./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur --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 3af6b76c8112c46f4f3f430659495baba58dab9f6300080b3889ede952fb5526 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:14:13,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:14:13,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:14:13,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:14:13,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:14:13,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:14:13,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:14:13,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:14:13,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:14:13,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:14:13,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:14:13,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:14:13,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:14:13,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:14:13,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:14:13,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:14:13,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:14:13,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:14:13,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:14:13,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:14:13,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:14:13,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:14:13,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:14:13,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:14:13,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:14:13,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:14:13,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:14:13,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:14:13,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:14:13,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:14:13,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:14:13,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:14:13,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:14:13,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:14:13,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:14:13,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:14:13,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:14:13,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:14:13,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:14:13,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:14:13,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:14:13,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:14:13,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:14:13,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:14:13,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:14:13,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:14:13,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:14:13,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:14:13,231 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:14:13,231 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:14:13,231 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:14:13,232 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:14:13,233 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:14:13,233 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:14:13,233 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:14:13,233 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:14:13,234 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:14:13,234 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:14:13,234 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:14:13,235 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:14:13,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:14:13,236 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:14:13,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:14:13,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:14:13,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:14:13,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:14:13,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:14:13,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:14:13,239 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:14:13,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:14:13,239 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:14:13,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:14:13,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:14:13,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:14:13,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:14:13,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:14:13,241 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:14:13,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:14:13,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:14:13,242 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:14:13,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:14:13,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:14:13,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:14:13,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3af6b76c8112c46f4f3f430659495baba58dab9f6300080b3889ede952fb5526 [2022-11-26 00:14:13,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:14:13,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:14:13,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:14:13,619 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:14:13,620 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:14:13,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-26 00:14:16,760 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:14:16,962 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:14:16,962 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-26 00:14:16,972 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/data/d717ed3b7/44831f3ea02a41ec8220a7455e2b0937/FLAGce0c7ec02 [2022-11-26 00:14:16,986 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/data/d717ed3b7/44831f3ea02a41ec8220a7455e2b0937 [2022-11-26 00:14:16,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:14:16,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:14:16,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:14:16,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:14:17,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:14:17,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:14:16" (1/1) ... [2022-11-26 00:14:17,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdee90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17, skipping insertion in model container [2022-11-26 00:14:17,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:14:16" (1/1) ... [2022-11-26 00:14:17,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:14:17,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:14:17,417 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2022-11-26 00:14:17,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:14:17,503 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:14:17,578 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2022-11-26 00:14:17,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:14:17,615 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:14:17,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17 WrapperNode [2022-11-26 00:14:17,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:14:17,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:14:17,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:14:17,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:14:17,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,700 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 617 [2022-11-26 00:14:17,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:14:17,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:14:17,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:14:17,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:14:17,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:14:17,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:14:17,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:14:17,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:14:17,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (1/1) ... [2022-11-26 00:14:17,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:14:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:17,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:14:17,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:14:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:14:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:14:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:14:17,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:14:18,054 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:14:18,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:14:18,609 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:14:19,044 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:14:19,045 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:14:19,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:14:19 BoogieIcfgContainer [2022-11-26 00:14:19,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:14:19,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:14:19,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:14:19,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:14:19,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:14:16" (1/3) ... [2022-11-26 00:14:19,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3f4b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:14:19, skipping insertion in model container [2022-11-26 00:14:19,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:17" (2/3) ... [2022-11-26 00:14:19,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3f4b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:14:19, skipping insertion in model container [2022-11-26 00:14:19,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:14:19" (3/3) ... [2022-11-26 00:14:19,067 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-26 00:14:19,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:14:19,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:14:19,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:14:19,139 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@72066da5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:14:19,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:14:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 90 states have (on average 1.7444444444444445) internal successors, (157), 91 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:14:19,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:19,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:19,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:19,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1672882808, now seen corresponding path program 1 times [2022-11-26 00:14:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:19,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201361280] [2022-11-26 00:14:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:19,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:19,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:19,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201361280] [2022-11-26 00:14:19,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201361280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:19,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:19,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:19,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843687241] [2022-11-26 00:14:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:19,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:19,614 INFO L87 Difference]: Start difference. First operand has 92 states, 90 states have (on average 1.7444444444444445) internal successors, (157), 91 states have internal predecessors, (157), 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 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:19,771 INFO L93 Difference]: Finished difference Result 210 states and 346 transitions. [2022-11-26 00:14:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2022-11-26 00:14:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:19,786 INFO L225 Difference]: With dead ends: 210 [2022-11-26 00:14:19,787 INFO L226 Difference]: Without dead ends: 140 [2022-11-26 00:14:19,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:19,794 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 108 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:19,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 336 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:19,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-26 00:14:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-11-26 00:14:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.5255474452554745) internal successors, (209), 137 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 209 transitions. [2022-11-26 00:14:19,880 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 209 transitions. Word has length 37 [2022-11-26 00:14:19,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:19,881 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 209 transitions. [2022-11-26 00:14:19,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 209 transitions. [2022-11-26 00:14:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:14:19,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:19,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:19,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:14:19,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash -412365627, now seen corresponding path program 1 times [2022-11-26 00:14:19,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:19,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595230083] [2022-11-26 00:14:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:19,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:20,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:20,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595230083] [2022-11-26 00:14:20,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595230083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:20,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:20,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:20,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797580135] [2022-11-26 00:14:20,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:20,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:20,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:20,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:20,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:20,150 INFO L87 Difference]: Start difference. First operand 138 states and 209 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:20,319 INFO L93 Difference]: Finished difference Result 315 states and 496 transitions. [2022-11-26 00:14:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:20,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2022-11-26 00:14:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:20,322 INFO L225 Difference]: With dead ends: 315 [2022-11-26 00:14:20,322 INFO L226 Difference]: Without dead ends: 203 [2022-11-26 00:14:20,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:20,324 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 95 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:20,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 219 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-26 00:14:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2022-11-26 00:14:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.54) internal successors, (308), 200 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 308 transitions. [2022-11-26 00:14:20,355 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 308 transitions. Word has length 39 [2022-11-26 00:14:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:20,356 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 308 transitions. [2022-11-26 00:14:20,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 308 transitions. [2022-11-26 00:14:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:14:20,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:20,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:20,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:14:20,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:20,359 INFO L85 PathProgramCache]: Analyzing trace with hash 393608966, now seen corresponding path program 1 times [2022-11-26 00:14:20,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431834224] [2022-11-26 00:14:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:20,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:20,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431834224] [2022-11-26 00:14:20,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431834224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:20,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:20,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546407286] [2022-11-26 00:14:20,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:20,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:20,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:20,462 INFO L87 Difference]: Start difference. First operand 201 states and 308 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:20,541 INFO L93 Difference]: Finished difference Result 505 states and 799 transitions. [2022-11-26 00:14:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:20,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-11-26 00:14:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:20,544 INFO L225 Difference]: With dead ends: 505 [2022-11-26 00:14:20,545 INFO L226 Difference]: Without dead ends: 332 [2022-11-26 00:14:20,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:20,547 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 95 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:20,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 264 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-26 00:14:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2022-11-26 00:14:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.5653495440729484) internal successors, (515), 329 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 515 transitions. [2022-11-26 00:14:20,588 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 515 transitions. Word has length 41 [2022-11-26 00:14:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:20,589 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 515 transitions. [2022-11-26 00:14:20,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 515 transitions. [2022-11-26 00:14:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:14:20,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:20,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:20,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:14:20,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:20,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1940883160, now seen corresponding path program 1 times [2022-11-26 00:14:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129324032] [2022-11-26 00:14:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:20,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:20,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129324032] [2022-11-26 00:14:20,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129324032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:20,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:20,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:20,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911222191] [2022-11-26 00:14:20,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:20,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:20,698 INFO L87 Difference]: Start difference. First operand 330 states and 515 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:20,786 INFO L93 Difference]: Finished difference Result 821 states and 1306 transitions. [2022-11-26 00:14:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2022-11-26 00:14:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:20,789 INFO L225 Difference]: With dead ends: 821 [2022-11-26 00:14:20,790 INFO L226 Difference]: Without dead ends: 519 [2022-11-26 00:14:20,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:20,803 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 94 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:20,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 235 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-26 00:14:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2022-11-26 00:14:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.5794573643410852) internal successors, (815), 516 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 815 transitions. [2022-11-26 00:14:20,880 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 815 transitions. Word has length 43 [2022-11-26 00:14:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:20,882 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 815 transitions. [2022-11-26 00:14:20,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 815 transitions. [2022-11-26 00:14:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:14:20,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:20,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:20,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:14:20,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1390561129, now seen corresponding path program 1 times [2022-11-26 00:14:20,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:20,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508512870] [2022-11-26 00:14:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:20,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:20,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508512870] [2022-11-26 00:14:20,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508512870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:20,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:20,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:20,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517999240] [2022-11-26 00:14:20,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:20,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:20,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:20,995 INFO L87 Difference]: Start difference. First operand 517 states and 815 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:21,150 INFO L93 Difference]: Finished difference Result 1337 states and 2134 transitions. [2022-11-26 00:14:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 45 [2022-11-26 00:14:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:21,155 INFO L225 Difference]: With dead ends: 1337 [2022-11-26 00:14:21,156 INFO L226 Difference]: Without dead ends: 864 [2022-11-26 00:14:21,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:21,158 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 89 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:21,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 240 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-11-26 00:14:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 862. [2022-11-26 00:14:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.5807200929152148) internal successors, (1361), 861 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1361 transitions. [2022-11-26 00:14:21,268 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1361 transitions. Word has length 45 [2022-11-26 00:14:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:21,270 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1361 transitions. [2022-11-26 00:14:21,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1361 transitions. [2022-11-26 00:14:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 00:14:21,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:21,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:21,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:14:21,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash 610473804, now seen corresponding path program 1 times [2022-11-26 00:14:21,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:21,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103420432] [2022-11-26 00:14:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:21,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:21,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:21,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103420432] [2022-11-26 00:14:21,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103420432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:21,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:21,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040609499] [2022-11-26 00:14:21,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:21,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:21,357 INFO L87 Difference]: Start difference. First operand 862 states and 1361 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:21,549 INFO L93 Difference]: Finished difference Result 2169 states and 3457 transitions. [2022-11-26 00:14:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2022-11-26 00:14:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:21,555 INFO L225 Difference]: With dead ends: 2169 [2022-11-26 00:14:21,556 INFO L226 Difference]: Without dead ends: 1351 [2022-11-26 00:14:21,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:21,558 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:21,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 237 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-11-26 00:14:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2022-11-26 00:14:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 1.586053412462908) internal successors, (2138), 1348 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 2138 transitions. [2022-11-26 00:14:21,715 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 2138 transitions. Word has length 47 [2022-11-26 00:14:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:21,715 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 2138 transitions. [2022-11-26 00:14:21,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 2138 transitions. [2022-11-26 00:14:21,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:14:21,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:21,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:21,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:14:21,718 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1645647027, now seen corresponding path program 1 times [2022-11-26 00:14:21,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:21,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742576464] [2022-11-26 00:14:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:21,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:21,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742576464] [2022-11-26 00:14:21,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742576464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:21,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:21,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:14:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110966377] [2022-11-26 00:14:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:14:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:14:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:21,886 INFO L87 Difference]: Start difference. First operand 1349 states and 2138 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:22,442 INFO L93 Difference]: Finished difference Result 3437 states and 5465 transitions. [2022-11-26 00:14:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:14:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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 49 [2022-11-26 00:14:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:22,453 INFO L225 Difference]: With dead ends: 3437 [2022-11-26 00:14:22,453 INFO L226 Difference]: Without dead ends: 2148 [2022-11-26 00:14:22,455 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:14:22,456 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 549 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:22,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 935 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:14:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2022-11-26 00:14:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2138. [2022-11-26 00:14:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5779129620963968) internal successors, (3372), 2137 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3372 transitions. [2022-11-26 00:14:22,752 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3372 transitions. Word has length 49 [2022-11-26 00:14:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:22,752 INFO L495 AbstractCegarLoop]: Abstraction has 2138 states and 3372 transitions. [2022-11-26 00:14:22,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3372 transitions. [2022-11-26 00:14:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:14:22,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:22,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:22,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:14:22,754 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 462045524, now seen corresponding path program 1 times [2022-11-26 00:14:22,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:22,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236406882] [2022-11-26 00:14:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:22,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:22,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236406882] [2022-11-26 00:14:22,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236406882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:22,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:22,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:14:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186529717] [2022-11-26 00:14:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:22,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:14:22,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:22,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:14:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:14:22,834 INFO L87 Difference]: Start difference. First operand 2138 states and 3372 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:23,153 INFO L93 Difference]: Finished difference Result 4218 states and 6669 transitions. [2022-11-26 00:14:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:14:23,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2022-11-26 00:14:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:23,161 INFO L225 Difference]: With dead ends: 4218 [2022-11-26 00:14:23,161 INFO L226 Difference]: Without dead ends: 2140 [2022-11-26 00:14:23,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:23,165 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 182 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:23,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 329 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-11-26 00:14:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2022-11-26 00:14:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5722976134768367) internal successors, (3360), 2137 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3360 transitions. [2022-11-26 00:14:23,416 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3360 transitions. Word has length 50 [2022-11-26 00:14:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:23,416 INFO L495 AbstractCegarLoop]: Abstraction has 2138 states and 3360 transitions. [2022-11-26 00:14:23,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3360 transitions. [2022-11-26 00:14:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-26 00:14:23,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:23,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:23,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:14:23,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:23,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1380563188, now seen corresponding path program 1 times [2022-11-26 00:14:23,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:23,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142791962] [2022-11-26 00:14:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:23,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:23,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:23,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142791962] [2022-11-26 00:14:23,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142791962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:23,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:23,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:14:23,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074322161] [2022-11-26 00:14:23,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:23,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:14:23,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:23,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:14:23,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:14:23,497 INFO L87 Difference]: Start difference. First operand 2138 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:23,855 INFO L93 Difference]: Finished difference Result 4218 states and 6645 transitions. [2022-11-26 00:14:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:14:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2022-11-26 00:14:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:23,863 INFO L225 Difference]: With dead ends: 4218 [2022-11-26 00:14:23,863 INFO L226 Difference]: Without dead ends: 2140 [2022-11-26 00:14:23,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:23,867 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 190 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:23,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 335 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-11-26 00:14:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2022-11-26 00:14:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5666822648572765) internal successors, (3348), 2137 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3348 transitions. [2022-11-26 00:14:24,140 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3348 transitions. Word has length 51 [2022-11-26 00:14:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:24,141 INFO L495 AbstractCegarLoop]: Abstraction has 2138 states and 3348 transitions. [2022-11-26 00:14:24,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3348 transitions. [2022-11-26 00:14:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:14:24,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:24,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:24,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:14:24,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -205602277, now seen corresponding path program 1 times [2022-11-26 00:14:24,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:24,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958336724] [2022-11-26 00:14:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:24,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:24,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958336724] [2022-11-26 00:14:24,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958336724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:24,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:24,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:14:24,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818782590] [2022-11-26 00:14:24,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:24,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:14:24,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:14:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:14:24,249 INFO L87 Difference]: Start difference. First operand 2138 states and 3348 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:24,575 INFO L93 Difference]: Finished difference Result 4218 states and 6621 transitions. [2022-11-26 00:14:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:14:24,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 52 [2022-11-26 00:14:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:24,584 INFO L225 Difference]: With dead ends: 4218 [2022-11-26 00:14:24,584 INFO L226 Difference]: Without dead ends: 2140 [2022-11-26 00:14:24,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:24,587 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 188 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:24,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 338 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-11-26 00:14:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2022-11-26 00:14:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5610669162377164) internal successors, (3336), 2137 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3336 transitions. [2022-11-26 00:14:24,847 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3336 transitions. Word has length 52 [2022-11-26 00:14:24,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:24,848 INFO L495 AbstractCegarLoop]: Abstraction has 2138 states and 3336 transitions. [2022-11-26 00:14:24,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3336 transitions. [2022-11-26 00:14:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:14:24,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:24,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:24,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:14:24,850 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1532603956, now seen corresponding path program 1 times [2022-11-26 00:14:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:24,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699135844] [2022-11-26 00:14:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:25,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:25,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699135844] [2022-11-26 00:14:25,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699135844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:25,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:25,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:14:25,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155437687] [2022-11-26 00:14:25,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:25,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:14:25,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:14:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:25,099 INFO L87 Difference]: Start difference. First operand 2138 states and 3336 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:25,518 INFO L93 Difference]: Finished difference Result 4218 states and 6597 transitions. [2022-11-26 00:14:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:14:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 54 [2022-11-26 00:14:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:25,527 INFO L225 Difference]: With dead ends: 4218 [2022-11-26 00:14:25,527 INFO L226 Difference]: Without dead ends: 2140 [2022-11-26 00:14:25,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:14:25,531 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 223 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:25,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 324 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-11-26 00:14:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2022-11-26 00:14:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.557323350491343) internal successors, (3328), 2137 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3328 transitions. [2022-11-26 00:14:25,789 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3328 transitions. Word has length 54 [2022-11-26 00:14:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:25,789 INFO L495 AbstractCegarLoop]: Abstraction has 2138 states and 3328 transitions. [2022-11-26 00:14:25,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3328 transitions. [2022-11-26 00:14:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:14:25,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:25,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:25,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:14:25,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash -55680634, now seen corresponding path program 1 times [2022-11-26 00:14:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:25,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83230947] [2022-11-26 00:14:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:25,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:26,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:26,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83230947] [2022-11-26 00:14:26,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83230947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:26,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:26,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:14:26,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239749285] [2022-11-26 00:14:26,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:14:26,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:26,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:14:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:26,011 INFO L87 Difference]: Start difference. First operand 2138 states and 3328 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:26,548 INFO L93 Difference]: Finished difference Result 5390 states and 8383 transitions. [2022-11-26 00:14:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:14:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 57 [2022-11-26 00:14:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:26,562 INFO L225 Difference]: With dead ends: 5390 [2022-11-26 00:14:26,562 INFO L226 Difference]: Without dead ends: 3312 [2022-11-26 00:14:26,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:14:26,566 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 220 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:26,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 343 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2022-11-26 00:14:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3310. [2022-11-26 00:14:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3309 states have (on average 1.5466908431550317) internal successors, (5118), 3309 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 5118 transitions. [2022-11-26 00:14:26,924 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 5118 transitions. Word has length 57 [2022-11-26 00:14:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:26,925 INFO L495 AbstractCegarLoop]: Abstraction has 3310 states and 5118 transitions. [2022-11-26 00:14:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 5118 transitions. [2022-11-26 00:14:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-26 00:14:26,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:26,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:14:26,926 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1715288194, now seen corresponding path program 1 times [2022-11-26 00:14:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:26,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146201301] [2022-11-26 00:14:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:27,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:27,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146201301] [2022-11-26 00:14:27,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146201301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:27,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:27,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:14:27,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332805249] [2022-11-26 00:14:27,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:14:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:14:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:14:27,328 INFO L87 Difference]: Start difference. First operand 3310 states and 5118 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:28,072 INFO L93 Difference]: Finished difference Result 4044 states and 6217 transitions. [2022-11-26 00:14:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:14:28,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 58 [2022-11-26 00:14:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:28,087 INFO L225 Difference]: With dead ends: 4044 [2022-11-26 00:14:28,087 INFO L226 Difference]: Without dead ends: 4042 [2022-11-26 00:14:28,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:14:28,089 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 257 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:28,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 885 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2022-11-26 00:14:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 3316. [2022-11-26 00:14:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 1.5438914027149322) internal successors, (5118), 3315 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 5118 transitions. [2022-11-26 00:14:28,449 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 5118 transitions. Word has length 58 [2022-11-26 00:14:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:28,449 INFO L495 AbstractCegarLoop]: Abstraction has 3316 states and 5118 transitions. [2022-11-26 00:14:28,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 5118 transitions. [2022-11-26 00:14:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:14:28,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:28,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:28,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:14:28,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1635534985, now seen corresponding path program 1 times [2022-11-26 00:14:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:28,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034366852] [2022-11-26 00:14:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:14:29,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034366852] [2022-11-26 00:14:29,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034366852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988443500] [2022-11-26 00:14:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:29,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:29,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:29,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1af78d2-a07c-4933-b120-545536493e94/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:14:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:29,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:14:29,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:14:31,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:36,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988443500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:36,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762316274] [2022-11-26 00:14:36,311 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-11-26 00:14:36,311 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:36,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:36,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:36,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:36,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:36,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:14:36,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:36,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:36,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:14:36,839 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:14:45,586 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:28:21,958 WARN L233 SmtUtils]: Spent 12.51s on a formula simplification that was a NOOP. DAG size: 505 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:28:39,125 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification that was a NOOP. DAG size: 484 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)