./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba --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 351e3bc8fe69313dfbfbeaf7f37de5791a1bf381bb5ef0945347e83cb39fb485 --- 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-b5237d8 [2022-11-22 00:25:07,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:25:07,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:25:07,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:25:07,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:25:07,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:25:07,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:25:07,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:25:07,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:25:07,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:25:07,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:25:07,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:25:07,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:25:07,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:25:07,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:25:07,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:25:07,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:25:07,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:25:07,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:25:07,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:25:07,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:25:07,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:25:07,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:25:07,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:25:07,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:25:07,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:25:07,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:25:07,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:25:07,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:25:07,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:25:07,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:25:07,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:25:07,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:25:07,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:25:07,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:25:07,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:25:07,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:25:07,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:25:07,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:25:07,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:25:07,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:25:07,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:25:07,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:25:07,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:25:07,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:25:07,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:25:07,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:25:07,175 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:25:07,175 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:25:07,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:25:07,175 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:25:07,176 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:25:07,177 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:25:07,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:25:07,177 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:25:07,178 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:25:07,178 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:25:07,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:25:07,178 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:25:07,178 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:25:07,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:25:07,179 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:25:07,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:25:07,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:25:07,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:25:07,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:25:07,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:25:07,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:25:07,181 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:25:07,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:25:07,182 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:25:07,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:25:07,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:25:07,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:25:07,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:25:07,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:25:07,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:25:07,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:25:07,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:25:07,184 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:25:07,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:25:07,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:25:07,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:25:07,185 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_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 351e3bc8fe69313dfbfbeaf7f37de5791a1bf381bb5ef0945347e83cb39fb485 [2022-11-22 00:25:07,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:25:07,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:25:07,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:25:07,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:25:07,526 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:25:07,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-11-22 00:25:10,677 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:25:10,963 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:25:10,964 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-11-22 00:25:10,982 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/data/bd9d0cef2/d912029968fc479f9ea0b0bcac47a83e/FLAG73febcb5f [2022-11-22 00:25:11,001 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/data/bd9d0cef2/d912029968fc479f9ea0b0bcac47a83e [2022-11-22 00:25:11,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:25:11,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:25:11,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:25:11,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:25:11,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:25:11,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ad023a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11, skipping insertion in model container [2022-11-22 00:25:11,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:25:11,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:25:11,355 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_9311f9a4-680f-4df2-88be-c506fc68dd85/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[11101,11114] [2022-11-22 00:25:11,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:25:11,484 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:25:11,571 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_9311f9a4-680f-4df2-88be-c506fc68dd85/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[11101,11114] [2022-11-22 00:25:11,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:25:11,656 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:25:11,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11 WrapperNode [2022-11-22 00:25:11,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:25:11,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:25:11,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:25:11,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:25:11,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,776 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1107 [2022-11-22 00:25:11,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:25:11,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:25:11,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:25:11,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:25:11,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:25:11,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:25:11,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:25:11,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:25:11,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (1/1) ... [2022-11-22 00:25:11,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:25:11,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:25:11,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:25:11,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9311f9a4-680f-4df2-88be-c506fc68dd85/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:25:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:25:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:25:11,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:25:11,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:25:12,233 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:25:12,235 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:25:13,184 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:25:13,808 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:25:13,809 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 00:25:13,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:25:13 BoogieIcfgContainer [2022-11-22 00:25:13,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:25:13,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:25:13,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:25:13,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:25:13,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:25:11" (1/3) ... [2022-11-22 00:25:13,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6da167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:25:13, skipping insertion in model container [2022-11-22 00:25:13,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:25:11" (2/3) ... [2022-11-22 00:25:13,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6da167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:25:13, skipping insertion in model container [2022-11-22 00:25:13,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:25:13" (3/3) ... [2022-11-22 00:25:13,833 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-11-22 00:25:13,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:25:13,853 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:25:13,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:25:13,919 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;@62bdfc54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:25:13,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:25:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 207 states have internal predecessors, (319), 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) [2022-11-22 00:25:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 00:25:13,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:13,936 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] [2022-11-22 00:25:13,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1527238198, now seen corresponding path program 1 times [2022-11-22 00:25:13,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:13,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811267785] [2022-11-22 00:25:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:13,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:15,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:15,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811267785] [2022-11-22 00:25:15,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811267785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:15,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:15,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:15,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960196975] [2022-11-22 00:25:15,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:15,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:25:15,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:15,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:25:15,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:15,157 INFO L87 Difference]: Start difference. First operand has 208 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 207 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-11-22 00:25:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:15,464 INFO L93 Difference]: Finished difference Result 518 states and 789 transitions. [2022-11-22 00:25:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:25:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2022-11-22 00:25:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:15,478 INFO L225 Difference]: With dead ends: 518 [2022-11-22 00:25:15,478 INFO L226 Difference]: Without dead ends: 319 [2022-11-22 00:25:15,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:15,489 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 225 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:15,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 767 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:25:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-22 00:25:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 317. [2022-11-22 00:25:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.5126582278481013) internal successors, (478), 316 states have internal predecessors, (478), 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) [2022-11-22 00:25:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2022-11-22 00:25:15,637 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 40 [2022-11-22 00:25:15,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:15,639 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2022-11-22 00:25:15,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-11-22 00:25:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2022-11-22 00:25:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 00:25:15,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:15,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:15,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:25:15,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:15,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1624166599, now seen corresponding path program 1 times [2022-11-22 00:25:15,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:15,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619197635] [2022-11-22 00:25:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:15,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:16,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:16,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619197635] [2022-11-22 00:25:16,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619197635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:16,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:16,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:16,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418343509] [2022-11-22 00:25:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:16,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:25:16,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:16,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:25:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:16,598 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 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) [2022-11-22 00:25:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:16,782 INFO L93 Difference]: Finished difference Result 793 states and 1196 transitions. [2022-11-22 00:25:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:25:16,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2022-11-22 00:25:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:16,785 INFO L225 Difference]: With dead ends: 793 [2022-11-22 00:25:16,786 INFO L226 Difference]: Without dead ends: 504 [2022-11-22 00:25:16,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:16,789 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 218 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:16,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 718 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-22 00:25:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2022-11-22 00:25:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.5069860279441119) internal successors, (755), 501 states have internal predecessors, (755), 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) [2022-11-22 00:25:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 755 transitions. [2022-11-22 00:25:16,839 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 755 transitions. Word has length 46 [2022-11-22 00:25:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:16,839 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 755 transitions. [2022-11-22 00:25:16,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 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) [2022-11-22 00:25:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 755 transitions. [2022-11-22 00:25:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 00:25:16,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:16,842 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] [2022-11-22 00:25:16,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:25:16,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash 84772929, now seen corresponding path program 1 times [2022-11-22 00:25:16,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132414510] [2022-11-22 00:25:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:17,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:17,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132414510] [2022-11-22 00:25:17,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132414510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:17,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:17,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:17,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419955818] [2022-11-22 00:25:17,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:17,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:25:17,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:25:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:17,528 INFO L87 Difference]: Start difference. First operand 502 states and 755 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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) [2022-11-22 00:25:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:17,704 INFO L93 Difference]: Finished difference Result 1261 states and 1895 transitions. [2022-11-22 00:25:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:25:17,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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 [2022-11-22 00:25:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:17,709 INFO L225 Difference]: With dead ends: 1261 [2022-11-22 00:25:17,709 INFO L226 Difference]: Without dead ends: 800 [2022-11-22 00:25:17,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:17,719 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 217 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:17,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 721 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-22 00:25:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 798. [2022-11-22 00:25:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 1.4981179422835633) internal successors, (1194), 797 states have internal predecessors, (1194), 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) [2022-11-22 00:25:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1194 transitions. [2022-11-22 00:25:17,811 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1194 transitions. Word has length 52 [2022-11-22 00:25:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:17,812 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1194 transitions. [2022-11-22 00:25:17,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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) [2022-11-22 00:25:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1194 transitions. [2022-11-22 00:25:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 00:25:17,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:17,817 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] [2022-11-22 00:25:17,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:25:17,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:17,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1115837971, now seen corresponding path program 1 times [2022-11-22 00:25:17,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:17,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495971866] [2022-11-22 00:25:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:17,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:18,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495971866] [2022-11-22 00:25:18,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495971866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:18,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:18,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:18,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691377354] [2022-11-22 00:25:18,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:25:18,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:25:18,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:18,683 INFO L87 Difference]: Start difference. First operand 798 states and 1194 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 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) [2022-11-22 00:25:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:18,947 INFO L93 Difference]: Finished difference Result 1988 states and 2966 transitions. [2022-11-22 00:25:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:25:18,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 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 [2022-11-22 00:25:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:18,953 INFO L225 Difference]: With dead ends: 1988 [2022-11-22 00:25:18,954 INFO L226 Difference]: Without dead ends: 1244 [2022-11-22 00:25:18,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:18,966 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 216 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:18,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 664 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2022-11-22 00:25:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1242. [2022-11-22 00:25:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 1.48348106365834) internal successors, (1841), 1241 states have internal predecessors, (1841), 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) [2022-11-22 00:25:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1841 transitions. [2022-11-22 00:25:19,124 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1841 transitions. Word has length 58 [2022-11-22 00:25:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:19,125 INFO L495 AbstractCegarLoop]: Abstraction has 1242 states and 1841 transitions. [2022-11-22 00:25:19,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 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) [2022-11-22 00:25:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1841 transitions. [2022-11-22 00:25:19,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 00:25:19,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:19,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:19,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:25:19,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1526384750, now seen corresponding path program 1 times [2022-11-22 00:25:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:19,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674706714] [2022-11-22 00:25:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:19,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:20,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:20,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674706714] [2022-11-22 00:25:20,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674706714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:20,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:20,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:20,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700324490] [2022-11-22 00:25:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:20,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:25:20,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:25:20,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:20,033 INFO L87 Difference]: Start difference. First operand 1242 states and 1841 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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) [2022-11-22 00:25:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:20,399 INFO L93 Difference]: Finished difference Result 3011 states and 4433 transitions. [2022-11-22 00:25:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:25:20,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2022-11-22 00:25:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:20,409 INFO L225 Difference]: With dead ends: 3011 [2022-11-22 00:25:20,410 INFO L226 Difference]: Without dead ends: 1836 [2022-11-22 00:25:20,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:20,413 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 215 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:20,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 604 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2022-11-22 00:25:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1834. [2022-11-22 00:25:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 1.4577195853791598) internal successors, (2672), 1833 states have internal predecessors, (2672), 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) [2022-11-22 00:25:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2672 transitions. [2022-11-22 00:25:20,746 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2672 transitions. Word has length 64 [2022-11-22 00:25:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:20,747 INFO L495 AbstractCegarLoop]: Abstraction has 1834 states and 2672 transitions. [2022-11-22 00:25:20,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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) [2022-11-22 00:25:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2672 transitions. [2022-11-22 00:25:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 00:25:20,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:20,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:20,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:25:20,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:20,759 INFO L85 PathProgramCache]: Analyzing trace with hash 100503792, now seen corresponding path program 1 times [2022-11-22 00:25:20,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:20,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605646483] [2022-11-22 00:25:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:21,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:21,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605646483] [2022-11-22 00:25:21,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605646483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:21,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:21,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:25:21,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422168417] [2022-11-22 00:25:21,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:21,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:25:21,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:25:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:25:21,173 INFO L87 Difference]: Start difference. First operand 1834 states and 2672 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:23,426 INFO L93 Difference]: Finished difference Result 9177 states and 13246 transitions. [2022-11-22 00:25:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:25:23,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-22 00:25:23,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:23,456 INFO L225 Difference]: With dead ends: 9177 [2022-11-22 00:25:23,456 INFO L226 Difference]: Without dead ends: 7404 [2022-11-22 00:25:23,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:25:23,462 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 1782 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:23,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1782 Valid, 1719 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:25:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7404 states. [2022-11-22 00:25:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7404 to 7396. [2022-11-22 00:25:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7395 states have (on average 1.4367816091954022) internal successors, (10625), 7395 states have internal predecessors, (10625), 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) [2022-11-22 00:25:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 10625 transitions. [2022-11-22 00:25:25,011 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 10625 transitions. Word has length 70 [2022-11-22 00:25:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:25,012 INFO L495 AbstractCegarLoop]: Abstraction has 7396 states and 10625 transitions. [2022-11-22 00:25:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 10625 transitions. [2022-11-22 00:25:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 00:25:25,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:25,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:25,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:25:25,061 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash -487776601, now seen corresponding path program 1 times [2022-11-22 00:25:25,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:25,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523954433] [2022-11-22 00:25:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:25,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:25,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523954433] [2022-11-22 00:25:25,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523954433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:25,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:25,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:25,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351269466] [2022-11-22 00:25:25,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:25,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:25:25,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:25:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:25:25,151 INFO L87 Difference]: Start difference. First operand 7396 states and 10625 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:27,809 INFO L93 Difference]: Finished difference Result 17997 states and 25789 transitions. [2022-11-22 00:25:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:25:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-22 00:25:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:27,854 INFO L225 Difference]: With dead ends: 17997 [2022-11-22 00:25:27,854 INFO L226 Difference]: Without dead ends: 12794 [2022-11-22 00:25:27,862 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 [2022-11-22 00:25:27,863 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 246 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:27,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 706 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12794 states. [2022-11-22 00:25:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12794 to 12792. [2022-11-22 00:25:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12792 states, 12791 states have (on average 1.4245954186537408) internal successors, (18222), 12791 states have internal predecessors, (18222), 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) [2022-11-22 00:25:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12792 states to 12792 states and 18222 transitions. [2022-11-22 00:25:30,299 INFO L78 Accepts]: Start accepts. Automaton has 12792 states and 18222 transitions. Word has length 72 [2022-11-22 00:25:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:30,301 INFO L495 AbstractCegarLoop]: Abstraction has 12792 states and 18222 transitions. [2022-11-22 00:25:30,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 12792 states and 18222 transitions. [2022-11-22 00:25:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 00:25:30,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:30,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:30,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:25:30,340 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:30,341 INFO L85 PathProgramCache]: Analyzing trace with hash 377835833, now seen corresponding path program 1 times [2022-11-22 00:25:30,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:30,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319748190] [2022-11-22 00:25:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:30,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:30,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319748190] [2022-11-22 00:25:30,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319748190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:30,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:30,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:30,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697323635] [2022-11-22 00:25:30,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:30,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:25:30,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:30,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:25:30,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:25:30,438 INFO L87 Difference]: Start difference. First operand 12792 states and 18222 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:33,664 INFO L93 Difference]: Finished difference Result 28111 states and 39907 transitions. [2022-11-22 00:25:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:25:33,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-22 00:25:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:33,715 INFO L225 Difference]: With dead ends: 28111 [2022-11-22 00:25:33,716 INFO L226 Difference]: Without dead ends: 20573 [2022-11-22 00:25:33,728 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 [2022-11-22 00:25:33,729 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 226 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:33,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 759 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:33,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2022-11-22 00:25:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 20571. [2022-11-22 00:25:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20571 states, 20570 states have (on average 1.411229946524064) internal successors, (29029), 20570 states have internal predecessors, (29029), 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) [2022-11-22 00:25:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20571 states to 20571 states and 29029 transitions. [2022-11-22 00:25:37,496 INFO L78 Accepts]: Start accepts. Automaton has 20571 states and 29029 transitions. Word has length 72 [2022-11-22 00:25:37,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:37,497 INFO L495 AbstractCegarLoop]: Abstraction has 20571 states and 29029 transitions. [2022-11-22 00:25:37,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 20571 states and 29029 transitions. [2022-11-22 00:25:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 00:25:37,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:37,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:37,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:25:37,550 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash 794222759, now seen corresponding path program 1 times [2022-11-22 00:25:37,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:37,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513990309] [2022-11-22 00:25:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:37,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:37,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513990309] [2022-11-22 00:25:37,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513990309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:37,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:37,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:37,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353927053] [2022-11-22 00:25:37,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:37,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:25:37,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:25:37,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:25:37,756 INFO L87 Difference]: Start difference. First operand 20571 states and 29029 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:41,837 INFO L93 Difference]: Finished difference Result 40087 states and 56271 transitions. [2022-11-22 00:25:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:25:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-22 00:25:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:41,929 INFO L225 Difference]: With dead ends: 40087 [2022-11-22 00:25:41,929 INFO L226 Difference]: Without dead ends: 30437 [2022-11-22 00:25:41,946 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 [2022-11-22 00:25:41,948 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 191 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:41,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 750 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30437 states. [2022-11-22 00:25:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30437 to 30435. [2022-11-22 00:25:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30435 states, 30434 states have (on average 1.395183018991917) internal successors, (42461), 30434 states have internal predecessors, (42461), 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) [2022-11-22 00:25:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30435 states to 30435 states and 42461 transitions. [2022-11-22 00:25:47,160 INFO L78 Accepts]: Start accepts. Automaton has 30435 states and 42461 transitions. Word has length 72 [2022-11-22 00:25:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:47,160 INFO L495 AbstractCegarLoop]: Abstraction has 30435 states and 42461 transitions. [2022-11-22 00:25:47,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 30435 states and 42461 transitions. [2022-11-22 00:25:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 00:25:47,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:47,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:47,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:25:47,219 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1905395513, now seen corresponding path program 1 times [2022-11-22 00:25:47,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:47,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773725033] [2022-11-22 00:25:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:47,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:47,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:47,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773725033] [2022-11-22 00:25:47,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773725033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:47,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:47,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:47,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438841847] [2022-11-22 00:25:47,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:47,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:25:47,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:47,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:25:47,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:25:47,297 INFO L87 Difference]: Start difference. First operand 30435 states and 42461 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:53,043 INFO L93 Difference]: Finished difference Result 48763 states and 67427 transitions. [2022-11-22 00:25:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:25:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-22 00:25:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:53,120 INFO L225 Difference]: With dead ends: 48763 [2022-11-22 00:25:53,121 INFO L226 Difference]: Without dead ends: 39609 [2022-11-22 00:25:53,135 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 [2022-11-22 00:25:53,136 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 172 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:53,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 731 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39609 states. [2022-11-22 00:25:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39609 to 39607. [2022-11-22 00:25:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39607 states, 39606 states have (on average 1.374362470332778) internal successors, (54433), 39606 states have internal predecessors, (54433), 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) [2022-11-22 00:25:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39607 states to 39607 states and 54433 transitions. [2022-11-22 00:25:58,150 INFO L78 Accepts]: Start accepts. Automaton has 39607 states and 54433 transitions. Word has length 72 [2022-11-22 00:25:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:58,151 INFO L495 AbstractCegarLoop]: Abstraction has 39607 states and 54433 transitions. [2022-11-22 00:25:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:25:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 39607 states and 54433 transitions. [2022-11-22 00:25:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 00:25:58,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:58,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:58,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:25:58,217 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1174942000, now seen corresponding path program 1 times [2022-11-22 00:25:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:58,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019444428] [2022-11-22 00:25:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:58,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:25:58,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:58,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019444428] [2022-11-22 00:25:58,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019444428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:58,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:25:58,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:25:58,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358234211] [2022-11-22 00:25:58,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:58,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:25:58,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:58,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:25:58,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:25:58,556 INFO L87 Difference]: Start difference. First operand 39607 states and 54433 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 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) [2022-11-22 00:26:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:26:06,748 INFO L93 Difference]: Finished difference Result 95302 states and 131347 transitions. [2022-11-22 00:26:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:26:06,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2022-11-22 00:26:06,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:26:06,858 INFO L225 Difference]: With dead ends: 95302 [2022-11-22 00:26:06,859 INFO L226 Difference]: Without dead ends: 55705 [2022-11-22 00:26:06,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:26:06,903 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 296 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:26:06,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 510 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:26:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55705 states.