33,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:09:33,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:09:33,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:09:33" (1/1) ... [2022-11-20 21:09:33,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5baedea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:33, skipping insertion in model container [2022-11-20 21:09:33,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:09:33" (1/1) ... [2022-11-20 21:09:33,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:09:33,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:09:34,011 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[7979,7992] [2022-11-20 21:09:34,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:09:34,084 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:09:34,167 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[7979,7992] [2022-11-20 21:09:34,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:09:34,232 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:09:34,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34 WrapperNode [2022-11-20 21:09:34,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:09:34,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:09:34,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:09:34,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:09:34,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,292 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 629 [2022-11-20 21:09:34,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:09:34,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:09:34,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:09:34,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:09:34,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,337 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:09:34,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:09:34,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:09:34,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:09:34,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (1/1) ... [2022-11-20 21:09:34,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:09:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:34,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:09:34,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:09:34,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:09:34,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:09:34,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:09:34,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:09:34,668 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:09:34,670 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:09:35,497 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:09:35,766 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:09:35,767 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 21:09:35,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:09:35 BoogieIcfgContainer [2022-11-20 21:09:35,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:09:35,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:09:35,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:09:35,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:09:35,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:09:33" (1/3) ... [2022-11-20 21:09:35,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbaae9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:09:35, skipping insertion in model container [2022-11-20 21:09:35,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:09:34" (2/3) ... [2022-11-20 21:09:35,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbaae9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:09:35, skipping insertion in model container [2022-11-20 21:09:35,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:09:35" (3/3) ... [2022-11-20 21:09:35,794 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-20 21:09:35,824 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:09:35,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:09:35,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:09:35,899 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;@651a0a8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:09:35,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:09:35,904 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) [2022-11-20 21:09:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 21:09:35,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:35,915 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] [2022-11-20 21:09:35,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1091369727, now seen corresponding path program 1 times [2022-11-20 21:09:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:35,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66833565] [2022-11-20 21:09:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:35,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:36,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:36,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66833565] [2022-11-20 21:09:36,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66833565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:36,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:36,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:36,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392679007] [2022-11-20 21:09:36,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:36,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:36,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:36,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:36,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:36,556 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) [2022-11-20 21:09:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:36,857 INFO L93 Difference]: Finished difference Result 181 states and 299 transitions. [2022-11-20 21:09:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:36,860 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 [2022-11-20 21:09:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:36,872 INFO L225 Difference]: With dead ends: 181 [2022-11-20 21:09:36,872 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 21:09:36,876 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 [2022-11-20 21:09:36,882 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 497 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 115 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 [2022-11-20 21:09:36,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 115 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:09:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 21:09:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 21:09:36,942 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) [2022-11-20 21:09:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2022-11-20 21:09:36,958 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 65 [2022-11-20 21:09:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:36,959 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2022-11-20 21:09:36,959 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) [2022-11-20 21:09:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2022-11-20 21:09:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 21:09:36,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:36,961 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] [2022-11-20 21:09:36,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:09:36,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash 810364762, now seen corresponding path program 1 times [2022-11-20 21:09:36,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:36,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218400503] [2022-11-20 21:09:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:37,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:37,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218400503] [2022-11-20 21:09:37,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218400503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:37,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:37,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:37,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255056476] [2022-11-20 21:09:37,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:37,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:37,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:37,250 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) [2022-11-20 21:09:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:37,401 INFO L93 Difference]: Finished difference Result 157 states and 195 transitions. [2022-11-20 21:09:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:37,402 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 [2022-11-20 21:09:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:37,404 INFO L225 Difference]: With dead ends: 157 [2022-11-20 21:09:37,404 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 21:09:37,404 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 [2022-11-20 21:09:37,406 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 284 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 98 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 [2022-11-20 21:09:37,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 98 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 21:09:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 21:09:37,435 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) [2022-11-20 21:09:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2022-11-20 21:09:37,440 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 66 [2022-11-20 21:09:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:37,441 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2022-11-20 21:09:37,442 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) [2022-11-20 21:09:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2022-11-20 21:09:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 21:09:37,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:37,445 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] [2022-11-20 21:09:37,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:09:37,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash 121278047, now seen corresponding path program 1 times [2022-11-20 21:09:37,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:37,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920449411] [2022-11-20 21:09:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:37,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:37,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:37,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920449411] [2022-11-20 21:09:37,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920449411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:37,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:37,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:37,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328209751] [2022-11-20 21:09:37,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:37,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:37,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:37,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:37,647 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) [2022-11-20 21:09:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:37,769 INFO L93 Difference]: Finished difference Result 165 states and 201 transitions. [2022-11-20 21:09:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:37,770 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 [2022-11-20 21:09:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:37,771 INFO L225 Difference]: With dead ends: 165 [2022-11-20 21:09:37,771 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 21:09:37,772 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 [2022-11-20 21:09:37,773 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 300 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 82 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 [2022-11-20 21:09:37,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 82 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 21:09:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 21:09:37,787 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) [2022-11-20 21:09:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2022-11-20 21:09:37,787 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 67 [2022-11-20 21:09:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:37,788 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2022-11-20 21:09:37,788 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) [2022-11-20 21:09:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2022-11-20 21:09:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 21:09:37,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:37,790 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] [2022-11-20 21:09:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:09:37,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash 495936506, now seen corresponding path program 1 times [2022-11-20 21:09:37,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:37,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801851008] [2022-11-20 21:09:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:37,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:37,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801851008] [2022-11-20 21:09:37,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801851008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:37,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:37,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:37,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759849818] [2022-11-20 21:09:37,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:37,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:37,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:37,931 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) [2022-11-20 21:09:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:38,065 INFO L93 Difference]: Finished difference Result 161 states and 193 transitions. [2022-11-20 21:09:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:38,066 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 [2022-11-20 21:09:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:38,067 INFO L225 Difference]: With dead ends: 161 [2022-11-20 21:09:38,067 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 21:09:38,068 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 [2022-11-20 21:09:38,069 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 282 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 90 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 [2022-11-20 21:09:38,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 90 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 21:09:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 21:09:38,084 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) [2022-11-20 21:09:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-11-20 21:09:38,085 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 68 [2022-11-20 21:09:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:38,085 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-11-20 21:09:38,085 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) [2022-11-20 21:09:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-11-20 21:09:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 21:09:38,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:38,087 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] [2022-11-20 21:09:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:09:38,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash 331955659, now seen corresponding path program 1 times [2022-11-20 21:09:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:38,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046450563] [2022-11-20 21:09:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:38,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:38,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046450563] [2022-11-20 21:09:38,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046450563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:38,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:38,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:38,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684876767] [2022-11-20 21:09:38,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:38,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:38,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:38,207 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) [2022-11-20 21:09:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:38,329 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2022-11-20 21:09:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:38,330 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 [2022-11-20 21:09:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:38,331 INFO L225 Difference]: With dead ends: 169 [2022-11-20 21:09:38,331 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 21:09:38,332 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 [2022-11-20 21:09:38,333 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 299 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:38,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 74 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 21:09:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 21:09:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 104 states have internal predecessors, (118), 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) [2022-11-20 21:09:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2022-11-20 21:09:38,349 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 69 [2022-11-20 21:09:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:38,350 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2022-11-20 21:09:38,350 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) [2022-11-20 21:09:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2022-11-20 21:09:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 21:09:38,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:38,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:38,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:09:38,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash 998784434, now seen corresponding path program 1 times [2022-11-20 21:09:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:38,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079923073] [2022-11-20 21:09:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:38,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:46,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:46,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079923073] [2022-11-20 21:09:46,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079923073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:46,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:46,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-11-20 21:09:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568713079] [2022-11-20 21:09:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:46,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 21:09:46,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:46,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 21:09:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 21:09:46,902 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 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) [2022-11-20 21:09:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:56,747 INFO L93 Difference]: Finished difference Result 182 states and 219 transitions. [2022-11-20 21:09:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 21:09:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 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 [2022-11-20 21:09:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:56,751 INFO L225 Difference]: With dead ends: 182 [2022-11-20 21:09:56,751 INFO L226 Difference]: Without dead ends: 142 [2022-11-20 21:09:56,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=847, Invalid=2575, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 21:09:56,754 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 638 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:56,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 1645 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 21:09:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-20 21:09:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-11-20 21:09:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 139 states have internal predecessors, (164), 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) [2022-11-20 21:09:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2022-11-20 21:09:56,779 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 70 [2022-11-20 21:09:56,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:56,779 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2022-11-20 21:09:56,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 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) [2022-11-20 21:09:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2022-11-20 21:09:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 21:09:56,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:56,781 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] [2022-11-20 21:09:56,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:09:56,782 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:56,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash 51496976, now seen corresponding path program 1 times [2022-11-20 21:09:56,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:56,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411992615] [2022-11-20 21:09:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:56,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:10,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:10,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411992615] [2022-11-20 21:10:10,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411992615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:10,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:10,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-11-20 21:10:10,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717290967] [2022-11-20 21:10:10,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 21:10:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:10:10,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 21:10:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 21:10:10,609 INFO L87 Difference]: Start difference. First operand 140 states and 164 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) [2022-11-20 21:10:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:28,480 INFO L93 Difference]: Finished difference Result 255 states and 315 transitions. [2022-11-20 21:10:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 21:10:28,482 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 [2022-11-20 21:10:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:28,484 INFO L225 Difference]: With dead ends: 255 [2022-11-20 21:10:28,484 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 21:10:28,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1109, Invalid=3583, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 21:10:28,487 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 796 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:28,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1061 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 21:10:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 21:10:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2022-11-20 21:10:28,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.2090395480225988) internal successors, (214), 177 states have internal predecessors, (214), 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) [2022-11-20 21:10:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 214 transitions. [2022-11-20 21:10:28,528 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 214 transitions. Word has length 72 [2022-11-20 21:10:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:28,528 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 214 transitions. [2022-11-20 21:10:28,529 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) [2022-11-20 21:10:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 214 transitions. [2022-11-20 21:10:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 21:10:28,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:28,530 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] [2022-11-20 21:10:28,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 21:10:28,530 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:28,531 INFO L85 PathProgramCache]: Analyzing trace with hash -143395746, now seen corresponding path program 1 times [2022-11-20 21:10:28,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:28,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136076147] [2022-11-20 21:10:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:28,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:28,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:28,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136076147] [2022-11-20 21:10:28,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136076147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:28,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:28,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:10:28,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899516006] [2022-11-20 21:10:28,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:28,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:10:28,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:10:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:10:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:10:28,694 INFO L87 Difference]: Start difference. First operand 178 states and 214 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) [2022-11-20 21:10:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:28,793 INFO L93 Difference]: Finished difference Result 403 states and 511 transitions. [2022-11-20 21:10:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:10:28,793 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 [2022-11-20 21:10:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:28,795 INFO L225 Difference]: With dead ends: 403 [2022-11-20 21:10:28,795 INFO L226 Difference]: Without dead ends: 290 [2022-11-20 21:10:28,796 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 [2022-11-20 21:10:28,797 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 107 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 255 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 [2022-11-20 21:10:28,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 255 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:10:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-20 21:10:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2022-11-20 21:10:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.2508710801393728) internal successors, (359), 287 states have internal predecessors, (359), 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) [2022-11-20 21:10:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 359 transitions. [2022-11-20 21:10:28,851 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 359 transitions. Word has length 72 [2022-11-20 21:10:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:28,852 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 359 transitions. [2022-11-20 21:10:28,852 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) [2022-11-20 21:10:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 359 transitions. [2022-11-20 21:10:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 21:10:28,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:28,853 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] [2022-11-20 21:10:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 21:10:28,853 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1606502752, now seen corresponding path program 1 times [2022-11-20 21:10:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:28,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764965223] [2022-11-20 21:10:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:29,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:29,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764965223] [2022-11-20 21:10:29,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764965223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:29,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:29,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 21:10:29,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709113235] [2022-11-20 21:10:29,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:29,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:10:29,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:10:29,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:10:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:10:29,096 INFO L87 Difference]: Start difference. First operand 288 states and 359 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) [2022-11-20 21:10:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:29,361 INFO L93 Difference]: Finished difference Result 563 states and 720 transitions. [2022-11-20 21:10:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:10:29,361 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 [2022-11-20 21:10:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:29,366 INFO L225 Difference]: With dead ends: 563 [2022-11-20 21:10:29,366 INFO L226 Difference]: Without dead ends: 450 [2022-11-20 21:10:29,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:10:29,369 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 247 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:29,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 604 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:10:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-20 21:10:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 249. [2022-11-20 21:10:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.2338709677419355) internal successors, (306), 248 states have internal predecessors, (306), 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) [2022-11-20 21:10:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 306 transitions. [2022-11-20 21:10:29,438 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 306 transitions. Word has length 73 [2022-11-20 21:10:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:29,439 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 306 transitions. [2022-11-20 21:10:29,439 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) [2022-11-20 21:10:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 306 transitions. [2022-11-20 21:10:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 21:10:29,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:29,440 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] [2022-11-20 21:10:29,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 21:10:29,441 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:29,441 INFO L85 PathProgramCache]: Analyzing trace with hash -433920517, now seen corresponding path program 1 times [2022-11-20 21:10:29,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:29,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007035920] [2022-11-20 21:10:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:29,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:29,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007035920] [2022-11-20 21:10:29,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007035920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:29,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:29,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:10:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467389350] [2022-11-20 21:10:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:29,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:10:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:10:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:10:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:29,589 INFO L87 Difference]: Start difference. First operand 249 states and 306 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) [2022-11-20 21:10:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:29,699 INFO L93 Difference]: Finished difference Result 502 states and 637 transitions. [2022-11-20 21:10:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:10:29,700 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 [2022-11-20 21:10:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:29,702 INFO L225 Difference]: With dead ends: 502 [2022-11-20 21:10:29,702 INFO L226 Difference]: Without dead ends: 318 [2022-11-20 21:10:29,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:29,703 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 43 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 239 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 [2022-11-20 21:10:29,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 239 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:10:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-20 21:10:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 300. [2022-11-20 21:10:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.2408026755852843) internal successors, (371), 299 states have internal predecessors, (371), 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) [2022-11-20 21:10:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 371 transitions. [2022-11-20 21:10:29,774 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 371 transitions. Word has length 88 [2022-11-20 21:10:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:29,774 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 371 transitions. [2022-11-20 21:10:29,774 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) [2022-11-20 21:10:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 371 transitions. [2022-11-20 21:10:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 21:10:29,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:29,775 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, 1, 1, 1] [2022-11-20 21:10:29,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 21:10:29,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2075525843, now seen corresponding path program 1 times [2022-11-20 21:10:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607961877] [2022-11-20 21:10:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:29,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:29,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:29,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607961877] [2022-11-20 21:10:29,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607961877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:29,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:29,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:10:29,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543778805] [2022-11-20 21:10:29,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:29,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:10:29,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:10:29,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:10:29,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:29,925 INFO L87 Difference]: Start difference. First operand 300 states and 371 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-11-20 21:10:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:30,070 INFO L93 Difference]: Finished difference Result 697 states and 892 transitions. [2022-11-20 21:10:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:10:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2022-11-20 21:10:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:30,074 INFO L225 Difference]: With dead ends: 697 [2022-11-20 21:10:30,074 INFO L226 Difference]: Without dead ends: 466 [2022-11-20 21:10:30,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:30,076 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 232 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 [2022-11-20 21:10:30,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 232 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:10:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-20 21:10:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 440. [2022-11-20 21:10:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.2596810933940774) internal successors, (553), 439 states have internal predecessors, (553), 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) [2022-11-20 21:10:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 553 transitions. [2022-11-20 21:10:30,179 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 553 transitions. Word has length 91 [2022-11-20 21:10:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:30,179 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 553 transitions. [2022-11-20 21:10:30,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-11-20 21:10:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 553 transitions. [2022-11-20 21:10:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-20 21:10:30,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:30,183 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, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:30,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 21:10:30,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -462399985, now seen corresponding path program 1 times [2022-11-20 21:10:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:30,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960014865] [2022-11-20 21:10:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:30,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:30,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960014865] [2022-11-20 21:10:30,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960014865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:30,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:30,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:10:30,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721533072] [2022-11-20 21:10:30,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:30,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:10:30,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:10:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:10:30,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:30,330 INFO L87 Difference]: Start difference. First operand 440 states and 553 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2022-11-20 21:10:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:30,550 INFO L93 Difference]: Finished difference Result 1135 states and 1462 transitions. [2022-11-20 21:10:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:10:30,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 94 [2022-11-20 21:10:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:30,553 INFO L225 Difference]: With dead ends: 1135 [2022-11-20 21:10:30,554 INFO L226 Difference]: Without dead ends: 764 [2022-11-20 21:10:30,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:30,556 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 33 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 225 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 [2022-11-20 21:10:30,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 225 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:10:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-20 21:10:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 726. [2022-11-20 21:10:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.273103448275862) internal successors, (923), 725 states have internal predecessors, (923), 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) [2022-11-20 21:10:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 923 transitions. [2022-11-20 21:10:30,723 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 923 transitions. Word has length 94 [2022-11-20 21:10:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:30,724 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 923 transitions. [2022-11-20 21:10:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2022-11-20 21:10:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 923 transitions. [2022-11-20 21:10:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-20 21:10:30,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:30,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:30,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 21:10:30,726 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash 133861920, now seen corresponding path program 1 times [2022-11-20 21:10:30,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:30,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831690892] [2022-11-20 21:10:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:30,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:30,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:30,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831690892] [2022-11-20 21:10:30,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831690892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:30,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:30,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:10:30,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012513251] [2022-11-20 21:10:30,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:30,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:10:30,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:10:30,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:10:30,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:30,878 INFO L87 Difference]: Start difference. First operand 726 states and 923 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-11-20 21:10:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:31,225 INFO L93 Difference]: Finished difference Result 2011 states and 2596 transitions. [2022-11-20 21:10:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:10:31,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2022-11-20 21:10:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:31,231 INFO L225 Difference]: With dead ends: 2011 [2022-11-20 21:10:31,231 INFO L226 Difference]: Without dead ends: 1354 [2022-11-20 21:10:31,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:31,234 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 28 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 218 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 [2022-11-20 21:10:31,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 218 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:10:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-11-20 21:10:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1292. [2022-11-20 21:10:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 1.278853601859024) internal successors, (1651), 1291 states have internal predecessors, (1651), 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) [2022-11-20 21:10:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1651 transitions. [2022-11-20 21:10:31,532 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1651 transitions. Word has length 97 [2022-11-20 21:10:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:31,533 INFO L495 AbstractCegarLoop]: Abstraction has 1292 states and 1651 transitions. [2022-11-20 21:10:31,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-11-20 21:10:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1651 transitions. [2022-11-20 21:10:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 21:10:31,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:31,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:31,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 21:10:31,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash -145077870, now seen corresponding path program 1 times [2022-11-20 21:10:31,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:31,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856391634] [2022-11-20 21:10:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:31,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:31,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:10:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856391634] [2022-11-20 21:10:31,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856391634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:31,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:31,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:10:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652290363] [2022-11-20 21:10:31,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:31,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:10:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:10:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:10:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:31,675 INFO L87 Difference]: Start difference. First operand 1292 states and 1651 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) [2022-11-20 21:10:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:32,276 INFO L93 Difference]: Finished difference Result 3727 states and 4804 transitions. [2022-11-20 21:10:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:10:32,277 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 100 [2022-11-20 21:10:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:32,285 INFO L225 Difference]: With dead ends: 3727 [2022-11-20 21:10:32,285 INFO L226 Difference]: Without dead ends: 2504 [2022-11-20 21:10:32,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:32,288 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 23 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 207 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 [2022-11-20 21:10:32,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 207 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:10:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-11-20 21:10:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2394. [2022-11-20 21:10:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 1.2783117425825323) internal successors, (3059), 2393 states have internal predecessors, (3059), 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) [2022-11-20 21:10:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 3059 transitions. [2022-11-20 21:10:32,851 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 3059 transitions. Word has length 100 [2022-11-20 21:10:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:32,851 INFO L495 AbstractCegarLoop]: Abstraction has 2394 states and 3059 transitions. [2022-11-20 21:10:32,852 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) [2022-11-20 21:10:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 3059 transitions. [2022-11-20 21:10:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 21:10:32,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:32,854 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] [2022-11-20 21:10:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 21:10:32,854 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:10:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2038077190, now seen corresponding path program 1 times [2022-11-20 21:10:32,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:10:32,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353496207] [2022-11-20 21:10:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:10:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:11:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:11:29,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:11:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353496207] [2022-11-20 21:11:29,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353496207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:11:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782432817] [2022-11-20 21:11:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:11:29,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:11:29,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:11:29,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:11:29,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4b5b31-dc34-425a-b6b0-4ec201f39208/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:11:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:11:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-20 21:11:30,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:13:02,960 WARN L233 SmtUtils]: Spent 9.64s on a formula simplification. DAG size of input: 210 DAG size of output: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)