./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh --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 0df39af5bb0da8e3087f1622629197ff07999529140b31d9eb8577cc8820a051 --- 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-2329fc7 [2022-12-14 10:43:02,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:43:02,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:43:02,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:43:02,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:43:02,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:43:02,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:43:02,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:43:02,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:43:02,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:43:02,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:43:02,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:43:02,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:43:02,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:43:02,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:43:02,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:43:02,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:43:02,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:43:02,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:43:02,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:43:02,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:43:02,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:43:02,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:43:02,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:43:02,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:43:02,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:43:02,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:43:02,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:43:02,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:43:02,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:43:02,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:43:02,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:43:02,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:43:02,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:43:02,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:43:02,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:43:02,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:43:02,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:43:02,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:43:02,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:43:02,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:43:02,852 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:43:02,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:43:02,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:43:02,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:43:02,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:43:02,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:43:02,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:43:02,878 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:43:02,878 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:43:02,878 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:43:02,878 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:43:02,879 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:43:02,879 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:43:02,879 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:43:02,879 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:43:02,879 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:43:02,880 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:43:02,880 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:43:02,880 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:43:02,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:43:02,881 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:43:02,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:43:02,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:43:02,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:43:02,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:43:02,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:43:02,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:43:02,882 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:43:02,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:43:02,883 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:43:02,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:43:02,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:43:02,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:43:02,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:43:02,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:43:02,884 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:43:02,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:43:02,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:43:02,884 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:43:02,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:43:02,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:43:02,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:43:02,885 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_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0df39af5bb0da8e3087f1622629197ff07999529140b31d9eb8577cc8820a051 [2022-12-14 10:43:03,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:43:03,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:43:03,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:43:03,105 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:43:03,105 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:43:03,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 10:43:05,651 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:43:05,813 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:43:05,814 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 10:43:05,823 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/data/ff4f7bcbe/07829fdcfc5e40b787e7f984e848f8e1/FLAGc1303290c [2022-12-14 10:43:05,835 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/data/ff4f7bcbe/07829fdcfc5e40b787e7f984e848f8e1 [2022-12-14 10:43:05,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:43:05,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:43:05,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:43:05,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:43:05,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:43:05,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:43:05" (1/1) ... [2022-12-14 10:43:05,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222cc0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:05, skipping insertion in model container [2022-12-14 10:43:05,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:43:05" (1/1) ... [2022-12-14 10:43:05,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:43:05,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:43:06,024 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_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7105,7118] [2022-12-14 10:43:06,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:43:06,076 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:43:06,108 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_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7105,7118] [2022-12-14 10:43:06,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:43:06,148 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:43:06,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06 WrapperNode [2022-12-14 10:43:06,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:43:06,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:43:06,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:43:06,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:43:06,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,187 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 660 [2022-12-14 10:43:06,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:43:06,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:43:06,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:43:06,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:43:06,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,208 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:43:06,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:43:06,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:43:06,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:43:06,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (1/1) ... [2022-12-14 10:43:06,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:43:06,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:43:06,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:43:06,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:43:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:43:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:43:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:43:06,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:43:06,385 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:43:06,386 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:43:06,808 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:43:06,919 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:43:06,919 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 10:43:06,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:43:06 BoogieIcfgContainer [2022-12-14 10:43:06,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:43:06,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:43:06,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:43:06,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:43:06,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:43:05" (1/3) ... [2022-12-14 10:43:06,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b50aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:43:06, skipping insertion in model container [2022-12-14 10:43:06,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:43:06" (2/3) ... [2022-12-14 10:43:06,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b50aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:43:06, skipping insertion in model container [2022-12-14 10:43:06,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:43:06" (3/3) ... [2022-12-14 10:43:06,929 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 10:43:06,945 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:43:06,945 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:43:06,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:43:06,987 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;@23dd6283, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:43:06,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:43:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:43:06,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:06,997 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] [2022-12-14 10:43:06,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:07,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1933228164, now seen corresponding path program 1 times [2022-12-14 10:43:07,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737511793] [2022-12-14 10:43:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:07,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:07,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:07,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737511793] [2022-12-14 10:43:07,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737511793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:07,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:07,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:43:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843199996] [2022-12-14 10:43:07,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:07,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:43:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:43:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:43:07,420 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 0 states have call successors, (0), 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 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:07,653 INFO L93 Difference]: Finished difference Result 395 states and 633 transitions. [2022-12-14 10:43:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:43:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-12-14 10:43:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:07,662 INFO L225 Difference]: With dead ends: 395 [2022-12-14 10:43:07,663 INFO L226 Difference]: Without dead ends: 315 [2022-12-14 10:43:07,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:43:07,667 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 659 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:07,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 774 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:43:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-12-14 10:43:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 309. [2022-12-14 10:43:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.396103896103896) internal successors, (430), 308 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 430 transitions. [2022-12-14 10:43:07,750 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 430 transitions. Word has length 53 [2022-12-14 10:43:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:07,751 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 430 transitions. [2022-12-14 10:43:07,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 430 transitions. [2022-12-14 10:43:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 10:43:07,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:07,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:07,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:43:07,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:07,755 INFO L85 PathProgramCache]: Analyzing trace with hash 488321140, now seen corresponding path program 1 times [2022-12-14 10:43:07,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:07,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205216692] [2022-12-14 10:43:07,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:07,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:07,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:07,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205216692] [2022-12-14 10:43:07,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205216692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:07,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:07,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:43:07,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685150166] [2022-12-14 10:43:07,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:07,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:43:07,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:43:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:43:07,905 INFO L87 Difference]: Start difference. First operand 309 states and 430 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:08,117 INFO L93 Difference]: Finished difference Result 739 states and 1060 transitions. [2022-12-14 10:43:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:43:08,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 10:43:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:08,119 INFO L225 Difference]: With dead ends: 739 [2022-12-14 10:43:08,119 INFO L226 Difference]: Without dead ends: 479 [2022-12-14 10:43:08,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:43:08,122 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 460 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:08,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 182 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:43:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-12-14 10:43:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2022-12-14 10:43:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.4285714285714286) internal successors, (680), 476 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 680 transitions. [2022-12-14 10:43:08,187 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 680 transitions. Word has length 54 [2022-12-14 10:43:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:08,188 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 680 transitions. [2022-12-14 10:43:08,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 680 transitions. [2022-12-14 10:43:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 10:43:08,190 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:08,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:08,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:43:08,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1482822318, now seen corresponding path program 1 times [2022-12-14 10:43:08,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:08,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198984208] [2022-12-14 10:43:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:08,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:08,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198984208] [2022-12-14 10:43:08,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198984208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:08,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:08,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:43:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601492691] [2022-12-14 10:43:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:43:08,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:43:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:43:08,299 INFO L87 Difference]: Start difference. First operand 477 states and 680 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:08,577 INFO L93 Difference]: Finished difference Result 1193 states and 1746 transitions. [2022-12-14 10:43:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:43:08,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 10:43:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:08,580 INFO L225 Difference]: With dead ends: 1193 [2022-12-14 10:43:08,580 INFO L226 Difference]: Without dead ends: 815 [2022-12-14 10:43:08,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:43:08,582 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 432 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:08,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 198 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:43:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-12-14 10:43:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 813. [2022-12-14 10:43:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.4532019704433496) internal successors, (1180), 812 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1180 transitions. [2022-12-14 10:43:08,675 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1180 transitions. Word has length 54 [2022-12-14 10:43:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:08,675 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1180 transitions. [2022-12-14 10:43:08,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1180 transitions. [2022-12-14 10:43:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 10:43:08,677 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:08,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:08,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:43:08,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash 781901251, now seen corresponding path program 1 times [2022-12-14 10:43:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:08,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416856456] [2022-12-14 10:43:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:08,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:08,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:08,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416856456] [2022-12-14 10:43:08,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416856456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:08,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:08,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:43:08,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777597862] [2022-12-14 10:43:08,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:08,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:43:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:43:08,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:43:08,765 INFO L87 Difference]: Start difference. First operand 813 states and 1180 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:09,074 INFO L93 Difference]: Finished difference Result 2228 states and 3287 transitions. [2022-12-14 10:43:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:43:09,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 10:43:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:09,081 INFO L225 Difference]: With dead ends: 2228 [2022-12-14 10:43:09,081 INFO L226 Difference]: Without dead ends: 1487 [2022-12-14 10:43:09,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:43:09,083 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 437 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:09,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 190 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:43:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-12-14 10:43:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1485. [2022-12-14 10:43:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 1.463611859838275) internal successors, (2172), 1484 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2172 transitions. [2022-12-14 10:43:09,197 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2172 transitions. Word has length 54 [2022-12-14 10:43:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:09,197 INFO L495 AbstractCegarLoop]: Abstraction has 1485 states and 2172 transitions. [2022-12-14 10:43:09,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2172 transitions. [2022-12-14 10:43:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 10:43:09,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:09,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:09,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:43:09,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash 795108709, now seen corresponding path program 1 times [2022-12-14 10:43:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:09,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456460614] [2022-12-14 10:43:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:09,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:09,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:09,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456460614] [2022-12-14 10:43:09,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456460614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:09,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:09,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:43:09,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135029038] [2022-12-14 10:43:09,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:09,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:43:09,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:09,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:43:09,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:43:09,291 INFO L87 Difference]: Start difference. First operand 1485 states and 2172 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:09,631 INFO L93 Difference]: Finished difference Result 3995 states and 5884 transitions. [2022-12-14 10:43:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:43:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 10:43:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:09,640 INFO L225 Difference]: With dead ends: 3995 [2022-12-14 10:43:09,640 INFO L226 Difference]: Without dead ends: 2543 [2022-12-14 10:43:09,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:43:09,643 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 453 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:09,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 174 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:43:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-12-14 10:43:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2541. [2022-12-14 10:43:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 1.4559055118110236) internal successors, (3698), 2540 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3698 transitions. [2022-12-14 10:43:09,887 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3698 transitions. Word has length 54 [2022-12-14 10:43:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:09,888 INFO L495 AbstractCegarLoop]: Abstraction has 2541 states and 3698 transitions. [2022-12-14 10:43:09,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3698 transitions. [2022-12-14 10:43:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 10:43:09,888 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:09,889 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] [2022-12-14 10:43:09,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:43:09,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash -111425200, now seen corresponding path program 1 times [2022-12-14 10:43:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:09,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670515630] [2022-12-14 10:43:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:09,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:10,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:10,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670515630] [2022-12-14 10:43:10,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670515630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:10,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:10,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 10:43:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146804082] [2022-12-14 10:43:10,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:10,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:43:10,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:10,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:43:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:43:10,728 INFO L87 Difference]: Start difference. First operand 2541 states and 3698 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:11,786 INFO L93 Difference]: Finished difference Result 5297 states and 7697 transitions. [2022-12-14 10:43:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:43:11,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-12-14 10:43:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:11,804 INFO L225 Difference]: With dead ends: 5297 [2022-12-14 10:43:11,804 INFO L226 Difference]: Without dead ends: 5295 [2022-12-14 10:43:11,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:43:11,807 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 553 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:11,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1291 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:43:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2022-12-14 10:43:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 4356. [2022-12-14 10:43:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 1.4507462686567165) internal successors, (6318), 4355 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 6318 transitions. [2022-12-14 10:43:12,374 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 6318 transitions. Word has length 55 [2022-12-14 10:43:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:12,374 INFO L495 AbstractCegarLoop]: Abstraction has 4356 states and 6318 transitions. [2022-12-14 10:43:12,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 6318 transitions. [2022-12-14 10:43:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 10:43:12,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:12,375 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] [2022-12-14 10:43:12,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:43:12,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1461880560, now seen corresponding path program 1 times [2022-12-14 10:43:12,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:12,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741239990] [2022-12-14 10:43:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:12,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:13,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:13,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741239990] [2022-12-14 10:43:13,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741239990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:13,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:13,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 10:43:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773578204] [2022-12-14 10:43:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:13,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:43:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:43:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:43:13,199 INFO L87 Difference]: Start difference. First operand 4356 states and 6318 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:14,321 INFO L93 Difference]: Finished difference Result 4966 states and 7187 transitions. [2022-12-14 10:43:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:43:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-12-14 10:43:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:14,330 INFO L225 Difference]: With dead ends: 4966 [2022-12-14 10:43:14,330 INFO L226 Difference]: Without dead ends: 4964 [2022-12-14 10:43:14,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:43:14,332 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 511 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:14,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1647 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:43:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2022-12-14 10:43:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 4376. [2022-12-14 10:43:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4376 states, 4375 states have (on average 1.4493714285714285) internal successors, (6341), 4375 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4376 states to 4376 states and 6341 transitions. [2022-12-14 10:43:14,758 INFO L78 Accepts]: Start accepts. Automaton has 4376 states and 6341 transitions. Word has length 55 [2022-12-14 10:43:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:14,759 INFO L495 AbstractCegarLoop]: Abstraction has 4376 states and 6341 transitions. [2022-12-14 10:43:14,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4376 states and 6341 transitions. [2022-12-14 10:43:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 10:43:14,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:14,759 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] [2022-12-14 10:43:14,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:43:14,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash -646185680, now seen corresponding path program 1 times [2022-12-14 10:43:14,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:14,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690167288] [2022-12-14 10:43:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:14,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:15,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:15,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690167288] [2022-12-14 10:43:15,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690167288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:15,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:15,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 10:43:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429492482] [2022-12-14 10:43:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:15,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:43:15,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:43:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:43:15,381 INFO L87 Difference]: Start difference. First operand 4376 states and 6341 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:16,450 INFO L93 Difference]: Finished difference Result 6380 states and 9229 transitions. [2022-12-14 10:43:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:43:16,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-12-14 10:43:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:16,460 INFO L225 Difference]: With dead ends: 6380 [2022-12-14 10:43:16,460 INFO L226 Difference]: Without dead ends: 5594 [2022-12-14 10:43:16,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:43:16,462 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 609 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:16,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1711 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:43:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2022-12-14 10:43:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 5080. [2022-12-14 10:43:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5080 states, 5079 states have (on average 1.4465445953927938) internal successors, (7347), 5079 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 7347 transitions. [2022-12-14 10:43:16,923 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 7347 transitions. Word has length 55 [2022-12-14 10:43:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:16,924 INFO L495 AbstractCegarLoop]: Abstraction has 5080 states and 7347 transitions. [2022-12-14 10:43:16,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 7347 transitions. [2022-12-14 10:43:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 10:43:16,924 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:16,924 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] [2022-12-14 10:43:16,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:43:16,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash 514645360, now seen corresponding path program 1 times [2022-12-14 10:43:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:16,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030830133] [2022-12-14 10:43:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:17,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:17,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030830133] [2022-12-14 10:43:17,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030830133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:17,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:17,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 10:43:17,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78681310] [2022-12-14 10:43:17,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:17,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:43:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:43:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:43:17,466 INFO L87 Difference]: Start difference. First operand 5080 states and 7347 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:18,877 INFO L93 Difference]: Finished difference Result 8787 states and 12760 transitions. [2022-12-14 10:43:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:43:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-12-14 10:43:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:18,895 INFO L225 Difference]: With dead ends: 8787 [2022-12-14 10:43:18,895 INFO L226 Difference]: Without dead ends: 8785 [2022-12-14 10:43:18,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:43:18,897 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 512 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:18,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 1612 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:43:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2022-12-14 10:43:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 5705. [2022-12-14 10:43:19,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 1.4481065918653577) internal successors, (8260), 5704 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 8260 transitions. [2022-12-14 10:43:19,558 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 8260 transitions. Word has length 55 [2022-12-14 10:43:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:19,558 INFO L495 AbstractCegarLoop]: Abstraction has 5705 states and 8260 transitions. [2022-12-14 10:43:19,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 8260 transitions. [2022-12-14 10:43:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 10:43:19,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:19,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:19,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:43:19,559 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1239078372, now seen corresponding path program 1 times [2022-12-14 10:43:19,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:19,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159878192] [2022-12-14 10:43:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:20,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:20,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159878192] [2022-12-14 10:43:20,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159878192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:20,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:20,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 10:43:20,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249694149] [2022-12-14 10:43:20,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:20,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:43:20,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:20,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:43:20,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:43:20,146 INFO L87 Difference]: Start difference. First operand 5705 states and 8260 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:21,749 INFO L93 Difference]: Finished difference Result 10250 states and 14842 transitions. [2022-12-14 10:43:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:43:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 10:43:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:21,762 INFO L225 Difference]: With dead ends: 10250 [2022-12-14 10:43:21,762 INFO L226 Difference]: Without dead ends: 10248 [2022-12-14 10:43:21,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:43:21,764 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 589 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:21,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1031 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:43:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10248 states. [2022-12-14 10:43:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10248 to 5714. [2022-12-14 10:43:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5714 states, 5713 states have (on average 1.44757570453352) internal successors, (8270), 5713 states have internal predecessors, (8270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5714 states to 5714 states and 8270 transitions. [2022-12-14 10:43:22,439 INFO L78 Accepts]: Start accepts. Automaton has 5714 states and 8270 transitions. Word has length 57 [2022-12-14 10:43:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:22,439 INFO L495 AbstractCegarLoop]: Abstraction has 5714 states and 8270 transitions. [2022-12-14 10:43:22,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 5714 states and 8270 transitions. [2022-12-14 10:43:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 10:43:22,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:22,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:22,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:43:22,441 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:22,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2054773252, now seen corresponding path program 1 times [2022-12-14 10:43:22,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:22,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724114046] [2022-12-14 10:43:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:22,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:23,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:23,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724114046] [2022-12-14 10:43:23,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724114046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:23,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:23,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 10:43:23,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212883972] [2022-12-14 10:43:23,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:23,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:43:23,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:23,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:43:23,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:43:23,596 INFO L87 Difference]: Start difference. First operand 5714 states and 8270 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:25,928 INFO L93 Difference]: Finished difference Result 7856 states and 11338 transitions. [2022-12-14 10:43:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:43:25,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 10:43:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:25,938 INFO L225 Difference]: With dead ends: 7856 [2022-12-14 10:43:25,938 INFO L226 Difference]: Without dead ends: 7854 [2022-12-14 10:43:25,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:43:25,940 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 613 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:25,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1833 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:43:25,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2022-12-14 10:43:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 5730. [2022-12-14 10:43:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5730 states, 5729 states have (on average 1.4466748123581776) internal successors, (8288), 5729 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5730 states to 5730 states and 8288 transitions. [2022-12-14 10:43:26,583 INFO L78 Accepts]: Start accepts. Automaton has 5730 states and 8288 transitions. Word has length 57 [2022-12-14 10:43:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:26,583 INFO L495 AbstractCegarLoop]: Abstraction has 5730 states and 8288 transitions. [2022-12-14 10:43:26,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5730 states and 8288 transitions. [2022-12-14 10:43:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 10:43:26,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:26,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:26,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:43:26,584 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1564634684, now seen corresponding path program 1 times [2022-12-14 10:43:26,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:26,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548450459] [2022-12-14 10:43:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:27,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548450459] [2022-12-14 10:43:27,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548450459] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:27,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:27,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 10:43:27,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415302810] [2022-12-14 10:43:27,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:27,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:43:27,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:27,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:43:27,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:43:27,626 INFO L87 Difference]: Start difference. First operand 5730 states and 8288 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:30,248 INFO L93 Difference]: Finished difference Result 6739 states and 9722 transitions. [2022-12-14 10:43:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 10:43:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 10:43:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:30,257 INFO L225 Difference]: With dead ends: 6739 [2022-12-14 10:43:30,257 INFO L226 Difference]: Without dead ends: 6737 [2022-12-14 10:43:30,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 10:43:30,258 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 687 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:30,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 1511 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:43:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2022-12-14 10:43:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 5734. [2022-12-14 10:43:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5734 states, 5733 states have (on average 1.4465375893947323) internal successors, (8293), 5733 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5734 states to 5734 states and 8293 transitions. [2022-12-14 10:43:30,931 INFO L78 Accepts]: Start accepts. Automaton has 5734 states and 8293 transitions. Word has length 57 [2022-12-14 10:43:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:30,931 INFO L495 AbstractCegarLoop]: Abstraction has 5734 states and 8293 transitions. [2022-12-14 10:43:30,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5734 states and 8293 transitions. [2022-12-14 10:43:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 10:43:30,932 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:30,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:30,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 10:43:30,932 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:30,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1347046844, now seen corresponding path program 1 times [2022-12-14 10:43:30,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:30,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132581297] [2022-12-14 10:43:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:30,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:31,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:31,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132581297] [2022-12-14 10:43:31,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132581297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:31,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:31,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 10:43:31,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272209718] [2022-12-14 10:43:31,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:31,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:43:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:43:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:43:31,704 INFO L87 Difference]: Start difference. First operand 5734 states and 8293 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:33,814 INFO L93 Difference]: Finished difference Result 10291 states and 14889 transitions. [2022-12-14 10:43:33,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:43:33,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 10:43:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:33,825 INFO L225 Difference]: With dead ends: 10291 [2022-12-14 10:43:33,825 INFO L226 Difference]: Without dead ends: 10289 [2022-12-14 10:43:33,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:43:33,827 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 433 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:33,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1528 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:43:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10289 states. [2022-12-14 10:43:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10289 to 5738. [2022-12-14 10:43:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 1.446574864911975) internal successors, (8299), 5737 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 8299 transitions. [2022-12-14 10:43:34,605 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 8299 transitions. Word has length 57 [2022-12-14 10:43:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:34,605 INFO L495 AbstractCegarLoop]: Abstraction has 5738 states and 8299 transitions. [2022-12-14 10:43:34,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 8299 transitions. [2022-12-14 10:43:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 10:43:34,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:34,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:34,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:43:34,606 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1597465092, now seen corresponding path program 1 times [2022-12-14 10:43:34,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:34,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110772931] [2022-12-14 10:43:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:35,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:35,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110772931] [2022-12-14 10:43:35,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110772931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:35,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:35,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 10:43:35,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301534275] [2022-12-14 10:43:35,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:35,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:43:35,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:35,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:43:35,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:43:35,483 INFO L87 Difference]: Start difference. First operand 5738 states and 8299 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:38,247 INFO L93 Difference]: Finished difference Result 6373 states and 9192 transitions. [2022-12-14 10:43:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 10:43:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 10:43:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:38,254 INFO L225 Difference]: With dead ends: 6373 [2022-12-14 10:43:38,254 INFO L226 Difference]: Without dead ends: 6371 [2022-12-14 10:43:38,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 10:43:38,256 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 672 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:38,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 1572 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:43:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2022-12-14 10:43:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 5738. [2022-12-14 10:43:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 1.446574864911975) internal successors, (8299), 5737 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 8299 transitions. [2022-12-14 10:43:39,076 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 8299 transitions. Word has length 57 [2022-12-14 10:43:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:39,077 INFO L495 AbstractCegarLoop]: Abstraction has 5738 states and 8299 transitions. [2022-12-14 10:43:39,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 8299 transitions. [2022-12-14 10:43:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 10:43:39,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:39,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:43:39,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:43:39,078 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1881807324, now seen corresponding path program 1 times [2022-12-14 10:43:39,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:39,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160029957] [2022-12-14 10:43:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:39,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:39,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160029957] [2022-12-14 10:43:39,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160029957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:39,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:39,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 10:43:39,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130880883] [2022-12-14 10:43:39,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:39,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:43:39,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:39,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:43:39,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:43:39,545 INFO L87 Difference]: Start difference. First operand 5738 states and 8299 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:41,852 INFO L93 Difference]: Finished difference Result 11718 states and 16983 transitions. [2022-12-14 10:43:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:43:41,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 10:43:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:41,861 INFO L225 Difference]: With dead ends: 11718 [2022-12-14 10:43:41,861 INFO L226 Difference]: Without dead ends: 10148 [2022-12-14 10:43:41,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:43:41,863 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 483 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:41,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 2658 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:43:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2022-12-14 10:43:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 6425. [2022-12-14 10:43:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6425 states, 6424 states have (on average 1.4422478206724783) internal successors, (9265), 6424 states have internal predecessors, (9265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6425 states to 6425 states and 9265 transitions. [2022-12-14 10:43:42,918 INFO L78 Accepts]: Start accepts. Automaton has 6425 states and 9265 transitions. Word has length 57 [2022-12-14 10:43:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:42,918 INFO L495 AbstractCegarLoop]: Abstraction has 6425 states and 9265 transitions. [2022-12-14 10:43:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6425 states and 9265 transitions. [2022-12-14 10:43:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 10:43:42,918 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:42,919 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] [2022-12-14 10:43:42,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 10:43:42,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:42,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1605075452, now seen corresponding path program 1 times [2022-12-14 10:43:42,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:42,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077982610] [2022-12-14 10:43:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:42,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:42,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:42,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077982610] [2022-12-14 10:43:42,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077982610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:42,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:42,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:43:42,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002318738] [2022-12-14 10:43:42,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:42,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:43:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:42,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:43:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:43:42,941 INFO L87 Difference]: Start difference. First operand 6425 states and 9265 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) 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) [2022-12-14 10:43:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:44,021 INFO L93 Difference]: Finished difference Result 11761 states and 17028 transitions. [2022-12-14 10:43:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:43:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) 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 [2022-12-14 10:43:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:44,027 INFO L225 Difference]: With dead ends: 11761 [2022-12-14 10:43:44,027 INFO L226 Difference]: Without dead ends: 6213 [2022-12-14 10:43:44,031 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 [2022-12-14 10:43:44,032 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 111 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:44,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 292 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:43:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2022-12-14 10:43:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 6210. [2022-12-14 10:43:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 1.4404896118537607) internal successors, (8944), 6209 states have internal predecessors, (8944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 8944 transitions. [2022-12-14 10:43:45,070 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 8944 transitions. Word has length 58 [2022-12-14 10:43:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:45,070 INFO L495 AbstractCegarLoop]: Abstraction has 6210 states and 8944 transitions. [2022-12-14 10:43:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) 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) [2022-12-14 10:43:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 8944 transitions. [2022-12-14 10:43:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 10:43:45,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:45,071 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] [2022-12-14 10:43:45,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 10:43:45,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1396562559, now seen corresponding path program 1 times [2022-12-14 10:43:45,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:45,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513498347] [2022-12-14 10:43:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:45,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:45,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513498347] [2022-12-14 10:43:45,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513498347] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:45,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:45,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:43:45,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957078205] [2022-12-14 10:43:45,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:45,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:43:45,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:45,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:43:45,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:43:45,095 INFO L87 Difference]: Start difference. First operand 6210 states and 8944 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) 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) [2022-12-14 10:43:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:46,201 INFO L93 Difference]: Finished difference Result 12049 states and 17445 transitions. [2022-12-14 10:43:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:43:46,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) 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 [2022-12-14 10:43:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:46,206 INFO L225 Difference]: With dead ends: 12049 [2022-12-14 10:43:46,206 INFO L226 Difference]: Without dead ends: 6031 [2022-12-14 10:43:46,210 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 [2022-12-14 10:43:46,211 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 104 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:46,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 292 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:43:46,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2022-12-14 10:43:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 5980. [2022-12-14 10:43:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 1.4388693761498579) internal successors, (8603), 5979 states have internal predecessors, (8603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 8603 transitions. [2022-12-14 10:43:47,211 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 8603 transitions. Word has length 58 [2022-12-14 10:43:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:47,211 INFO L495 AbstractCegarLoop]: Abstraction has 5980 states and 8603 transitions. [2022-12-14 10:43:47,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) 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) [2022-12-14 10:43:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 8603 transitions. [2022-12-14 10:43:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 10:43:47,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:47,212 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] [2022-12-14 10:43:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 10:43:47,212 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1669311346, now seen corresponding path program 1 times [2022-12-14 10:43:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:47,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637407378] [2022-12-14 10:43:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:47,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:47,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637407378] [2022-12-14 10:43:47,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637407378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:47,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:47,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:43:47,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771812793] [2022-12-14 10:43:47,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:47,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:43:47,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:43:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:43:47,241 INFO L87 Difference]: Start difference. First operand 5980 states and 8603 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) 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) [2022-12-14 10:43:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:48,471 INFO L93 Difference]: Finished difference Result 10584 states and 15291 transitions. [2022-12-14 10:43:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:43:48,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) 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 [2022-12-14 10:43:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:48,476 INFO L225 Difference]: With dead ends: 10584 [2022-12-14 10:43:48,476 INFO L226 Difference]: Without dead ends: 5706 [2022-12-14 10:43:48,480 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 [2022-12-14 10:43:48,480 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 111 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:48,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 276 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:43:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2022-12-14 10:43:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 5704. [2022-12-14 10:43:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.4367876556198491) internal successors, (8194), 5703 states have internal predecessors, (8194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 8194 transitions. [2022-12-14 10:43:49,458 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 8194 transitions. Word has length 58 [2022-12-14 10:43:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:49,458 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 8194 transitions. [2022-12-14 10:43:49,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) 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) [2022-12-14 10:43:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 8194 transitions. [2022-12-14 10:43:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 10:43:49,459 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:49,459 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] [2022-12-14 10:43:49,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 10:43:49,459 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -781912377, now seen corresponding path program 1 times [2022-12-14 10:43:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377713572] [2022-12-14 10:43:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:49,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:49,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377713572] [2022-12-14 10:43:49,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377713572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:49,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:49,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:43:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265939122] [2022-12-14 10:43:49,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:49,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:43:49,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:43:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:43:49,491 INFO L87 Difference]: Start difference. First operand 5704 states and 8194 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) 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) [2022-12-14 10:43:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:50,556 INFO L93 Difference]: Finished difference Result 9760 states and 14076 transitions. [2022-12-14 10:43:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:43:50,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) 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 [2022-12-14 10:43:50,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:50,561 INFO L225 Difference]: With dead ends: 9760 [2022-12-14 10:43:50,561 INFO L226 Difference]: Without dead ends: 5472 [2022-12-14 10:43:50,563 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 [2022-12-14 10:43:50,564 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 102 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:50,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 276 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:43:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2022-12-14 10:43:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 5470. [2022-12-14 10:43:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5470 states, 5469 states have (on average 1.4355458036204058) internal successors, (7851), 5469 states have internal predecessors, (7851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 7851 transitions. [2022-12-14 10:43:51,501 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 7851 transitions. Word has length 58 [2022-12-14 10:43:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:51,501 INFO L495 AbstractCegarLoop]: Abstraction has 5470 states and 7851 transitions. [2022-12-14 10:43:51,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) 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) [2022-12-14 10:43:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 7851 transitions. [2022-12-14 10:43:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 10:43:51,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:51,502 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] [2022-12-14 10:43:51,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 10:43:51,502 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash -103347816, now seen corresponding path program 1 times [2022-12-14 10:43:51,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:51,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323954020] [2022-12-14 10:43:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:51,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:53,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323954020] [2022-12-14 10:43:53,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323954020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:53,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:53,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-12-14 10:43:53,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427318489] [2022-12-14 10:43:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:53,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 10:43:53,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 10:43:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:43:53,308 INFO L87 Difference]: Start difference. First operand 5470 states and 7851 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:56,771 INFO L93 Difference]: Finished difference Result 6370 states and 9117 transitions. [2022-12-14 10:43:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:43:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-12-14 10:43:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:56,777 INFO L225 Difference]: With dead ends: 6370 [2022-12-14 10:43:56,777 INFO L226 Difference]: Without dead ends: 6368 [2022-12-14 10:43:56,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=355, Invalid=1285, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 10:43:56,778 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 582 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:56,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 1221 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:43:56,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6368 states. [2022-12-14 10:43:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6368 to 5470. [2022-12-14 10:43:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5470 states, 5469 states have (on average 1.4355458036204058) internal successors, (7851), 5469 states have internal predecessors, (7851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 7851 transitions. [2022-12-14 10:43:57,729 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 7851 transitions. Word has length 59 [2022-12-14 10:43:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:57,729 INFO L495 AbstractCegarLoop]: Abstraction has 5470 states and 7851 transitions. [2022-12-14 10:43:57,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:43:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 7851 transitions. [2022-12-14 10:43:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 10:43:57,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:57,730 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] [2022-12-14 10:43:57,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 10:43:57,730 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash -782347816, now seen corresponding path program 1 times [2022-12-14 10:43:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:57,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804570795] [2022-12-14 10:43:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:43:59,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:59,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804570795] [2022-12-14 10:43:59,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804570795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:59,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:59,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 10:43:59,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803456344] [2022-12-14 10:43:59,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:59,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:43:59,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:43:59,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:43:59,235 INFO L87 Difference]: Start difference. First operand 5470 states and 7851 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:03,511 INFO L93 Difference]: Finished difference Result 8193 states and 11743 transitions. [2022-12-14 10:44:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:44:03,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-12-14 10:44:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:03,519 INFO L225 Difference]: With dead ends: 8193 [2022-12-14 10:44:03,519 INFO L226 Difference]: Without dead ends: 8191 [2022-12-14 10:44:03,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=412, Invalid=1658, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 10:44:03,521 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 755 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:03,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 2096 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 10:44:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8191 states. [2022-12-14 10:44:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8191 to 5466. [2022-12-14 10:44:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5465 states have (on average 1.4356816102470265) internal successors, (7846), 5465 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 7846 transitions. [2022-12-14 10:44:04,558 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 7846 transitions. Word has length 59 [2022-12-14 10:44:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:04,558 INFO L495 AbstractCegarLoop]: Abstraction has 5466 states and 7846 transitions. [2022-12-14 10:44:04,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 7846 transitions. [2022-12-14 10:44:04,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 10:44:04,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:04,558 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] [2022-12-14 10:44:04,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 10:44:04,559 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:04,559 INFO L85 PathProgramCache]: Analyzing trace with hash 33347064, now seen corresponding path program 1 times [2022-12-14 10:44:04,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:04,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968545735] [2022-12-14 10:44:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:04,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:44:05,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968545735] [2022-12-14 10:44:05,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968545735] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:05,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:05,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 10:44:05,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198489600] [2022-12-14 10:44:05,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:05,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:44:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:44:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:44:05,941 INFO L87 Difference]: Start difference. First operand 5466 states and 7846 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:09,589 INFO L93 Difference]: Finished difference Result 7230 states and 10375 transitions. [2022-12-14 10:44:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:44:09,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-12-14 10:44:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:09,595 INFO L225 Difference]: With dead ends: 7230 [2022-12-14 10:44:09,595 INFO L226 Difference]: Without dead ends: 6540 [2022-12-14 10:44:09,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 10:44:09,597 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 662 mSDsluCounter, 2214 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:09,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 2476 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:44:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6540 states. [2022-12-14 10:44:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6540 to 5450. [2022-12-14 10:44:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 1.4367773903468526) internal successors, (7829), 5449 states have internal predecessors, (7829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 7829 transitions. [2022-12-14 10:44:10,639 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 7829 transitions. Word has length 59 [2022-12-14 10:44:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:10,640 INFO L495 AbstractCegarLoop]: Abstraction has 5450 states and 7829 transitions. [2022-12-14 10:44:10,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 7829 transitions. [2022-12-14 10:44:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 10:44:10,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:10,640 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] [2022-12-14 10:44:10,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 10:44:10,641 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash 708906424, now seen corresponding path program 1 times [2022-12-14 10:44:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:10,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530047340] [2022-12-14 10:44:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:10,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:44:12,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:12,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530047340] [2022-12-14 10:44:12,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530047340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:12,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:12,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-12-14 10:44:12,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915618645] [2022-12-14 10:44:12,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:12,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:44:12,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:44:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:44:12,537 INFO L87 Difference]: Start difference. First operand 5450 states and 7829 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:17,888 INFO L93 Difference]: Finished difference Result 6013 states and 8615 transitions. [2022-12-14 10:44:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 10:44:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-12-14 10:44:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:17,893 INFO L225 Difference]: With dead ends: 6013 [2022-12-14 10:44:17,893 INFO L226 Difference]: Without dead ends: 6011 [2022-12-14 10:44:17,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=453, Invalid=1803, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 10:44:17,895 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 753 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:17,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 1643 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2717 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 10:44:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2022-12-14 10:44:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 5450. [2022-12-14 10:44:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 1.4367773903468526) internal successors, (7829), 5449 states have internal predecessors, (7829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 7829 transitions. [2022-12-14 10:44:18,973 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 7829 transitions. Word has length 59 [2022-12-14 10:44:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:18,973 INFO L495 AbstractCegarLoop]: Abstraction has 5450 states and 7829 transitions. [2022-12-14 10:44:18,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 7829 transitions. [2022-12-14 10:44:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 10:44:18,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:18,974 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] [2022-12-14 10:44:18,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 10:44:18,974 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:18,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1368696692, now seen corresponding path program 1 times [2022-12-14 10:44:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7085503] [2022-12-14 10:44:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:44:23,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7085503] [2022-12-14 10:44:23,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7085503] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:23,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:23,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-12-14 10:44:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133407005] [2022-12-14 10:44:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:23,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 10:44:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 10:44:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:44:23,318 INFO L87 Difference]: Start difference. First operand 5450 states and 7829 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:31,748 INFO L93 Difference]: Finished difference Result 6002 states and 8605 transitions. [2022-12-14 10:44:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 10:44:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-12-14 10:44:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:31,754 INFO L225 Difference]: With dead ends: 6002 [2022-12-14 10:44:31,754 INFO L226 Difference]: Without dead ends: 6000 [2022-12-14 10:44:31,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=746, Invalid=2676, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 10:44:31,755 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 674 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 3623 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:31,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 2101 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3623 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 10:44:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2022-12-14 10:44:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 5432. [2022-12-14 10:44:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 1.4380408764500092) internal successors, (7810), 5431 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 7810 transitions. [2022-12-14 10:44:32,834 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 7810 transitions. Word has length 61 [2022-12-14 10:44:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:32,834 INFO L495 AbstractCegarLoop]: Abstraction has 5432 states and 7810 transitions. [2022-12-14 10:44:32,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 7810 transitions. [2022-12-14 10:44:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 10:44:32,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:32,835 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:32,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 10:44:32,835 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:32,836 INFO L85 PathProgramCache]: Analyzing trace with hash 132130179, now seen corresponding path program 1 times [2022-12-14 10:44:32,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:32,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078115750] [2022-12-14 10:44:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:32,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:44:32,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:32,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078115750] [2022-12-14 10:44:32,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078115750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:32,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:32,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:44:32,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873217255] [2022-12-14 10:44:32,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:32,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:44:32,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:44:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:44:32,889 INFO L87 Difference]: Start difference. First operand 5432 states and 7810 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) 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) [2022-12-14 10:44:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:34,176 INFO L93 Difference]: Finished difference Result 8800 states and 12779 transitions. [2022-12-14 10:44:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:44:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) 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 [2022-12-14 10:44:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:34,182 INFO L225 Difference]: With dead ends: 8800 [2022-12-14 10:44:34,182 INFO L226 Difference]: Without dead ends: 6734 [2022-12-14 10:44:34,184 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 [2022-12-14 10:44:34,184 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 79 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:34,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 330 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:44:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2022-12-14 10:44:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 6335. [2022-12-14 10:44:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6335 states, 6334 states have (on average 1.4381117777076098) internal successors, (9109), 6334 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 9109 transitions. [2022-12-14 10:44:35,414 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 9109 transitions. Word has length 64 [2022-12-14 10:44:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:35,414 INFO L495 AbstractCegarLoop]: Abstraction has 6335 states and 9109 transitions. [2022-12-14 10:44:35,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) 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) [2022-12-14 10:44:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 9109 transitions. [2022-12-14 10:44:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 10:44:35,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:35,415 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:35,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 10:44:35,416 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1454688346, now seen corresponding path program 1 times [2022-12-14 10:44:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:35,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325386272] [2022-12-14 10:44:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:44:35,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:35,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325386272] [2022-12-14 10:44:35,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325386272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:35,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:35,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:44:35,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796613126] [2022-12-14 10:44:35,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:35,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:44:35,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:35,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:44:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:44:35,467 INFO L87 Difference]: Start difference. First operand 6335 states and 9109 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:37,000 INFO L93 Difference]: Finished difference Result 11050 states and 16033 transitions. [2022-12-14 10:44:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:44:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-14 10:44:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:37,008 INFO L225 Difference]: With dead ends: 11050 [2022-12-14 10:44:37,008 INFO L226 Difference]: Without dead ends: 8096 [2022-12-14 10:44:37,011 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 [2022-12-14 10:44:37,011 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 74 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:37,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 312 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:44:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2022-12-14 10:44:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 7566. [2022-12-14 10:44:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7566 states, 7565 states have (on average 1.4360872438863186) internal successors, (10864), 7565 states have internal predecessors, (10864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7566 states to 7566 states and 10864 transitions. [2022-12-14 10:44:38,494 INFO L78 Accepts]: Start accepts. Automaton has 7566 states and 10864 transitions. Word has length 67 [2022-12-14 10:44:38,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:38,494 INFO L495 AbstractCegarLoop]: Abstraction has 7566 states and 10864 transitions. [2022-12-14 10:44:38,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:38,494 INFO L276 IsEmpty]: Start isEmpty. Operand 7566 states and 10864 transitions. [2022-12-14 10:44:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 10:44:38,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:38,495 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:38,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 10:44:38,496 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1453976912, now seen corresponding path program 1 times [2022-12-14 10:44:38,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883997684] [2022-12-14 10:44:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:44:38,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:38,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883997684] [2022-12-14 10:44:38,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883997684] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:38,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:38,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:44:38,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343198797] [2022-12-14 10:44:38,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:38,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:44:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:44:38,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:44:38,526 INFO L87 Difference]: Start difference. First operand 7566 states and 10864 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2022-12-14 10:44:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:40,685 INFO L93 Difference]: Finished difference Result 15316 states and 21985 transitions. [2022-12-14 10:44:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:44:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 [2022-12-14 10:44:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:40,695 INFO L225 Difference]: With dead ends: 15316 [2022-12-14 10:44:40,695 INFO L226 Difference]: Without dead ends: 10690 [2022-12-14 10:44:40,699 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 [2022-12-14 10:44:40,700 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 74 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:40,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 318 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:44:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10690 states. [2022-12-14 10:44:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10690 to 10688. [2022-12-14 10:44:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10688 states, 10687 states have (on average 1.4238794797417422) internal successors, (15217), 10687 states have internal predecessors, (15217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10688 states to 10688 states and 15217 transitions. [2022-12-14 10:44:42,834 INFO L78 Accepts]: Start accepts. Automaton has 10688 states and 15217 transitions. Word has length 70 [2022-12-14 10:44:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:42,835 INFO L495 AbstractCegarLoop]: Abstraction has 10688 states and 15217 transitions. [2022-12-14 10:44:42,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2022-12-14 10:44:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10688 states and 15217 transitions. [2022-12-14 10:44:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 10:44:42,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:42,836 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:42,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 10:44:42,836 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash -876156176, now seen corresponding path program 1 times [2022-12-14 10:44:42,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:42,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118597200] [2022-12-14 10:44:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:42,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:44:42,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:42,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118597200] [2022-12-14 10:44:42,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118597200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:42,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:42,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:44:42,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235848292] [2022-12-14 10:44:42,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:42,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:44:42,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:44:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:44:42,887 INFO L87 Difference]: Start difference. First operand 10688 states and 15217 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2022-12-14 10:44:45,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:45,885 INFO L93 Difference]: Finished difference Result 21080 states and 30238 transitions. [2022-12-14 10:44:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:44:45,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 [2022-12-14 10:44:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:45,899 INFO L225 Difference]: With dead ends: 21080 [2022-12-14 10:44:45,900 INFO L226 Difference]: Without dead ends: 14526 [2022-12-14 10:44:45,904 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 [2022-12-14 10:44:45,905 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 69 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:45,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 293 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:44:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14526 states. [2022-12-14 10:44:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14526 to 13394. [2022-12-14 10:44:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13394 states, 13393 states have (on average 1.4173075487194804) internal successors, (18982), 13393 states have internal predecessors, (18982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13394 states to 13394 states and 18982 transitions. [2022-12-14 10:44:48,653 INFO L78 Accepts]: Start accepts. Automaton has 13394 states and 18982 transitions. Word has length 70 [2022-12-14 10:44:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:48,654 INFO L495 AbstractCegarLoop]: Abstraction has 13394 states and 18982 transitions. [2022-12-14 10:44:48,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2022-12-14 10:44:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 13394 states and 18982 transitions. [2022-12-14 10:44:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:44:48,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:48,655 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:48,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 10:44:48,655 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:48,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash 283951118, now seen corresponding path program 1 times [2022-12-14 10:44:48,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:48,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000396382] [2022-12-14 10:44:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:48,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:44:48,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:48,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000396382] [2022-12-14 10:44:48,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000396382] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:48,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:48,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:44:48,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511350325] [2022-12-14 10:44:48,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:48,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:44:48,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:44:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:44:48,730 INFO L87 Difference]: Start difference. First operand 13394 states and 18982 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:52,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:52,706 INFO L93 Difference]: Finished difference Result 31334 states and 44588 transitions. [2022-12-14 10:44:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:44:52,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-12-14 10:44:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:52,727 INFO L225 Difference]: With dead ends: 31334 [2022-12-14 10:44:52,728 INFO L226 Difference]: Without dead ends: 19526 [2022-12-14 10:44:52,738 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 [2022-12-14 10:44:52,738 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 64 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:52,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 272 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:44:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19526 states. [2022-12-14 10:44:56,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19526 to 17956. [2022-12-14 10:44:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17956 states, 17955 states have (on average 1.4089668615984405) internal successors, (25298), 17955 states have internal predecessors, (25298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17956 states to 17956 states and 25298 transitions. [2022-12-14 10:44:56,475 INFO L78 Accepts]: Start accepts. Automaton has 17956 states and 25298 transitions. Word has length 73 [2022-12-14 10:44:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:56,476 INFO L495 AbstractCegarLoop]: Abstraction has 17956 states and 25298 transitions. [2022-12-14 10:44:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:44:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 17956 states and 25298 transitions. [2022-12-14 10:44:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 10:44:56,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:56,479 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:56,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 10:44:56,479 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash -588236927, now seen corresponding path program 1 times [2022-12-14 10:44:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:56,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018015598] [2022-12-14 10:44:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:44:56,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:56,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018015598] [2022-12-14 10:44:56,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018015598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:56,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:56,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:44:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758708911] [2022-12-14 10:44:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:56,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:44:56,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:44:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:44:56,641 INFO L87 Difference]: Start difference. First operand 17956 states and 25298 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:45:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:45:06,849 INFO L93 Difference]: Finished difference Result 63052 states and 88455 transitions. [2022-12-14 10:45:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:45:06,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 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 87 [2022-12-14 10:45:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:45:06,908 INFO L225 Difference]: With dead ends: 63052 [2022-12-14 10:45:06,909 INFO L226 Difference]: Without dead ends: 46488 [2022-12-14 10:45:06,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:45:06,926 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1217 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:45:06,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 276 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:45:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46488 states. [2022-12-14 10:45:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46488 to 30978. [2022-12-14 10:45:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30978 states, 30977 states have (on average 1.3810246311779708) internal successors, (42780), 30977 states have internal predecessors, (42780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:45:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30978 states to 30978 states and 42780 transitions. [2022-12-14 10:45:14,200 INFO L78 Accepts]: Start accepts. Automaton has 30978 states and 42780 transitions. Word has length 87 [2022-12-14 10:45:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:45:14,200 INFO L495 AbstractCegarLoop]: Abstraction has 30978 states and 42780 transitions. [2022-12-14 10:45:14,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:45:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 30978 states and 42780 transitions. [2022-12-14 10:45:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 10:45:14,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:45:14,204 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:45:14,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 10:45:14,204 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:45:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:45:14,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1553688858, now seen corresponding path program 1 times [2022-12-14 10:45:14,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:45:14,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804563876] [2022-12-14 10:45:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:45:14,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:45:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:45:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:45:15,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:45:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804563876] [2022-12-14 10:45:15,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804563876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:45:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253454641] [2022-12-14 10:45:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:45:15,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:45:15,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:45:15,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:45:15,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf46abc6-e8f4-48f3-aeb3-2eb560c4ad92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:45:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:45:15,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 10:45:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:45:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:45:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:53:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:53:01,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253454641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:53:01,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598014376] [2022-12-14 10:53:01,584 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-12-14 10:53:01,584 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:53:01,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:53:01,590 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:53:01,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:53:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:01,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 10:53:01,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:53:01,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:53:01,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:53:01,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 10:54:21,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:55:01,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '803630#(and (<= (+ |ULTIMATE.start_main_~node2__m2~1#1| 1) 0) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (<= ~__return_19179~0 1) (<= ~__return_19080~0 1) (= ~p4~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= |ULTIMATE.start_main_~check__tmp~1#1| 1) (<= 0 ~mode3~0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~1#1| 1)) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= ~__return_19337~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= (+ |ULTIMATE.start_main_~node4__m4~1#1| 1) 0) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~1#1| 1)) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~st4~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 0 |ULTIMATE.start_main_~check__tmp~1#1|) (<= 1 ~__return_19080~0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 1 ~__return_19179~0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~1#1| 1) 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~1#1| 1)) (<= 0 ~__return_19337~0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-12-14 10:55:01,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:55:01,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:55:01,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 20] total 60 [2022-12-14 10:55:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282828503] [2022-12-14 10:55:01,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:55:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 10:55:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:55:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 10:55:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1788, Invalid=12254, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 10:55:01,084 INFO L87 Difference]: Start difference. First operand 30978 states and 42780 transitions. Second operand has 60 states, 60 states have (on average 4.233333333333333) internal successors, (254), 60 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:55:29,920 WARN L233 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 619 DAG size of output: 534 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:57:05,026 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 617 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:57:14,031 WARN L233 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 623 DAG size of output: 546 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:57:24,849 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 581 DAG size of output: 574 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)