./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V --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 35eb4fe61244b47e62120cf84d8eaed931ae7a7b0a5140717764703691b11b75 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:51:09,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:51:09,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:51:09,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:51:09,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:51:09,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:51:09,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:51:09,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:51:09,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:51:09,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:51:09,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:51:09,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:51:09,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:51:09,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:51:09,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:51:09,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:51:09,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:51:09,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:51:09,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:51:09,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:51:09,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:51:09,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:51:09,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:51:09,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:51:09,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:51:09,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:51:09,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:51:09,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:51:09,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:51:09,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:51:09,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:51:09,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:51:09,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:51:09,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:51:09,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:51:09,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:51:09,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:51:09,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:51:09,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:51:09,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:51:09,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:51:09,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:51:09,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:51:09,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:51:09,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:51:09,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:51:09,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:51:09,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:51:09,927 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:51:09,927 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:51:09,927 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:51:09,928 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:51:09,929 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:51:09,929 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:51:09,929 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:51:09,930 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:51:09,930 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:51:09,930 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:51:09,931 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:51:09,931 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:51:09,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:51:09,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:51:09,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:51:09,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:51:09,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:51:09,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:51:09,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:51:09,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:51:09,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:51:09,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:51:09,935 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:51:09,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:51:09,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:51:09,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:51:09,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:51:09,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:51:09,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:51:09,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:51:09,937 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:51:09,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:51:09,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:51:09,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:51:09,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:51:09,939 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35eb4fe61244b47e62120cf84d8eaed931ae7a7b0a5140717764703691b11b75 [2021-11-23 03:51:10,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:51:10,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:51:10,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:51:10,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:51:10,278 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:51:10,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-23 03:51:10,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/data/51991979d/b08a8045fc7b4b0383e73e4cc7084ca2/FLAG921fd2bd2 [2021-11-23 03:51:10,895 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:51:10,896 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-23 03:51:10,927 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/data/51991979d/b08a8045fc7b4b0383e73e4cc7084ca2/FLAG921fd2bd2 [2021-11-23 03:51:11,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/data/51991979d/b08a8045fc7b4b0383e73e4cc7084ca2 [2021-11-23 03:51:11,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:51:11,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:51:11,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:51:11,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:51:11,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:51:11,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:11,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c5b0052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11, skipping insertion in model container [2021-11-23 03:51:11,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:11,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:51:11,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:51:11,630 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2021-11-23 03:51:11,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:51:11,721 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:51:11,821 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2021-11-23 03:51:11,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:51:11,939 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:51:11,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11 WrapperNode [2021-11-23 03:51:11,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:51:11,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:51:11,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:51:11,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:51:11,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:11,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,015 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 933 [2021-11-23 03:51:12,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:51:12,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:51:12,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:51:12,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:51:12,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:51:12,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:51:12,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:51:12,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:51:12,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (1/1) ... [2021-11-23 03:51:12,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:51:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:12,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:51:12,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8771b83c-e55b-40e8-8ec3-855054173fbc/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:51:12,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:51:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:51:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:51:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:51:12,408 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:51:12,410 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:51:13,233 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:51:13,444 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:51:13,444 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:51:13,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:51:13 BoogieIcfgContainer [2021-11-23 03:51:13,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:51:13,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:51:13,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:51:13,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:51:13,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:51:11" (1/3) ... [2021-11-23 03:51:13,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1262d316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:51:13, skipping insertion in model container [2021-11-23 03:51:13,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:11" (2/3) ... [2021-11-23 03:51:13,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1262d316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:51:13, skipping insertion in model container [2021-11-23 03:51:13,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:51:13" (3/3) ... [2021-11-23 03:51:13,457 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-23 03:51:13,463 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:51:13,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:51:13,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:51:13,522 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:51:13,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:51:13,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 187 states have (on average 1.7112299465240641) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 03:51:13,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:13,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:13,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash -287928466, now seen corresponding path program 1 times [2021-11-23 03:51:13,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:13,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113817554] [2021-11-23 03:51:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:13,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:14,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113817554] [2021-11-23 03:51:14,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113817554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:14,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:14,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:51:14,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360715170] [2021-11-23 03:51:14,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:14,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:51:14,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:51:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:51:14,198 INFO L87 Difference]: Start difference. First operand has 189 states, 187 states have (on average 1.7112299465240641) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 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 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:14,758 INFO L93 Difference]: Finished difference Result 751 states and 1205 transitions. [2021-11-23 03:51:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:51:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-23 03:51:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:14,788 INFO L225 Difference]: With dead ends: 751 [2021-11-23 03:51:14,788 INFO L226 Difference]: Without dead ends: 643 [2021-11-23 03:51:14,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:51:14,799 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 1655 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:14,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 1666 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:51:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-23 03:51:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 633. [2021-11-23 03:51:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.4082278481012658) internal successors, (890), 632 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 890 transitions. [2021-11-23 03:51:14,935 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 890 transitions. Word has length 81 [2021-11-23 03:51:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:14,936 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 890 transitions. [2021-11-23 03:51:14,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 890 transitions. [2021-11-23 03:51:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 03:51:14,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:14,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:14,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:51:14,950 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash 132050834, now seen corresponding path program 1 times [2021-11-23 03:51:14,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:14,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195878902] [2021-11-23 03:51:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:14,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:15,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:15,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195878902] [2021-11-23 03:51:15,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195878902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:15,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:15,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:51:15,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936229307] [2021-11-23 03:51:15,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:15,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:51:15,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:51:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:51:15,150 INFO L87 Difference]: Start difference. First operand 633 states and 890 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:15,489 INFO L93 Difference]: Finished difference Result 1553 states and 2241 transitions. [2021-11-23 03:51:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:51:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 03:51:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:15,496 INFO L225 Difference]: With dead ends: 1553 [2021-11-23 03:51:15,497 INFO L226 Difference]: Without dead ends: 1006 [2021-11-23 03:51:15,500 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:51:15,502 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 654 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:15,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 270 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:51:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-11-23 03:51:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1004. [2021-11-23 03:51:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.4376869391824527) internal successors, (1442), 1003 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1442 transitions. [2021-11-23 03:51:15,613 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1442 transitions. Word has length 82 [2021-11-23 03:51:15,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:15,618 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1442 transitions. [2021-11-23 03:51:15,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1442 transitions. [2021-11-23 03:51:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 03:51:15,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:15,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:15,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:51:15,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1214095645, now seen corresponding path program 1 times [2021-11-23 03:51:15,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:15,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420558850] [2021-11-23 03:51:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:15,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:15,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420558850] [2021-11-23 03:51:15,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420558850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:15,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:15,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:51:15,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420760150] [2021-11-23 03:51:15,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:15,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:51:15,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:51:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:51:15,753 INFO L87 Difference]: Start difference. First operand 1004 states and 1442 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:16,208 INFO L93 Difference]: Finished difference Result 2636 states and 3862 transitions. [2021-11-23 03:51:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:51:16,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 03:51:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:16,221 INFO L225 Difference]: With dead ends: 2636 [2021-11-23 03:51:16,221 INFO L226 Difference]: Without dead ends: 1748 [2021-11-23 03:51:16,223 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:51:16,230 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 637 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:16,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 278 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:51:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-11-23 03:51:16,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1746. [2021-11-23 03:51:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 1.4567335243553008) internal successors, (2542), 1745 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2542 transitions. [2021-11-23 03:51:16,383 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2542 transitions. Word has length 82 [2021-11-23 03:51:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:16,384 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2542 transitions. [2021-11-23 03:51:16,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2542 transitions. [2021-11-23 03:51:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 03:51:16,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:16,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:16,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:51:16,387 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1555513659, now seen corresponding path program 1 times [2021-11-23 03:51:16,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:16,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591711662] [2021-11-23 03:51:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:16,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:16,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591711662] [2021-11-23 03:51:16,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591711662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:16,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:16,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:51:16,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854749180] [2021-11-23 03:51:16,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:16,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:51:16,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:16,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:51:16,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:51:16,470 INFO L87 Difference]: Start difference. First operand 1746 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:16,976 INFO L93 Difference]: Finished difference Result 4784 states and 7062 transitions. [2021-11-23 03:51:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:51:16,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 03:51:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:16,996 INFO L225 Difference]: With dead ends: 4784 [2021-11-23 03:51:16,997 INFO L226 Difference]: Without dead ends: 3232 [2021-11-23 03:51:16,999 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:51:17,001 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 644 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:17,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 287 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:51:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-23 03:51:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3230. [2021-11-23 03:51:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.4673273459275318) internal successors, (4738), 3229 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 4738 transitions. [2021-11-23 03:51:17,330 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 4738 transitions. Word has length 82 [2021-11-23 03:51:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:17,331 INFO L470 AbstractCegarLoop]: Abstraction has 3230 states and 4738 transitions. [2021-11-23 03:51:17,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 4738 transitions. [2021-11-23 03:51:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 03:51:17,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:17,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:17,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:51:17,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash -369548300, now seen corresponding path program 1 times [2021-11-23 03:51:17,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841240952] [2021-11-23 03:51:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:17,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:17,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:17,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841240952] [2021-11-23 03:51:17,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841240952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:17,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:17,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:51:17,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46480295] [2021-11-23 03:51:17,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:17,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:51:17,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:51:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:51:17,467 INFO L87 Difference]: Start difference. First operand 3230 states and 4738 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:18,262 INFO L93 Difference]: Finished difference Result 9277 states and 13713 transitions. [2021-11-23 03:51:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:51:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 03:51:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:18,301 INFO L225 Difference]: With dead ends: 9277 [2021-11-23 03:51:18,301 INFO L226 Difference]: Without dead ends: 6200 [2021-11-23 03:51:18,307 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:51:18,308 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 614 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:18,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 286 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:51:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2021-11-23 03:51:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 6198. [2021-11-23 03:51:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6198 states, 6197 states have (on average 1.4690979506212682) internal successors, (9104), 6197 states have internal predecessors, (9104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 9104 transitions. [2021-11-23 03:51:18,905 INFO L78 Accepts]: Start accepts. Automaton has 6198 states and 9104 transitions. Word has length 82 [2021-11-23 03:51:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:18,905 INFO L470 AbstractCegarLoop]: Abstraction has 6198 states and 9104 transitions. [2021-11-23 03:51:18,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6198 states and 9104 transitions. [2021-11-23 03:51:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 03:51:18,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:18,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:18,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:51:18,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1738975743, now seen corresponding path program 1 times [2021-11-23 03:51:18,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:18,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522398845] [2021-11-23 03:51:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:18,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:18,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522398845] [2021-11-23 03:51:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522398845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:18,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:18,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:51:18,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464572462] [2021-11-23 03:51:18,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:18,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:51:18,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:51:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:51:18,977 INFO L87 Difference]: Start difference. First operand 6198 states and 9104 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:20,077 INFO L93 Difference]: Finished difference Result 18271 states and 26937 transitions. [2021-11-23 03:51:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:51:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-23 03:51:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:20,155 INFO L225 Difference]: With dead ends: 18271 [2021-11-23 03:51:20,155 INFO L226 Difference]: Without dead ends: 12136 [2021-11-23 03:51:20,168 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:51:20,169 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 641 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:20,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 262 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:51:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12136 states. [2021-11-23 03:51:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12136 to 12134. [2021-11-23 03:51:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 1.4622105002884696) internal successors, (17741), 12133 states have internal predecessors, (17741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 17741 transitions. [2021-11-23 03:51:21,292 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 17741 transitions. Word has length 82 [2021-11-23 03:51:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:21,293 INFO L470 AbstractCegarLoop]: Abstraction has 12134 states and 17741 transitions. [2021-11-23 03:51:21,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 17741 transitions. [2021-11-23 03:51:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:51:21,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:21,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:21,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:51:21,295 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1616521928, now seen corresponding path program 1 times [2021-11-23 03:51:21,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:21,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004722035] [2021-11-23 03:51:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:21,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:21,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:21,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004722035] [2021-11-23 03:51:21,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004722035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:21,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:21,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:51:21,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820340624] [2021-11-23 03:51:21,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:21,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:51:21,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:51:21,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:51:21,363 INFO L87 Difference]: Start difference. First operand 12134 states and 17741 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:22,312 INFO L93 Difference]: Finished difference Result 24189 states and 35393 transitions. [2021-11-23 03:51:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:51:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 03:51:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:22,356 INFO L225 Difference]: With dead ends: 24189 [2021-11-23 03:51:22,356 INFO L226 Difference]: Without dead ends: 12134 [2021-11-23 03:51:22,373 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:51:22,374 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 533 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:22,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 203 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:51:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-11-23 03:51:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 12134. [2021-11-23 03:51:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 1.4621280804417705) internal successors, (17740), 12133 states have internal predecessors, (17740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 17740 transitions. [2021-11-23 03:51:23,279 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 17740 transitions. Word has length 83 [2021-11-23 03:51:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:23,279 INFO L470 AbstractCegarLoop]: Abstraction has 12134 states and 17740 transitions. [2021-11-23 03:51:23,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 17740 transitions. [2021-11-23 03:51:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:51:23,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:23,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:23,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:51:23,282 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash -779085158, now seen corresponding path program 1 times [2021-11-23 03:51:23,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:23,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390552478] [2021-11-23 03:51:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:23,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:24,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390552478] [2021-11-23 03:51:24,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390552478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:24,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:24,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 03:51:24,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898313574] [2021-11-23 03:51:24,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:24,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:51:24,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:24,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:51:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:51:24,414 INFO L87 Difference]: Start difference. First operand 12134 states and 17740 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:27,595 INFO L93 Difference]: Finished difference Result 25992 states and 37856 transitions. [2021-11-23 03:51:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:51:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 03:51:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:27,668 INFO L225 Difference]: With dead ends: 25992 [2021-11-23 03:51:27,668 INFO L226 Difference]: Without dead ends: 25990 [2021-11-23 03:51:27,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:51:27,677 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 1690 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:27,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1690 Valid, 2512 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:51:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25990 states. [2021-11-23 03:51:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25990 to 19540. [2021-11-23 03:51:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19540 states, 19539 states have (on average 1.4556527969701623) internal successors, (28442), 19539 states have internal predecessors, (28442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19540 states to 19540 states and 28442 transitions. [2021-11-23 03:51:29,411 INFO L78 Accepts]: Start accepts. Automaton has 19540 states and 28442 transitions. Word has length 83 [2021-11-23 03:51:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:29,411 INFO L470 AbstractCegarLoop]: Abstraction has 19540 states and 28442 transitions. [2021-11-23 03:51:29,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 19540 states and 28442 transitions. [2021-11-23 03:51:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:51:29,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:29,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:29,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:51:29,414 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash -658228550, now seen corresponding path program 1 times [2021-11-23 03:51:29,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:29,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680545616] [2021-11-23 03:51:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:29,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:30,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:30,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680545616] [2021-11-23 03:51:30,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680545616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:30,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:30,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 03:51:30,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306328799] [2021-11-23 03:51:30,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:30,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:51:30,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:51:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:51:30,257 INFO L87 Difference]: Start difference. First operand 19540 states and 28442 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:33,347 INFO L93 Difference]: Finished difference Result 29753 states and 43228 transitions. [2021-11-23 03:51:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:51:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 03:51:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:33,424 INFO L225 Difference]: With dead ends: 29753 [2021-11-23 03:51:33,424 INFO L226 Difference]: Without dead ends: 29751 [2021-11-23 03:51:33,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:51:33,435 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 1522 mSDsluCounter, 2881 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 3234 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:33,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 3234 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:51:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29751 states. [2021-11-23 03:51:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29751 to 19567. [2021-11-23 03:51:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19567 states, 19566 states have (on average 1.4553817847286108) internal successors, (28476), 19566 states have internal predecessors, (28476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19567 states to 19567 states and 28476 transitions. [2021-11-23 03:51:35,067 INFO L78 Accepts]: Start accepts. Automaton has 19567 states and 28476 transitions. Word has length 83 [2021-11-23 03:51:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:35,067 INFO L470 AbstractCegarLoop]: Abstraction has 19567 states and 28476 transitions. [2021-11-23 03:51:35,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 19567 states and 28476 transitions. [2021-11-23 03:51:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:51:35,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:35,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:35,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:51:35,070 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1354915078, now seen corresponding path program 1 times [2021-11-23 03:51:35,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:35,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825188077] [2021-11-23 03:51:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:35,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:36,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:36,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825188077] [2021-11-23 03:51:36,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825188077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:36,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:36,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-23 03:51:36,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741892548] [2021-11-23 03:51:36,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:36,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 03:51:36,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 03:51:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:51:36,031 INFO L87 Difference]: Start difference. First operand 19567 states and 28476 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:40,423 INFO L93 Difference]: Finished difference Result 38928 states and 56506 transitions. [2021-11-23 03:51:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 03:51:40,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 03:51:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:40,523 INFO L225 Difference]: With dead ends: 38928 [2021-11-23 03:51:40,523 INFO L226 Difference]: Without dead ends: 38926 [2021-11-23 03:51:40,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=387, Invalid=1095, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 03:51:40,535 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 1579 mSDsluCounter, 2214 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:40,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1579 Valid, 2492 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:51:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38926 states. [2021-11-23 03:51:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38926 to 19599. [2021-11-23 03:51:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19599 states, 19598 states have (on average 1.4548933564649453) internal successors, (28513), 19598 states have internal predecessors, (28513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19599 states to 19599 states and 28513 transitions. [2021-11-23 03:51:42,189 INFO L78 Accepts]: Start accepts. Automaton has 19599 states and 28513 transitions. Word has length 83 [2021-11-23 03:51:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:42,190 INFO L470 AbstractCegarLoop]: Abstraction has 19599 states and 28513 transitions. [2021-11-23 03:51:42,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 19599 states and 28513 transitions. [2021-11-23 03:51:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:51:42,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:42,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:42,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:51:42,191 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash -907144486, now seen corresponding path program 1 times [2021-11-23 03:51:42,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:42,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144048966] [2021-11-23 03:51:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:42,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:42,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:42,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144048966] [2021-11-23 03:51:42,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144048966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:42,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:42,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 03:51:42,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494737340] [2021-11-23 03:51:42,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:42,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:51:42,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:51:42,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:51:42,958 INFO L87 Difference]: Start difference. First operand 19599 states and 28513 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:45,688 INFO L93 Difference]: Finished difference Result 26314 states and 38180 transitions. [2021-11-23 03:51:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:51:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 03:51:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:45,716 INFO L225 Difference]: With dead ends: 26314 [2021-11-23 03:51:45,716 INFO L226 Difference]: Without dead ends: 24008 [2021-11-23 03:51:45,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:51:45,728 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 1309 mSDsluCounter, 3539 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:45,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1309 Valid, 3877 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:51:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24008 states. [2021-11-23 03:51:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24008 to 21732. [2021-11-23 03:51:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21732 states, 21731 states have (on average 1.452763333486724) internal successors, (31570), 21731 states have internal predecessors, (31570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21732 states to 21732 states and 31570 transitions. [2021-11-23 03:51:47,419 INFO L78 Accepts]: Start accepts. Automaton has 21732 states and 31570 transitions. Word has length 83 [2021-11-23 03:51:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:47,419 INFO L470 AbstractCegarLoop]: Abstraction has 21732 states and 31570 transitions. [2021-11-23 03:51:47,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 21732 states and 31570 transitions. [2021-11-23 03:51:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:51:47,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:47,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:47,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:51:47,422 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1407077766, now seen corresponding path program 1 times [2021-11-23 03:51:47,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:47,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11742604] [2021-11-23 03:51:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:47,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:48,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:48,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11742604] [2021-11-23 03:51:48,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11742604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:48,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:48,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 03:51:48,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726644826] [2021-11-23 03:51:48,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:48,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:51:48,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:51:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:51:48,310 INFO L87 Difference]: Start difference. First operand 21732 states and 31570 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:52,794 INFO L93 Difference]: Finished difference Result 38989 states and 56674 transitions. [2021-11-23 03:51:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:51:52,794 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 03:51:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:52,851 INFO L225 Difference]: With dead ends: 38989 [2021-11-23 03:51:52,852 INFO L226 Difference]: Without dead ends: 38987 [2021-11-23 03:51:52,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:51:52,865 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 1356 mSDsluCounter, 3157 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:52,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 3531 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:51:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38987 states. [2021-11-23 03:51:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38987 to 23587. [2021-11-23 03:51:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23587 states, 23586 states have (on average 1.4531501738319341) internal successors, (34274), 23586 states have internal predecessors, (34274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23587 states to 23587 states and 34274 transitions. [2021-11-23 03:51:54,842 INFO L78 Accepts]: Start accepts. Automaton has 23587 states and 34274 transitions. Word has length 83 [2021-11-23 03:51:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:54,842 INFO L470 AbstractCegarLoop]: Abstraction has 23587 states and 34274 transitions. [2021-11-23 03:51:54,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 23587 states and 34274 transitions. [2021-11-23 03:51:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 03:51:54,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:54,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:54,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:51:54,849 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash 746454210, now seen corresponding path program 1 times [2021-11-23 03:51:54,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:54,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788232291] [2021-11-23 03:51:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:54,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:55,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:55,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788232291] [2021-11-23 03:51:55,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788232291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:55,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:55,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 03:51:55,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062965577] [2021-11-23 03:51:55,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:55,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:51:55,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:51:55,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:51:55,708 INFO L87 Difference]: Start difference. First operand 23587 states and 34274 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 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) [2021-11-23 03:52:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:00,117 INFO L93 Difference]: Finished difference Result 45763 states and 66651 transitions. [2021-11-23 03:52:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:52:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 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 84 [2021-11-23 03:52:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:00,180 INFO L225 Difference]: With dead ends: 45763 [2021-11-23 03:52:00,180 INFO L226 Difference]: Without dead ends: 45761 [2021-11-23 03:52:00,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:52:00,191 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 2028 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:00,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 1984 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:52:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45761 states. [2021-11-23 03:52:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45761 to 26287. [2021-11-23 03:52:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26287 states, 26286 states have (on average 1.454424408430343) internal successors, (38231), 26286 states have internal predecessors, (38231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26287 states to 26287 states and 38231 transitions. [2021-11-23 03:52:02,235 INFO L78 Accepts]: Start accepts. Automaton has 26287 states and 38231 transitions. Word has length 84 [2021-11-23 03:52:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:02,235 INFO L470 AbstractCegarLoop]: Abstraction has 26287 states and 38231 transitions. [2021-11-23 03:52:02,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 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) [2021-11-23 03:52:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26287 states and 38231 transitions. [2021-11-23 03:52:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:52:02,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:02,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:02,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:52:02,237 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash -213407002, now seen corresponding path program 1 times [2021-11-23 03:52:02,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:02,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71553881] [2021-11-23 03:52:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:02,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:03,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:03,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71553881] [2021-11-23 03:52:03,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71553881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:03,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:03,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 03:52:03,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630875188] [2021-11-23 03:52:03,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:03,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:52:03,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:03,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:52:03,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:52:03,271 INFO L87 Difference]: Start difference. First operand 26287 states and 38231 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:07,922 INFO L93 Difference]: Finished difference Result 41980 states and 60904 transitions. [2021-11-23 03:52:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:52:07,923 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:52:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:07,985 INFO L225 Difference]: With dead ends: 41980 [2021-11-23 03:52:07,985 INFO L226 Difference]: Without dead ends: 41978 [2021-11-23 03:52:07,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 03:52:08,000 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 1460 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:08,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 3406 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:52:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41978 states. [2021-11-23 03:52:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41978 to 26287. [2021-11-23 03:52:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26287 states, 26286 states have (on average 1.454424408430343) internal successors, (38231), 26286 states have internal predecessors, (38231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26287 states to 26287 states and 38231 transitions. [2021-11-23 03:52:10,245 INFO L78 Accepts]: Start accepts. Automaton has 26287 states and 38231 transitions. Word has length 85 [2021-11-23 03:52:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:10,245 INFO L470 AbstractCegarLoop]: Abstraction has 26287 states and 38231 transitions. [2021-11-23 03:52:10,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:10,246 INFO L276 IsEmpty]: Start isEmpty. Operand 26287 states and 38231 transitions. [2021-11-23 03:52:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:52:10,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:10,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:10,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:52:10,247 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:10,248 INFO L85 PathProgramCache]: Analyzing trace with hash -462322938, now seen corresponding path program 1 times [2021-11-23 03:52:10,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:10,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202432376] [2021-11-23 03:52:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:10,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:11,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:11,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202432376] [2021-11-23 03:52:11,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202432376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:11,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:11,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 03:52:11,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051862370] [2021-11-23 03:52:11,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:11,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:52:11,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:11,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:52:11,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:52:11,165 INFO L87 Difference]: Start difference. First operand 26287 states and 38231 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:15,483 INFO L93 Difference]: Finished difference Result 48318 states and 70112 transitions. [2021-11-23 03:52:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 03:52:15,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:52:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:15,541 INFO L225 Difference]: With dead ends: 48318 [2021-11-23 03:52:15,541 INFO L226 Difference]: Without dead ends: 43708 [2021-11-23 03:52:15,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:52:15,556 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 1435 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:15,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 2018 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:52:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43708 states. [2021-11-23 03:52:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43708 to 30329. [2021-11-23 03:52:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30329 states, 30328 states have (on average 1.4518596676338698) internal successors, (44032), 30328 states have internal predecessors, (44032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30329 states to 30329 states and 44032 transitions. [2021-11-23 03:52:18,365 INFO L78 Accepts]: Start accepts. Automaton has 30329 states and 44032 transitions. Word has length 85 [2021-11-23 03:52:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:18,365 INFO L470 AbstractCegarLoop]: Abstraction has 30329 states and 44032 transitions. [2021-11-23 03:52:18,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 30329 states and 44032 transitions. [2021-11-23 03:52:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:52:18,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:18,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:18,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:52:18,367 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash -731010234, now seen corresponding path program 1 times [2021-11-23 03:52:18,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827253370] [2021-11-23 03:52:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:18,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:19,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827253370] [2021-11-23 03:52:19,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827253370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:19,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:19,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-23 03:52:19,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546690820] [2021-11-23 03:52:19,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:19,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 03:52:19,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:19,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 03:52:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:52:19,359 INFO L87 Difference]: Start difference. First operand 30329 states and 44032 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:24,651 INFO L93 Difference]: Finished difference Result 46086 states and 66778 transitions. [2021-11-23 03:52:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 03:52:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:52:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:24,719 INFO L225 Difference]: With dead ends: 46086 [2021-11-23 03:52:24,719 INFO L226 Difference]: Without dead ends: 46084 [2021-11-23 03:52:24,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 03:52:24,731 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 1507 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:24,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 2968 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:52:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46084 states. [2021-11-23 03:52:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46084 to 30353. [2021-11-23 03:52:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30353 states, 30352 states have (on average 1.4517329994728518) internal successors, (44063), 30352 states have internal predecessors, (44063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30353 states to 30353 states and 44063 transitions. [2021-11-23 03:52:27,629 INFO L78 Accepts]: Start accepts. Automaton has 30353 states and 44063 transitions. Word has length 85 [2021-11-23 03:52:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:27,629 INFO L470 AbstractCegarLoop]: Abstraction has 30353 states and 44063 transitions. [2021-11-23 03:52:27,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 30353 states and 44063 transitions. [2021-11-23 03:52:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:52:27,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:27,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:27,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:52:27,632 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash -283239642, now seen corresponding path program 1 times [2021-11-23 03:52:27,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:27,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637302995] [2021-11-23 03:52:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:27,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:28,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:28,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637302995] [2021-11-23 03:52:28,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637302995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:28,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:28,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 03:52:28,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808161615] [2021-11-23 03:52:28,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:28,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:52:28,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:28,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:52:28,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:52:28,616 INFO L87 Difference]: Start difference. First operand 30353 states and 44063 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:33,527 INFO L93 Difference]: Finished difference Result 39222 states and 56810 transitions. [2021-11-23 03:52:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:52:33,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:52:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:33,578 INFO L225 Difference]: With dead ends: 39222 [2021-11-23 03:52:33,578 INFO L226 Difference]: Without dead ends: 36916 [2021-11-23 03:52:33,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 03:52:33,596 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 1191 mSDsluCounter, 3479 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 3839 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:33,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 3839 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:52:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36916 states. [2021-11-23 03:52:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36916 to 30350. [2021-11-23 03:52:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30350 states, 30349 states have (on average 1.4517447032851165) internal successors, (44059), 30349 states have internal predecessors, (44059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30350 states to 30350 states and 44059 transitions. [2021-11-23 03:52:36,657 INFO L78 Accepts]: Start accepts. Automaton has 30350 states and 44059 transitions. Word has length 85 [2021-11-23 03:52:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:36,657 INFO L470 AbstractCegarLoop]: Abstraction has 30350 states and 44059 transitions. [2021-11-23 03:52:36,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 30350 states and 44059 transitions. [2021-11-23 03:52:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:52:36,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:36,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:36,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 03:52:36,659 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash 578943846, now seen corresponding path program 1 times [2021-11-23 03:52:36,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617910099] [2021-11-23 03:52:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:36,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:37,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:37,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617910099] [2021-11-23 03:52:37,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617910099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:37,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:37,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-23 03:52:37,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308259524] [2021-11-23 03:52:37,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:37,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 03:52:37,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 03:52:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:52:37,620 INFO L87 Difference]: Start difference. First operand 30350 states and 44059 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:42,204 INFO L93 Difference]: Finished difference Result 37052 states and 53614 transitions. [2021-11-23 03:52:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:52:42,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:52:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:42,263 INFO L225 Difference]: With dead ends: 37052 [2021-11-23 03:52:42,263 INFO L226 Difference]: Without dead ends: 37050 [2021-11-23 03:52:42,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:52:42,276 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 1362 mSDsluCounter, 3261 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 3698 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:42,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 3698 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:52:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37050 states. [2021-11-23 03:52:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37050 to 31515. [2021-11-23 03:52:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31515 states, 31514 states have (on average 1.4503712635653996) internal successors, (45707), 31514 states have internal predecessors, (45707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31515 states to 31515 states and 45707 transitions. [2021-11-23 03:52:45,396 INFO L78 Accepts]: Start accepts. Automaton has 31515 states and 45707 transitions. Word has length 85 [2021-11-23 03:52:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:45,396 INFO L470 AbstractCegarLoop]: Abstraction has 31515 states and 45707 transitions. [2021-11-23 03:52:45,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31515 states and 45707 transitions. [2021-11-23 03:52:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:52:45,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:45,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:45,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 03:52:45,398 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1755228838, now seen corresponding path program 1 times [2021-11-23 03:52:45,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:45,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245848585] [2021-11-23 03:52:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:45,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:46,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:46,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245848585] [2021-11-23 03:52:46,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245848585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:46,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:46,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 03:52:46,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984003131] [2021-11-23 03:52:46,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:46,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:52:46,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:52:46,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:52:46,355 INFO L87 Difference]: Start difference. First operand 31515 states and 45707 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:52,555 INFO L93 Difference]: Finished difference Result 50801 states and 73538 transitions. [2021-11-23 03:52:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:52:52,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:52:52,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:52,636 INFO L225 Difference]: With dead ends: 50801 [2021-11-23 03:52:52,636 INFO L226 Difference]: Without dead ends: 50799 [2021-11-23 03:52:52,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 03:52:52,654 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 1570 mSDsluCounter, 2047 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:52,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 2349 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:52:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50799 states. [2021-11-23 03:52:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50799 to 31530. [2021-11-23 03:52:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31530 states, 31529 states have (on average 1.4503472993117448) internal successors, (45728), 31529 states have internal predecessors, (45728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31530 states to 31530 states and 45728 transitions. [2021-11-23 03:52:56,202 INFO L78 Accepts]: Start accepts. Automaton has 31530 states and 45728 transitions. Word has length 85 [2021-11-23 03:52:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:56,203 INFO L470 AbstractCegarLoop]: Abstraction has 31530 states and 45728 transitions. [2021-11-23 03:52:56,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 31530 states and 45728 transitions. [2021-11-23 03:52:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:52:56,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:56,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:56,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 03:52:56,205 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:56,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1876085446, now seen corresponding path program 1 times [2021-11-23 03:52:56,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:56,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324761412] [2021-11-23 03:52:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:56,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:57,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324761412] [2021-11-23 03:52:57,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324761412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:57,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:57,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 03:52:57,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936359740] [2021-11-23 03:52:57,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:57,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:52:57,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:52:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:52:57,113 INFO L87 Difference]: Start difference. First operand 31530 states and 45728 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:03,763 INFO L93 Difference]: Finished difference Result 58004 states and 84184 transitions. [2021-11-23 03:53:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:53:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:53:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:03,844 INFO L225 Difference]: With dead ends: 58004 [2021-11-23 03:53:03,844 INFO L226 Difference]: Without dead ends: 58002 [2021-11-23 03:53:03,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 03:53:03,858 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 1464 mSDsluCounter, 3292 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 3631 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:03,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 3631 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:53:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58002 states. [2021-11-23 03:53:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58002 to 31536. [2021-11-23 03:53:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31536 states, 31535 states have (on average 1.4502933248771206) internal successors, (45735), 31535 states have internal predecessors, (45735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31536 states to 31536 states and 45735 transitions. [2021-11-23 03:53:07,316 INFO L78 Accepts]: Start accepts. Automaton has 31536 states and 45735 transitions. Word has length 85 [2021-11-23 03:53:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:07,316 INFO L470 AbstractCegarLoop]: Abstraction has 31536 states and 45735 transitions. [2021-11-23 03:53:07,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 31536 states and 45735 transitions. [2021-11-23 03:53:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:53:07,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:07,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:07,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 03:53:07,319 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1179398918, now seen corresponding path program 1 times [2021-11-23 03:53:07,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:07,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488863666] [2021-11-23 03:53:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:07,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:08,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:08,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488863666] [2021-11-23 03:53:08,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488863666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:08,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:53:08,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-23 03:53:08,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999594453] [2021-11-23 03:53:08,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:08,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:53:08,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:08,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:53:08,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:53:08,409 INFO L87 Difference]: Start difference. First operand 31536 states and 45735 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:16,650 INFO L93 Difference]: Finished difference Result 58124 states and 84313 transitions. [2021-11-23 03:53:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 03:53:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:53:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:16,734 INFO L225 Difference]: With dead ends: 58124 [2021-11-23 03:53:16,734 INFO L226 Difference]: Without dead ends: 58122 [2021-11-23 03:53:16,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=547, Invalid=1805, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:53:16,750 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2351 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2351 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:16,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2351 Valid, 2376 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:53:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58122 states. [2021-11-23 03:53:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58122 to 31554. [2021-11-23 03:53:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31554 states, 31553 states have (on average 1.4502266028586823) internal successors, (45759), 31553 states have internal predecessors, (45759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31554 states to 31554 states and 45759 transitions. [2021-11-23 03:53:20,488 INFO L78 Accepts]: Start accepts. Automaton has 31554 states and 45759 transitions. Word has length 85 [2021-11-23 03:53:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:20,489 INFO L470 AbstractCegarLoop]: Abstraction has 31554 states and 45759 transitions. [2021-11-23 03:53:20,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 31554 states and 45759 transitions. [2021-11-23 03:53:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:53:20,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:20,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:20,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 03:53:20,490 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1627169510, now seen corresponding path program 1 times [2021-11-23 03:53:20,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:20,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650330728] [2021-11-23 03:53:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:20,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:21,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:21,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650330728] [2021-11-23 03:53:21,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650330728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:21,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:53:21,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 03:53:21,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597375170] [2021-11-23 03:53:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:21,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:53:21,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:53:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:53:21,366 INFO L87 Difference]: Start difference. First operand 31554 states and 45759 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:28,925 INFO L93 Difference]: Finished difference Result 60930 states and 88340 transitions. [2021-11-23 03:53:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 03:53:28,928 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-23 03:53:28,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:29,004 INFO L225 Difference]: With dead ends: 60930 [2021-11-23 03:53:29,005 INFO L226 Difference]: Without dead ends: 56320 [2021-11-23 03:53:29,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:53:29,021 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 1332 mSDsluCounter, 3628 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 3964 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:29,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1332 Valid, 3964 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:53:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56320 states. [2021-11-23 03:53:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56320 to 33407. [2021-11-23 03:53:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33407 states, 33406 states have (on average 1.449679698257798) internal successors, (48428), 33406 states have internal predecessors, (48428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33407 states to 33407 states and 48428 transitions. [2021-11-23 03:53:33,237 INFO L78 Accepts]: Start accepts. Automaton has 33407 states and 48428 transitions. Word has length 85 [2021-11-23 03:53:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:33,237 INFO L470 AbstractCegarLoop]: Abstraction has 33407 states and 48428 transitions. [2021-11-23 03:53:33,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 33407 states and 48428 transitions. [2021-11-23 03:53:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 03:53:33,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:33,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:33,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 03:53:33,240 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1125221102, now seen corresponding path program 1 times [2021-11-23 03:53:33,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:33,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315706495] [2021-11-23 03:53:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:33,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:34,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:34,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315706495] [2021-11-23 03:53:34,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315706495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:34,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:53:34,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-23 03:53:34,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307249888] [2021-11-23 03:53:34,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:34,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 03:53:34,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 03:53:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:53:34,517 INFO L87 Difference]: Start difference. First operand 33407 states and 48428 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:45,446 INFO L93 Difference]: Finished difference Result 64793 states and 94146 transitions. [2021-11-23 03:53:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 03:53:45,446 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-23 03:53:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:45,538 INFO L225 Difference]: With dead ends: 64793 [2021-11-23 03:53:45,538 INFO L226 Difference]: Without dead ends: 64791 [2021-11-23 03:53:45,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=509, Invalid=1747, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 03:53:45,551 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 1982 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1982 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:45,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1982 Valid, 2813 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 03:53:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64791 states. [2021-11-23 03:53:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64791 to 33410. [2021-11-23 03:53:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33410 states, 33409 states have (on average 1.4496393187464456) internal successors, (48431), 33409 states have internal predecessors, (48431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33410 states to 33410 states and 48431 transitions. [2021-11-23 03:53:50,297 INFO L78 Accepts]: Start accepts. Automaton has 33410 states and 48431 transitions. Word has length 86 [2021-11-23 03:53:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:50,297 INFO L470 AbstractCegarLoop]: Abstraction has 33410 states and 48431 transitions. [2021-11-23 03:53:50,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:50,297 INFO L276 IsEmpty]: Start isEmpty. Operand 33410 states and 48431 transitions. [2021-11-23 03:53:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 03:53:50,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:50,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:50,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 03:53:50,299 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1246077710, now seen corresponding path program 1 times [2021-11-23 03:53:50,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:50,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788702275] [2021-11-23 03:53:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:50,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:51,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:51,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788702275] [2021-11-23 03:53:51,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788702275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:51,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:53:51,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 03:53:51,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059989352] [2021-11-23 03:53:51,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:51,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:53:51,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:51,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:53:51,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:53:51,056 INFO L87 Difference]: Start difference. First operand 33410 states and 48431 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)