./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7 --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 c10298174dc8a10464920798633331c54bfb52691f05a28be9f9c0183eefe1d6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:43:49,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:43:49,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:43:49,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:43:49,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:43:49,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:43:49,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:43:49,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:43:49,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:43:49,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:43:49,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:43:49,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:43:49,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:43:49,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:43:49,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:43:49,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:43:49,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:43:49,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:43:49,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:43:49,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:43:49,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:43:49,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:43:49,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:43:49,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:43:49,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:43:49,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:43:49,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:43:49,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:43:49,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:43:49,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:43:49,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:43:49,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:43:49,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:43:49,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:43:49,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:43:49,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:43:49,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:43:49,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:43:49,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:43:49,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:43:49,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:43:49,128 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:43:49,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:43:49,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:43:49,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:43:49,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:43:49,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:43:49,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:43:49,156 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:43:49,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:43:49,157 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:43:49,157 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:43:49,157 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:43:49,160 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:43:49,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:43:49,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:43:49,161 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:43:49,162 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:43:49,162 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:43:49,162 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:43:49,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:43:49,163 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:43:49,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:43:49,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:43:49,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:43:49,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:43:49,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:43:49,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:43:49,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:43:49,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:43:49,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:43:49,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:43:49,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:43:49,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:43:49,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:43:49,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:43:49,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:43:49,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:43:49,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:43:49,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:43:49,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:43:49,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:43:49,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:43:49,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10298174dc8a10464920798633331c54bfb52691f05a28be9f9c0183eefe1d6 [2021-11-25 19:43:49,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:43:49,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:43:49,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:43:49,521 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:43:49,522 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:43:49,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2021-11-25 19:43:49,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/data/292161b74/b76d9e0e16044f1e95fa5b4ad4337a02/FLAGf3a6664b9 [2021-11-25 19:43:50,311 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:43:50,311 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2021-11-25 19:43:50,334 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/data/292161b74/b76d9e0e16044f1e95fa5b4ad4337a02/FLAGf3a6664b9 [2021-11-25 19:43:50,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/data/292161b74/b76d9e0e16044f1e95fa5b4ad4337a02 [2021-11-25 19:43:50,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:43:50,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:43:50,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:43:50,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:43:50,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:43:50,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:43:50" (1/1) ... [2021-11-25 19:43:50,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fac9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:50, skipping insertion in model container [2021-11-25 19:43:50,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:43:50" (1/1) ... [2021-11-25 19:43:50,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:43:50,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:43:51,137 WARN L230 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_27a29d80-6ef6-4f8a-a288-542fa3b81c61/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c[55979,55992] [2021-11-25 19:43:51,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:43:51,160 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:43:51,365 WARN L230 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_27a29d80-6ef6-4f8a-a288-542fa3b81c61/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c[55979,55992] [2021-11-25 19:43:51,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:43:51,387 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:43:51,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51 WrapperNode [2021-11-25 19:43:51,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:43:51,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:43:51,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:43:51,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:43:51,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,608 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2093 [2021-11-25 19:43:51,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:43:51,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:43:51,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:43:51,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:43:51,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:43:51,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:43:51,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:43:51,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:43:51,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (1/1) ... [2021-11-25 19:43:51,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:43:51,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:51,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:43:51,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:43:51,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:43:51,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:43:51,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:43:51,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:43:52,210 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:43:52,212 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:43:54,057 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:43:55,811 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:43:55,811 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:43:55,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:43:55 BoogieIcfgContainer [2021-11-25 19:43:55,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:43:55,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:43:55,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:43:55,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:43:55,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:43:50" (1/3) ... [2021-11-25 19:43:55,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d32a3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:43:55, skipping insertion in model container [2021-11-25 19:43:55,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:51" (2/3) ... [2021-11-25 19:43:55,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d32a3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:43:55, skipping insertion in model container [2021-11-25 19:43:55,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:43:55" (3/3) ... [2021-11-25 19:43:55,827 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2021-11-25 19:43:55,832 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:43:55,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:43:55,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:43:55,898 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:43:55,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:43:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 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) [2021-11-25 19:43:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 19:43:55,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:55,945 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:55,946 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:55,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1579587222, now seen corresponding path program 1 times [2021-11-25 19:43:55,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:55,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022188167] [2021-11-25 19:43:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:55,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:57,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:57,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022188167] [2021-11-25 19:43:57,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022188167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:57,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:43:57,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:43:57,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799078552] [2021-11-25 19:43:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:57,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:57,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:43:57,370 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 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 4 states, 4 states have (on average 31.5) internal successors, (126), 4 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) [2021-11-25 19:43:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:57,860 INFO L93 Difference]: Finished difference Result 480 states and 822 transitions. [2021-11-25 19:43:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:57,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 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) Word has length 126 [2021-11-25 19:43:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:57,890 INFO L225 Difference]: With dead ends: 480 [2021-11-25 19:43:57,890 INFO L226 Difference]: Without dead ends: 460 [2021-11-25 19:43:57,894 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:43:57,901 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 28 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:57,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1356 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:43:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-25 19:43:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2021-11-25 19:43:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 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) [2021-11-25 19:43:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2021-11-25 19:43:58,011 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2021-11-25 19:43:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:58,013 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2021-11-25 19:43:58,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 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) [2021-11-25 19:43:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2021-11-25 19:43:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 19:43:58,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:58,027 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:58,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:43:58,028 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:58,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1648849917, now seen corresponding path program 1 times [2021-11-25 19:43:58,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:58,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132474519] [2021-11-25 19:43:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:58,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:58,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:58,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132474519] [2021-11-25 19:43:58,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132474519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:58,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:43:58,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:43:58,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561355695] [2021-11-25 19:43:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:58,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:58,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:43:58,548 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2021-11-25 19:43:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:58,981 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2021-11-25 19:43:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:58,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2021-11-25 19:43:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:58,986 INFO L225 Difference]: With dead ends: 483 [2021-11-25 19:43:58,986 INFO L226 Difference]: Without dead ends: 462 [2021-11-25 19:43:58,987 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:43:58,988 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 26 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:58,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:43:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-25 19:43:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-25 19:43:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 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) [2021-11-25 19:43:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2021-11-25 19:43:59,018 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2021-11-25 19:43:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:59,024 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2021-11-25 19:43:59,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2021-11-25 19:43:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2021-11-25 19:43:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 19:43:59,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:59,034 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:59,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:43:59,035 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash -493522081, now seen corresponding path program 1 times [2021-11-25 19:43:59,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:59,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528207725] [2021-11-25 19:43:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:59,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:59,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:59,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528207725] [2021-11-25 19:43:59,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528207725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:59,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:43:59,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:43:59,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6823039] [2021-11-25 19:43:59,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:59,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:59,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:43:59,353 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-11-25 19:43:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:59,679 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2021-11-25 19:43:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:59,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 128 [2021-11-25 19:43:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:59,683 INFO L225 Difference]: With dead ends: 483 [2021-11-25 19:43:59,683 INFO L226 Difference]: Without dead ends: 462 [2021-11-25 19:43:59,684 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:43:59,688 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 24 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:59,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:43:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-25 19:43:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-25 19:43:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 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) [2021-11-25 19:43:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2021-11-25 19:43:59,714 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2021-11-25 19:43:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:59,716 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2021-11-25 19:43:59,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-11-25 19:43:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2021-11-25 19:43:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 19:43:59,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:59,720 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:59,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:43:59,722 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:59,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1817874470, now seen corresponding path program 1 times [2021-11-25 19:43:59,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:59,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150660104] [2021-11-25 19:43:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:59,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:00,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:00,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150660104] [2021-11-25 19:44:00,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150660104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:00,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:00,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:44:00,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281385693] [2021-11-25 19:44:00,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:00,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:44:00,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:00,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:44:00,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:44:00,125 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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) [2021-11-25 19:44:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:00,473 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2021-11-25 19:44:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:44:00,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 129 [2021-11-25 19:44:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:00,479 INFO L225 Difference]: With dead ends: 483 [2021-11-25 19:44:00,479 INFO L226 Difference]: Without dead ends: 462 [2021-11-25 19:44:00,480 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:44:00,484 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 22 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:00,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:44:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-25 19:44:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-25 19:44:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 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) [2021-11-25 19:44:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2021-11-25 19:44:00,505 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2021-11-25 19:44:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:00,505 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2021-11-25 19:44:00,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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) [2021-11-25 19:44:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2021-11-25 19:44:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 19:44:00,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:00,507 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:00,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:44:00,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash 462175272, now seen corresponding path program 1 times [2021-11-25 19:44:00,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:00,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48729714] [2021-11-25 19:44:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:00,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:00,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:00,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48729714] [2021-11-25 19:44:00,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48729714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:00,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:00,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:44:00,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015754691] [2021-11-25 19:44:00,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:00,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:44:00,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:00,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:44:00,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:44:00,789 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2021-11-25 19:44:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:01,039 INFO L93 Difference]: Finished difference Result 483 states and 816 transitions. [2021-11-25 19:44:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:44:01,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 130 [2021-11-25 19:44:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:01,043 INFO L225 Difference]: With dead ends: 483 [2021-11-25 19:44:01,043 INFO L226 Difference]: Without dead ends: 462 [2021-11-25 19:44:01,044 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:44:01,051 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 20 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:01,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1372 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:44:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-25 19:44:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-25 19:44:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 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) [2021-11-25 19:44:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2021-11-25 19:44:01,071 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2021-11-25 19:44:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:01,071 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2021-11-25 19:44:01,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2021-11-25 19:44:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2021-11-25 19:44:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 19:44:01,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:01,077 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:01,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:44:01,077 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:01,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1390624847, now seen corresponding path program 1 times [2021-11-25 19:44:01,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:01,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070307595] [2021-11-25 19:44:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:01,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:01,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:01,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070307595] [2021-11-25 19:44:01,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070307595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:01,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:01,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:44:01,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301690845] [2021-11-25 19:44:01,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:01,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:44:01,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:44:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:44:01,420 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2021-11-25 19:44:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:01,679 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2021-11-25 19:44:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:44:01,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 131 [2021-11-25 19:44:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:01,683 INFO L225 Difference]: With dead ends: 483 [2021-11-25 19:44:01,683 INFO L226 Difference]: Without dead ends: 462 [2021-11-25 19:44:01,683 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:44:01,684 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 18 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:01,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1371 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:44:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-25 19:44:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-25 19:44:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 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) [2021-11-25 19:44:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2021-11-25 19:44:01,699 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2021-11-25 19:44:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:01,700 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2021-11-25 19:44:01,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2021-11-25 19:44:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2021-11-25 19:44:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 19:44:01,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:01,703 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:01,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:44:01,703 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash -823521129, now seen corresponding path program 1 times [2021-11-25 19:44:01,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517358535] [2021-11-25 19:44:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:01,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:02,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:02,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517358535] [2021-11-25 19:44:02,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517358535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:02,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:02,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:44:02,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117333265] [2021-11-25 19:44:02,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:02,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:44:02,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:44:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:44:02,144 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-11-25 19:44:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:02,434 INFO L93 Difference]: Finished difference Result 481 states and 811 transitions. [2021-11-25 19:44:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:44:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133 [2021-11-25 19:44:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:02,439 INFO L225 Difference]: With dead ends: 481 [2021-11-25 19:44:02,439 INFO L226 Difference]: Without dead ends: 460 [2021-11-25 19:44:02,439 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:44:02,440 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 15 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:02,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1362 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:44:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-25 19:44:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2021-11-25 19:44:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 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) [2021-11-25 19:44:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions. [2021-11-25 19:44:02,495 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133 [2021-11-25 19:44:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:02,496 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 765 transitions. [2021-11-25 19:44:02,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-11-25 19:44:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions. [2021-11-25 19:44:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 19:44:02,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:02,499 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:02,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:44:02,500 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:02,501 INFO L85 PathProgramCache]: Analyzing trace with hash 152546015, now seen corresponding path program 1 times [2021-11-25 19:44:02,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:02,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44177601] [2021-11-25 19:44:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:02,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:04,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44177601] [2021-11-25 19:44:04,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44177601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:04,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:04,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:44:04,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785035479] [2021-11-25 19:44:04,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:04,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:44:04,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:04,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:44:04,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:44:04,138 INFO L87 Difference]: Start difference. First operand 451 states and 765 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2021-11-25 19:44:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:04,502 INFO L93 Difference]: Finished difference Result 482 states and 812 transitions. [2021-11-25 19:44:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:44:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 134 [2021-11-25 19:44:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:04,506 INFO L225 Difference]: With dead ends: 482 [2021-11-25 19:44:04,506 INFO L226 Difference]: Without dead ends: 461 [2021-11-25 19:44:04,506 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:44:04,507 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 12 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:04,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2046 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:44:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-25 19:44:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2021-11-25 19:44:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 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) [2021-11-25 19:44:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2021-11-25 19:44:04,527 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134 [2021-11-25 19:44:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:04,528 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2021-11-25 19:44:04,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2021-11-25 19:44:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2021-11-25 19:44:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-25 19:44:04,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:04,531 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:04,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:44:04,532 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:04,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2075997541, now seen corresponding path program 1 times [2021-11-25 19:44:04,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:04,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267515672] [2021-11-25 19:44:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:04,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:05,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:05,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267515672] [2021-11-25 19:44:05,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267515672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:05,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:05,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:44:05,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684309197] [2021-11-25 19:44:05,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:05,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:44:05,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:44:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:44:05,752 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-11-25 19:44:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:06,005 INFO L93 Difference]: Finished difference Result 482 states and 809 transitions. [2021-11-25 19:44:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:44:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 136 [2021-11-25 19:44:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:06,009 INFO L225 Difference]: With dead ends: 482 [2021-11-25 19:44:06,009 INFO L226 Difference]: Without dead ends: 461 [2021-11-25 19:44:06,010 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:44:06,010 INFO L933 BasicCegarLoop]: 681 mSDtfsCounter, 7 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:06,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1365 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:44:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-25 19:44:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454. [2021-11-25 19:44:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 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) [2021-11-25 19:44:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions. [2021-11-25 19:44:06,033 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136 [2021-11-25 19:44:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:06,034 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 767 transitions. [2021-11-25 19:44:06,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-11-25 19:44:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions. [2021-11-25 19:44:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 19:44:06,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:06,037 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:06,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:44:06,037 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash -77444371, now seen corresponding path program 1 times [2021-11-25 19:44:06,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:06,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96387808] [2021-11-25 19:44:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:06,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:06,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:06,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96387808] [2021-11-25 19:44:06,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96387808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:06,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:06,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:44:06,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413423758] [2021-11-25 19:44:06,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:06,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:44:06,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:06,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:44:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:44:06,274 INFO L87 Difference]: Start difference. First operand 454 states and 767 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2021-11-25 19:44:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:06,744 INFO L93 Difference]: Finished difference Result 505 states and 847 transitions. [2021-11-25 19:44:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:44:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 137 [2021-11-25 19:44:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:06,749 INFO L225 Difference]: With dead ends: 505 [2021-11-25 19:44:06,749 INFO L226 Difference]: Without dead ends: 484 [2021-11-25 19:44:06,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:44:06,752 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 46 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:06,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 2754 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:44:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-25 19:44:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2021-11-25 19:44:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 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) [2021-11-25 19:44:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions. [2021-11-25 19:44:06,775 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137 [2021-11-25 19:44:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:06,776 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 769 transitions. [2021-11-25 19:44:06,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2021-11-25 19:44:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions. [2021-11-25 19:44:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 19:44:06,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:06,803 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:06,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:44:06,803 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1324935855, now seen corresponding path program 1 times [2021-11-25 19:44:06,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:06,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683224932] [2021-11-25 19:44:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:06,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:16,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683224932] [2021-11-25 19:44:16,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683224932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:44:16,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167192320] [2021-11-25 19:44:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:16,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:44:16,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:44:16,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:44:16,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a29d80-6ef6-4f8a-a288-542fa3b81c61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:44:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:44:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:13,917 INFO L328 TraceCheckSpWp]: Computing backward predicates...